Severe Thunderstorm Warning 99, NWS Sioux Falls, SD

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
435 PM CDT MON JUL 20 1987

AT 430 PM CDT...SCATTERED THUNDERSTORMS...SOME INTENSE...CONTINUED
OVER PARTS OF NORTHEAST SOUTH DAKOTA.

THESE STORMS WERE MOSTLY NORTH OF A LINE FROM HURON TO MILBANK WITH
THE HEAVIEST STORMS LOCATED 10 MILES NORTHWEST OF CLARK...JUST NORTH
OF HITCHCOCK AND JUST SOUTH OF DOLAND.  A SIGNIFICANT INCREASE
IN INTENSITY WAS ALSO NOTED.

THESE STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN...HAIL...DANGEROUS
LIGHTNING AND STRONG GUSTY WINDS.  PERSONS IN SOUTHERN AND EASTERN
SPINK AND WESTERN AND NORTHERN CLARK COUNTIES SHOULD BE ALERT FOR
THREATENING WEATHER.

MOVEMENT WAS qNORTHEAST AT 35 MILES AN HOUR.
PFEIFFER

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
535 PM CDT MON JUL 20 1987

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN CLARK
   COUNTY UNTIL 615 PM CDT...

AT 530 PM CDT...AN ISOLATED SEVERE THUNDERSTORM CONTINUED OVER NORTHERN
CLARK COUNTY OF NORTHEAST SOUTH DAKOTA.

THE HEAVIEST PART OF THIS STORM WAS LOCATED JUST NORTH OF CLARK.
LARGE HAIL...DAMAGING THUNDERSTORM WINDS AND VERY HEAVY 1RAINS CAN BE
EXPECTED WITH THIS STORM.

MOVEMENT WAS NORTHEAST AT 5 MILES AN HOUR.
PFEIFFER

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
635 PM CDT MON JUL 20 1987

AT 630 PM CDT...SCATTERED INTENSE THUNDERSTORMS CONTINUED OVER PARTS
OF NORTHEAST...EAST CENTRAL AND SOUTH CENTRAL SOUTH DAKOTA.

THESE STORMS WERE MOSTLY WITHIN A 50 MILE WIDE BAND BETWEEN WILMOT
AND THE NEBRASKA BORDER...SOUTHWEST OF MISSION.  THE HEAVIEST STORMS
WERE LOCATED 10 MILES NORTHWEST OF WATERTOWN...JUST NORTH OF BRISTOL
...5 MILES SOUTHEAST OF CONDE...JUST WEST OF DOLAND...10 MILES
NORTHEAST OF FORT THOMPSON AND 10 MILES SOUTHEAST OF PRESHO.

THESE STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN...HAIL AND
DANGEROUS LIGHTNING.  PERSONS IN THE NORTHEAST...EAST CENTRyAL AND SOUTH
CENTRAL PARTS OF SOUTH DAKOTA SHOULD BE ON THE ALERT FOR THREATENING
WEATHER.

MOVEMENT WAS NORTHEAST AT 15 MILES AN HOUR.
PFEIFFER

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
905 PM CDT MON JULY 20 1987

AT 9PM CDT...THUNDERSTORMS...SOME OF THEM INTENSE WITH HEAVY RAIN
WERE OCCURRING OVER PARTS OF SOUTHEAST SOUTH DAKOTA AND SOUTHWEST
MINNESOTA.  THE THUNDERSTORMS EXTENDED NORTH OF A LINE FROM ABOUT
90 MILES WEST/NORTHWEST OF SIOUX FALLS...NEAR WOONSOCKET SOUTH
DAKOTA...NORTHEAST TO ABOUT 100 MILES NORTHEAST OF SIOUX FALLS...
NEAR GRANITE FALLS MINNESOTA.

SOME OF THE MOST INTENSE THUNDERSTORMS WERE OCCURRING ABOUT 90
MILES WEST/NORTHWEST OF SIOUX FALLS...JUST NORTH OF WOONSOCKET AND
ABOUT 85 MILES NORTH OF SIOUX FALLS...NEAR BRANDT SOUTH DAKOTA.

THESE THUNDERSTORMS ARE CAPABLE OF PRODUC;ING VERY HEAVY RAIN...HAIL
AND DANGEROUS LIGHTNING.  THEY ARE MOVING NORTHEAST AT ABOUT 15 MILES
AN HOUR.
GOLDEN

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
925 PM CDT MON JULY 20 1987

AT 925 PM CDT A THUNDERSTORM WITH STRONG GUSTY WINDS AND VERY HEAVY
RAIN WAS LOCATED 10 MILES WEST OF BROOKINGS SOUTH DAKOTA. THIS THUNDER/
STORM WAS PRODUCING WIND GUSTS TO 45 MPH ACCORDING TO THE BROOKINGS
FIRE DEPARTMENT. SMALL HAIL WAS ALSO POSSIBLE WITH THIS THUNDERSTORM AS
IT MOVED EAST/SOUTHEAST AT 15 MPH.

THIS THUNDERSTORM WAS PART OF A LINE OF THUNDERSTORMS WHICH EXTENDED
FROM 35 MILE NORTH OF REDWOOD FALLS MINNESOTA TO JUST NORTH OF
CHAMBERLAIN SOUTH DAKOTA. THIS LINE OF THUNDERSTORMS WAS SAGGING SLOWLY
SOUTH AT 10 MPH. EVENTUALLY THE CITIES OF MITCHELL AND SIOUX FALLS
WILL EXPERIENCE BEFORE MIDNIGHT CDT IF THESE STORM HOLD TOGETHER.
ANY OF THE THUNDERSTORMS CAN PRODUCE GUSTY WINDS TO AROUND 45 MPH...
SMALL HAIL...AND VERY HEAVY RAINS. SMALL STREAM AND URBAN FLOODING IS
ALSO POSSIBLE DUE TO REPEAT THUNDERSTORMS PASSINhG THROUGH THE SAME
AREAS.
KAPELA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1005 PM CDT MON JULY 20 1987

AT 1000 PM CDT...THUNDERSTORMS...SOME OF THEM INTENSE WITH HEAVY RAIN
...CONTINUED OVER PARTS OF EASTERN SOUTH DAKOTA AND NORTHWEST MIN/
NESOTA.  THESE THUNDERSTORMS EXTENDED NORTH OF A LINE FROM ABOUT 90
MILES WEST OF SIOUX FALLS...NEAR PLANKINTON SOUTH DAKOTA...NORTHEAST
TO ABOUT 100 MILES NORTHEAST OF SIOUX FALLS...NEAR REDWOOD FALLS
MINNESOTA.

SOME OF THE MOST INTENSE THUNDERSTORMS WERE OCCURRING ABOUT 45 MILES
NORTHWEST AND NORTH OF SIOUX FALLS...NEAR HOWARD AND BROOKINGS SOUTH
DAKOTA.

THESE THUNDERSTORMS CAN PRODUCE HEAVY RAIN...HAIL AND DEADLY LIGHT/
NING AS THEY MOVE EAST AT ABOUT 10 MILES AN HOUR.
GOLDEN