Flash Flood Warning 4, NWS Des Moines, IA

IAZ002-003-007-311830-

SPECIAL WEATHER STATEMENT AND AREA WEATHER UPDATE
NATIONAL WEATHER SERVICE WATERLOO IA
1230 PM CDT FRI MAY 31 1991

AT 1230 PM CDT WEATHER RADAR SHOWED A 50 MILE WIDE AREA OF SHOWERS AND
THUNDERSTORMS LOCATED FROM THE IOWA/MINNESOTA BORDER SOUTH OF LACROSS
WISCONSIN TO TAMA...35 MILES SOUTH OF WATERLOO.  THESE SHOWERS AND
THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR AND WERE PRODUCING
SOME LOCALLY HEAVY RAINS AND FREQUENT LIGHTNING STRIKES.

THE SHOWERS AND THUNDERSTORMS SHOULD MOVE OUT OF NORTHEAST IOWA THIS
AFTERNOON AROUND 2 PM CDT...HOWEVER CONDITIONS ARE SET UP FOR MORE
RAINFALL DEVELOPMENT LATER THIS AFTERNOON.  TEMPERATURES OVER NORTHEAST
IOWA SHOULD CLIMaB INTO THE 80S WITH VARIABLE WINDS DUE TO THE SHOWER
ACTIVITY OF 10 TO 15 MILES AN HOUR.

IAZALL-311845-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
1250 PM CDT FRI MAY 31 1991

...SEVERE THUNDERSTORM WATCH FOR A SMALL PART OF EASTERN IOWA UNTIL
5 PM...

AT 1235 PM CDT...INTENSE THUNDERSTORMS WERE LOCATED FROM 10 MILES
SOUTHWEST TO ABOUT 20 MILES NORTH NORTHWEST OF DES MOINES. THESE
STORMS WILL PRODUCE VERY HEAVY DOWNPOURS...SOME HAIL AND FREQUENT
DEADLY LIGHTNING. PEOPLE LIVING IN FLOOD PRONE AREAS AROUND THE
DES MOINES METROPOLITAN AREA SHOULD BE ON THE LOOKOUT FOR FAST
RISING WATERS...AND DO NOT ATTEMPT TO CROSS LOW LYING AREAS THAT
HAVE STANDING WATER.

OTHER VERY STRONG STORMS WERE OCCURRING BETWEEN CEDAR RAPIDS AND
WATERLOO...AS WE|LL AS IN THE FORT DODGE AREA. THESE STORMS ARE ALSO
CAPABLE OF PRODUCING EXTREMELY HEAVY RAIN AND PEA TO MARBLE SIZED
HAIL.

THESE THUNDERSTORMS WERE MOVING EAST NORTHEAST AT 30 MILES AN HOUR.

BARLOW

IAZALL-311945-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
145 PM CDT FRI MAY 31 1991

...SEVERE THUNDERSTORM WATCH FOR A SMALL PART OF EASTERN IOWA UNTIL
5 PM...

AT 132 PM CDT...INTENSE THUNDERSTORMS WERE LOCATED FROM 25 MILES
SOUTHWEST TO ABOUT 25 MILES NORTHEAST OF DES MOINES. THESE
STORMS WILL PRODUCE VERY HEAVY DOWNPOURS...SOME HAIL AND FREQUENT
DEADLY LIGHTNING. PEOPLE LIVING IN FLOOD PRONE AREAS AROUND THE
DES MOINES METROPOLITAN AREA SHOULD BE ON THE LOOKOUT FOR FAST
RISING WATERS...AND DO NOT ATTEMPT TO CROSS LOW LYING AREAS THAT
HAVE STANDING WATER.

OTHER VERY STRONG STORMS WERE OCCURRING BETWEEN CEDAR RAPIDS AND
CENTRAL CITY...30 MILES NORTHEAST OF CEDAR RAPIDS. THESE STORMS ARE ALSO
CAPABLE OF PRODUCING EXTREMELY HEAVY RAIN AND PEA TO MARBLE SIZED
HAIL.

THESE STORMS WERE PART OF AN AREA OF SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS OVER THE SOUTHEAST HALF OF IOWA.

THESE THUNDERSTORMS WERE MOVING EAST NORTHEAST AT 30 MILES AN HOUR.

BARLOW/RICHTER

IAZALL-312015-

SPECIAL WEATHER STATEMENT AND IOWA WEATHER UPDATE
NATIONAL WEATHER SERVICE DES MOINES IA
215 PM CDT FRI MAY 31 1991

AT 205 PM...THERE WAS A 15 TO 30 MILE WIDE BAND OF NUMEROUS SHOWERS
AND SCATTERED VERY STRONG THUNDERSTORMS THAT EXTENDED FROM 20 MILES
SOUTHWEST OF DES MOINES...NEAR WINTERSET NORTHEAST THROUGH CEDAR RAPIDS
TO THE IOWA/ILLINOIS BORDER 10 MILES SOUTH OF DUBUQUE.

SEVERAL OF THE THUNDERSTORMS IN THIS AREA HAVE BEEN PRODUCING EXTREMELY
HEAVY RAINS...ALONG WITH SPOTTY PEA TO MARBLE SIZED HAIL AND FREQUENT
DEADLY LIGHTNING.

PEOPLE LIVING NEAR FLOOD PRONE AREAS NEAR THIS LINE OF THUNDERSTORMS
SHOULD BE ON THE LOOKOUT FOR SIGNIFICANT FLOODING...PARTICULARLY
ALONG >SMALL RIVERS AND STREAMS.

THE SHOWERS AND STORMS WERE MOVING EAST NORTHEAST AT 25 TO 30 MILES AN
HOUR...HOWEVER THE ENTIRE AREA OF PRECIPITATION WAS SAGGING SOUTHEAST AT
10 TO 15 MILES AN HOUR.

BARLOW

IAZ002-003-007-311830-

SPECIAL WEATHER STATEMENT AND AREA WEATHER UPDATE
NATIONAL WEATHER SERVICE WATERLOO IA
220 PM CDT FRI MAY 31 1991

AT 220 PM CDT WEATHER RADAR SHOWED A 50 MILE WIDE AREA OF SHOWERS AND
THUNDERSTORMS LOCATED TO THE WEST OF HIGHWAY 150 AND ALONG THE
MISSISSIPPI RIVER VALLEY.  THESE STORMS WERE MOVING TO THE EAST AT 30
MILES AN HOUR AND WERE PRODUCING SOME LOCALLY HEAVY RAINS.  THESE
SHOWERS AND THUNDERSTORMS WILL MOVE OUT OF NORTHEAST IOWA IN THE NEXT
HOUR.

THE OUTLOOK FOR NORTHEAST IOWA FOR THE REST OF THE AFTERNOON IS FOR
SKIES TO REMAIN CLOUDY WITH A CONTINUING CHANCE OF SCATTERED SHOWERS
AND THUNDERSTORMS WITH POSSIBLE LOCALLY HEAVY RAIN.  THE WINDS WILL
BLOW OUT EOF THE SOUTH AT 10 TO 15 MILES AN HOUR WHILE THE TEMPERATURES
WILL HOVER NEAR 70 DEGREES.

IAZALL-312035-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
245 PM CDT FRI MAY 31 1991

AT 230 PM...THERE WAS A 10 TO 15 MILE WIDE BAND OF NUMEROUS SHOWERS
AND SCATTERED VERY STRONG THUNDERSTORMS THAT EXTENDED FROM 15 MILES
SOUTH OF DES MOINES...NEAR INDIANOLA...NORTHEAST TO TOLEDO...OR 55
MILES NORTHEAST OF DES MOINES.  ANOTHER AREA OF VERY STRONG STORMS
WAS LOCATED 35 MILES NORTHWEST OF THE QUAD CITIES...AROUND TIPTON.
SEVERAL OF THE THUNDERSTORMS IN THSES AREAS HAVE BEEN PRODUCING EXTREMELY
HEAVY RAINS...ALONG WITH SPOTTY PEA TO MARBLE SIZED HAIL AND FREQUENT
DEADLY LIGHTNING.

PEOPLE LIVING NEAR FLOOD PRONE AREAS NEAR THIS LINE OF THUNDERSTORMS
SHOULD BE ON THE LOOKOUT FOR SIGNIFICANT FLOODING...PARTICULARLY
ALONG SMALL RIVERS AND STREAMS.

THE SHOWERS AND STORMS WERE MOVING EAST NORTHEAST AT 25 TO 30 MILES AN
HOUR...HOWEVER THE ENTIRE AREA OF PRECIPITATION WAS SAGGING SOUTHEAST AT
10 TO 15m MILES AN HOUR.

BARLOW/RICHTER