Severe Thunderstorm Warning 21, NWS Sioux Falls, SD

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
945 PM CDT TUE MAY 22 1990

...A SEVERE THUNDERSTORM WATCH CONTINUED FOR PARTS OF CENTRAL AND
EASTERN SOUTH DAKOTA ...PARTS OF SOUTHWEST MINNESOTA AND PARTS OF
NORTHWEST IOWA UNTIL 200 AM CDT...

AT 930 PM CDT...NUMEROUS THUNDERSTORMS WERE OCCURRING IN NORTHEAST
SOUTH DAKOTA. THE THUNDERSTORMS WERE IN AN AREA ABOUT 35 MILES WIDE
FROM ABOUT 35 MILES NORTHWEST OF WATERTOWN SOUTHEAST TO LINCOLN COUNTY
IN MINNESOTA OR ABOUT 35 MILES NORTHEAST OF BROOKINGS. THE STRONGEST STORM
WAS LOCATED ABOUT 10 MILES WEST OF WATERTOWN.
ELSEWHERE NUMEROUS THUNDERSTORMS WERE OCCURING OVER PARTS OF SOUTHEAST
AND CENTRAL SOUTH DAKOTA. THE THUNDERSTORMS WERE LOCATED EAST OF THE
MISSOURI RIVER AND SOUTH OF A FORT THOMPSON WOONSOCKET LINE. THE STRONGEST
STORM WAS LOCATED OVER NORTHERN AURORA COUNTY OR ABOUT 20 MILES NORTHWEST
OF MITCHELL.
MOVEMENT OF ALL STORMS WAS SOUTHEAST AT 25 M8ILES AN HOUR.
MILLER

SDZ015>020-MNZ017-IAZ01-230405-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1006 PM CDT TUE MAY 22 1990

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 2 AM...

AT 10 PM CDT THUNDERSTORMS WITH VERY HEAVY RAIN WERE SCATTERED ACROSS
SOUTHEAST SOUTH DAKOTA AND SOUTHWEST MINNESOTA.

IN SOUTH DAKOTA THE STRONGEST STORMS WERE LOCATED 10 MILES SOUTH OF
MITCHELL...90 MILES WEST OF SIOUX FALLS JUST WEST OF PLANKINTON...AND
90 MILES SOUTHWEST OF SIOUX FALLS BETWEEN PLATTE AND LAKE ANDES.

IN SOUTHWEST MINNESOTA THE STRONGEST STORMS WERE LOCATED 50 MILES
NORTHEAST OF SIOUX FALLS NEAR LAKE BENTON.

THESE STORMS ARE CAPABLE OF PRODUCING HAIL...STRONG WINDS AND
VERY HEAVY RAINS ASK THEY MOVE SOUTHEAST AT 30 MPH.
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OTHERWISE SCATTERED SHOWERS AND THUNDERSTORMS WERE LOCATED ACROSS
THE REMAINDER OF SOUTHWEST MINNESOTA...SOUTHEAST SOUTH DAKOTA AND
NORTHWEST IOWA.

STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1037 PM CDT TUE MAY 23 1990

STORM DATA FOR SOUTH DAKOTA AND MINNESOTA

 TIME            COUNTY..LOCATION           CHARACTER OF STORM..DAMAGE
.......................................................................

 1028 PM        CHARLES-MIX LAKE ANDES     HAIL LARGER THAN MARBLE
 1030 PM        PIPESTONE NORTHERN         GOLF BALL SIZE HAIL
 1031 PM        CHARLES-MIX LAKE ANDES     GOLF BALL SIZE HAIL

BLOOM

SDZ017>020-MNZ017-230500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1102 PM CDT TUE MAY 22 1990

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 2 AM...

AT 11 PM CDT THUNDERSTORMS WITH VERY HEAVY RAIN WERE SCATTERED ACROSS
SOUTHEAST SOUTH DAKOTA AND SOUTHWEST MINNESOTA.

IN SOUTH DAKOTA THE STRONGEST STORMS WERE LOCATED IN A LINE FROM 100
MILES WEST OF SIOUX FALLS NEAR LAKE FRANCIS TO 35 MILES SOUTHWEST OF
SIOUX FALLS NEAR ILENE. ANOTHER AREA OF STRON THUNDERSTORMS WERE
LOCATED 45 MILES NORTH OF SIOUX FALLS NEAR BROOKINGS.

IN SOUTHWEST MINNESOTA THE STRONGEST STORMS WERE LOCATED 50 MILES
NORTHEAST OF SIOUX FALLS NEAR SLAYTON.

THESE STORMS ARE CAPABLE OF PRODUCINGA HAIL...STRONG WINDS AND
VERY HEAVY RAINS AS THEY MOVE EAST/SOUTHEAST AT 20 MPH.

IAZ004-230500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
1110 PM CDT TUE MAY 22 1990

...A SEVERE THUNDERSTORM WATCH UNTIL 2 AM CDT...

AT 11:10 PM RADAR SHOWED SHOWERS AND THUNDERSTORMS FROM ELK POINT
SOUTH DAKOTA...20 MILES NORTHWEST OF SIOUX CITY...EXTENDING NORTHWEST
TO 100 MILES WEST OF SIOUX FALLS. THE MOST INTENSE THUNDERSTOMS WERE
NORTH AND WEST OF YANKTON. SCATTERED SHOWERS WERE ALSO DEVELOPING IN
WESTERN IOWA. NO RAIN WAS DETECTED IN NORTHEAST NEBRASKA.

THESE STORMS MAY PRODUCE LARGE HAIL...HEAVY RAIN AND DAMAGING WIND
AS THEY MOVE SOUTHEAST AT 25 MILES AN HOUR. THE THUNDERSTORMS WILL
ALSO MOVE INTO NORTHEAST NEBRASKA.

QUINN

SDZ017-MNZ017-230430-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1116 PM CDT TUE MAY 22 1990

...SEVERE THUNDERSTORM WARNING HAS EXPIRED FOR BROOKINGS COUNTY OF
SOUTH DAKOTA AND FOR NORTHERN MURRAY AND NORTHERN PIPESTONE COUNTIES
OF SOUTHWEST MINNESOTA...

AT 1115 PM CDT RADAR INDICATED THAT THE THUNDERSTORMS HAVE WEAKENED
AND NO LONGER APPEAR TO BE SEVERE.

THE THUNDERSTORMS WERE LOCATED 45 MILES NORTHWEST OF SIOUX FALLS TOR
JUST WEST OF BROOKINGS...AND 45 MILES NORTHEAST OF SIOUX FALLS NEAR
SLAYTON MINNESOTA.

ALTHOUGH THESE STORMS NO LONGER APPEAR TO BE SEVERE...THEY ARE
STILL CAPABLE OF PRODUCING HEAVY RAINS...SMALL HAIL AND GUSTY
WINDS.