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Weekly Iowa Weather Report, November 20, 2016

The exceptionally mild run of late autumn weather finally came to an end with a strong cold front moving across the state on Friday. A storm system associated with the frontal passage brought the first accumulating snow of the season to the far northwest corner of Iowa on Friday with 4.5 inches of snow reported near Lester in Lyon County and 3.5 inches at Sioux Center.
Measurable rainfall was limited to portions of the northwest one-half of the state with amounts mostly under one-tenth of an inch although the moisture equivalent of the snowfall was a quarter-inch or greater along and northwest of a Sioux City to Estherville line. No measurable precipitation fell across the southeast one-half of the state. The statewide average precipitation was only 0.05 inches while normal for the week is 0.48 inches.
Temperatures were far above normal from Monday through Thursday with the highest temperatures occurring on Thursday when Ottumwa, Donnellson and Mount Pleasant reached 77 degrees. Mild weather held on into late Friday morning over eastern Iowa with temperatures in the sixties. The coldest weather so far this season prevailed over the weekend with daytime highs reaching only 26 degrees on Saturday at Rock Rapids and Sibley while Rock Rapids reported a Sunday morning low of 13 degrees. The cold weather finally broke a string of 28 consecutive days with above normal statewide average temperatures. Temperatures for the week as a whole averaged 7.3 degrees above normal
Source:   Harry Hillaker, State Climatologist, Iowa Department of Agriculture & Land Stewardship

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