Alert archive / Iowa / Flash Flood Warnings in 2008

Flash Flood Warning 110, NWS Des Moines, IA

June 26, 2008Boone County, Dallas County, Polk County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 26, 2008, 8:56 AM CDT for Boone County, Dallas County, Polk County, Iowa. It was in force for 6 hr. 10 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: Jun 26, 2008, 8:56 AM CDT (13:56 UTC)
Expired: Jun 26, 2008, 3:00 PM CDT
In force: 6 hr
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Flood severity: None

Counties Boone County, IA, Dallas County, IA, Polk County, IA

The radar

The Des Moines radar (KDMX), 14 km from the middle of the area, began a volume at 13:59 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
Jun 26, 9:55 AM CDT	FLASH FLOOD	Boone, IA	EXTENSIVE STREET FLOODING IN BOONE. FLASH FLOODING REPORTED AT 150TH AND 139TH STREET IN BOONE COUNTY.
Jun 26, 10:00 AM CDT	FLASH FLOOD	6 Nw Des Moines, IA	1 FOOT OF WATER RUNNING OVER THE INTERSECTION OF DOUGLAS AND MERLE HAY ROADS.
Jun 26, 10:00 AM CDT	FLASH FLOOD	Urbandale, IA	1 FOOT OF WATER DEPTH AT THE INTERSECTION OF DOUGLAS AND MERLE HAY ROAD
Jun 26, 10:04 AM CDT	FLASH FLOOD	West Des Moines, IA	VALLEY WEST DRIVE AND WESTOWN PARKWAY HAD TWO AND A HALF FEET OF WATER DEPTH THAT DROWNED OUT POLICE SQUAD CAR
Jun 26, 10:07 AM CDT	FLASH FLOOD	Boone, IA	WATER OVER NUMEROUS INTERSECTIONS AND STREETS WITH ONE INCH AND EIGHT TENTHS RAINFALL IN A SHORT PERIOD OF TIME
Jun 26, 10:13 AM CDT	FLASH FLOOD	Des Moines, IA	WATER DEPTH IS 3/4 OF FOOT OVER A 300 FOOT AREA AT MARTIN LUTHER KING AND DELAWARE WITH A VEHICLE STALLED OUT IN THE INTERSECTION
Jun 26, 10:15 AM CDT	FLASH FLOOD	Des Moines, IA	TWO AND A HALF FEET DEPTH OF WATER AT THE INTERSECTION OF 63RD STREET AND HICKMAN ROAD
Jun 26, 10:29 AM CDT	FLASH FLOOD	Johnston, IA	WATER OVER ROAD 55TH AND BEAVER DRIVE.
Jun 26, 10:59 AM CDT	FLASH FLOOD	Des Moines, IA	ON I-80 JUST EAST OF THE EAST MIXMASTER INSIDE LANE AND SHOULDER COVERED WITH WATER 4 INCHES DEEP
Jun 26, 11:24 AM CDT	FLASH FLOOD	Des Moines, IA	6-8 INCHES OF WATER RUNNING OVER EAST 22ND STREET AND LOGAN.

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 11 storm reports to this flash flood warning; the first came 59 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

Omaha, NE (KOAX), launched 12:00Z, 1.9 hours before the alert went out and 213 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: 2972 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 1389 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KDMX 261357
FFWDMX
IAC015-049-153-262000-
/O.NEW.KDMX.FF.W.0110.080626T1356Z-080626T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
856 AM CDT THU JUN 26 2008

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BOONE COUNTY IN CENTRAL IOWA...
  DALLAS COUNTY IN CENTRAL IOWA...
  POLK COUNTY IN CENTRAL IOWA...
  THIS INCLUDES THE CITY OF DES MOINES...

* UNTIL 300 PM CDT THURSDAY

* AT 855 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  ADVANCING THUNDERSTORMS WITH VERY HEAVY RAINFALL AND FLASH FLOOD   
  PRODUCING POTENTIAL. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WOODWARD...
  POLK CITY...PERRY...OGDEN...MADRID...BOONE AND ANKENY

ADDITIONAL RAINFALL AMOUNTS OF TWO TO LOCALLY FOUR INCHES ARE 
POSSIBLE IN THE WARNED AREA OVER THE NEXT SEVERAL HOURS. 

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER
GROUND.

LAT...LON 4161 9425 4161 9429 4185 9429 4185 9416
      4221 9417 4220 9371 4186 9371 4186 9335
      4160 9336 4160 9334 4151 9334 4150 9425
TIME...MOT...LOC 1356Z 180DEG 0KT 4171 9385

$$

RUSSELL

6 follow-up statements

000 
WGUS73 KDMX 261500
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
957 AM CDT THU JUN 26 2008

IAC015-049-153-262000-
/O.CON.KDMX.FF.W.0110.000000T0000Z-080626T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-POLK IA-DALLAS IA-
957 AM CDT THU JUN 26 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
DALLAS...POLK AND BOONE COUNTIES...

AT 956 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH 
FLOODING AT 139TH AND 150H STREET..AS WELL AS EXTENSIVE STREET 
FLOODING IN BOONE.
AMATEUR RADIO OPERATORS INDICATED RAIN RATES OVER WEST DES MOINES 
AND CLIVE OF 3.5 INCHES PER HOUR. 
 
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WOODWARD...
POLK CITY...PERRY...OGDEN...MADRID...BOONE AND ANKENY

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 PM CDT
THURSDAY AFTERNOON FOR IOWA.

LAT...LON 4161 9425 4161 9429 4185 9429 4185 9416
      4221 9417 4220 9371 4186 9371 4186 9335
      4160 9336 4160 9334 4151 9334 4150 9425
TIME...MOT...LOC 1457Z 180DEG 0KT 4171 9385

$$

RUSSELL

000 
WGUS73 KDMX 261509
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1007 AM CDT THU JUN 26 2008

IAC015-049-153-262000-
/O.CON.KDMX.FF.W.0110.000000T0000Z-080626T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-POLK IA-DALLAS IA-
1007 AM CDT THU JUN 26 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
DALLAS...POLK AND BOONE COUNTIES...

AT 1005 AM CDT...TRAINED WEATHER SPOTTERS REPORTED A THUNDERSTORM
PRODUCING FLASH FLOODING OVER THE WARNED AREA.

SPOTTERS HAVE INDICATED THAT ONE FOOT OF WATER WAS FLOWING OVER THE 
INTERSECTION OF DOUGLAS AND MERLE HAY.  ALSO A POLICE VEHICLE WAS 
STALLED BY HIGH WATER AT THE INTERSECTION OF 78TH AND PLUM.  
NUMEROUS INTERSECTIONS WERE BEING CLOSED IN THE CITY OF BOONE DUE TO 
HIGH FLOWING WATER.  THIS IS A DANGEROUS FLASH FLOOD 
SITUATION...PLEASE STAY AWAY FROM THIS HIGH WATER.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WOODWARD...
POLK CITY...PERRY...OGDEN...MADRID...BOONE AND ANKENY

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

LAT...LON 4161 9425 4161 9429 4185 9429 4185 9416
      4221 9417 4220 9371 4186 9371 4186 9335
      4160 9336 4160 9334 4151 9334 4150 9425
TIME...MOT...LOC 1507Z 180DEG 0KT 4171 9385

$$

COGIL

000 
WGUS73 KDMX 261612
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1109 AM CDT THU JUN 26 2008

IAC015-049-153-262000-
/O.CON.KDMX.FF.W.0110.000000T0000Z-080626T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-POLK IA-DALLAS IA-
1109 AM CDT THU JUN 26 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
DALLAS...POLK AND BOONE COUNTIES...

AT 1106 AM CDT...LAW ENFORCEMENT REPORTED 4 INCHES OF WATER RUNNING 
OVER INTERSTATE 80...EAST OF THE EAST MIX MASTER INSIDE LANE. 

AN ADDITIONAL INCH OF RAIN IS POSSIBLE THROUGH THE EARLY AFTERNOON. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WOODWARD...
POLK CITY...PERRY...OGDEN...MADRID...BOONE AND ANKENY

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 PM CDT
THURSDAY AFTERNOON FOR IOWA.

LAT...LON 4161 9425 4161 9429 4185 9429 4185 9416
      4221 9417 4220 9371 4186 9371 4186 9335
      4160 9336 4160 9334 4151 9334 4150 9425
TIME...MOT...LOC 1609Z 180DEG 0KT 4171 9385

$$

RUSSELL

000 
WGUS73 KDMX 261731
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1228 PM CDT THU JUN 26 2008

IAC015-049-153-262000-
/O.CON.KDMX.FF.W.0110.000000T0000Z-080626T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-POLK IA-DALLAS IA-
1228 PM CDT THU JUN 26 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
DALLAS...POLK AND BOONE COUNTIES...

AT 1225 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM REDEVELOPMENT...AGGRAVATING EARLIER FLASH 
FLOODING OVER THE WARNED AREA. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WOODWARD...
POLK CITY...PERRY...OGDEN...MADRID...BOONE AND ANKENY

ADDITIONAL RAINFALL AMOUNTS OF LESS THAN AN INCH IS POSSIBLE IN THE 
WARNED AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 PM CDT
THURSDAY AFTERNOON FOR IOWA.

LAT...LON 4161 9425 4161 9429 4185 9429 4185 9416
      4221 9417 4220 9371 4186 9371 4186 9335
      4160 9336 4160 9334 4151 9334 4150 9425
TIME...MOT...LOC 1728Z 180DEG 0KT 4171 9385

$$

RUSSELL

000 
WGUS73 KDMX 261845
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
143 PM CDT THU JUN 26 2008

IAC015-049-153-262000-
/O.CON.KDMX.FF.W.0110.000000T0000Z-080626T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-POLK IA-DALLAS IA-
143 PM CDT THU JUN 26 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
DALLAS...POLK AND BOONE COUNTIES...

AT 139 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM REDEVELOPMENT...WITH THE POTENTIAL FOR YET 
ANOTHER ROUND OF FLASH FLOODING OVER THE WARNED AREA THIS AFTERNOON. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
WOODWARD...POLK CITY...PERRY...OGDEN...MADRID...BOONE...ANKENY AND 
THE DES MOINES METRO AREA

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

LAT...LON 4161 9425 4161 9429 4185 9429 4185 9416
      4221 9417 4220 9371 4186 9371 4186 9335
      4160 9336 4160 9334 4151 9334 4150 9425
TIME...MOT...LOC 1843Z 180DEG 0KT 4171 9385

$$

RUSSELL

000 
WGUS73 KDMX 261955
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
253 PM CDT THU JUN 26 2008

IAC015-049-153-262003-
/O.EXP.KDMX.FF.W.0110.000000T0000Z-080626T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-POLK IA-DALLAS IA-
253 PM CDT THU JUN 26 2008

...THE FLASH FLOOD WARNING WILL EXPIRE AT 300 PM CDT FOR DALLAS...
POLK AND BOONE COUNTIES...

LIGHT RAINFALL WILL CONTINUE INTERMITTENTLY ACROSS THE 
AREA...HOWEVER THE HEAVY RAIN HAS ENDED ALLOWING THE FLASH FLOOD 
THREAT TO DIMINISH. REPORTS INDICATE THAT ANY PREVIOUS FLASH 
FLOODING HAS RECEDED ACROSS THE AREA. 

LAT...LON 4161 9425 4161 9429 4185 9429 4185 9416
      4221 9417 4220 9371 4186 9371 4186 9335
      4160 9336 4160 9334 4151 9334 4150 9425
TIME...MOT...LOC 1953Z 180DEG 0KT 4171 9385

$$

ALBRECHT

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 Jun 26, 6:57 AM CDT, 1 hour 59 minutes earlier.

Area forecast discussion, Jun 26, 6:57 AM CDT, 1 hour 59 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
657 AM CDT THU JUN 26 2008

.SHORT/LONG TERM...TODAY THROUGH SUNDAY...MAIN FORECAST CONCERN
IS SEVERE WEATHER AND HEAVY RAIN POTENTIAL TODAY...TONIGHT AND
INTO FRIDAY. MODELS NOT HANDLING SETUP ALL THAT WELL OVER THE
NEXT 12-36 HOURS...ESPECIALLY WITH ONGOING PRECIP IN SOUTHEAST
IOWA AND ACROSS SOUTH DAKOTA. PLENTY OF MOISTURE AVAILABLE...WITH
INSTABILITY INCREASING THIS AFTERNOON AND FORCING EVIDENT AT
310K/315K ISENTROPIC SURFACE OVER NORTHERN IOWA BY 00Z FRIDAY.
STORMS LOOK TO DEVELOP ALONG FRONTAL BOUNDARY IN CENTRAL IOWA
THROUGHOUT THE DAY AND INTO THIS EVENING. FLASH FLOOD WATCH
BEGINS THIS AFTERNOON AND RUNS THROUGH TOMORROW MORNING...MAINLY
OVER THE AFFECTED AREAS FROM WEDNESDAY NIGHTS STORMS. INCREASED
POPS/QPF TODAY...TONIGHT AND INTO TOMORROW FOR AFOREMENTIONED
AREA. MAIN SEVERE THREAT WITH STORMS TODAY/TONIGHT WILL BE HAIL
AND WINDS. COLD FRONT LOOKS TO MOVE THROUGH DSM AREA BY AROUND
MIDDAY FRIDAY...WITH STRATIFORM RAIN ALONG AND BEHIND FRONT THROUGH
TOMORROW NIGHT. COOLER AIR BEHIND FRONT FRIDAY NIGHT INTO THE
WEEKEND...BUT DEEP UPPER LOW TAKES ITS TIME MOVING EAST THIS
WEEKEND...SO KEPT IN AFTERNOON CHANCES OF TSTMS OVER THE
NORTH AND EAST SATURDAY AND SUNDAY AS A COUPLE SHORTWAVES MOVE
THROUGH THE TROUGH. IN ADDITIONAL...WINDS LOOK INCREASE ON
SATURDAY WITH TIGHT PRESSURE GRADIENT SETTING UP WITH FIRST
SHORTWAVE.

&&

.AVIATION...26/12Z
LITTLE TIME FOR UPDATES...STORMS NOW MOVING INTO NW IA ATTM AND WILL
BE MOVING SOUTHEAST ACROSS THE STATE ALONG WARM FRONTAL BOUNDARY.
EXPECT SCT SVR STORMS WITH STRONG WINDS...HAIL...THIS MORNING AND
AGAIN LATER TODAY/TNT./REV

.PREVIOUS DISCUSSION...
THUNDERSTORMS JUST ABOVE TO EXIT SRN IA INCLUDING AROUND KOTM.  WITH
LIGHT WINDS AND LINGERING LOW LEVEL MOISTURE FROM HUMID WED AND
RECENT RAINS...EXPECT PATCHY FOG TO DEVELOP.  HOWEVER EXTENSIVE
MIDDLE CLOUD COVER FROM DEPARTING STORMS AND THUNDERSTORM COMPLEX
OVER DAKOTAS SHOULD DEEP RADIATIVE COOLING FROM BEING TOO EXTREME SO
ONLY MVFR FOG MENTION FOR NOW.  CONFIDENCE IN DAKOTAS COMPLEX MAKING
IT HERE RATHER LOW FOR THE TIME BEING...SO HAVE IGNORED AT 06Z.
HOWEVER FULLY EXPECT ANOTHER ROUND OF THUNDERSTORMS SOMETIME TODAY
OR THU EVENING.  REALLY DO NOT HAVE A FEEL FOR LOCATION OR TIMING
YET SO JUST MENTIONED CB RATHER THAN 6+ HOURS OF THUNDERSTORMS IN
TERMINALS.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH FROM 4 PM CDT THIS AFTERNOON THROUGH FRIDAY
MORNING FOR APPANOOSE-BLACK HAWK-BOONE-BREMER-BUTLER-DALLAS-
DAVIS-FRANKLIN-GRUNDY-HAMILTON-HARDIN-JASPER-LUCAS-MAHASKA-
MARION-MARSHALL-MONROE-POLK-POWESHIEK-STORY-TAMA-WAPELLO-WARREN-
WAYNE-WRIGHT.

&&

KLP/KLP/BSS

Hazardous weather outlook, Jun 26, 8:53 AM CDT, 3 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
853 AM CDT THU JUN 26 2008

IAZ023>026-033>038-044>050-057>062-071>075-083>086-095>097-271400-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-SAC-CALHOUN-WEBSTER-HAMILTON-
HARDIN-GRUNDY-CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL-TAMA-
AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-POWESHIEK-ADAIR-MADISON-WARREN-
MARION-MAHASKA-CLARKE-LUCAS-MONROE-WAPELLO-WAYNE-APPANOOSE-DAVIS-
853 AM CDT THU JUN 26 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MUCH OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

WIDESPREAD THUNDERSTORMS TO MOVE ACROSS THE AREA
THIS THIS MORNING WITH ADDITIONAL ROUNDS POSSIBLE LATER THIS
AFTERNOON AND TONIGHT AND TONIGHT. A MODERATE RISK OF SEVERE STORMS EXIST
OVER IOWA...AS LARGE HAIL AND DAMAGING WINDS POSE AS THE MAIN
THREATS. ISOLATED TORNADOES ARE ALSO POSSIBLE. HEAVY RAIN IS ALSO
LIKELY THROUGH THE AREA...ESPECIALLY BETWEEN HIGHWAY 20 AND
INTERSTATE 80.

A SEVERE THUNDERSTORM WATCH AND A FLASH FLOOD WATCH A BOTH IN
EFFECT FOR THE AREA TODAY. FOR ADDITIONAL INFORMATION PLEASE
REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT
WEATHER.GOV/DESMOINES.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SCATTERED STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED TO CONTINUE
ACROSS THE AREA THROUGHOUT THE DAY ON FRIDAY. LARGE HAIL...DAMAGING
WINDS...AND LOCALLY HEAVY RAIN MAY ACCOMPANY THESE STORMS FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY...TONIGHT...AND FRIDAY.

IAZ004>007-015>017-271400-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
853 AM CDT THU JUN 26 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
IOWA.

.DAY ONE...TODAY AND TONIGHT

WIDESPREAD THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS THE AREA
THIS AFTERNOON AND TONIGHT. A MODERATE RISK OF SEVERE STORMS EXIST OVER
IOWA...AS LARGE HAIL AND DAMAGING WINDS POSE AS THE MAIN THREATS.
LOCALLY HEAVY RAIN MAY ALSO ACCOMPANY THE STRONGER STORMS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SCATTERED STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED TO CONTINUE
ACROSS THE AREA THROUGHOUT THE DAY ON FRIDAY. LARGE HAIL...DAMAGING
WINDS...AND LOCALLY HEAVY RAIN MAY ACCOMPANY THESE STORMS FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY...TONIGHT...AND FRIDAY.

IAZ027-028-039-271400-
BUTLER-BREMER-BLACK HAWK-
853 AM CDT THU JUN 26 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

A FLASH FLOOD WATCH IS IN EFFECT FOR THE AREA. PLEASE REFER TO
THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES.

WIDESPREAD THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS THE AREA
TODAY WITH ADDITIONAL ROUNDS TONIGHT AND TONIGHT. A SLIGHT RISK OF SEVERE
STORMS EXIST OVER IOWA AS LARGE HAIL AND DAMAGING WINDS POSE AS
THE MAIN THREATS. LOCALLY HEAVY RAIN IS ALSO ANTICIPATED TO
ACCOMPANY THESE STORMS...WHICH MAY LEAD TO AREAS OF FLASH
FLOODING.

RIVER FLOODING ALONG THE DES MOINES RIVER BASIN BELOW SAYLORVILLE
RESERVOIR WILL CONTINUE THROUGH THIS WEEKEND. WITH THE ADDITIONAL
RAINFALL FORECAST OVER CENTRAL IOWA TODAY AND TONIGHT...THE
POTENTIAL FOR FURTHER RIVER FLOODING EXIST ALONG THE DES
MOINES...SKUNK...AND IOWA RIVER BASINS AND THEIR TRIBUTARIES. FOR
ADDITIONAL INFORMATION PLEASE REFER TO THE NATIONAL WEATHER
SERVICE WEBSITE AT WEATHER.GOV/DESMOINES.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A FLASH FLOOD WATCH IS IN EFFECT FOR THE AREA THROUGH FRIDAY
MORNING. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT
WEATHER.GOV/DESMOINES.

SCATTERED THUNDERSTORMS ARE EXPECTED TO CONTINUE ACROSS THE AREA
THROUGHOUT THE DAY ON FRIDAY...WITH THE BEST POTENTIAL FOR HEAVY
RAIN NORTH OF INTERSTATE 80 AND EAST OF INTERSTATE 35. IN ADDITION
TO HEAVY RAIN...LARGE HAIL AND DAMAGING WINDS MAY ACCOMPANY THESE
STORMS FRIDAY.

RIVER FLOODING ALONG THE DES MOINES RIVER BASIN BELOW SAYLORVILLE
RESERVOIR WILL CONTINUE THROUGH THE WEEKEND. WITH THE ADDITIONAL
RAINFALL FORECAST OVER CENTRAL IOWA ON FRIDAY...THE POTENTIAL FOR
FURTHER RIVER FLOODING EXIST ALONG THE DES MOINES...SKUNK...AND
IOWA RIVER BASINS AND THEIR TRIBUTARIES. FOR ADDITIONAL INFORMATION
PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT
WEATHER.GOV/DESMOINES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY...TONIGHT...AND FRIDAY.

IAZ070-081-082-092>094-271400-
CASS-ADAMS-UNION-TAYLOR-RINGGOLD-DECATUR-
853 AM CDT THU JUN 26 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
IOWA.

.DAY ONE...TODAY AND TONIGHT

WIDESPREAD THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS THE AREA
THIS AFTERNOON AND TONIGHT. A SLIGHT RISK OF SEVERE STORMS EXIST
OVER IOWA...AS LARGE HAIL AND DAMAGING WINDS POSE AS THE MAIN
THREATS. LOCALLY HEAVY RAIN MAY ALSO ACCOMPANY THE STRONGER STORMS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SCATTERED STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED TO CONTINUE
ACROSS THE AREA THROUGHOUT THE DAY ON FRIDAY. LARGE HAIL...DAMAGING
WINDS...AND LOCALLY HEAVY RAIN MAY ACCOMPANY THESE STORMS FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY...TONIGHT...AND FRIDAY.

DONAVON

In the hours before

Local storm report, Jun 26, 8:34 AM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
834 AM CDT THU JUN 26 2008

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

0831 AM     TSTM WND DMG     CARROLL                 42.07N 94.86W
06/26/2008                   CARROLL            IA   LAW ENFORCEMENT

            TREES WERE DOWN IN CARROLL.

&&

KJUNGBLU

Local storm report, Jun 26, 8:44 AM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
844 AM CDT THU JUN 26 2008

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

0831 AM     TSTM WND GST     LAKE CITY               42.27N 94.73W
06/26/2008  E60 MPH          CALHOUN            IA   TRAINED SPOTTER

&&

SEARCY

Local storm report, Jun 26, 8:46 AM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
846 AM CDT THU JUN 26 2008

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

0820 AM     TSTM WND GST     LAKE CITY               42.27N 94.73W
06/26/2008  E65.00 MPH       CALHOUN            IA   LAW ENFORCEMENT

            LAW ENFORCEMENT RECEIVED A CALL FROM A TRAINED SPOTTER OF
            60 TO 70 MPH WIND GUSTS. TREES WERE DOWNED AND POWER IS
            OUT IN LAKE CITY.

&&

FBOKSA

Local storm report, Jun 26, 8:47 AM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
847 AM CDT THU JUN 26 2008

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

0835 AM     TSTM WND GST     ROCKWELL CITY           42.40N 94.63W
06/26/2008  E65 MPH          CALHOUN            IA   LAW ENFORCEMENT

&&

FBOKSA

Local storm report, Jun 26, 8:55 AM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
855 AM CDT THU JUN 26 2008

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

0848 AM     TSTM WND DMG     5 ENE GLIDDEN           42.09N 94.63W
06/26/2008                   GREENE             IA   TRAINED SPOTTER

            FOUR TO SIX INCH TREE LIMBS DOWN.

&&

KJUNGBLU

Local storm report, Jun 26, 8:56 AM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
856 AM CDT THU JUN 26 2008

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

0841 AM     TSTM WND GST     COON RAPIDS             41.87N 94.68W
06/26/2008  M76 MPH          CARROLL            IA   MESONET

            COON RAPIDS BAYARD SCHOOL NET SITE MEASUREMENT.

&&

RDONAVON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 7:00 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Polk	30 min
Jun 25, 7:11 PM CDT	Severe Thunderstorm Warning	DMX	Hardin	49 min
Jun 25, 7:15 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Hardin	30 min
Jun 25, 7:29 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Polk, Story	46 min
Jun 25, 7:33 PM CDT	Severe Thunderstorm Warning	DMX	Marshall	42 min
Jun 25, 7:37 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin, Grundy, Hardin	38 min
Jun 25, 7:41 PM CDT	Severe Thunderstorm Warning	DMX	Story	34 min
Jun 25, 7:43 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Hardin, Story	36 min
Jun 25, 8:09 PM CDT	Tornado Warning	DMX	Grundy	24 min
Jun 25, 8:10 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Marshall, Tama	50 min
Jun 25, 8:12 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene	48 min
Jun 25, 8:16 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Marshall, Polk, Story	44 min
Jun 25, 8:25 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	35 min
Jun 25, 8:53 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Greene	52 min
Jun 25, 8:55 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Jasper, Marion, Polk, Warren	50 min
Jun 25, 8:57 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	33 min
Jun 25, 8:59 PM CDT	Flash Flood Warning	DMX	Boone, Dallas, Polk	4 hr
Jun 25, 9:01 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek	44 min
Jun 25, 9:08 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Greene, Guthrie	52 min
Jun 25, 9:42 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Jasper, Marion, Polk, Warren	48 min
Jun 25, 9:45 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Greene, Guthrie	45 min
Jun 25, 9:51 PM CDT	Severe Thunderstorm Warning	DMX	Madison	39 min
Jun 25, 10:01 PM CDT	Flash Flood Warning	DMX	Poweshiek, Tama	3 hr
Jun 25, 10:21 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Marion, Monroe	39 min
Jun 25, 10:24 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Madison, Warren	51 min
Jun 25, 10:40 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Wapello	50 min
Jun 25, 10:46 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Monroe	44 min
Jun 25, 10:50 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	40 min
Jun 25, 11:10 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Lucas, Wayne	50 min
Jun 25, 11:13 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Madison, Union	47 min
Jun 25, 11:20 PM CDT	Flash Flood Warning	DMX	Mahaska, Wapello	6 hr
Jun 25, 11:24 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Lucas, Monroe, Wapello, Wayne	51 min
Jun 25, 11:42 PM CDT	River Flood Warning	DMX	Polk	4 days
Jun 25, 11:53 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Ringgold, Union	33 min
Jun 26, 2:00 AM CDT	Severe Thunderstorm Warning	DMX	Warren	45 min
Jun 26, 3:11 AM CDT	Areal Flood Advisory	DMX	Warren	4 hr
Jun 26, 4:01 AM CDT	Flash Flood Watch	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 38 more	42 hr
Jun 26, 4:14 AM CDT	Flash Flood Warning	DMX	Warren	6 hr
Jun 26, 6:43 AM CDT	Severe Thunderstorm Warning	DMX	Sac	62 min
Jun 26, 6:46 AM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	44 min
Jun 26, 7:00 AM CDT	Areal Flood Advisory	DMX	Lucas, Marion, Monroe	3 hr
Jun 26, 7:39 AM CDT	Areal Flood Advisory	DMX	Sac	3 hr
Jun 26, 7:48 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Crawford, Sac	57 min
Jun 26, 8:03 AM CDT	Flash Flood Warning	DMX	Sac	6 hr
Jun 26, 8:17 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Webster	58 min
Jun 26, 8:21 AM CDT	Areal Flood Advisory	DMX	Calhoun, Carroll, Crawford, Sac	3 hr
Jun 26, 8:24 AM CDT	Severe Thunderstorm Warning	DMX	Carroll, Greene	51 min
Jun 26, 8:29 AM CDT	Flash Flood Warning	DMX	Calhoun, Sac	5 hr
Jun 26, 8:45 AM CDT	Severe Thunderstorm Warning	DMX	Guthrie	45 min
Jun 26, 8:51 AM CDT	Flash Flood Warning	DMX	Webster	5 hr
Jun 26, 9:00 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Greene	45 min
Jun 26, 9:02 AM CDT	Areal Flood Advisory	DMX	Audubon, Carroll, Greene, Guthrie	3 hr
Jun 26, 9:13 AM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster	47 min
Jun 26, 9:14 AM CDT	Flash Flood Warning	DMX	Marion, Warren	6 hr
Jun 26, 9:31 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Polk, Story	44 min
Jun 26, 9:35 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass, Madison	40 min
Jun 26, 9:41 AM CDT	Flash Flood Warning	DMX	Adair, Audubon, Cass, Guthrie, Madison	4 hr
Jun 26, 9:48 AM CDT	Flash Flood Warning	DMX	Story	4 hr
Jun 26, 10:06 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Story	41 min
Jun 26, 10:14 AM CDT	Areal Flood Advisory	DMX	Hamilton	3 hr
Jun 26, 10:30 AM CDT	Severe Thunderstorm Warning	DMX	Marion, Warren	26 min
Jun 26, 10:35 AM CDT	Flash Flood Warning	DMX	Appanoose, Lucas, Monroe	6 hr
Jun 26, 10:46 AM CDT	Wind Advisory	DMX	Audubon, Boone, Calhoun, Carroll, Crawford, Dallas and 14 more	3 hr
Jun 26, 10:55 AM CDT	Areal Flood Advisory	DMX	Adams, Clarke, Decatur, Lucas, Ringgold, Taylor and 1 more	3 hr
Jun 26, 11:03 AM CDT	Areal Flood Advisory	DMX	Appanoose, Grundy, Hardin, Marshall	10 days
Jun 26, 11:31 AM CDT	River Flood Warning	DMX	Polk	9 hr
Jun 26, 12:05 PM CDT	River Flood Warning	DMX	Lucas	44 hr
Jun 26, 3:59 PM CDT	River Flood Warning	DMX	Polk	29 hr
Jun 26, 4:20 PM CDT	Areal Flood Warning	DMX	Monroe	5 hr
Jun 26, 5:43 PM CDT	River Flood Warning	DMX	Mahaska, Marion	46 hr

Nearby

Flash Flood Warnings in Iowa, 2008 Every flash flood warning in 2008

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.