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Iowa Preliminary Weather Summary
By: Dr. Justin Glisan, State Climatologist - 11/14/2018

Iowa experienced an unseasonably cold week with the statewide average temperature almost 10 degrees below normal. Portions of northern and eastern Iowa observed wetter than normal conditions with southern Iowa generally drier than expected. The statewide average precipitation was 0.49 inches, just below the week's normal of 0.51 inches. A low pressure system tracked northeast through Iowa on Monday (5th) bringing statewide measurable rainfall. Many stations across northern Iowa received accumulations between 0.25 and 0.50 inches; Fort Dodge (Webster County) reported a 24-hour measurement of 0.74 inches. Daytime highs were generally in the mid-40s with cloud cover keeping overnight lows in the upper 30s and 40s. Showers lingered across northeastern Iowa into Tuesday (7th); rainfall totals topped out at 0.10 inches. Wednesday was relatively quiet with cloudy skies and highs in the mid-30s.

Measurable snow fell across portions of Iowa late Thursday (8th) into Friday (9th). Accumulations averaged between 1 to 2 inches; Donnellson (Lee County) observed 2.4 inches. High temperatures plunged into the upper teens in the northwest to upper 20s in the southeast. Dubuque (Dubuque County) observed a 28 degree high, breaking the record cold high of 32 degrees set in 1973. Overnight lows fell into the single digits, averaging 16 to 20 degrees below normal, breaking records in some locations; Lamoni (Decatur County) and Ottumwa (Wapello County) observed lows of nine degrees, breaking two 1926 records of 11 and 15 degrees, respectively. Saturday (10th) was chilly with highs in the mid to upper 20s. Overnight lows Sunday (11th) again fell into the single digits. Measurable precipitation was not reported over the weekend. Fort Madison (Davis County) observed the week's high of 51 degrees on the 5th, 4.7 degrees below average. Estherville (Emmet County) reported the week's low of two degrees on the 10th, 24 degrees below normal.


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