Flash Flood Warning 46, NWS Des Moines, IA

000 
WGUS73 KDMX 170339 CCA
FFSDMX
IAC023-069-075-083-170645-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1036 PM CDT MON AUG 16 2004

...A FLASH FLOOD STATEMENT WAS ISSUED WITH THE WRONG COUNTY CODES IN 
EFFECT...THIS STATEMENT CORRECTS THE PREVIOUS STATEMENT...

...A FLASH FLOOD WARNING CONTINUES FOR SOUTHWESTERN BUTLER...
SOUTHEASTERN FRANKLIN...NORTHEASTERN HARDIN AND NORTHWESTERN GRUNDY
COUNTIES UNTIL 130 AM CDT...

AMATEUR RADIO SPOTTER REPORTED FLASH FLOODING ALONG THE GRUNDY AND 
BUTLER COUNTY LINE ALONG OLD HIGHWAY 20. IN ADDITION...AT 930 
PM...LAW ENFORCEMENT REPORTED A BLACK TOP ROAD UNDERWATER AND 
SEVERAL GRAVEL ROADS WITH WATER FLOWING OVER THEM 6 MILES NORTH OF 
WELLSBURG.

PRECIPITATION ESTIMATES INDICATE 3 TO 4 INCHES OF RAINFALL HAVE 
FALLEN IN THESE AREAS.  ADDITIONAL THUNDERSTORMS MOVING THROUGH THE 
AREA WILL CONTINUE TO PRODUCE VERY HEAVY RAIN THROUGH 1030 PM. 

THUNDERSTORMS ARE CONTINUOUSLY REDEVELOPING OVER THE WARNING 
AREA...RESULTING IN EXCESSIVE RAINFALL. RAINFALL RATES WILL AVERAGE 
1 TO 3 INCHES PER HOUR. THIS WILL CONTINUE TO PRODUCE FLASH 
FLOODING ALONG THE BEAVER CREEK.

FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER
COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF
FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD.

LAT...LON 4241 9316 4241 9284 4262 9286 4261 9318

$$

RUSSELL

000 
WGUS73 KDMX 170436
FFSDMX
IAC023-069-075-083-170645-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1125 PM CDT MON AUG 16 2004

...A FLASH FLOOD WARNING CONTINUES FOR SOUTHWESTERN BUTLER...
SOUTHEASTERN FRANKLIN...NORTHEASTERN HARDIN AND NORTHWESTERN GRUNDY
COUNTIES UNTIL 145 AM CDT...

AT 1125 PM CDT... FLASH FLOODING WAS LIKELY STILL OCCURING ALONG THE 
BEAVER CREEK 21 MILES WEST OF ACKLEY...OR ABOUT 37 MILES EAST OF 
FORT DODGE.  ANOTHER THUNDERSTORM WILL TRACK OVER THE AREA AFFECTING 
THE ACKLEY AREA AND BEAVER CREEK...BRINGING YET ANOTHER HALF TO 
THREE QUARTERS OF AN INCH OF PRECIPITATION BY AROUND MIDNIGHT.  

EARLIER REPORTS INCLUDED AMATEUR RADIO SPOTTER REPORTED FLASH 
FLOODING ALONG THE GRUNDY AND BUTLER COUNTY LINE ALONG OLD HIGHWAY 
20. IN ADDITION...AT 930 PM...LAW ENFORCEMENT REPORTED A BLACK TOP 
ROAD UNDERWATER AND SEVERAL GRAVEL ROADS WITH WATER FLOWING OVER 
THEM 6 MILES NORTH OF WELLSBURG.

THUNDERSTORMS HAVE DIMINISHED SIGNIFICANTLY OVER THE AREA...HOWEVER 
RATES OF 2 TO 3 INCHES PER HOUR AND ESTIMATED RAINFALL OF 3 TO 4 
INCHES COULD MAKE FLOODING IMPACTS CONTINUE PAST MIDNIGHT. 

FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER
COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF
FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD.

LAT...LON 4241 9316 4241 9284 4262 9286 4261 9318

$$

RUSSELL

000 
WGUS73 KDMX 170531
FFSDMX
IAC023-069-075-083-170645-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1230 AM CDT TUE AUG 17 2004

...A FLASH FLOOD WARNING CONTINUES FOR SOUTHWESTERN BUTLER...
SOUTHEASTERN FRANKLIN...NORTHEASTERN HARDIN AND NORTHWESTERN GRUNDY
COUNTIES UNTIL 145 AM CDT...

AT 1125 PM CDT...FLASH FLOODING WAS LIKELY STILL OCCURING BUT DIMINISHING
ALONG THE BEAVER CREEK 21 MILES WEST OF ACKLEY...OR ABOUT 37 MILES 
EAST OF FORT DODGE. 

THUNDERSTORMS HAVE DIMINISHED OVER THE AREA...HOWEVER...ESTIMATED 
RAINFALL OF 3 TO 4 INCHES COULD MAKE FLOODING IMPACTS CONTINUE PAST 
MIDNIGHT. NUMEROUS REPORTS OF WATER OVER ROADWAYS WERE RECEIVED 
EARLIER IN THE EVENING...BUT NO NEW FLOODING REPORTS HAVE BEEN 
RECEIVED. ANY FLOODING IS EXPECTED TO RECEDE THROUGH 2 AM. 

AVOID WATER COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN 
ONE FOOT OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD.

LAT...LON 4241 9316 4241 9284 4262 9286 4261 9318

$$

RUSSELL

000 
WGUS73 KDMX 170658
FFSDMX
IAC023-069-075-083-170715-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
150 AM CDT TUE AUG 17 2004

...FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE FOR SOUTHWESTERN 
BUTLER...SOUTHEASTERN FRANKLIN...NORTHEASTERN HARDIN AND 
NORTHWESTERN GRUNDY COUNTIES...

RUNOFF FROM HEAVY RAINFALL MONDAY EVENING IN DITCHES...LOW 
SPOTS...AND SMALL CREEKS SHOULD CONTINUE TO DIMINISH. LARGER RIVERS 
IN THE AREA MAY CONTINUE TO SEE SOME LONGER TERM RISES THROUGH 
TUESDAY. ALTHOUGH SOME ISOLATED THUNDERSTORMS MAY MOVE ACROSS 
SOUTHWEST HARDEN COUNTY...NO ADDITIONAL WIDESPREAD HEAVY RAINFALL IS 
EXPECTED EARLY THIS MORNING. THE FLASH FLOOD WARNING FOR THE AREA 
HAS BEEN ALLOWED TO EXPIRE. 

LAT...LON 4241 9316 4241 9284 4262 9286 4261 9318

$$

JAW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
327 PM CDT MON AUG 16 2004

.DISCUSSION...
SCNDRY S/W VSB IN WV IMAGERY IS ANTICIPATED TO COME INTO PLAY FM THE
4-7PM TIME FRAME ALG THE FNT MOVING INTO THE NWRN CRNR ATTM.
PROFILERS ARE NOT SHOWING MUCH WIND HOWEVER FOR ANY SGFNT FNTL
CONVERGENCE...BUT THE WAVE SHOULD BE ENOUGH TO RELEASE THE
INSTABILITY OF 1-2K J/KG. NW WNDS ALF ARND THE DEEP UPR CYC OVR
CANADA SHOULD PROVIDE ENOUGH SHEAR FOR A FEW STORMS TO ROTATE. THE
13KM RUC REMAINS EMPHATIC ABT PCPN MOVS EWD ACRS THE CWA
OVRNGT...AND NOT MUCH TMR. KEPT CONTINUITY GOING WITH SML CHCS IN
THE SE. BNDRY GOING STNRY IN NRN MO TMR EVENING AHD ANOTHER S/W IN
THE WNW FLOW. THE GFS IS MORE INDUSTRIOUS WITH THIS WAVE WHEREAS THE
ETA/S ARE NOT AS MUCH. CUR FCSTS HAVE CHC POPS ACRS THE S AND WE
WILL CONTINUE THAT THINKING...FIGURING THE FNT WL NOT MOVE NWD MUCH
IN SUCH A FLOW PTRN. NXT SGFNT FNT ARRIVES LTR THIS WEEK WITH A
FRESH AMS...WITH ANY PCPN THREAT SMALL THROUGH THE WKEND ATTM. TMPS
WL APPROACH NORMAL OVER THE NXT COUPLE OF DAYS WITH A FALLBACK AGN
LATE IN THE WEEK. LOOKING LIKE AUGUST WILL INDEED BE BELOW IF NOT
WELL BELOW NORMAL FOR TMPS.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...NONE.

&&

MYERS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
630 PM CDT MON AUG 16 2004

IAZ004>007-015>017-023>028-033>039-044>050-171003-
BLACK HAWK IA-BOONE IA-BREMER IA-BUTLER IA-CALHOUN IA-CARROLL IA-
CERRO GORDO IA-CRAWFORD IA-EMMET IA-FRANKLIN IA-GREENE IA-GRUNDY IA-
HAMILTON IA-HANCOCK IA-HARDIN IA-HUMBOLDT IA-KOSSUTH IA-MARSHALL IA-
PALO ALTO IA-POCAHONTAS IA-SAC IA-STORY IA-TAMA IA-WEBSTER IA-
WINNEBAGO IA-WORTH IA-WRIGHT IA-
INCLUDING THE CITIES OF...FORT DODGE...MASON CITY AND WATERLOO
630 PM CDT MON AUG 16 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND NORTH
CENTRAL IOWA ALONG AND NORTH OF HIGHWAY 30.

.DAY ONE...TONIGHT

SCATTERED THUNDERSTORMS ARE FORECAST THROUGH MIDNIGHT WITH A FEW
STORMS LIKELY REACHING SEVERE CRITERIA.  LARGE HAIL IS THE PRIMARY
THREAT.  DAMAGING WINDS ARE POSSIBLE.  AN ISOLATED TORNADO CANNOT BE
RULED OUT PRIOR TO 9 PM.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THERE IS A SLIGHT RISK FOR SEVERE WEATHER LATE WEDNESDAY AFTERNOON
AND EVENING AS A COLD FRONT PASSES THROUGH THE AREA. LARGE HAIL AND
DAMAGING WINDS WILL BE THE PRIMARY THREATS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY THROUGH 11 PM THIS EVENING AND  AGAIN
LATE WEDNESDAY.

IAZ057>062-070>075-081>086-092>097-171003-
ADAIR IA-ADAMS IA-APPANOOSE IA-AUDUBON IA-CASS IA-CLARKE IA-
DALLAS IA-DAVIS IA-DECATUR IA-GUTHRIE IA-JASPER IA-LUCAS IA-
MADISON IA-MAHASKA IA-MARION IA-MONROE IA-POLK IA-POWESHIEK IA-
RINGGOLD IA-TAYLOR IA-UNION IA-WAPELLO IA-WARREN IA-WAYNE IA-
INCLUDING THE CITIES OF...DES MOINES AND OTTUMWA
630 PM CDT MON AUG 16 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND SOUTH
CENTRAL IOWA ALONG AND SOUTH OF HIGHWAY 30.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS OVER  NORTHERN IOWA EARLY THIS EVENING MAY
MOVE INTO SOUTH CENTRAL IOWA AFTER DARK.  A FEW STORMS MAY BE SEVERE
BETWEEN 1000 PM AND 1 AM.  LARGE HAIL IS THE PRIMARY THREAT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THERE IS A CHANCE OF THUNDERSTORMS ACROSS THE AREA TUESDAY THROUGH
THURSDAY AS A BOUNDARY LINGERS OVER SOUTHERN IOWA AND NORTHERN
MISSOURI. THERE IS A SLIGHT RISK FOR SEVERE WEATHER LATE WEDNESDAY
AFTERNOON AND EVENING. LARGE HAIL AND DAMAGING WINDS WILL BE THE
PRIMARY SEVERE WEATHER THREATS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TODAY BETWEEN 10 PM AND 1 AM.
SPOTTER ACTIVATION MAY ALSO BE REQUIRED WEDNESDAY AFTERNOON AND
EVENING.

JOHNSON

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
722 PM CDT MON AUG 16 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0719 PM     TORNADO          2 SW ACKLEY             42.53N 93.08W
08/16/2004                   HARDIN             IA   TRAINED SPOTTER

            DEBREE VISIBLE

&&

JOHNSON

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
723 PM CDT MON AUG 16 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0722 PM     TORNADO          1 S ACKLEY              42.54N 93.05W
08/16/2004                   HARDIN             IA   LAW ENFORCEMENT

            REPORTED BY IOWA FALLS PD.

&&

MR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
724 PM CDT MON AUG 16 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0712 PM     TORNADO          1 W ACKLEY              42.55N 93.07W
08/16/2004                   HARDIN             IA   LAW ENFORCEMENT

            TORNADO CROSSED FRANKLIN AND HARDIN COUNTY LINE AS
            OBSERVED BY LAW ENFORCEMENT.

&&

JOHNSON

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
725 PM CDT MON AUG 16 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0716 PM     TORNADO          2 W ACKLEY              42.55N 93.09W
08/16/2004                   HARDIN             IA   LAW ENFORCEMENT

            LAW ENFORCEMENT REPORTED TORNADO.

&&

MR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
727 PM CDT MON AUG 16 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0724 PM     HAIL             ACKLEY                  42.55N 93.05W
08/16/2004  1.00 INCH        HARDIN             IA   TRAINED SPOTTER

            REPORTED BY STORM SPOTTER.

&&

MR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
748 PM CDT MON AUG 16 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0730 PM     HAIL             4 SE ACKLEY             42.51N 92.98W
08/16/2004  1.75 INCH        GRUNDY             IA   TRAINED SPOTTER

&&

RPK