Todays Weather Headlines:
Record Heat Today - Heat Index Will Reach 100.
Tstorms Wed and Thurs - Possible Severe Weather Wed Evening.
Showers will linger into Saturday - Much Cooler Weekend.
Much Drier and Cooler Pattern after the 15th.
Today 10th: Dry/Breezy - Temp 90 - Then Overnite Showers.
Wed and Thurs 11th/12th: Tstorms (Some Severe Possible - 1+ Inch Rain) - Temps 83/75.
Fri and Sat 13th/14th: Isolated Showers/Breezy - Temps Low 60's.
Sun and Mon 15th/16th: Isolated Showers Sun Morning - then Dry - Temps High 60's.
Tues thru Thurs 17th-19th: Dry - Windy Wed/Thurs - Low 70's.
Fri and Sat 20th/21st: Isolated Showers.
Sun thru Wed 22nd-25th: Dry.
PRELIMINARY WEATHER SUMMARY – APRIL 2011
General Summary. Iowa temperatures averaged 48.2° or 0.3° below normal while precipitation totaled 3.83 inches or 0.50 inches above normal.
Temperatures. The first two weeks of the month averaged 6.5 degrees above normal with temperatures soaring to 89° at Osceola on the 3rd, 87° at Shenandoah on the 9th and 90° at Des Moines on the 10th. However, the next two weeks averaged 7.1° below normal and saw no readings exceed 77°. Atlantic reported the lowest temperature of the month with a 19° reading on the morning of the 5th. However, late month temperatures fell to 24° at Sheldon on the 24th and 25° at Waterloo on the 29th.
Precipitation. Precipitation was evenly distributed throughout the month and across the state. Monthly totals varied from 2.59 inches at Carroll to 5.61 inches at Cascade. It was warmer and Relatively dry from the 8th through the 14th - Widespread rain fell on the 15th, followed by frequent rain and persistent cool weather. Snow was reported on twelve days during the month with by far the greatest accumulations coming on the 19th when several inches fell over the northern one-third of Iowa. Dorchester reported the most snow with this storm with 6.5 inches. Overall this was the most widespread snowfall Iowa has seen for so late in the season since April 20-21, 1992.
Severe Weather. There were two outbreaks of severe weather in Iowa during April. The first event on the evening of the 3rd, produced reports of large hail from 16 counties, mostly in east central Iowa, with hail up to three inches in diameter in Dubuque. The second event came on the evening of the 9th with the National Weather Service reporting at least 15 tornadoes over northwestern Iowa (along a line from Mapleton to near Algona). Many of these tornadoes were very strong ones with four rated EF-3 with one resulting in considerable damage in Mapleton. The severe weather season, as is often the case following mature La Nina events, has been a very active one in Iowa and points to the south and east with the same general weather pattern of colder than usual weather to the north and warmer than normal to the south.
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