Regional Outbreaks of Severe Weather Through Early Next Week; Early Season Heat Wave across the South

Active spring pattern across the center of our nation with several episodes of severe weather and heavy rainfall expected into next week. The potential for very large hail, long track tornadoes, severe wind gusts, frequent cloud to ground lightning strikes and flash flooding are in the outlook. Furthermore, dangerous early season heat wave continues for the Gulf Coast states into early next week. Read More >

The Arctic Outbreak of February 1-4, 1996

From February 1-4, 1996, arctic temperatures overspread the Upper Mississippi River Valley (Table 1). The culprit was a frigid airmass which moved into the region in late January. With clear skies at night, temperatures plummeted into the 30s below zero over much of the area. This blast of arctic air set all-time record low temperatures for Iowa, Minnesota, and Wisconsin: Elkader, IA (tied the record at -47 on the 3rd); Courderay, WI (-55 on the 4th); and Tower, MN (-60 on the 4th).

The average four-day temperature in Wisconsin during the cold wave was -18.3 degrees, with an even colder -23.6 degree average in Minnesota. In Rochester, MN, temperatures stayed below zero from the morning of the 29th until midnight on the 5th (Fig. 1).

Location	2/1/1996	2/2/1996	2/3/1996	2/4/1996
Location	High / Low	High / Low	High / Low	High / Low
Charles City, IA	-5 / -23*	-12* / -32*	-13* / -30*	0 / -25*
Decorah, IA	-5 / -25	-13* / -34	-13* / -41*	1 / -36*
Elkader, IA	-5 / -23	-5* / -32	-13* / -47*	0 / -38*
Oelwein, IA	-11* / -28*	-20* / -31*	-15* / -32*	-1 / -22*
Austin, MN	-13* / -28	-19* / -34*	-15* / -31*	0 / -25*
Rochester, MN	-13* / -27	-20* / -35*	-15* / -30	1 / -24
Winona, MN	-4* / -20	-16* / -31*	-11* / -31*	4 / -31*
La Crosse, WI	-8 / -26	-13* / -34*	-9 / -36*	0 / -31*
Prairie Du Chien, WI	-1* / -17	-8* / -29	-11* / -36*	0 / -31*
Medford, WI	-12* / -35*	-5 / -37*	-19* / -37*	-12* / -37*

Table 1. Listing of high and low temperatures (F) for February 1-4, 1996. The * denotes a record temperature.

Fig 1. Temperature trace (F) for Rochester, MN.

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