Weekend Frost

Average last frost dates vary by nearly 3 weeks in North Dakota, but most locations the average is somewhere near May 8-15.  Meaning, frost isn’t at all unusual this time of year.  Yet, because planting was done earlier than average, crops have emerged in some locations, meaning, a frost this time of year has the potential for more damage than is often the case in the middle of May.  Not only was frost reported in some areas this morning…

 

May 12, 2016 Minimum Air Temperatures
May 12, 2016 Minimum Air Temperatures

…but the next three mornings there will also likely record temperatures near or below 32°.  The coldest morning may be Saturday in many area.  Official temperatures are taken at approximately 5 feet above the ground, meaning, temperature near the soil are usually even colder.  So if you hear the temperature is say 36°, you can still often observe frost on the ground.

Daryl Ritchison