Warm Frontal Passage This Morning

A warn front will lift north this morning bringing a brief downpour around 11 AM-Noon for South Central MA.   Behind this rain shower dew points are in the upper 60's and temperatures are in the mid to upper 80's.  Cloud cover should keep temps in the lower 80's in Central MA but any breaks of sun will feature a sharp uptick in temps.  Here is the 1004 AM radar image for Southern New England
RadarScope 1004 AM Boston Radar

Here is the surface map as of 8 AM which shows our warm front.
WPC Surface Analysis 8 AM 
Future radar shows the showers entering Worcester County at 11 AM
13z HRRR simulated radar 11 AM (image Weatherbell)
And they are exiting by 12
13z HRRR Simulated radar 12 PM (image Weatherbell)
Temperatures from 1-3 will be near 80 in Worcester County and Eastern MA but near 90 in Western MA and CT.  It will be steamy as 3 PM dew points are near 70.
13z HRRR 2 m dew points 3 PM (image Weatherbell)
Temperatures will spike in Southern Worcester County by 5 PM into the mid 80's.  Heat index at that hour will be in the low 90's.
13z HRRR 5 PM Heat Index (image Weatherbell)
Certainly not a terrible Saturday but the brief rain and humidity will make it uncomfortable at times.  A cold front will pass tomorrow AM triggering another round of showers but it will kick out the humidity.   Pleasant September weather is on tap for Monday and Tuesday.  I'll post tomorrow.

Cheers,
Zack Green

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