Widespread Freeze Saturday AM

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By Quincy Vagell on October 10, 2012, 4:00pm

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A widespread freeze with temperatures at or below freezing is likely Saturday AM.

As high pressure ushers in chilly air from Canada, the stage is set for some frosty conditions later Friday night and into Saturday morning. Those with any plants outside should be prepared for a hard freeze, especially across inland Connecticut. The shoreline may escape the worst, but even frost conditions are expected in some coastal areas.

Clearing skies and light winds will make for very chilly temperatures Friday night. By Saturday morning, most of Connecticut should be below freezing.
Northern Connecticut could dip into the mid-20s as excellent radiational cooling is expected.
Even the shoreline could have a few towns fall into the lower 30's.

The record low of 28 at Bradley Airport (1981, other years) could definitely be broken.
The record low of 34 at Bridgeport may be a bit harder to break, but it get get close to being broken. 

MOS has been trending cooler and cooler as it now has inland Connecticut falling into the upper 20's and lower 30's. Even the GFS MOS brings Danbury down to 27 degrees. The cold air aloft is some of the coldest air we have seen in quite some time. 850mb temperatures on all models fall to between -4 and -6C by Saturday morning.
For the shoreline, models generally have mid to upper 30's, but both the GFS and MET MOS now brings Groton down to 33 degrees. Keep in mind that temperatures might verify even cooler than the MOS, if current trends continue.

The below panels from the 12z NAM shows the setup very nicely.
Upper left: Dew-points in the 20's indicates dry air and the potential for excellent radiational cooling. With winds (upper right) light, this should also help temperatures take a tumble. Perhaps the biggest signal for a freeze would be the position of high pressure directly overhead and 850mb temperatures around -5C.

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Quincy Vagell

Town: Marlborough, CT  

Reporting for WXedge since January 2012.

Articles: 1305

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