A Dry and Warm Late Autumn of 1999
The autumn of 1999 brought record warm temperatures and unusually dry conditions to much of Minnesota. Some interesting artifacts of this warmth and dryness can be seen with a look at Twin Cities temperature and precipitation statistics.
Days without below zero temperatures in the Twin Cities
Twin Cities temperatures stayed
above zero from January 20, 1999 through December 19,
1999. This is a total of 334 days and ties 1998 for 3rd
place in the modern record.
Days with above-freezing maximum temperatures in the Twin Cities
The Twin Cities broke a record for
the longest consecutive stretch of maximum temperatures
above 32 degrees. The maximum temperature was above 32
degrees from March 10 until December 16, 1999. The
average consecutive days of above freezing maximum
temperatures is 229. The shortest span of days with above
freezing maximum temperatures was 164 days from May 1 to
Oct 11 1909.
Days with minimum temperatures => 20 degrees in the Twin Cities
Still another record was set in the Twin Cites in 1999 when the minimum temperature did not drop below 20 degrees until December 15th. This easily bested the old record of December 3rd set back in 1899.
Lack of snowfall in the Twin Cities
It was also unusually snow-free this late autumn across Minnesota. The Twin Cities didn't see the first 1 inch of snow cover until December 20. The dates without snow cover were March 17, 1999 through December 19, 1999, the second longest stretch on record. The top five longest stretches without a one inch snow depth are listed below. While the autumn of 1999 lacked snow, there are other years that saw even later first 1-inch snowfalls. 1999 tied 1939 for 8th latest 1 inch snowfall, and tied with 1914 for the latest 1-inch snow depth.
Longest stretch of days without snow cover (<1 inch)
1) March 16, 1918 December 26, 1918
Latest 1 inch snowfall (season) (From 1891-1997)
1) Jan 9, 1945 (44-45)
Latest 1 inch snow depth (season)* (From 1896-1997)
1) Jan 1, 1914 (13-14)