Cold Start to 2010

Angie Enyedi, NWS Jacksonville

An extended period of near and sub-freezing temperatures is expected across the Jacksonville county warning area this week.  A strong continental polar airmass over Canada will funnel into the Deep South on the eastside of a persistent surface ridge (Figure 1, cP image; Figure 2, MSL).  An omega blocking pattern in the upper levels of the atmosphere will also continue a cold and dry northwest flow over the local area through much of the upcoming week (Figure 3, 500 mb heights).

The table below identifies various climate data sites throughout our area of responsibility, and gives the most number of consecutive days at or below freezing (32 ° F) as well as the most number of consecutive days at or below hard freeze temperatures (27 ° F) at each site.


Site Max # of Consecutive Days
Min Temp 32 °F or less (Freeze)
Max # of Consecutive Days
Min Temp 27 °F or less (Hard Freeze)
Jacksonville, FL 8 days
ending on 1/24/1977 & 12/23/1901
7 days
ending on 1/5/2001
Gainesville, FL 9 days
ending on 12/24/1960
6 days
ending on 1/5/2007, 1/26/1960 & 12/28/1906
Alma, GA 11 days
ending on 12/26/1960 & 1/12/1958
7 days
ending on 1/5/2001, 2/22/1958 & 11/30/1950
St. Simons Island, GA 8 days
ending on 1/5/2001
5 days
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