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!

What happened...or rather, why it didn't

I've done some thinking and analyzing this morning, and I think I know where I went wrong with my forecasts last night. Lets start by looking at the last radar image I posted.



As you can see by the radar loop from last night, the snow developed mostly over Western Pennsylvania, West Virgina, and Eastern Kentucky, with lake snows further northwest over Ohio, Indiana and Illinois. Now we did and are still getting the lake enhanced snow, but the other area of snow never formed. Why? The answer lies in the two images I made below:





The area where the snow broke out was just west of and along the spine of the Appalachian mountains. These mountains acted as a lifting mechanism. As the winds hit the mountains, they had no where to go but up. Rising air cools, and with all the moisture left over from the storm, condensed into clouds and moderate to heavy snow. This is called upslope snow. Since there is not nearly the elevation gradient over our area as there is to the south, there was not enough lift to cause a secondary outbreak outside of the light lake effect. This just goes to show that there are so many factors that go into forecasting, which is why it is such a tough job.

And just in case you were wondering how much snow fell as a result of the upslope effect last night in the mountains, Accuweather.com meteorologist Jesse Ferrell put together a small list of some totals on his blog, which you can see here.

One other note about this storm. I have had over 800 hits on my website since Monday, including 571 yesterday! I just wanted to thank all of you for using my site and making it well worth my time. I really enjoy this and I am so happy that you are finding it useful! Thank you again!

Now, one final thing for now. For the past month or so, I have been working on a new website with a group of meteorology students here at SUNY Oswego. This site will give weather forecasts in a similar format to grotonweather.com for clusters of 2-5 counties. This will be a great source for specific weather information outside of our area. I am both the chief meteorologist of this new site, along with the forecaster for the Finger Lakes region. I have set this site up so that Tompkins, Cortland and Southern Cayuga are in a cluster. What does this mean for the future of grotonweather.com? No changes! I simply using grotonweather.com for that region, keeping everything the same for you. This new site will be launching this weekend and will have the URL www.empirestateweather.com, so check it out come Saturday!

Wasting no time!

Well, the first storm has pulled off and accelerated, meaning even the far eastern reaches of New England are mostly precipitation free. I recorded 6.4" here at my house...if you have any measurements, feel free to send them in!

Now, its already time to focus on the next storm. The National Weather Service didn't give us much of a break and has already issued a Winter Storm Watch. Piecing together what this says and what Henry Margusity of accuweather.com has been saying, I think our chances for a foot or more are pretty decent. I will issue a map for the entire East Coast sometime tomorrow and will likely go into "storm mode" Saturday afternoon. The snow should start sometime Saturday evening or Saturday night and last into Sunday night. Keep checking back for updates as things come together!

Awesome Satellite!

Before I get to the point of this post, I would like to recap Friday's Severe weather..and why we didn't get any. If you recall, I was quite excited before hand about the potential for some major severe weather. However, there were too many clouds and too much rain to allow for things to fire up. By early afternoon, I had narrowed my prediction to roughly 15-20 storm reports across the whole Northeast and Mid-Atlantic. Here is the storm report map from Friday so you can't say I totally messed up the forecast! *laughs*



Now, onto the point of this post. I was looking at some satellites imagery today and I zoomed in on Southern California, which has been in the news with winds over 100mph and massive forest fires. You can clearly pick out the smoke from the fires blowing out over the Pacific Ocean. I haven't figured out how to get it to loop on here yet...if I don't figure it out and you want to see it, let me know and I can send the loop to you!


Now, it seems we hear about high winds and fires in southern California every year around this time. Often times, the media blames the "Santa Ana" Winds, and rightly so. But what are they and why are they so destructive? Accuweather does an excellent job explaining this phenomena. I would simply link to the story, but since it is one of their headline stories, the article will likely no longer be available in the next day or two. So, here is a screen shot of the article, courtesy of Accuweather (click to enlarge!):