Mid-April Heat Wave
April 15-16, 2002

Not to be redundant, but this particular warm spell is historical in nature based on climatology:

  • April 15th ... highest temperature ever measured in Minnesota for the date -  93 F measured at Faribault
  • April 15th ... earliest ever 90 F tempeatures for the state of Minnesota
  • April 15th ... Twin Cities reading of 91 F is the earliest 90 F or higher temperature ever in the spring
  • April 15th ... Twin Cities dew point of 61 F ties the record for the date
  • April 16th ... Twin Cities dew point of 62 F ties the record for the date
Over three dozen communities around the region reported preliminary record high temperatures on Tax Filing Day ... April 15, 2002 ... including:
Sioux_Falls, SD    96 F    Sioux_City, IA   96 F    Faribault, MN   93 F
Waseca, MN         92 F    Lamberton, MN    92 F    Eau_Claire, WI  91 F
Yankton, SD        91 F    Jackson, MN      91 F    Twin_Cities, MN 91 F
Redwood_Falls, MN  91 F    Farimont, MN     91 F    Mankato, MN     91 F
New_Ulm, MN        91 F    Red_Wing, MN     91 F    St_James, MN    91 F
Estherville, IA    91 F    Mason_City, IA   91 F    Decorah, IA     91 F
Spencer, IA        91 F    La_Crosse, WI    90 F    Worthington, MN 90 F
Windom, MN         90 F    Austin, MN       90 F    Winona, MN      90 F
Albert_Lea, MN     90 F    Cambridge, MN    90 F    Hutchinson, MN  90 F
Owatonna, MN       90 F    Marshall, MN     88 F    Madison, WI     87 F
Vermillion, SD     87 F    Des_Moines, IA   87 F    St_Cloud, MN    84 F
Litchfield, MN     84 F    Mora, MN         84 F    Brainerd, MN    84 F
Little_Falls, MN   82 F    Aitkin, MN       82 F    Moose_Lake, MN  82 F
Grand_Rapids, MN   81 F    Hibbing, MN      80 F    Wadena, MN      79 F
Mark Seeley
Professor and Extension Climatologist
Department of Soil, Water, and Climate
University of Minnesota
St Paul, MN 55108

Below you will find record event reports issued by National Weather Service Forecast Offices on April 15 and 16.

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
414 PM CST WED APR 15 2002

...NEW DAILY RECORD HIGH ESTABLISHED AT LA CROSSE WISCONSIN...
AT 303 PM...LA CROSSE WISCONSIN REPORTED A TEMPERATURE OF 
90 DEGREES. THIS BREAKS THE PREVIOUS RECORD OF 84 DEGREES SET BACK 
ON THIS DATE IN 1896. 

THIS 90 DEGREE READING IS ONLY THE 10TH TIME SINCE 1873 THAT THE 
TEMPERATURE HAS CLIMBED INTO THE 90S IN APRIL AT LA CROSSE. 
IT WAS FIRST TIME SINCE APRIL 6, 1991 THAT THE TEMPERATURE HAD 
REACHED AT LEAST 90 DEGREES IN APRIL AT LA CROSSE. ALSO...THIS WAS 
THE 3RD LATEST DATE FOR EARLIEST 90 DEGREE READING AT LA CROSSE.
THE EARLIEST DATE WAS APRIL 6, 1991.

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
437 PM CST WED APR 15 2002

...NEW DAILY RECORD HIGH ESTABLISHED AT ROCHESTER MINNESOTA...
GUSTY SOUTH WINDS ALONG WITH ABUNDANT SUNSHINE TODAY SET THE STAGE 
FOR RECORD HIGH TEMPERATURES ACROSS SOUTHEAST MINNESOTA. AT 1532 
PM...ROCHESTER MINNESOTA REPORTED A HIGH TEMPERATURE OF 87 DEGREES. 
THIS BREAKS THE PREVIOUS RECORD OF 80 DEGREES SET BACK ON THIS DATE 
IN 1942. 

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
510 PM CST MON APR 15 2002
...HIGH TEMPERATURE RECORDS SLAUGHTERED AT SEVERAL LOCATIONS...

MILLIONS OF PLAIN OLD FOLK ACROSS THE UPPER MIDWEST WERE DOUBLE 
CHECKING THEIR THERMOMETERS AND CALENDARS THIS AFTERNOON...AS MOTHER
NATURE HUFFED AND PUFFED AND BLEW THE OLD RECORD HIGH TEMPERATURE DOORS
DOWN AT SEVERAL LOCATIONS. THE FOLLOWING OFFICIAL SITES HAD NEW RECORD
WARMTH ON THIS TAX DAY 2002:

CITY                   OLD RECORD            NEW AND IMPROVED RECORD

MINNEAPOLIS          82 IN 1915,1976                 91
ST CLOUD             83 IN 1913                      84
EAU CLAIRE           82 IN 1942                      91

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
957 PM CDT MON APR 15 2002

...TWO RECORD HIGH MINIMUMS SET IN THE REGION TODAY...
IN ADDITION TO THE RECORD BREAKING WARMTH THIS AFTERNOON...THE 
TEMPERATURES NEVER REALLY COOLED DOWN ALL THAT MUCH EARLY THIS 
MORNING. THEY ARE ALSO NOT EXPECTED TO DROP THAT MUCH BEFORE 
MIDNIGHT...SO THE RECORD HIGH MINIMUMS IN BOTH SIOUX FALLS AND SIOUX 
CITY HAVE BEEN BROKEN. THE LOW TEMPERATURE OF ONLY 63 AT 310 AM CDT 
IN SIOUX FALLS BROKE THE RECORD OF 57...SET BACK IN 1957. THE LOW 
TEMPERATURE OF ONLY 64 AT 253 AM CDT IN SIOUX CITY BROKE THE RECORD 
OF 58...SET BACK IN 1976.

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1029 PM CDT MON APR 15 2002

ADDED IN THE YEAR OF THE OLD RECORD IN SIOUX CITY
...FOUR RECORD DAILY HIGH TEMPERATURES SET IN THE REGION TODAY...

THE WARM SOUTH WIND ACROSS MUCH OF THE REGION THIS AFTERNOON PUSHED 
HIGH TEMPERATURES INTO THE MID 80S TO MID 90S. 
SIOUX CITY IOWA WAS ONE OF THE WARMEST PLACES...REACHING 96 DEGREES 
AT 516 PM CDT. THIS BROKE THE RECORD HIGH OF 85 SET BACK IN 1985. 

THE HIGH PEAKED OUT AT 91 DEGREES AT RADIO STATION KICD SPENCER 
IOWA...BREAKING THE RECORD OF 82 SET BACK IN 1977.
IN VERMILLION SOUTH DAKOTA...THE TEMPERATURE HAD REACHED 90 DEGREES 
BY 330 PM. THIS BROKE THE RECORD HIGH OF 87 SET BACK IN 1954.

THE THERMOMETER AT THE SIOUX FALLS NATIONAL WEATHER SERVICE TOPPED 
OUT AT 89 DEGREES AT 320 PM CDT...SMASHING THE RECORD HIGH OF 85 SET 
WAY BACK IN 1898.

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
442 PM CST TUE APR 16 2002

...DAILY RECORD HIGH TEMPERATURE TIED IN ROCHESTER MINNESOTA...
FOR THE SECOND DAY IN A ROW...UNSEASONABLE WARM TEMPERATURES WERE 
WIDESPREAD ACROSS THE UPPER MIDWEST. ROCHESTER MINNESOTA REPORTED A HIGH 
TEMPERATURE OF 84 DEGREES THROUGH 430 PM THIS AFTERNOON. THIS TIES 
THE PREVIOUS RECORD SET ON THIS DATE IN 1977. IF THE RECORD IS 
BROKEN DURING THE REMAINDER OF THE AFTERNOON...ANOTHER RECORD REPORT 
WILL BE ISSUED THIS EVENING.

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE DULUTH MN
514 PM CST TUE APR 16 2002

...RECORD DAILY HIGH TEMPERATURE BROKE AT THE NATIONS ICE BOX...

THE INTERNATIONAL AIRPORT AT INTERNATIONAL FALLS MINNESOTA REACHED A 
RECORD HIGH OF 79 DEGREES AT 431 PM CDT...TODAY APRIL 16TH. THE OLD 
RECORD HIGH FOR TODAY WAS 75 DEGREES SET IN 1958.  
THE NORMAL HIGH TODAY IN INTERNATIONAL FALLS IS 52 AND THE NORMAL
LOW IS 27.

A UPDATED RECORD EVENT REPORT WILL BE SENT LATER THIS EVENING IF 
THE TEMPERATURE RISES ABOVE THE CURRENT 79 DEGREES.

RECORD REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
608 PM CDT TUE APR 16 2002

...SEVERAL RECORDS FALL ACROSS EASTERN NORTH DAKOTA TODAY...
AT THE GRAND FORKS INTERNATIONAL AIRPORT THE TEMPERATURE REACHED 87 
DEGREES THIS AFTERNOON AT 323 PM...WHICH BREAKS THE PREVIOUS RECORD 
OF 82 DEGREES SET IN 1981. 

THE TEMPERATURE AT THE NATIONAL WEATHER SERVICE IN GRAND FORKS 
REACHED 87 DEGREES AT AROUND 420 PM THIS AFTERNOON...WHICH BREAKS THE 
PREVIOUS RECORD OF 80 SET IN 1981. 
THE TEMPERATURE AT HECTOR AIRPORT IN FARGO REACHED 89 DEGREES AT 140
PM...BREAKING THE PREVIOUS RECORD OF 82 DEGREES WHICH WAS LAST SET 
IN 1913.

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE DULUTH MN
140 AM CST WED APR 17 2002

...RECORD DAILY PRECIPITATION BROKE AT THE NATIONS ICE BOX...

THE INTERNATIONAL AIRPORT AT INTERNATIONAL FALLS MINNESOTA RECORDED 
0.71 INCHES OF PRECIPITATION...TODAY APRIL 16TH. THE PREVIOUS RECORD 
AMOUNT FOR APRIL 16TH WAS 0.41 INCHES RECORDED IN 1961.
THE NORMAL PRECIPITATION FOR THE DAY IS 0.05 INCHES. 

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mcwg@soils.umn.edu
URL: http://climate.umn.edu/doc/journal/mid-april2002heat.htm
Last modified: April 17, 2002