Alert archive / Iowa / Flash Flood Warnings in 2010

Flash Flood Warning 87, NWS Des Moines, IA

August 10, 20104 counties in Iowa

NWS Des Moines, IA issued this flash flood warning at Aug 10, 2010, 10:21 PM CDT for 4 counties in Iowa. It was in force for 6 hr. 9 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 10, 2010, 10:21 PM CDT (03:21 UTC)
Expired: Aug 11, 2010, 4:23 AM CDT
In force: 6 hr
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Emergency: Flash flood emergency
Flood severity: None

Counties Dallas County, IA, Jasper County, IA, Polk County, IA, Poweshiek County, IA

The radar

The Des Moines radar (KDMX), 28 km from the middle of the area, began a volume at 03:23 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Aug 10, 11:10 PM CDT	FLASH FLOOD	4 Nnw Ankeny Airport, IA	NORTH ANKENY BOULEVARD AND NORTHEAST 9TH STREET CLOSED DUE TO WATER 16 TO 18 INCHES DEEP AT THE INTERSECTION.
Aug 11, 12:16 AM CDT	FLASH FLOOD	4 Nw Ankeny Airport, IA	DEEP IMPASSABLE WATER AT THE INTERSECTION OF WEST 1ST STREET AND SW STATE STREET IN ANKENY.
Aug 11, 12:20 AM CDT	FLASH FLOOD	3 Nnw Ankeny Airport, IA	UP TO 18 INCHES OF RUNNING WATER ACROSS THE INTERSECTION OF SOUTHEAST 4TH STREET AND TRILEIN IN ANKENY.
Aug 11, 12:31 AM CDT	FLASH FLOOD	5 Nne Ankeny, IA	AT LEAST 6 INCHES OF WATER RUNNING ACROSS INTERSTATE 35 AT MILE MARKER 97. MULTIPLE CARS HAVE SPUN OUT.
Aug 11, 12:54 AM CDT	FLASH FLOOD	3 Nnw Ankeny Airport, IA	RUNNING WATER 2 FEET DEEP ON DELAWARE AVE IN THE 400 BLOCK.
Aug 11, 1:25 AM CDT	FLASH FLOOD	4 Nnw Ankeny Airport, IA	QUICK FLOWING WATER...4 TO 5 INCHES DEEP COVERING THE INTERSECTION AT NORTHEAST CRESTMOOR PLACE AND NORTHEAST 6TH STREET.
Aug 11, 1:30 AM CDT	HEAVY RAIN 3.83	1 Nne Ankeny Airport, IA	3.83 INCHES SINCE ABOUT 10 PM TUESDAY NIGHT.
Aug 11, 1:37 AM CDT	HEAVY RAIN 4.34	Polk City, IA	MEASURED BY STREAM GAGE NEAR BIG CREEK.
Aug 11, 3:07 AM CDT	HEAVY RAIN 4.94	Polk City, IA	MEASURED AT AUTOMATED GAGE NEAR BIG CREEK. SIX HOUR RAINFALL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 6 storm reports to this flash flood warning; the first came 49 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.4 hours before the alert went out and 241 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 4124 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 773 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 6.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

358 
WGUS53 KDMX 110321
FFWDMX
IAC049-099-153-157-110930-
/O.NEW.KDMX.FF.W.0087.100811T0321Z-100811T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1021 PM CDT TUE AUG 10 2010

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN DALLAS COUNTY IN CENTRAL IOWA...
  JASPER COUNTY IN CENTRAL IOWA...
  POLK COUNTY IN CENTRAL IOWA...
  POWESHIEK COUNTY IN CENTRAL IOWA...

* UNTIL 430 AM CDT WEDNESDAY

* AT 1019 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR            
  INDICATED SLOW MOVING THUNDERSTORMS MOVING INTO THE AREA
  FROM THE NORTHEAST WITH VERY HEAVY RAINFALL EXPECTED ACROSS
  THE WARNED AREA. RAINFALL RATES OF AN INCH PER HOUR CAN BE         
  EXPECTED THROUGH THE NEXT FEW HOURS...WITH RAINFALL AMOUNTS
  OF 1 TO 2 INCHES WITH LOCALLY HIGHER AMOUNTS EXPECTED 
  ACROSS MUCH OF THE WARNED AREA. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...DES
  MOINES...ALTOONA...ANKENY...BONDURANT...BROOKLYN...CLIVE...
  COLFAX...DALLAS CENTER...GRIMES...GRINNELL...JOHNSTON...MONROE...
  MONTEZUMA...NEWTON...PERRY...PLEASANT HILL...POLK CITY...PRAIRIE
  CITY...URBANDALE...WAUKEE...WEST DES MOINES...WINDSOR HEIGHTS AND
  WOODWARD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

&&

LAT...LON 4151 9379 4167 9414 4186 9412 4186 9230
      4151 9229

$$

BEERENDS

7 follow-up statements

273 
WGUS73 KDMX 110416
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1116 PM CDT TUE AUG 10 2010

IAC049-099-153-157-110930-
/O.CON.KDMX.FF.W.0087.000000T0000Z-100811T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IA-POLK IA-POWESHIEK IA-DALLAS IA-
1116 PM CDT TUE AUG 10 2010

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN DALLAS...
POWESHIEK...POLK AND JASPER COUNTIES UNTIL 430 AM CDT...

AT 1114 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH 
FLOODING FROM THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE 
WARNED AREA. 16 TO 18 INCHES OF WATER WAS REPORTED OVER THE ROADWAY 
AT NORTH ANKENY BOULEVARD AND NORTHEAST 9 TH STREET IN POLK COUNTY 
ALLOWING THE ROADWAY TO BE CLOSED.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH  FLOODING INCLUDE...
DES MOINES...ALTOONA...ANKENY...BONDURANT...BROOKLYN...CLIVE...
COLFAX...DALLAS CENTER...GRIMES...GRINNELL...JOHNSTON...MONROE...
MONTEZUMA...NEWTON...PERRY...PLEASANT HILL...POLK CITY...PRAIRIE
CITY...URBANDALE...WAUKEE...WEST DES MOINES...WINDSOR HEIGHTS AND
WOODWARD.

ADDITIONAL RAINFALL OF 1 TO 2 INCHES IS EXPECTED ACROSS THE WARNED 
AREA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE ALSO SUBJECT TO FLOODING.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4151 9379 4167 9414 4186 9412 4186 9230
      4151 9229

$$

BEERENDS

870 
WGUS73 KDMX 110530
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1230 AM CDT WED AUG 11 2010

IAC049-099-153-157-110930-
/O.CON.KDMX.FF.W.0087.000000T0000Z-100811T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IA-POLK IA-POWESHIEK IA-DALLAS IA-
1230 AM CDT WED AUG 11 2010

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN DALLAS...
POWESHIEK...POLK AND JASPER COUNTIES UNTIL 430 AM CDT...

AT 1222 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT FLASH 
FLOODING WAS OCCURRING IN THE WARNED AREA. THUNDERSTORMS WITH 
EXTREMELY HEAVY RAINFALL WILL CONTINUE ACROSS THE AREA AND PRODUCE 
ADDITIONAL RAINFALL AMOUNTS UP 2 INCHES. MAJOR FLASH FLOODING IS 
LIKELY OR GOING TO CONTINUE THROUGHOUT THE METRO AREA OF DES MOINES. 

AT 1215 AM CDT...POLK COUNTY LAW ENFORCEMENT REPORTED IMPASSABLE 
DEEP WATER OVER THE ROAD AT 1ST AVENUE AND STATE STREET IN 
ANKENY...AND AT THE 200 BLOCK OF NORTHEAST GRANT IN ANKENY. THE 
INTERSECTION OF SOUTHEAST 4TH AND NORTHEAST TRILEIN WAS IMPASSABLE 
DUE TO WATER AT LEAST 18 INCHES DEEP. IN ADDITION...WATER WAS UP TO 
THE BOTTOM OF CARS AT THE INTERSECTION OF NORTHEAST 9TH STREET AND 
ANKENY BOULEVARD. SEVERAL CARS WERE REPORTED STALLED OUT AT ALL 
THESE AFOREMENTIONED LOCATIONS. 

SOME LOCATIONS THAT WILL EXPERIENCE FLASH  FLOODING INCLUDE...DES
MOINES...ALTOONA...ANKENY...BONDURANT...BROOKLYN...CLIVE...COLFAX...
DALLAS CENTER...GRIMES...GRINNELL...JOHNSTON...MONROE...MONTEZUMA...
NEWTON...PERRY...PLEASANT HILL...POLK CITY...PRAIRIE CITY...
URBANDALE...WAUKEE...WEST DES MOINES...WINDSOR HEIGHTS AND WOODWARD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE ALSO SUBJECT TO FLOODING.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4151 9379 4167 9414 4186 9412 4186 9230
      4151 9229

$$

BEERENDS

178 
WGUS73 KDMX 110538
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1238 AM CDT WED AUG 11 2010

IAC049-099-153-157-110930-
/O.CON.KDMX.FF.W.0087.000000T0000Z-100811T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IA-POLK IA-POWESHIEK IA-DALLAS IA-
1238 AM CDT WED AUG 11 2010

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN DALLAS...
POWESHIEK...POLK AND JASPER COUNTIES UNTIL 430 AM CDT...

AT 1234 AM CDT...A FLASH FLOOD EMERGENCY IS IN PROGRESS ACROSS THE 
METRO AREA. LOCAL LAW ENFORCEMENT OFFICIALS REPORTED DEEP WATER 
FLOWING ACROSS INTERSTATE 35 NEAR MILE MARKER 97 NORTH OF 
ANKENY...WITH CARS STALLED AND SPUN OUT ON THE INTERSTATE. 
THUNDERSTORMS WITH EXTREMELY HEAVY RAINFALL WILL CONTINUE 
ACROSS THE AREA AND PRODUCE ADDITIONAL RAINFALL AMOUNTS
UP TO 2 INCHES. MAJOR FLASH FLOODING IS LIKELY OR GOING TO CONTINUE 
THROUGHOUT THE METRO AREA OF DES MOINES. 

STRONG WINDS ARE EXPECTED AS WELL ACROSS THE AREA WHICH COULD LEAD 
TO POWER OUTAGES ALLOWING FOR SUMP PUMP FAILURES AND FLOODING OF 
BASEMENTS THROUGHOUT THE METRO AREA. 

AT 1215 AM CDT...POLK COUNTY LAW ENFORCEMENT REPORTED IMPASSABLE 
DEEP WATER OVER THE ROAD AT 1ST AVENUE AND STATE STREET IN 
ANKENY...AND AT THE 200 BLOCK OF NORTHEAST GRANT IN ANKENY. THE 
INTERSECTION OF SOUTHEAST 4TH AND NORTHEAST TRILEIN WAS IMPASSABLE 
DUE TO WATER AT LEAST 18 INCHES DEEP. IN ADDITION...WATER WAS UP TO 
THE BOTTOM OF CARS AT THE INTERSECTION OF NORTHEAST 9TH STREET AND 
ANKENY BOULEVARD. SEVERAL CARS WERE REPORTED STALLED OUT AT ALL 
THESE AFOREMENTIONED LOCATIONS. 

SOME LOCATIONS THAT WILL EXPERIENCE FLASH  FLOODING INCLUDE...DES
MOINES...ALTOONA...ANKENY...BONDURANT...BROOKLYN...CLIVE...COLFAX...
DALLAS CENTER...GRIMES...GRINNELL...JOHNSTON...MONROE...MONTEZUMA...
NEWTON...PERRY...PLEASANT HILL...POLK CITY...PRAIRIE CITY...
URBANDALE...WAUKEE...WEST DES MOINES...WINDSOR HEIGHTS AND WOODWARD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE MINOR FLOODING OF
SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4151 9379 4167 9414 4186 9412 4186 9230
      4151 9229

$$

689 
WGUS73 KDMX 110618
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
118 AM CDT WED AUG 11 2010

IAC049-099-153-157-110930-
/O.CON.KDMX.FF.W.0087.000000T0000Z-100811T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IA-POLK IA-POWESHIEK IA-DALLAS IA-
118 AM CDT WED AUG 11 2010

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN DALLAS...
POWESHIEK...POLK AND JASPER COUNTIES UNTIL 430 AM CDT...

AT 116 AM CDT...A FLASH FLOOD EMERGENCY IS IN PROGRESS ACROSS THE 
METRO AREA. LOCAL LAW ENFORCEMENT OFFICIALS REPORTED DEEP WATER 
FLOWING ACROSS INTERSTATE 35 NEAR MILE MARKER 97 BETWEEN ANKENY AND 
ELKHART...WITH SEVERAL CARS STALLED AND SPUN OUT ON THE INTERSTATE. 
DALLAS CENTER IS EXPERIENCING 4 TO 10 INCHES OF WATER THROUGHOUT THE 
ENTIRE TOWN. THUNDERSTORMS WITH EXTREMELY HEAVY RAINFALL WILL 
CONTINUE ACROSS THE AREA AND PRODUCE ADDITIONAL RAINFALL AMOUNTS UP 
TO 2 INCHES. MAJOR FLASH FLOODING WILL CONTINUE THROUGHOUT THE METRO 
AREA OF DES MOINES...ANKENY AND DALLAS CENTER.

SOME LOCATIONS THAT WILL EXPERIENCE FLASH  FLOODING INCLUDE...DES
MOINES...ALTOONA...ANKENY...BONDURANT...BROOKLYN...CLIVE...COLFAX...
DALLAS CENTER...GRIMES...GRINNELL...JOHNSTON...MONROE...MONTEZUMA...
NEWTON...PERRY...PLEASANT HILL...POLK CITY...PRAIRIE CITY...
URBANDALE...WAUKEE...WEST DES MOINES...WINDSOR HEIGHTS AND WOODWARD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE MINOR FLOODING OF
SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4151 9379 4167 9414 4186 9412 4186 9230
      4151 9229

$$

BEERENDS

199 
WGUS73 KDMX 110728
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
228 AM CDT WED AUG 11 2010

IAC049-099-153-157-110930-
/O.CON.KDMX.FF.W.0087.000000T0000Z-100811T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IA-POLK IA-POWESHIEK IA-DALLAS IA-
228 AM CDT WED AUG 11 2010

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN DALLAS...
POWESHIEK...POLK AND JASPER COUNTIES UNTIL 430 AM CDT...

AT 221 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS CONTINUED TO REPORT
A SERIOUS FLASH FLOOD SITUATION IN PROGRESS NEAR FOUR MILE CREEK ON 
THE EAST SITE OF THE DES MOINES METRO AREA. RECORD FLOODING MAY 
OCCUR THROUGHOUT THE FOUR MILE CREEK BASIN. EVACUATIONS OF A TRAILER 
PARK NEAR FOUR MILE CREEK ARE TAKING PLACE.  

WATER CONTINUES TO BE REPORTED ACROSS INTERSTATE 35 BETWEEN ANKENY 
AND ELKHART. MANY STREETS THROUGHOUT ANKENY CONTINUE TO BE 
INUNDATED WITH WATER. WATER CONTINUED TO COVER MANY STREETS 
THROUGHOUT THE TOWN OF DALLAS CENTER IN DALLAS COUNTY.  

WATER MAY ALSO BEGIN TO FLOW ACROSS INTERSTATE 80 NEAR THE COLFAX 
EXIT THROUGHOUT THE NEXT FEW HOURS DUE TO FLOODING ALONG INDIAN 
CREEK BACKING UP DUE TO THE SOUTH SKUNK RIVER. 

SOME LOCATIONS THAT WILL EXPERIENCE FLASH  FLOODING INCLUDE...DES
MOINES...ALTOONA...ANKENY...BONDURANT...BROOKLYN...CLIVE...COLFAX...
DALLAS CENTER...GRIMES...GRINNELL...JOHNSTON...MONROE...MONTEZUMA...
NEWTON...PERRY...PLEASANT HILL...POLK CITY...PRAIRIE CITY...
URBANDALE...WAUKEE...WEST DES MOINES...WINDSOR HEIGHTS AND WOODWARD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE MINOR FLOODING OF
SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4151 9379 4167 9414 4186 9412 4186 9230
      4151 9229

$$

BEERENDS

213 
WGUS73 KDMX 110836
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
336 AM CDT WED AUG 11 2010

IAC049-099-153-157-110930-
/O.CON.KDMX.FF.W.0087.000000T0000Z-100811T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IA-POLK IA-POWESHIEK IA-DALLAS IA-
336 AM CDT WED AUG 11 2010

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN DALLAS...
POWESHIEK...POLK AND JASPER COUNTIES UNTIL 430 AM CDT...

AT 327 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS CONTINUED TO REPORT 
A SERIOUS FLASH FLOOD SITUATION IN PROGRESS NEAR FOUR MILE CREEK ON 
THE EAST SITE OF THE DES MOINES METRO AREA. RECORD FLOODING MAY 
OCCUR THROUGHOUT THE FOUR MILE CREEK BASIN. EVACUATIONS OF A TRAILER 
PARK NEAR FOUR MILE CREEK CONTINUE TO TAKE PLACE.

MANY STREETS THROUGHOUT ANKENY CONTINUE TO BE INUNDATED WITH 
WATER.   

AT 245 AM CDT...COLFAX POLICE DEPARTMENT REPORTED WATER WAS 
BEGINNING TO INUNDATE THE WESTBOUND ON RAMP AT EXIT 155 ON 
INTERSTATE 35 DUE TO THE SOUTH SKUNK RIVER. 

WATER MAY ALSO BEGIN TO FLOW ACROSS INTERSTATE 80 NEAR THE COLFAX 
EXIT THROUGHOUT THE NEXT FEW HOURS DUE TO FLOODING ALONG INDIAN 
CREEK BACKING UP DUE TO THE SOUTH SKUNK RIVER. 

SOME LOCATIONS THAT WILL EXPERIENCE FLASH  FLOODING INCLUDE...DES
MOINES...ALTOONA...ANKENY...BONDURANT...BROOKLYN...CLIVE...COLFAX...
DALLAS CENTER...GRIMES...GRINNELL...JOHNSTON...MONROE...MONTEZUMA...
NEWTON...PERRY...PLEASANT HILL...POLK CITY...PRAIRIE CITY...
URBANDALE...WAUKEE...WEST DES MOINES...WINDSOR HEIGHTS AND WOODWARD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE MINOR FLOODING OF
SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4151 9379 4167 9414 4186 9412 4186 9230
      4151 9229

$$

BEERENDS

540 
WGUS73 KDMX 110923
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
423 AM CDT WED AUG 11 2010

IAC049-099-153-157-110936-
/O.CAN.KDMX.FF.W.0087.000000T0000Z-100811T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IA-POLK IA-POWESHIEK IA-DALLAS IA-
423 AM CDT WED AUG 11 2010

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EASTERN DALLAS...
POWESHIEK...POLK AND JASPER COUNTIES IS CANCELLED...

SEVERAL AREAS ACROSS THE DES MOINES METRO AREA...ESPECIALLY THE 
ANKENY AREA CONTINUE TO HAVE STANDING WATER.  JASPER COUNTY LAW 
ENFORCEMENT REPORTED FLOODING REMAINS IN COLFAX AND REASONER AREAS 
BUT THE WATER IS BEGINNING TO RECEDE.  THEREFORE...THE FLASH FLOOD 
WARNING HAS BEEN CANCELLED. 

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4151 9379 4167 9414 4186 9412 4186 9230
      4151 9229

$$

PODRAZIK

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Des Moines, IA wrote its last area forecast discussion before this flash flood warning went out at Aug 10, 6:34 PM CDT, 3 hours 47 minutes earlier.

Area forecast discussion, Aug 10, 6:34 PM CDT, 3 hours 47 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
634 PM CDT TUE AUG 10 2010

.SHORT TERM /TONIGHT/...
CONVECTION CURRENTLY ONGOING ACROSS WESTERN IOWA IS EXPECTED TO
MAINTAIN ITSELF THROUGH THIS EVENING AND THEN BECOME MORE WIDESPREAD
OVERNIGHT AS LOW LEVEL JET INCREASES. EARLIER TODAY AN OUTFLOW
BOUNDARY ORIENTED EAST/WEST STALLED OVER CENTRAL IOWA AND IS STILL
EVIDENT BY THE SUBTLE WIND SHIFT FROM SOUTHERLIES SOUTH OF THE
BOUNDARY TO MORE EASTERLY NORTH OF THE BOUNDARY. GIVEN THE RECENT
HEAVY RAINS AND PRECIPITABLE WATER AMOUNTS IN EXCESS OF 2
INCHES...HAVE ISSUED FLASH FLOOD WATCH CENTERED AROUND CENTRAL CWA.
LOCALIZED RAINFALL RATES OF 1 TO 2 INCHES ARE LIKELY...WHICH WOULD
CAUSE ADDITIONAL HYDRO PROBLEMS TO THESE AREAS. ISOLATED SEVERE
THREAT CAN NOT BE RULED OUT GIVEN THE LARGE CAPE VALUES.

.LONG TERM /WEDNESDAY THROUGH TUESDAY/...
VERY COMPLEX AND BUSY FORECAST OVER THE NEXT SEVERAL DAYS WITH A
PLETHORA OF HAZARDS TO CONSIDER. HOT AND HUMID WEATHER WILL PERSIST
WITH MULTIPLE ROUNDS OF THUNDERSTORMS POSSIBLE...ESPECIALLY TONIGHT
AND THURSDAY NIGHT THROUGH FRIDAY...KEEPING HEAVY RAIN/FLOODING
POTENTIAL HIGH THROUGH THE END OF THE WORK WEEK. DID NOT MAKE MANY
CHANCES TO THIS FORECAST PERIOD BUT DID INCREASE DEWPOINTS A BIT
FURTHER AT TIMES OVER THE NEXT FEW DAYS. HAVE LEFT THE EXCESSIVE
HEAT WARNING FOR THE NEXT COUPLE OF DAYS UNTOUCHED AND EXPANDED THE
CORRESPONDING HEAT ADVISORY A BIT FURTHER NORTH INTO
WEBSTER...STORY...MARSHALL...AND TAMA COUNTIES. ALSO INCREASED POPS
FROM THURSDAY NIGHT THROUGH FRIDAY NIGHT WHEN IT APPEARS ANOTHER
SHORTWAVE WILL MOVE THROUGH FOLLOWED BY THE LONGER WAVE TROUGH AS
THE PARENT MID/UPPER LOW MOVES BY WELL TO OUR NORTH.
THEREAFTER...SOME RELIEF APPEARS IN STORE FROM THE WEEKEND INTO
EARLY NEXT WEEK AS WE ENTER A QUIETER WEST NORTHWEST/CYCLONIC
STEERING FLOW ALOFT AND ADVECT SOME COOLER AND DRIER LOW-LEVEL AIR
INTO THE AREA. KEPT FORECAST DRY FROM LATE SATURDAY
ONWARD...ALTHOUGH VARIOUS LONG RANGE MODELS TRY TO SPIT OUT LIGHT
QPFS AT TIMES.

&&
.AVIATION...11/00Z
COMPLICATED WX STTN WITH NMRS BNDRYS AROUND THE STATE AND VARIOUS
AREAS OF TSRA.  TSRA OVR NRN IA WILL AFFECT KFOD IN THE FIRST COUPLE
HRS AND THEN TURN EAST TO KMCW AND THE KALO AREA.  SRN TAFS MORE
NEBULOUS.  EXPECT TO SEE TSRA HOLD OFF UNTIL AFT SNST BOTH KDSM AND
ESPECIALLY KOTM.  LATE TNGT MVFR CONDS IN BR LKLY TO SPREAD OVR THE
STATE WITH CONDS IPVG BY MID MRNG.  VFR CONDS WITH A LGT SSWLY FLOW
EXPECTED FOR MUCH OF WED.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
HEAT ADVISORY UNTIL 7 PM CDT THURSDAY FOR
APPANOOSE-BOONE-CALHOUN-CLARKE-DALLAS-DAVIS-DECATUR-GREENE-JASPER-
LUCAS-MADISON-MAHASKA-MARION-MARSHALL-MONROE-POLK-POWESHIEK-SAC-STORY
-TAMA-WAPELLO-WARREN-WAYNE-WEBSTER.

FLASH FLOOD WATCH FROM 7 PM CDT THIS EVENING THROUGH WEDNESDAY
MORNING FOR BLACK HAWK-BOONE-BREMER-BUTLER-DALLAS-FRANKLIN-
GREENE-GRUNDY-HAMILTON-HARDIN-JASPER-MADISON-MAHASKA-MARION-
MARSHALL-POLK-POWESHIEK-STORY-TAMA-WARREN-WEBSTER.

EXCESSIVE HEAT WARNING UNTIL 7 PM CDT THURSDAY FOR ADAIR-ADAMS-
AUDUBON-CARROLL-CASS-CRAWFORD-GUTHRIE-RINGGOLD-TAYLOR-UNION.

&&

SHORT TERM...BEITLICH
LONG TERM...LEE
AVIATION...MS AUG 10

Hazardous weather outlook, Aug 10, 4:16 PM CDT, 6 hours 5 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
416 PM CDT TUE AUG 10 2010

IAZ044-045-057-058-070-071-081-082-092-093-111100-
CRAWFORD-CARROLL-AUDUBON-GUTHRIE-CASS-ADAIR-ADAMS-UNION-TAYLOR-
RINGGOLD-
416 PM CDT TUE AUG 10 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED AT TIMES THIS EVENING AND
TONIGHT. ALL MODES OF SEVERE WEATHER WILL BE POSSIBLE...BUT STRONG
WINDS WILL BE THE PRIMARY THREAT. SOME STORMS COULD ALSO PRODUCE
LOCALLY HEAVY RAIN AND FLOODING.

AN EXCESSIVE HEAT WARNING IS IN EFFECT THROUGH TONIGHT WITH HEAT
INDICES APPROACHING 110 DURING PEAK HEATING LATE THIS
AFTERNOON...AND DROPPING TO NO LOWER THAN 75 TONIGHT. PLEASE
REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT
WEATHER.GOV/DESMOINES FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

HEAT INDEX TEMPERATURES OF 110 DEGREES OR GREATER ARE EXPECTED
WEDNESDAY AND THURSDAY. AN EXCESSIVE HEAT WARNING REMAINS IN
EFFECT THROUGH THURSDAY. PLEASE REFER TO THE NATIONAL WEATHER
SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS.

THUNDERSTORM CHANCES RETURN TO THE FORECAST FROM THURSDAY NIGHT
THROUGH FRIDAY NIGHT. SOME STORMS COULD BE SEVERE WITH ADDITIONAL
POTENTIAL FOR HEAVY RAINS AND FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING...AND AGAIN LATE
THURSDAY OR FRIDAY.

IAZ083>086-094>097-111100-
CLARKE-LUCAS-MONROE-WAPELLO-DECATUR-WAYNE-APPANOOSE-DAVIS-
416 PM CDT TUE AUG 10 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED AT TIMES THROUGH TONIGHT. A
FEW STORMS MAY BE SEVERE WITH STRONG WINDS THE PRIMARY THREAT.
LOCALLY HEAVY RAIN AND FLOODING ARE ALSO POSSIBLE.

A HEAT ADVISORY IS ALSO IN EFFECT FOR THE AREA. HEAT INDICES MAY
REACH OR EXCEED 105 DEGREES DURING THE PEAK HEATING LATE THIS
AFTERNOON...AND STAY AT 75 DEGREES OR HIGHER TONIGHT. PLEASE REFER
TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES
FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

HEAT INDEX VALUES OF 105 DEGREES OR GREATER ARE EXPECTED
WEDNESDAY AND THURSDAY. A HEAT ADVISORY REMAINS IN EFFECT THROUGH
THURSDAY. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT
WEATHER.GOV/DESMOINES FOR FURTHER DETAILS.

A FEW NON-SEVERE THUNDERSTORMS WILL LINGER INTO WEDNESDAY MORNING.
THEREAFTER...THUNDERSTORM CHANCES WILL RETURN FROM FRIDAY INTO
SATURDAY MORNING. SOME STORMS COULD BE SEVERE DURING THIS TIME WITH
ADDITIONAL POTENTIAL FOR HEAVY RAINS AND FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AROUND FRIDAY.

IAZ004>007-015>017-023>025-111100-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-
416 PM CDT TUE AUG 10 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

NUMEROUS THUNDERSTORMS ARE EXPECTED THROUGH TONIGHT. SOME STORMS
WILL BE SEVERE...WITH ALL MODES OF SEVERE WEATHER POSSIBLE
INCLUDING TORNADOES. THERE IS ALSO A POTENTIAL FOR LOCALLY HEAVY
RAIN AND FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

HEAT INDEX TEMPERATURES MAY APPROACH 105 DEGREES DURING THE
AFTERNOON AND EVENING ON WEDNESDAY AND THURSDAY. THUNDERSTORM
CHANCES ALSO RETURN TO THE FORECAST FROM THURSDAY NIGHT THROUGH
FRIDAY NIGHT. SOME STORMS COULD BE SEVERE WITH ADDITIONAL
POTENTIAL FOR HEAVY RAINS AND FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED FROM LATE THIS AFTERNOON INTO
TONIGHT...AND AGAIN LATE THURSDAY OR FRIDAY.

IAZ026>028-036>039-111100-
FRANKLIN-BUTLER-BREMER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-
416 PM CDT TUE AUG 10 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

NUMEROUS THUNDERSTORMS ARE EXPECTED TO DEVELOP AND MOVE INTO THE
AREA LATER THIS EVENING THROUGH TONIGHT. A FEW OF THESE STORMS
COULD BE SEVERE. THIS IS ALSO A POTENTIAL FOR HEAVY RAIN AND FLASH
FLOODING. A FLASH FLOOD WATCH IS IN EFFECT FOR THE AREA TONIGHT.
PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT
WEATHER.GOV/DESMOINES FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A FEW NON SEVERE THUNDERSTORMS MAY PERSIST INTO WEDNESDAY
MORNING. HEAT INDEX TEMPERATURES MAY APPROACH 105 DEGREES DURING
THE AFTERNOON AND EVENING ON WEDNESDAY AND THURSDAY. THUNDERSTORM
CHANCES WILL RETURN AGAIN FROM THURSDAY NIGHT INTO SATURDAY
MORNING. SOME STORMS COULD BE SEVERE DURING THIS TIME WITH
ADDITIONAL POTENTIAL FOR HEAVY RAINS AND FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATE THURSDAY OR FRIDAY.

IAZ035-046>050-059>062-072>075-111100-
WEBSTER-GREENE-BOONE-STORY-MARSHALL-TAMA-DALLAS-POLK-JASPER-
POWESHIEK-MADISON-WARREN-MARION-MAHASKA-
416 PM CDT TUE AUG 10 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

NUMEROUS THUNDERSTORMS ARE EXPECTED TO DEVELOP LATER THIS EVENING
THROUGH TONIGHT. SOME STORMS COULD BE SEVERE...WITH ALL MODES OF
SEVERE WEATHER POSSIBLE INCLUDING TORNADOES. SOME STORMS COULD
ALSO PRODUCE HEAVY RAIN AND FLASH FLOODING. A FLASH FLOOD WATCH IS
IN EFFECT FOR THE AREA TONIGHT. PLEASE REFER TO THE NATIONAL
WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER
DETAILS.

A HEAT ADVISORY IS ALSO IN EFFECT FOR THE AREA. HEAT INDICES MAY
REACH OR EXCEED 105 DEGREES DURING THE PEAK HEATING LATE THIS
AFTERNOON...AND STAY AT 75 DEGREES OR HIGHER TONIGHT. PLEASE REFER
TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES
FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

HEAT INDEX TEMPERATURES MAY APPROACH 105 DEGREES DURING THE
AFTERNOON AND EVENING ON WEDNESDAY AND THURSDAY. THUNDERSTORM
CHANCES WILL ALSO RETURN TO THE FORECAST FROM THURSDAY NIGHT
INTO SATURDAY MORNING. SOME STORMS COULD BE SEVERE DURING THIS
TIME WITH ADDITIONAL POTENTIAL FOR HEAVY RAINS AND FLASH
FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING...AND AGAIN LATE
THURSDAY OR FRIDAY.

IAZ033-034-111100-
SAC-CALHOUN-
416 PM CDT TUE AUG 10 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED AT TIMES THIS EVENING AND
TONIGHT. ALL MODES OF SEVERE WEATHER WILL BE POSSIBLE INCLUDING
TORNADOES. SOME STORMS COULD ALSO PRODUCE LOCALLY HEAVY RAIN AND
FLOODING.

A HEAT ADVISORY IS ALSO IN EFFECT FOR THE AREA. HEAT INDICES MAY
REACH OR EXCEED 105 DEGREES DURING THE PEAK HEATING OF THE
AFTERNOON...AND STAY AT 75 DEGREES OR MORE TONIGHT.  PLEASE REFER
TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES
FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

HEAT INDEX TEMPERATURES OF 105 DEGREES OR GREATER ARE EXPECTED
DURING THE AFTERNOON AND EVENING ON WEDNESDAY AND THURSDAY. A HEAT
ADVISORY IS IN EFFECT FOR THE AREA THROUGH THURSDAY. PLEASE REFER
TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES
FOR FURTHER DETAILS.

THUNDERSTORM CHANCES WILL ALSO RETURN TO THE FORECAST FROM
THURSDAY NIGHT THROUGH FRIDAY NIGHT. SOME STORMS COULD BE SEVERE
DURING THIS TIME WITH ADDITIONAL POTENTIAL FOR HEAVY RAINS AND
FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND
EVENING...AND AGAIN LATE THURSDAY OR FRIDAY.

LEE

In the hours before

Local storm report, Aug 10, 10:00 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1000 PM CDT TUE AUG 10 2010

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

0953 PM     TSTM WND DMG     1 S MONTOUR             41.96N 92.71W
08/10/2010                   TAMA               IA   LAW ENFORCEMENT

            LARGE TREE DOWN ON COUNTY HIGHWAY T47. FROM TAMA COUNTY
            SHERIFF.

0945 PM     TSTM WND DMG     3 E WATERLOO            42.49N 92.29W
08/10/2010                   BLACK HAWK         IA   BROADCAST MEDIA

            TREE FELL THROUGH ROOF OF HOUSE ALONG FULTON STREET. FROM
            KWWL TV.

&&

SMALL

Local storm report, Aug 10, 10:03 PM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1003 PM CDT TUE AUG 10 2010

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

0750 PM     FLASH FLOOD      2 SW FORT DODGE         42.48N 94.21W
08/10/2010                   WEBSTER            IA   LAW ENFORCEMENT

            HIGHWAY 169 CLOSED AND IMPASSABLE AT THE INTERSECTION OF
            U.S. 20 BUSINESS IN SOUTHERN FORT DODGE.

0830 PM     FLASH FLOOD      NNE MOORLAND            42.45N 94.29W
08/10/2010                   WEBSTER            IA   LAW ENFORCEMENT

            OLD HIGHWAY 20 UNDERPASS CLOSED AND IMPASSABLE DUE TO
            HIGH WATER INNUDATING THE ROAD.

0830 PM     FLASH FLOOD      2 NW LEHIGH             42.38N 94.09W
08/10/2010                   WEBSTER            IA   LAW ENFORCEMENT

            WASHOUT IN THE DOLLIVER STATE PARK RELAYED FROM THE PARK
            RANGER.

&&

PODRAZIK

Local storm report, Aug 10, 10:06 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1006 PM CDT TUE AUG 10 2010

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

0950 PM     FLASH FLOOD      2 NNE LYTTON            42.44N 94.86W
08/10/2010                   CALHOUN            IA   LAW ENFORCEMENT

            COUNTY ROAD N28 UNDER WATER NEAR INTERSECTION WITH 240TH
            ST.

&&

JB

Local storm report, Aug 10, 10:07 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1007 PM CDT TUE AUG 10 2010

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

0950 PM     FLASH FLOOD      2 S KNIERIM             42.43N 94.46W
08/10/2010                   CALHOUN            IA   LAW ENFORCEMENT

            COUNTY ROAD P19 IS UNDER WATER 2 MILES NORTH OF HWY 20

&&

JB

Local storm report, Aug 10, 10:13 PM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1013 PM CDT TUE AUG 10 2010

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

1005 PM     FLASH FLOOD      ENE STORY CITY          42.19N 93.59W
08/10/2010                   STORY              IA   EMERGENCY MNGR

            BROAD STREET CLOSED AT FOREST AVENUE IN STORY CITY DUE TO
            RUNNING WATER OVER THE ROAD.

&&

PODRAZIK

Local storm report, Aug 10, 10:15 PM CDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1015 PM CDT TUE AUG 10 2010

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

0957 PM     FLASH FLOOD      9 NNE BOONE AIRPORT     42.17N 93.80W
08/10/2010                   BOONE              IA   LAW ENFORCEMENT

            130TH STREET CLOSED FROM HWY 17 TO THE COUNTY LINE... AT
            ONE LOCATION WATER RUSHING OVER ROAD FROM RUNOFF 4 TO 5
            INCHES DEEP AND APPROXIMATELY 50 FEET WIDE...

&&

JB

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 10, 7:00 PM CDT	Flash Flood Warning	DMX	Calhoun, Hamilton, Humboldt, Webster, Wright	6 hr
Aug 10, 7:40 PM CDT	River Flood Warning	DMX	Boone, Hamilton, Webster	3 days
Aug 10, 7:49 PM CDT	Flash Flood Warning	DMX	Franklin, Hamilton, Hardin	6 hr
Aug 10, 8:29 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Sac, Webster	29 min
Aug 10, 8:55 PM CDT	Flash Flood Warning	DMX	Boone, Greene, Marshall, Story	6 hr
Aug 10, 8:58 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Hamilton, Story, Webster	47 min
Aug 10, 9:23 PM CDT	Flash Flood Warning	DMX	Black Hawk, Bremer, Butler, Grundy, Tama	6 hr
Aug 10, 9:33 PM CDT	River Flood Warning	DMX	Dallas, Polk	5 days
Aug 10, 10:32 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Polk, Story	43 min
Aug 10, 11:21 PM CDT	River Flood Warning	DMX	Polk	35 hr
Aug 10, 11:24 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass	51 min
Aug 10, 11:33 PM CDT	Flash Flood Warning	DMX	Mahaska, Marion, Warren	6 hr
Aug 10, 11:54 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	51 min
Aug 11, 12:16 AM CDT	Flash Flood Warning	DMX	Adair, Dallas, Guthrie, Madison	3 hr
Aug 11, 12:29 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Polk, Story	46 min
Aug 11, 12:49 AM CDT	Areal Flood Warning	DMX	Calhoun, Sac	13 hr
Aug 11, 12:56 AM CDT	Areal Flood Warning	DMX	Hamilton, Humboldt, Webster, Wright	24 hr
Aug 11, 1:05 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Polk	40 min
Aug 11, 2:19 AM CDT	Flash Flood Warning	DMX	Appanoose, Davis, Monroe, Wapello	4 hr
Aug 11, 2:46 AM CDT	Areal Flood Warning	DMX	Boone, Greene, Marshall, Story	24 hr
Aug 11, 2:48 AM CDT	River Flood Warning	DMX	Dallas, Polk	9 hr
Aug 11, 2:48 AM CDT	River Flood Warning	DMX	Polk	13 hr
Aug 11, 4:28 AM CDT	Areal Flood Warning	DMX	Dallas, Jasper, Polk	24 hr
Aug 11, 5:41 AM CDT	Areal Flood Warning	DMX	Mahaska, Marion, Warren	6 hr
Aug 11, 5:53 AM CDT	River Flood Warning	DMX	Mahaska, Marion	41 hr
Aug 11, 11:16 AM CDT	River Flood Warning	DMX	Greene	57 hr
Aug 11, 11:38 AM CDT	Areal Flood Warning	DMX	Mahaska, Marion	36 hr
Aug 11, 2:41 PM CDT	Areal Flood Warning	DMX	Greene	12 hr
Aug 11, 4:29 PM CDT	River Flood Warning	DMX	Marshall	36 hr

Nearby

Flash Flood Warnings in Iowa, 2010 Every flash flood warning in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.