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Low topped thunderstorm potential 1/10/16


weatherwiz

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A highly unseasonable warm/moist airmass will surge into southern New England on Sunday as an area of low pressure tracking well to the west will allow for a warm front to slowly push through the region.  South of the warm front temperatures will climb well into the 50's with dewpoints not too far behind!  

 

As typical with storm systems this time of year we will be dealing with some pretty impressive dynamics aloft with computer forecast models showing a MLJ streak of about 80 knots arriving into the region from the SW during the early afternoon hours of Sunday.  This will set the stage for a period of rather intense mid-level lifting.  

 

500mb%20winds_zpsjynusgpl.jpg

 

The biggest question is how much instability will we be able to generate?  Computer forecast models all suggest a surge of some weak elevated/sfc instability arriving south of the warm front with LI values nearing 0, TT's nearing 50, and the SI nearing 0.  The NAM even has some MUcape moving overhead as well.

 

MUcape_zpswo72r5bl.jpg

 

Outside of some torrential downpours (with some areas perhaps getting 2-3'' of rain), there will be potential for some thunder/lighting and perhaps some gusty winds drawn down depending on the degree of instability that can move in.

 

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Noyes has 55-60 mph gusts Sunday lol

 

There is actually a very small window where someone could see gusts as strong.  The degree of WAA within the warm sector is quite impressive for this time of the year.  Typically we don't see such strong WAA occurring all the way down to the sfc but in this case we are and this is helping to limit any inversion.  In fact, we may only be dealing with a subtle inversion.  Even a subtle inversion, however, will prevent much of the winds from mixing down but any convective elements get involved and its a different story.  

 

Late overnight Sunday/Monday looks pretty gusty.

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We aren't really looking at anything crazy wind wise...most gusts probably in the 35-45 mpg range at most.  There could be a few gusts in the 50-60 mph range if any convective elements get involved.  Only way we would see anything higher than 60 mph gusts is if we were to get some stronger convection.  At this time it doesn't look like we'll see sufficient enough instability to get convection that strong but sometimes we see a strong cell or two impact the south coast so maybe someone there can get lucky.  

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