Showing posts with label tornado. Show all posts
Showing posts with label tornado. Show all posts

Thursday, May 24, 2012

Late-May News and Updates

Hello Grotonweather Fans! I have been working very hard over the past couple of months on new and exciting things. I thought I would type up a blog to explain and promote some of these things.

First off is Finger Lakes Weather (www.fl-weather.com), my new weather forecasting and consulting business. It is my hope that Finger Lakes Weather will become my career, helping local businesses, organizations, and the public with private and customizable weather forecasts. Finger Lakes Weather offers a variety of "Forecast Packages" tailored specifically towards various groups. For the spring, I offered a frost forecast package and was able to do some free-trial forecasting for Fox Run Vineyards and Three Brothers Vineyards, both on Seneca Lake. I have plans for a forecast package for construction workers. Right now, I am offering a special on vacation forecasting...but more on that later. Check out Finger Lakes Weather (the website again is www.fl-weather.com) and join the Finger Lakes Facebook page.

Next up is the Grotonweather Radar Page (www.grotonweather.com/radar). I recently got some top-notch radar software that is used by many meteorologists, especially storm chasers and others interested in thunderstorms. This software allows me to upload the radar to the website, so that is what I have done. Furthermore, I can display things such as areas of possible hail, rotation in thunderstorms, winds, and watches and warnings. I can also zoom right in on a storm down to street-level. So far, this has been a HUGE success with hundred of views despite an overall quiet thunderstorm season thusfar.

A severe thunderstorm approaches Ithaca.
Success does not come without price, however. And in this case, the price is measured in bandwidth. For those not familiar, bandwidth is basically the amount of data transferred to and from a website. The radar page uploads large image files every few minutes and quickly ate up my monthly bandwidth limit. That in turn forced me to purchase a more expensive hosting plan. My costs for running Grotonweather.com, not including time spent, is now approaching $200 a year.

Since 2006, when I started this operation, I have not received any revenue from my website. I am dedicated to keeping the website free. As costs continue to rise, something has to be done to offset some of these costs. Rather than charge money for Grotonweather and rather than flat out asking for donations, I decided a fund-raiser would be the best idea.

This is where the vacation forecasting package from Finger Lakes Weather (www.fl-weather.com/vacation) comes back into play. As a fund-raiser, I am offering this service at a reduced price of just $10 per day or $50 per week. What does that entail? I will forecast for your travels to and from your vacation destination. I will forecast for you each morning of your trip so that you can know what to expect. If you have plans to engage in a certain activity- whether a day at the beach, a horseback ride, a bicycle tour...anything at all- I will forecast specifically for that activity and how the weather might impact your plans.

Furthermore, I will do severe weather forecasting for you. Say you are driving down the highway in Kansas and you see storms ahead. You can give me a call- no matter what time of day or night- and ask me if they are severe. Or, if you are enjoying your vacation (which you should be!), but storms (or a hurricane!) are coming, I will reach out to you and let you know.

I think this is a really neat and unique service and I believe it will help you make the most of your vacation. And it would really help relieve some of the costs I have. So please, consider signing up before June 10th to get the sale price. Even if your vacation is in August or later, book it now. Here is the link again: www.fl-weather.com/vacation

Moving on now, I am slowly working on a redesign of Grotonweather.com. I am really excited about how it looks so far. I did a survey a couple of weeks ago on displaying confidence and uncertainty in forecasts. The results were a tremendous help, so thank you to all who participated! I am now doing a smaller follow-up survey on a proposed forecast layout change. Please, if you could take a moment and fill it out, I would be very grateful. Here is the link: www.grotonweather.com/survey

If that was all not enough, I also started a new project on Facebook in an attempt to 1) combine my strong religious beliefs with my love for the weather 2) help those threatened by severe weather on a national level and 3) expand my forecasting beyond just the Finger Lakes. The result is the Storming Heaven Facebook group. If you believe in the power of prayer, go ahead an join up.

Back in late March, the Groton Public Library invited me to give an hour-long presentation. I presented on the Blizzard of 1993. Thank you to the library for the opportunity to speak! If you would like me to speak at your event or in your class (I've spoken at 3 schools since November), just send me an email or let me know on Facebook!

Thank you for reading this long post and for your continued support and interest in Grotonweather.com and the other projects I am working on. Stay tuned for more great features coming up...I am only getting started!!!

Monday, May 02, 2011

Severe Weather Awareness Week

This week is Severe Weather Awareness Week. In light of the recent severe and tornadic thunderstorms, I think its very important that we realize that dangerous and deadly weather can and does occur in our area. The first step to keeping yourself safe is education. I will be updating this blog each day with links to the National Weather Service pages for each day of Severe Weather Awareness Week.

Monday- Overview
Tuesday- Severe Thunderstorms
Wednesday- Severe Weather Preparedness
Thursday- Tornado Watches & Warnings
Friday- Flood Preparedness
Saturday- Communication of Hazardous Weather Information

Wednesday, April 06, 2011

Monday's Historic Thunderstorms

Story originally published on Syracuse.com by Drew Montreuil.

I wanted to take a couple moments and point out some pretty amazing things that happened Monday across the eastern half of the nation. A huge severe weather outbreak blasted across the Ohio and Tennessee Valleys and into the southeast. Severe weather was reported from Texas to Florida, northward into Pennsylvania. Even here in Central New York, we had a few strong thunderstorms. Three-quarter inch hail was reported Monday morning near Ithaca and in Norwich. Hail must measure one inch in diameter before it is considered "severe".

While the National Weather Service continues to do surveys of the damage, the number of reports will continue to increase. But here are some numbers that are just mind blowing:

As of 10AM Wednesday, there were 1377 total reports of wind damage, 1"+ hail or tornadoes from Monday. Since 2000, there has not been a single day with this many severe weather reports. Of the nearly 1400 reports, 1245 were damaging wind reports. The squall line responsible for this outbreak did not stop producing severe weather because it died; it simply moved off shore over the Atlantic Ocean. Unfortunately, there were a number of fatalities associated with these storms as tornadoes destroyed homes and trees were downed onto houses. The image above, from the Storm Prediction Center, shows the severe weather reports from Monday's historic outbreak. Blue dots represent wind damage, while red dots are tornado reports and green dots are hail an inch in diameter or greater. Click the image for a larger view.

More spring-like weather will be on the way for the East, including Central New York. Another powerful storm system will form over the Great Plains this weekend and head up into Canada. A cold front will blast across the Midwest, Southeast and Northeast, with more severe weather possible. Currently the Storm Prediction Center is highlighting areas from Minnesota and Wisconsin south to Texas and Louisiana and eastward to Ohio, Kentucky and Tennessee as the highest potential for severe weather. As we get closer to the weekend though, I would not be surprised to see that threat shifted further to the east. Whether or not we get into the thunderstorms once more is still a bit questionable, but at the very least, our temperatures will shoot into the 60s, maybe even near 70 Sunday and Monday.

Wednesday, March 09, 2011

What does an "Alert Mode" mean?

Every once in a while, grotonweather.com will go into "Alert Mode" for various weather phenomenon. Flooding, heavy snow and severe thunderstorms are the three most common prompters of an Alert Mode. But what exactly do I mean by this, and how do I determine when to go into Alert Mode. This post will hopefully help you understand this better.

The Alert Mode is reserved for special instances of exceptionally dangerous weather that will impact the lives of those in and around the Grotonweather.com forecast area. The weather during an Alert Mode threatens lives and property. Precautions to stay safe need to be taken during these events. These are among the most significant weather events our area sees, and are accompanied by widespread watches and warnings issued by the National Weather Service. The Alert Mode is meant as another way to highlight the potential dangers.

Obviously, not every significant weather event is worthy of an Alert Mode, and the decision to send Grotonweather.com into Alert Mode is taken very seriously. Only a few Alert Modes are issued each year. A combination of things has to be taken into account when going into Alert Mode:

First, the weather needs to be significant enough to create widespread dangerous conditions. Every severe thunderstorm is dangerous, and even a little freezing rain can cause deadly automobile accidents. However, most of the time, these dangerous weather events are more localized events that most Central New Yorkers are probably used to. For an event to garner an Alert Mode, it has to be above and beyond the "average" bad weather situation.

Secondly, there has to be a good deal of confidence this life threatening situation will occur. Often times, Alert Modes are prompted during an evolving situation. Such is often the case with severe thunderstorms and flash flooding. These situations will also lead to shorter Alert Mode times, as the dangerous weather is often shorter lived. Other situations, including snow and some flood events, may have Alert Modes lasting days due to the prolonged nature of the event. Typically, these types of Alert Modes can be issued further in advance due to a greater certainty of the event occurring. Still, Alert Modes will almost never be issued more than 24 hours prior to the start of an event. Instead, Grotonweather.com will go into Standby to raise awareness of the potential for devastating weather.

When an Alert Mode is issued, pay extra attention to Grotonweather.com and other weather media sources for frequent updates on the dangerous weather. The weather during these situations may rapidly change. It is strongly recommended that you become a follower of Grotonweather.com on Facebook and/or Twitter for these situations, as updates are frequently issued there. (Click here for our Facebook and Twitter pages). Often times (but not always due to other time restraints), special Grotonweather features are available during these times, including Weather Chats, Videos, safety tips and special maps.

The bottom line is this: as a meteorologist, I personally feel a responsibility to keep you informed and safe during severe weather. The absolute worst thing I can imagine is having a weather related fatality under my watch. The Grotonweather.com Alert Mode is meant to help prevent that from ever becoming a reality. If you see an Alert Mode has been issued, stay aware and "keep checking back for updates!"

Sunday, June 06, 2010

Tornado Watch to the south

An early morning tornado watch is in effect for the counties just south of Tompkins and Cortland counties down through Pennsylvania and Ohio. There are severe thunderstorm warnings for those same counties (Chemung and Tioga specifically) as thunderstorms out ahead of a cold front move across the area. The cold front is back over Western New York/Pennsylvania, with the low itself sitting over Western New York. With severe storms and a tornado watch on our doorstep, I felt a blog update would be more prudent for today.


As the cold front and low move east this morning, the wind fields will definitely be supportive of possible tornadoes, if more thunderstorms can form along the front. While I do not think there is enough instability this morning...and with all the clouds around I do not foresee us destabilizing...with the potential for a short lived tornado or two if storms were to form, I have to at least mention the possibility. What will likely happen is the cold front will move east of us and some more showers, maybe even a rumble of thunder, will effect us from time to time today. Keep a look out though, and listen for any potential warnings. The best chance for severe weather will be between now and the early afternoon. Beyond that, the front will move through and temperatures will drop, likely ending up in the 50s by sunset.

Saturday, July 11, 2009

Risks Upgraded

There have been a couple of changes in the forecast this morning as things area already rapidly evolving. Probably the most significant of these changes is that, instead of all the clouds and rain the models had been forecasting for us this morning, skies are clear. This is causing the atmosphere to destabilize quicker and more intensely than had been forecasted. Another thing to look at is the radar. Thunderstorms are widespread just west of Buffalo, and already, there are some storms popping out ahead of this main area...so the question of whether or not storms will form is out the window.

The Storm Prediction Center has us in a 30-30-5% risk for wind-hail-tornadoes, respectively. All three of those are on the upper end of their 'slight' risk category. After looking at a couple things, I moved my hail and win up to moderate, and kept tornadoes at slight. Since storms are already firing, I moved the thunderstorm risk all the way up, which the NWS in Binghamton also did on their threat outlooks.

Here is what I am expecting for each threat:

Thunderstorms: Extreme-
Widespread thunderstorms can be expected with almost everywhere getting a storm. Frequent lightning should accompany the storms, and a fair number of them will likely be severe.

Wind: Moderate-
With the sun out this morning and strong upper level winds, wind damage is likely somewhere in Central New York, with some possibility of widespread damaging winds. 3 to 7 damaging wind reports are possible in the Grotonweather forecast area (Tompkins, S. Cayuga and Cortland Counties), with more elsewhere in Central New York. Should a widespread wind event evolve, this will be increased to high.

Hail: Moderate-
With extra instablity from the sun this morning, and indications of favorable hail formation from both the models, and current observations, hail could become a major factor today. 3 to 7 severe (0.75" of bigger) hail reports in the forecast area is possible, with more elsewhere in Central New York. Hail sizes should stay below 1.5", but an isolated storm could produce up to 2" hail. An upgrade to a high risk is not expected at this time.

Tornadoes: Slight-
Little changes to the tornado forecast have been made. A tornado somewhere in Western and Central New York seems almost likely. Multiple tornadoes could be possible, but this certainty isn't enough for a moderate risk at the time. However, with strong southeast winds at the surface, winds at low levels out of the southwest, and upper level winds coming in from the west, the threat for tornadoes will need to be watched closely.

Friday, July 10, 2009

Friday Afternoon's Severe Weather Outlook for 7/11

I spent the morning and early afternoon down at the National Weather Service in Binghamton, where I am an intern this summer, and used some of their in-house tools to try to get a better handle on the severe weather threat tomorrow. I will mention that the meteorologists there this morning believe tomorrow will be an active day and seem to have a high confidence level.

One of the tools I used this morning was a form called the 'severe weather checklist'. This form has you enter in forecasted values for a variety of severe weather parameters. After doing so, it returns the 5 most similar severe weather days in recent Central New York history. When completing this checklist this morning, it returned 4 days of 'isolated supercells', including May 16th, 2009, which had 3 tornadoes in the area, and May 31, 2002, which had 4 tornadoes. The fifth day was classified as a 'broken line'. Hail was the primary threat from the five days collectively. That tells me that not everywhere tomorrow will see a strong thunderstorm....some areas may barely even get any rain. However, there is certainly potential for some severe weather, and someone will likely have to deal with a damaging storm.

Here is a glance at where I have my threat levels, and an in depth look at exactly what I mean by each threat level, as well as what would need to happen for an upgraded risk:

Thunderstorms: moderate-
Thunderstorms are likely across much of the area. A few places, however, will be missed and get little to no rain. Frequent lightning will accompany some of the storms.

High Winds: slight-
Some storms may contain strong winds. Wind damage will be isolated to scattered, with 3 to 10 reports in Central New York. Sunshine in the morning would increase the chances of wind damage, and could get this bumped up to a moderate risk.

Hail: slight-
Small hail will be possible with stronger storms tomorrow, but most hail should remain uner 1" in diameter. The strongest storms may produce up to 1.5" hail. 5-12 Severe hail (over 0.75") events can be expected in Central New York. This is still rather uncertain, and could be upgraded to a moderate risk should the models show a bit better conditions for hail tomorrow morning.

Tornadoes: slight-
Conditions are favorable for rotating storms, and tornadoes could form. My best current guess is that somewhere in Western, Central and Southern New York will see a weak tornado, but as many as 2 or 3 wouldn't surprise me. This would most likely not be upgraded to moderate unless numerous storms that have already developed are showing signs of becoming tornadic.

Expect the next website update to occur between 9 and 11 am tomorrow. A blog update should occur within 30 minutes of that. There also could be a quick blog update tonight. During the afternoon tomorrow, I plan to have the weather chat open and will be updating th blog and website as needed. Stay tuned!

Tuesday, June 09, 2009

Severe Storm Potential

I am very impressed with the atmosphere this morning and feel like this is perhaps the best severe weather set up we have had so far this spring. There is a cold front draped across eastern Ohio this morning that will move eastward and trigger thunderstorms. Ahead of that front, skies have cleared across western New York, creating an already unstable atmosphere even more so. I was surprised to see the instability indexes so high already this morning. You did not need me to tell you that, however, as the humidity this morning is making it feel very uncomfortable and muggy.

The main threat today is going to be large hail and damaging wind gusts. However, conditions also appear favorable for a tornado or two to form, so you will want to keep an eye to the sky. The Storm Prediction Center does not actually have us in a slight risk area today, for reasons that are beyond my understanding. I feel that the will reverse their thinking as the morning wears on and, with their 12:30pm update, add us to the slight risk area. You can check that by clicking here.

I will not be able to update this during the afternoon today. I will actually be down at the National Weather Service in Binghamton on my first day as a summer intern there. I do not think there could have been a better day for me to start, and I believe it will be a very active day down there. Click Here for the latest watches and warning, and click here for a look at the radar.

Saturday, May 09, 2009

A Look at Watch #280

The Storm Prediction Center has issued a Severe Thunderstorm Watch that stretches across almost all of New York State. It remains in effect until 7pm tonight. Here is a look at the exact counties it includes. As you can see, Tompkins, Cortland and S. Cayuga are right in the middle of it.


The main threat from this event is going to be damaging winds. Hail will also be possible, and my gut feeling is there will be a tornado somewhere in the watch box. The official probabilities that the SPC has put with the watch:
Tornadoes
Probability of 2 or more tornadoes

Low (20%)

Probability of 1 or more strong (F2-F5) tornadoes

Low (5%)

Wind
Probability of 10 or more severe wind events

Mod (60%)

Probability of 1 or more wind events > 65 knots

Mod (30%)

Hail
Probability of 10 or more severe hail events

Mod (30%)

Probability of 1 or more hailstones > 2 inches

Low (20%)

Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events

High (80%)


Since it is at the top of the hour, the current observations and indicies will not be in for another 20-40 minutes. Looking at the data from noon, though, it is obvious to me that the atmosphere is quickly destabilizing. Also, a pocket of strong winds in the upper atmosphere is beginning to move into Western New York, and will spread over the rest of the state, enhancing the thunderstorms. Storms are going to develop from west to east, and have already begun to fire up across Western New York, Lake Erie and Lake Ontario. These storms should organize into a squall line eventually, which is when the greatest threat for wind damage will be. The highest tornado and hail threat will be just prior to that, when the storms are more individual cells.

Be sure to keep checking back through the afternoon for the latest!

First Watch of the Season!

12:45 Update: Severe Thunderstorm Watch issued! Full blog post analyzing the situation coming...

The Storm Prediction Center has outlined Central and Eastern New York as an area where a weather watch will "likely" be needed. The watch will likely be issued by 1PM. Stay tuned! I am watching this carefully and will have the watch up on the site within moments of its issuance!

>Click here for your full forecast

Sunday, September 14, 2008

Abnormal September Tornado Threat

I can't say I saw this one coming, but I get up this morning and almost everything I look at points to today being a rough day across parts of Central New York. Last year in meteorology class, we went over tornado forecasting in quite some detail. A lot of the things we were told to look for have started to line up. The one thing that will probably prevent this from being an outbreak is the fact that the air aloft isn't all that cold. That warm air aloft should help keep the instability less than it would be on other days that are this humid. Regardless to say, the Storm Prediction Center has us in their '5%' chance of tornadoes.

There are meteorologists, however, who do not like the SPC's % system. One of them is Accuweather Senior Meteorologist Henry Margusity, who I have mentioned many times. Over the summer, he developed a scale to better address the threats of severe thunderstorms. His scale goes from 1-4 and outlines specific threats for each category. You will likely have to click the image to read it, but here is a look at his system:


Henry has placed us in his T3 Category today mainly for the tornado threat. It will be interesting to see how this one unfolds. Stay tuned!

Sunday, June 29, 2008

Split Forecast Area

The grotonweather.com forecast area has been split by Severe Thunderstorm Watch 638. Cayuga County is under the watch, while Tompkins and Cortland got left out. In all honesty, however, that is just a technicality. Conditions are just as favorable for severe thunderstorms in Tompkins and Cortland Counties as they are in Cayuga...the SPC has to draw the line somewhere, however. I am expecting another watch to be issued later this afternoon that will include the rest of the area.




Numerous thunderstorms have developed over Western New York and Western Pennsylvania. These storms will track east, with damaging winds and hail the main threats. Other storms will develop as well, so it looks like we may have a decent severe weather event on our hands.

Sunday, June 22, 2008

Severe Thunderstorm Watch

Thunderstorms have begun to develop all across the Northeast and Ohio Valley, including Central and Western New York. This has prompted the Storm Prediction Center to issue a Severe Thunderstorm Watch for all of the counties shaded in blue below, including Tompkins County pretty much smack dab in the middle of the watch:



The probabilities with this watch indicate that the SPC is most concerned with hail, followed closely by damaging winds. The chances of 10 or more hail reports in the watch area is 70%, with a 50% chance of 10 or more hail reports.

Looking at the regional radar, you can see lots of thunderstorms scattered about the area. These will continue to develop, increasing in strength and coverage.
Stay tuned for any warnings!

Monday, June 16, 2008

Its going to be close

The severe weather threat is already ending up higher than I anticipated last night. For the second time in a week, the Storm Prediction Center has issued a Moderate Risk area for portions of the Northeast. At this time, we are just to the northwest of this area, with the boundary running from southwest to northeast through about Binghamton. Here are the hail (top) and wind (bottom) outlooks for today from the SPC. The hail one in particular has me concerned, since we are on the edge of the hatched area, which means a 10% or greater chance of hail over 2" in diameter.


8AM Edit: The visible image shows clearing skies behind this morning's area of rain. Since this satellite image was taken before the sun got very high in the sky, the dark area over Western New York is where the sun will be out. That was the key that was going to make or break us: sun. Yesterday, I wasn't calling for much if any sun. But now, things have changed.


I will continue to monitor this situation as it develops. Stay tuned for the latest! The next outlook from the SPC will come around 9:30, so check back closer to 10 for an update.

10AM Update: The newest SPC outlooks remain the same for our area. That keeps us right on the edge of the 30% wind and 30% hail lines, along with the edge of the hatched hail area.

Tuesday, June 10, 2008

A New Weather Watch

The Storm Prediction Center just issued a Severe Thunderstorm Watch for Central New York and points south until 10 PM. This watch replaces the tornado watch that has been in effect. This doesn't mean the tornado threat is totally gone, however. A lot of the severe weather composite index values that are used to predict severe weather show a semi-tornadic environment overhead. However, wind damage and hail will continue to be the main threats for the rest of the day.



Onto the radar now. As you can see, thunderstorms have again developed to our west into a bit of a broken line. Like this morning, these aren't severe. However, I expect these to strengthen as they head into the more favorable atmosphere sitting over us.




Stay tuned throughout the afternoon and evening as round 2 begins!

Not Done Yet

One round of severe storms has exited the region and pressed eastward. This line didn't look like it was going to do much for Tompkins, Cortland and Southern Cayuga counties, but right as it got here, it exploded rapidly. Just shows what a little bit extra heating and humidity can do for storms, as tempertures before the storms had reached into the mid 80's. These storms have caused quite a few hail and wind reports, as expected. Here is the storm report map as of 1:02PM.


Tempertures are back into the low 80's after about a 15 degree drop with those storms. That means we are certainly still have fuel to work with for the rest of the day. Thunderstorms are also now starting to develop well to our west along the cold front in Ohio. They haven't been going for long, but are already looking strong and developing into a line. This is what I have expected to happen, so everything still looks favorable for another, possibly more intense, line of storms later this evening.


In between then and now, additional storms are possible, also with damaging winds and hail. I'll continue to update through the day, so stay tuned!

TORNADO WATCH ISSUED

Tompkins County, along with all of Central and Eastern New York is now under a TORNADO WATCH until 6PM tonight!


A little known fact about watches is that they each have probablities of certain severe weather events occuring. For this watch, there is over a 95% chance of 10 or more wind damage reports, as well as over a 95% chance of 10 or more hail reports and a 40% chance of 2 or more tornado reports. That means the main threat is still damaging winds, but tornadoes are becoming an increasing threat.

An update on that line of storms: The northern portion appears to be the stronger part, with numerous warnings now in effect. Stay tuned for more updates on these storms.



Also, the National Weather Service confirmed my belief about multiple lines of storms today when they issued this statement at 10:05AM:

... Severe thunderstorms are expected across the region today...

An initial line of thunderstorms will cross The Finger lakes
region... the twin tiers... the Mohawk Valley... and the southern Tug
Hill region this morning... generally between 930 am and 12 noon.
This includes Elmira... Corning... Syracuse... Utica... Binghamton...
and Montrose. Localized strong damaging winds and hail are
possible late this morning.

This afternoon... another round of thunderstorms is anticipated.
Additional lines of storms are expected to cross the area... generally
between 2 and 6 PM. Once again... strong winds and hail are the
primary threats.

Stay tuned to NOAA Weather Radio... or local media outlets... for the
latest updates. Watches and/or warnings may well be issued later
today.

MOD. RISK!

A very serious situation is unfolding today for our area, with the Storm Prediction Center placing us under a MODERATE RISK zone. To put this in perspective as to how rare this type of severe weather outlook is for our area, I can only remember 1 other time during the lifetime of grotonweather.com that we have been under a moderate risk, and NEVER have we been under one to start the day! I do have to say, however, that I was thinking last night that this would happen. Here are the areas under the moderate risk (pink in the top image) because of the wind threat (red in the bottom image).


As I have been indicating the past 24 hours, everything is coming together for a major severe weather outbreak. Hot, humid air is and has been in place. This will interact with a cold front and trough of low pressure that will progress eastward through the day. The final piece to the puzzle will be the strong jet stream winds. The thunderstorms that explode later this morning across Western and Central New York will be able to tap into these winds. Winds in some of the storms today could exceed 70, even 80 or 90 mph. The tornado threat is a tad higher than I thought last night as well. I will be updating throughout the day, so make sure to stay tuned here for the most up-to-date, in depth forecasts and outlooks you will find on the web for this area!

(Your normal forecast will be coming by 8AM. To find the forecast, hover over the "Grotonweather" tab in the menu above, then click the "Homepage" link!)

Monday, May 26, 2008

Memorial Day Storms

The new website isn't quite ready to be launched yet, but there is some important weather to talk about today.

There are some clouds moving through this morning along a warm front. This front will bring us some real summer like weather for the rest of the day. Heat and humidity will move in this afternoon. Highs should end up in the mid 80's with dew points in the mid 60's making for a rather sultry day compared to the weather we have been having. As this front passes through, there could be a shower or thunderstorm.

However, later in the evening, say after 4pm, there will be another chance for thunderstorms to develop in the warm, moist atmosphere. These are the storms that have prompted the Storm Prediction Center in Norman, Oklahoma to put us in a "slight" risk for severe thunderstorms. The main threats from these storms will likely be damaging winds, hail, frequent lightning and flash flooding, though an isolated weak tornado can't be ruled out.

These storms will be forming in the "warm sector" well ahead of a cold front. That front will move through overnight and early tomorrow morning, likely with another batch of showers and thunderstorms. However, the most likely time for severe storms will run from roughly 4pm-midnight tonight. Stay tuned for updates through the evening for storms that become severe! And hopefully I will get the new site up by this evening as well!