Widespread Hard Freeze

The first widespread hard freeze of the season occurred across the Tri-State area this morning, with cooperative observers and automated weather stations reporting temperatures in the middle to upper 20s.  This effectively ends the growing season for 2006.  Minimum temperatures have been close to freezing on a number of occasions during the past few weeks, and most areas had already experienced frost with overnight lows in the lower 30s.

This morning’s hard freeze occurred a bit later than the 30-year average for most observing sites.  The average first date of freezing temperatures in the fall (defined here as 28 degrees) occurs on September 29 in Atwood and September 27 in Flager and Wray Colorado.  In other areas the normal date occurs during the first 10 days of October.  Goodland’s average date of first fall freeze is October 6, while it is October 10 in Benkelman and Trenton, Nebraska.

The map below shows minimum temperatures observed from our cooperative observers.

Freeze Map

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