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Northeast Severe Weather Alert

by Weatherboy Team Meteorologist - May 4, 2018

The Convective Outlook from the NWS Storm Prediction Center shows a higher than usual threat level of severe weather in the northeast today. Image: weatherboy.com
The Convective Outlook from the NWS Storm Prediction Center shows a higher than usual threat level of severe weather in the northeast today. Image: weatherboy.com

While this set-up is more common in the middle of July rather than the middle of May, it isn’t completely out of the norm: a strong frontal system is moving into a summer-like airmass in the northeast, setting off a round of severe and potentially violent weather. In the latest National Weather Service Storm Prediction Center Convective Outlook, meteorologists there believe there is an enhanced risk of severe storms across much of New York, Vermont, and northern New Hampshire.


Unusually high risk of tornadoes in northern interior New England today, based on NWS Storm Prediction Center data. Image: NWS/SPC
Unusually high risk of tornadoes in northern interior New England today, based on NWS Storm Prediction Center data. Image: NWS/SPC

In addition to the threat of severe thunderstorms, there’s also an enhanced threat for tornadic storms across northern New England. There is a 10% probability of tornadoes over northern New York, Vermont, and New Hampshire, which represents a probability many times higher than normal.  According to the Storm Prediction Center, this is the first 10% tornado forecast to include any part of New Hampshire or Vermont since a Moderate Risk on  September 8, 2012. Other  10% tornado risks since 2010 include May 26, 2011 and June 6, 2010.

Strong to severe storms are possible as far south as Delaware, Maryland, and Virginia this evening as the frontal system moves through. The National Weather Service has raised Tornado Watches and Severe Thunderstorm Watches for portions of the northeast; these may expand south and east this evening as the front moves through. People in the watch areas should be ready to take immediate action should a Severe Thunderstorm Warning or Tornado Warning be issued for this area.

Once the front exits the region, fair, dry, and cooler air will return. However, in places like New Jersey, while it will be noticeably colder than today, it will still be about 5 degrees above normal for this time of year.

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