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Chilly weather soon - first frost dates!

Chilly weather soon - first frost dates!

by Ben Pine

Posted on October 15, 2013 at 5:39 AM

Big, cool changes on the way!  Take a look at the maps below showing the chilliest weather we've seen since April.

The first map is the NAM weather model with temperatures in the 50s for much of the day Thursday.  The next map is featuring lots of blue indicating lows in the 40s.  The third map shows the reason for the chilly changes - a big dive in the jet stream through the eastern US.   Finally, the 7day forecast showing highs only in the 50s and 60s through the weekend with lows in the 40s!

This cool spells follows along with our average first frost dates.  Over the years, on average our first frosts have occurred between October 20-25th - which is next week!  Autumn is about to head to a new level of cool! 

The cool air arrives behind a cold front which brings us rain tonight through tomorrow morning. 

At the bottom, you find our average first frost and freeze dates.



Averages, using the entire period of record:
Last spring frost (36°):  April 18
Last spring freeze (32°):  April 5
Last spring hard freeze (28°):  March 24
First fall frost (36°):  October 20
First fall freeze (32°):  November 1
First fall hard freeze (28°):  November 12

Normals, 1981-2010:
Last spring frost (36°):  April 14
Last spring freeze (32°):  April 3
Last spring hard freeze (28°):  March 23
First fall frost (36°):  October 25
First fall freeze (32°):  November 4
First fall hard freeze (28°):  November 16