Severe Thunderstorm Warning 49, NWS Sioux Falls, SD

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1100 PM CDT SUN AUG 21 1988

...SEVERE THUNDERSTORM WATCH NUMBER 409 HAS EXPIRED...

THE SEVERE THUNDERSTORM WATCH NUMBER 409 WHICH ORIGINALLY COVERED
PARTS OF SOUTHEAST SOUTH DAKOTA...SOUTHWEST MINNESOTA...AND NORTHWEST
IOWA EXPIRED AT 1100 PM CDT. THERE IS NO LONGER A THREAT OF SEVERE
WEATHER IN THIS AREA.

ADDITIONAL ROUNDS OF SCATTERED SHOWERS AND THUNDERSTORMS ARE LIKELY
TONIGHT ACROSS THE LOCAL TRI STATE AREA SURROUNDING SIOUX FALLS.
BRIEF HEAVY RAINS WITH SOME OF THE THUNDERSTORMS MAY RESULT IN SOME
TEMPORARY URBAN STREET FLOODING DUE TO THE INTENSITY OF THE TROPICAL
DOWNPOURS.

RAINFALL AMOUNTS IN THE SIOUX FALLS AREA RANGE FROM 1.50 TO 3.00 INCHES
...AND THERE MAY BE SOME HEAVIER AMOUNTS IN THE LOCAL TRI STATE AREA.
IF YOU HAVE A RELIABLE RAINGAGE...THEN RELAY YOUR RAINFALL TOTAL TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE AT SIOUX FALLS.
KAPELA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
1107 PM CDT SUN AUG 21 1988

 ...THE SEVERE THUNDERSTORM WATCH FOR SOUTHEAST SOUTH DAKOTA AND
NORTHWEST IOWA HAS EXPIRED....

THE SEVERE THUNDERSTORM WATCH FOR SOUTHEAST SOUTH DAKOTA AND NORTHWEST
IOWA HAS EXPIRED. ALTHOUGH THE WATCH HAS EXPIRED..AT 1055 PM RADAR
INDICATED THAT AN AREA OF STRONG THUNDERSTORMS HAD REDEVLOPED IN
SOUTHEAST SOUTH DAKOTA. THE STORMS ARE LOCATED FROM YANKTON SOUTH
DAKOTA...55 MILES NORTHWEST OF SIOUX CITY TO HAWARDEN IOWA...
37 MILES NORTH OF SIOUX CITY. HEAVY RAIN...DANGEROUS LIGHTING AND
45 TO 50 MPH WINDS CAN BE EXPECTED WITH THESE STORMS AS THEY MOVE EAST
AT 25 MILES AN HOUR.

TANNER

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
1140 PM CDT SUN AUG 21 1988

AT 1130 PM CDT...SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED ACROSS
SOUTHEAST SOUTH DAKOTA...SOUTHWEST MINNESOTA AND NORTHWEST IOWA.
THE SHOWERS AND THUNDERSTORMS OVER SOUTH DAKOTA WERE SOUTH AND EAST
OF A LINE FROM BROOKINGS TO MITCHELL TO YANKTON.

MOVEMENT WAS EAST AT 30 MILES AN HOUR.

RAINFALL AMOUNTS OVER PARTS OF SOUTHEAST SOUTH DAKOTA HAVE VARIED FROM
1 TO 3 INCHES OVER THE LAST SEVERAL HOURS AND HAVE CAUSED SOME STREET
FLOODING IN THE SIOUX FALLS AREA.

ADDITIONAL ROUNDS OF SHOWERS AND THUNDERSTORMS...WITH HEAVY RAIN...ARE
LIKELY LATER TONIGHT OVER SOUTHEAST SOUTH DAKO6TA...NORTHWEST IOWA...AND
SOUTHWEST MINNESOTA.

FLOODING OF STREETS AND ROADSIDE DITCHES IS LIKELY LATER TONIGHT...
ALONG WITH DANGEROUS LIGHTNING AND PEA SIZE HAIL.
STOREY

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
1145 PM CDT SUN AUG 21 1988

 ...STRONG THUNDERSTORMS WITH VERY HEAVY RAIN MOVING THROUGH SOUTHEAST
SOUTH DAKOTA AND NORTHWEST IOWA...

AT 1140 PM CDT A 30 MILE WIDE BAND OF STRONG THUNDERSTORMS WITH VERY
HEAVY RAIN WAS LOCATED NORTH OF A LINE FROM NEAR BERESFORD SOUTH
DAKOTA IN NORTHWEST UNION COUNTY...ABOUT 44 MILES NORTHWEST OF SIOUX
CITY TO ABOUT 30 MILES NORTH OF SIOUX CITY NEAR HAWARDEN IOWA TO
CHEROKEE IOWA WHICH IS ABOUT 45 MILES NORTHEAST OF SIOUX CITY.

THESE THUNDERSTORMS WERE MOVING EAST AT 25 MPH AND WERE PASSING OVER
AREAS THAT ALREADY RECIEVED HEAVY RAIN TONIGHT.

FLOODING OF STREETS AND ROADSIDE DITC,HES IS LIKELY WITH THESE STORMS
AS WELL AS DANGEROUS LIGHTNING AND WIND GUSTS UP TO 40 MPH.

PHILLIPS

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
1240 AM CDT MON AUG 22 1988

AT 1230 AM CDT...NUMEROUS INTENSE THUNDERSTORMS...WITH VERY HEAVY RAIN
...CONTINUED OVER MUCH OF SOUTHEAST SOUTH DAKOTA...NORTHWEST IOWA...
NORTHEAST NEBRASKA AND SOUTHWEST MINNESOTA.

THESE STORMS WERE MOSTLY SOUTH OF A LINE FROM FLANDREAU TO BONESTEEL
WITH A THE HEAVIEST STORMS LOCATED 5 MILES SOUTH OF ALCESTER...25 MILES
NORTHEAST OF SIOUX CITY IOWA...10 MILES SOUTH OF YANKTON...10 MILES
NORTHWEST OF AVON AND JUST SOUTHWEST OF BRIDGEWATER.  A SLIGHT INCREASE
IN INTENSITY WAS NOTED.

PERSONS IN THE SOUTHEAST PARTS OF THE STATE SHOULD REMAIN ALERT AS THESE
STORMS ARE CAPABLE OF PRODUCING DANGEROUS LIGHTNING...VERY HEAVY RAIN
AND HAIL.

MOVEMENT WAS EAST AT 30 MILES AN HOUR.
PFEIFFER

STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1250 AM CDT MON AUG 22 1988

STORM DATA FOR SUNDAY AUG 22 1988

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

 1130 PM CDT    YANKTON...AT MAYFIELD      GOLF BALL SIZE HAIL PUT DENTS
                                           INTO CARS.
KAPELA