Flash Flood Warning 9, NWS Des Moines, IA

IAZALL-150515-

SPECIAL WEATHER STATEMENT AND SHORT RANGE FORECAST FOR IOWA
NATIONAL WEATHER SERVICE DES MOINES IA
1110 PM CDT MON SEP 14 1992

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE SOUTHERN THIRD OF
   IOWA UNTIL MIDNIGHT...
...A FLASH FLOOD WATCH IS IN EFFECT FOR PARTS OF SOUTHWEST AND SOUTH
   CENTRAL IOWA UNTIL MIDNIGHT...

AT 1105 PM...SCATTERED STRONG AND VERY STRONG THUNDERTORMS WERE OVER
WEST CENTRAL...SOUTHWEST...SOUTH CENTRAL...AND SOUTHEAST IOWA.  THE
STRONGEST OF THESE STORMS WAS LOCATED FROM NEAR LUCAS TO NEAR LEON...
OR 35 TO 50 MILES SOUTH OF DES MOINES...AND NEAR CARROLL AND COON
RAPIDS...OR 60 MILES NORTHWEST OF DES MOINES.

THESE STORMS WERE PRODUCING EXTREMELY HEAVY RAIN...NEARLY CONTINUOUS
LIGHTNING...AND COULD PRODUCE SMALL HAIL AND DAMAGING WIND.  THESE
STORMS WERE MOVING SLOWLY AND COULD EASILY PRODUCE FLOODING OF SOME
STREAMS...AS WELL AS STREETS AND LOW-LYING AREAS.  MOTORISTS ARE URGED
TO EXERCISE CAUTION AND AVOID LOW LYING AREAS SUCH AS BRIDGE
UNDERPASSES.

THE STORMS WERE PART OF AN AREA OF SHOWERS AND STORMS OCCURRING OVER
THE SOUTH HALF OF IOWA.  THE RAIN WAS SOUTH OF A LINE FROM NEAR
SIOUX CITY TO CEDAR RAPIDS TO DAVENPORT.

THE STORMS AND SHOWERS WERE MOVING EAST AT 15 TO 20 MILES AN HOUR.

THE ONE TO TWO HOUR OUTLOOK IS FOR STRONG THUNDERSTORMS WITH VERY HEAVY
RAINFALL TO CONTINUE ACROSS PARTS OF WESTERN AND SOUTHERN IOWA.

MILLER

IAZALL-150545-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
1142 PM CDT MON SEP 14 1992

...A FLASH FLOOD WATCH IS IN EFFECT FOR PARTS OF SOUTHWEST AND SOUTH
   CENTRAL IOWA UNTIL MIDNIGHT...

AT 1130 PM...ISOLATED VERY STRONG THUNDERSTORMS WERE OCCURRING OVER
SOUTH CENTRAL IOWA.  THE STORMS WERE LOCATED 50 MILES SOUTH OF DES
MOINES...OR 10 MILES WEST OF LEON...AND 40 MILES SOUTHEAST OF DES MOINES
NEAR HUMESTON.

IN ADDITION TO EXTREMELY HEAVY RAINFALL AND NEARLY CONTINUOUS LIGHTNING
...THESE STORMS COULD ALSO PRODUCE SMALL HAIL AND WIND GUSTS TO 40 MILES
AN HOUR.  DUE TO THE STORMS SLOW MOVEMENT...FLOODING OF SOME STREAMS...
STREETS AND LOW-LYING AREAS IS ALSO POSSIBLE.  MOTORISTS ARE URGED TO
EXERCISE CAUTION AND AVOID CROSSING LOW-LYING AREAS.

THE STORMS WERE PART OF AN AREA OF SHOWERS AND STORMS OCCURRING OVER
THE SOUTHERN TWO THIRDS OF IOWA.  THE RAIN WAS GENERALLY SOUTH OF A
LINE FROM SIOUX CITY...TO WATERLOO...TO DAVENPORT.

THE STORMS AND SHOWERS WERE MOVING EAST AT 15 TO 20 MILES AN HOUR.

JAK

IAZ070>077-080>088-090>099-150600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1145 PM CDT MON SEP 14 1992

SEVERE THUNDERSTORM WATCH NUMBER 843 THAT WAS IN EFFECT FOR THE
SOUTHERN THIRD OF IOWA UNTIL MIDNIGHT HAS BEEN CANCELLED.  ALTHOUGH
SCATTERED THUNDERSTORMS WERE STILL OCCURRING OVER SOUTHERN IOWA...
THE STORMS HAD DECREASED IN INTENSITY AND ARE NO LONGER EXPECTED TO
PRODUCE SEVERE WEATHER.

HOWEVER...THESE STORMS ARE STILL LIKELY TO PRODUCE LOCALLY HEAVY
RAINS IN SOME AREAS.  THEREFORE...A FLASH FLOOD WATCH REMAINS IN
EFFECT FOR PARTS OF SOUTHWEST AND SOUTH CENTRAL IOWA FOR THE
REMAINDER OF TONIGHT.

KALLMAN/CORBETT

IAZALL-150645-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
1245 AM CDT TUE SEP 15 1992

...A FLASH FLOOD WATCH IS IN EFFECT FOR PARTS OF SOUTHWEST AND SOUTH
   CENTRAL IOWA FOR THE REMAINDER OF THE NIGHT...

AT 1230 AM...AN AREA OF NUMEROUS SHOWERS AND THUNDERSTORMS...SOME WITH
VERY HEAVY RAIN...CONTINUED ACROSS THE SOUTHERN TWO-THIRD OF IOWA.

SOME OF THE STRONGEST STORMS CONTINUED IN UNION AND CLARKE COUNTIES OF
SOUTH CENTRAL IOWA. DUE TO THE SLOW MOVEMENT OF THESE STORMS...FLOODING
OF STREAMS...STREETS AND LOW-LYING AREAS IS LIKELY. MOTORISTS ARE URGED
TO EXERCISE CAUTION AND AVOID CROSSING LOW-LYING AREAS.

THIS SHOWER AND THUNDERSTORMS AREA WAS ^125 MILES WIDE AND CENTERED FROM
20 MILES EAST OF COUNCIL BLUFFS TO 35 MILES EAST OF CEDAR RAPIDS.

OTHER STRONG THUNDERSTORMS CONTINUED ACROSS WEST CENTRAL AND SOUTHERN IOWA.

MOVEMENT WAS SLOWLY EAST AT 15 MILES AN HOUR.

R A PRENTICE

IAZALL-150945-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
142 AM CDT TUE SEP 15 1992

...ATTENTION ALL RIVER INTERESTS IN THE SOUTHWEST QUARTER OF IOWA...

HEAVY RAINFALL OF 2 TO 6 INCHES HAS FALLEN ACROSS A BROAD PORTION OF
SOUTHWEST IOWA THROUGH THE DAY AND INTO THE NIGHT.  THIS AREA
ENCOMPASSES THAT PART OF IOWA SOUTH OF INTERSTATE 80 AND WEST OF
INTERSTATE 35.

RISES ON THE MAINSTEM RIVERS IN SOUTHWEST IOWA WILL BE OCCURRING TODAY.
THIS INCLUDES THE NISHNABOTNA...NODAWAY...102...THOMPSON (LOCALLY AS THE
GRAND) AND THE PLATTE.

ALL PERSONS WITH INTERESTS ALONG THESE RIVERS SHOULD MONITOR THEIR
RESPECTIVE RIVERS AND BE PREPARED TO TAKE ACTION IF REQUIRED.  MO"RE
SPECIFIC RIVER STAGE FORECASTS WILL BE AVAILABLE LATER THIS MORNING AS
RAINFALL DATA IS RECEIVED AND ANALYZED.

MYERS

IAZALL-150740-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
143 AM CDT TUE SEP 15 1992

...A FLASH FLOOD WATCH IS IN EFFECT FOR PARTS OF SOUTHWEST AND SOUTH
   CENTRAL IOWA FOR THE REMAINDER OF THE NIGHT...

AT 129 AM...AN AREA OF NUMEROUS SHOWERS AND THUNDERSTORMS...SOME WITH
VERY HEAVY RAIN...CONTINUED ACROSS THE SOUTHERN TWO-THIRD OF IOWA.

THIS AREA WAS 125 MILES WIDE AND CENTERED FROM 15 MILES SOUTHEAST OF
COUNCIL BLUFFS TO 35 MILES EAST OF CEDAR RAPIDS.

SOME OF THE HEAVIEST RAINS WERE FALLING ACROSS SOUTH CENTRAL IOWA
INCLUDING UNION...CLARKE...LUCAS...MONROE...APPANOOSE...WAYNE AND
DECATUR COUNTIES. DUE TO THE SLOW MOVEMENT OF THESE STORMS FLOODING OF
STREAMS...STREETS AND LOW-LYING AREAS IS LIKELY. MOTORISTS ARE URGED TO
EXCERCISE CAUTION AND AVOID CROSSING LOW-LYING AREAS.
/

MOVEMENT OF THE INDIVIDUAL THUNDERSTORMS WAS SLOWLY EAST AT 15 MILES AN
HOUR...WHILE THE ENTIRE AREA WAS MOV(ING SLOWLY SOUTHWEST AT 10 MILES AN
HOUR.

R A PRENTICE