Terrys Take: Just when you think you’ve seen it all!
I’ve seen a thing or two in my days in weather but nothing beats the last 2 weeks for extreme weather. I’ve lived in Iowa for 57 years and had never seen a foot of snow in May. Not even close! Now, less than 2 weeks later, a 106 degree day on May 14th at Sioux City, Iowa! That is more than my meager brain can comprehend. I can’t even begin to tell you how off the charts that is. I’m not even sure which is more impressive, the heat or the snow. Since we’ve had a chance to digest the snow I guess I’ll focus on the heat. First, a special weather statement on the Sioux City record of 106…..
RECORD EVENT REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
205 PM CDT TUE MAY 14 2013
RECORD DAILY AND MONTHLY MAXIMUM TEMPERATURE SET AT SIOUX CITY IA.
AT 135 PM THE TEMPERATURE REACHED 106 DEGREES AT THE SIOUX CITY GATEWAY AIRPORT ESTABLISHING A NEW RECORD DAILY MAXIMUM TEMPERATURE FOR THIS DATE AND A NEW RECORD FOR THE HIGHEST TEMPERATURE FOR THE MONTH OF MAY.
THE PREVIOUS RECORD DAILY MAXIMUM TEMPERATURE WAS 97 DEGREES SET IN 2001 AND THE PREVIOUS RECORD MONTHLY MAXIMUM TEMPERATURE FOR MAY WAS 105 DEGREES SET ON MAY 30, 1934. THE TOP TEN HIGHEST TEMPERATURES FOR THE MONTH OF MAY FROM 1889 TO 2013
1. 105 5/30/1934
2. 103 5/29/1934
3. 102 5/25/1967
4. 102 5/31/1934
5. 101 5/15/2001
6. 100 5/06/1934
7. 99 5/19/1934
8. 99 5/18/1934
9. 98 5/28/2006
10. 98 5/24/1939
Here’s another statement from the NWS in Minneapolis where they set a record high of 98. Even more impressive, Albert Lee and some other stations hit or exceeded 100….
THE MINNESOTA STATEWIDE TEMPERATURE RECORD FOR MAY 14TH WAS BROKEN TUESDAY. THE PREVIOUS RECORD OF 99 DEGREES OCCURRED IN MILAN (1932 & 2001) AND REDWOOD FALLS (1932). NUMEROUS SITES ACROSS SOUTHERN MINNESOTA TIED OR EXCEEDED THE PREVIOUS RECORD. THE NEW OFFICIAL RECORD VALUE WILL BE DETERMINED IN THE COMING DAYS ONCE WE SORT THROUGH ALL THE DATA FROM THE AUTOMATED STATIONS AND THE COOPERATIVE WEATHER OBSERVATION SITES.
By the way, the Quad Cities hit 90 which is the first occurrence of a 90 degree day here this year. We fell 3 degrees short of a record.
One of the critical ingredients in the heat was dry air and strong compressional heating. 850 temps of +27 capped the atmosphere and decent mixing brought the heat to the surface. With humidity levels of 5-10 percent in NW Iowa, as low as I’ve ever seen in May, the air flash fried and surged more than 30 degrees above norms which are in the low 70s. Things have to really come together just right for something as strange as this. I suspect I’ll be long gone and playing a harp before this ever happens again.
A weak front is due later tonight and that will bring temps back to more manageable levels the next few days. However, readings will remain very warm into the weekend and moisture will increase raising humidity levels. With the front meandering around scattered t/storms will become more numerous later in the week and into the weekend. Some could become strong with locally heavy rain. SPC has a severe risk Sunday and that may go into Monday.