Thursday, April 23, 2009

Record Heat Moves Eastward
Records Set in Iowa, South Dakota

Image (click to enlarge): Surface temperature at 1 pm CDT from Unisys

11 pm CDT Update: Official National Weather Service record reports:
AT 538 PM CDT...THE TEMPERATURE AT MITCHELL SOUTH DAKOTA PEAKED AT
92 DEGREES. THIS TIED THE RECORD SET BACK IN 1939.

THROUGH 552 PM CDT...THE TEMPERATURE AT SIOUX FALLS SOUTH DAKOTA
HELD AT 91 DEGREES. THIS SMASHED THE OLD RECORD HIGH OF 87...SET
BACK IN 1939.

THROUGH 547 PM CDT...THE TEMPERATURE AT HURON SOUTH DAKOTA HELD AT
91 DEGREES. THIS BROKE THE RECORD HIGH OF 89...SET IN 1990.

AT 538 PM CDT...THE TEMPERATURE AT MITCHELL SOUTH DAKOTA PEAKED AT
92 DEGREES. THIS TIED THE RECORD HIGH OF 92...SET BACK IN 1939.

AT 420 PM CDT...THE TEMPERATURE AT YANKTON SOUTH DAKOTA WAS HOLDING
AT 90 DEGREES. THIS BROKE THE PREVIOUS RECORD OF 88...SET IN 1990.

AT 330 PM CDT...THE TEMPERATURE AT BROOKINGS SOUTH DAKOTA REACHED 88
DEGREES. THIS EXCEEDED THE RECORD OF 86...SET BACK IN 1962.

THE HIGH TEMPERATURE AT ACADEMY SOUTH DAKOTA THIS AFTERNOON WAS 95
DEGREES. THIS BROKE THE RECORD OF 92...SET IN 1990.

THE HIGH TEMPERATURE AT MENNO SOUTH DAKOTA THIS AFTERNOON WAS 92
DEGREES. THIS TIED THE RECORD OF 92...SET BACK IN 1939.

AT 346 PM CDT...THE TEMPERATURE AT SIOUX CITY IOWA PEAKED AT 92
DEGREES. THIS SMASHED THE OLD RECORD OF 87...SET BACK IN 1939.

AT 338 PM CDT...THE TEMPERATURE AT SIOUX CENTER IOWA WAS HOLDING AT
89 DEGREES. THIS TIED THE RECORD OF 89...SET IN 1990.

AT 325 PM CDT...THE TEMPERATURE AT SPENCER IOWA PEAKED AT 86 DEGREES.
THIS BROKE THE PREVIOUS RECORD OF 84...SET IN 1990.

A RECORD HIGH TEMPERATURE OF 90 DEGREES WAS SET AT ABERDEEN SD TODAY.
THIS BREAKS THE OLD RECORD OF 87 SET IN 1994.

A RECORD HIGH TEMPERATURE OF 89 DEGREES WAS SET AT MOBRIDGE SD TODAY.
THIS BREAKS THE OLD RECORD OF 87 SET IN 1990.

A RECORD HIGH TEMPERATURE OF 88 DEGREES WAS SET AT PIERRE SD TODAY.
THIS BREAKS THE OLD RECORD OF 87 SET IN 1990.

4 pm CDT Update: Records continue to fall:
Huron       90
Sioux Falls 91

PM Update: As of 3 pm CDT, records continue to be tied or broken in the upper Midwest. Here are some current readings, along with the old records for the date:
Location     3 pm CDT  Old record Year
South Dakota
Huron 89 89 1990
Sioux Falls 89 87 1939
Minnesota
Marshall 90 90 1960
Worthington 86 86 1980
Iowa
Sioux City 90 87 1939
Spencer 87 84 1990

Original post:
As the record heat wave in California has subsided, record heat is now moving eastward into the Midwest. By 1 pm CDT, a brisk southerly wind brought the temperature at Sioux City, Iowa to 87°, tying the record set in 1939. In nearby southeastern South Dakota, Sioux Falls at 86° was 1° below its record high for the date. Spencer, Iowa's reading of 85° had already surpassed its 1990 record by 1°.

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