Alert archive / Iowa / Flash Flood Warnings in 2008

Flash Flood Warning 92, NWS Des Moines, IA

June 11, 2008Boone County, Dallas County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 11, 2008, 10:26 PM CDT for Boone County, Dallas County, Iowa. It was in force for 6 hr. 5 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 11, 2008, 10:26 PM CDT (03:26 UTC)
Expired: Jun 12, 2008, 4:30 AM 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

The radar

The Des Moines radar (KDMX), 23 km from the middle of the area, began a volume at 03:26 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 11, 11:20 PM CDT	FLASH FLOOD	2 W Dallas Center, IA	WATER FLOWING OVER HIGHWAY 44.
Jun 11, 11:45 PM CDT	HEAVY RAIN 2.2	Woodward, IA
Jun 12, 12:20 AM CDT	FLASH FLOOD	3 Wsw Minburn, IA	4 TO 5 INCHES OF WATER FLOWING OVER THE ROAD.
Jun 12, 1:09 AM CDT	FLASH FLOOD	1 W Dallas Center, IA	4 INCHES OF WATER FLOWING OVER HIGHWAY 44...100 YDS LONG.
Jun 12, 1:10 AM CDT	FLASH FLOOD	1 W Granger, IA	WATER OVER THE RAOD ON COUNTY ROAD F31.

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 54 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 00:00Z, 3.4 hours before the alert went out and 206 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: 1641 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1105 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 249 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 8.7

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KDMX 120326
FFWDMX
IAC015-049-120930-
/O.NEW.KDMX.FF.W.0092.080612T0326Z-080612T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1026 PM CDT WED JUN 11 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...

* UNTIL 430 AM CDT THURSDAY

* AT 1021 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WOODWARD...
  PERRY...ADEL...WAUKEE...OGDEN...MADRID AND BOONE

ADDITIONAL RAINFALL AMOUNTS OF 2 INCHES ARE POSSIBLE IN THE WARNED 
AREA. STREET FLOODING HAS BEEN REPORTED IN OGDEN AND BOONE.

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. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4186 9428 4186 9416 4220 9416 4220 9371
      4186 9375 4186 9382 4160 9382 4159 9379
      4151 9380 4150 9425
TIME...MOT...LOC 0326Z 180DEG 0KT 4169 9389

$$

ALBRECHT

7 follow-up statements

000 
WGUS73 KDMX 120440
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1137 PM CDT WED JUN 11 2008

IAC015-049-120930-
/O.CON.KDMX.FF.W.0092.000000T0000Z-080612T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-DALLAS IA-
1137 PM CDT WED JUN 11 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR
DALLAS AND BOONE COUNTIES...

AT 1132 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF THUNDERSTORM PRODUCING FLASH FLOODING OVER THE 
WARNED AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BOONE 
BOONE...WOODWARD...PERRY...OGDEN...MADRID...ADEL...DALLAS CENTER AND 
WAUKEE

AT 1120 PM CDT...LAW ENFORCEMENT REPORTED WATER OVER THE ROAD ON HWY 
44 TWO MILES WEST OF DALLAS CENTER.

AT 1140 PM CDT...SIGNIFICANT STREET FLOODING CONTINUED IN THE CITY 
OF BOONE. 

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. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4186 9428 4186 9416 4220 9416 4220 9371
      4186 9375 4186 9382 4160 9382 4159 9379
      4151 9380 4150 9425
TIME...MOT...LOC 0437Z 180DEG 0KT 4169 9389

$$

ALBRECHT

000 
WGUS73 KDMX 120539
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1237 AM CDT THU JUN 12 2008

IAC015-049-120930-
/O.CON.KDMX.FF.W.0092.000000T0000Z-080612T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-DALLAS IA-
1237 AM CDT THU JUN 12 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR
DALLAS AND BOONE COUNTIES...

AT 1236 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE FLASH FLOODING OVER THE WARNED AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BOONE 
BOONE...WOODWARD...PERRY...OGDEN...MADRID...ADEL...DALLAS CENTER AND 
WAUKEE

EARLIER REPORTS OF SIGNIFICANT STREET FLOODING CONTINUED IN THE CITY 
OF BOONE.

AT 1220 AM CDT...DALLAS COUNTY EMERGENCY MANAGEMENT REPORTED 
NUMEROUS ROADS UNDER WATER...8 MILES SOUTH OF PERRY...WATER OVER THE 
ROAD 4-5 FEET DEEP...AT 210TH ST AND COUNTY ROAD ON P58...AND 3 
MILES SOUTH OF MADRID ON T17 THE WATER IS 5 FEET DEEP...IN ADDITION 
TO THE EARLIER REPORT OF WATER OVER THE HWY 44 TWO MILES WEST OF 
DALLAS CENTER.

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. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4186 9428 4186 9416 4220 9416 4220 9371
      4186 9375 4186 9382 4160 9382 4159 9379
      4151 9380 4150 9425
TIME...MOT...LOC 0537Z 180DEG 0KT 4169 9389

$$

ALBRECHT

000 
WGUS73 KDMX 120545
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1245 AM CDT THU JUN 12 2008

IAC015-049-120930-
/O.CON.KDMX.FF.W.0092.000000T0000Z-080612T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-DALLAS IA-
1245 AM CDT THU JUN 12 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR
DALLAS AND BOONE COUNTIES...

AT 1241 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE FLASH FLOODING OVER THE WARNED AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BOONE 
BOONE...WOODWARD...PERRY...OGDEN...MADRID...ADEL...DALLAS CENTER AND 
WAUKEE

EARLIER REPORTS OF SIGNIFICANT STREET FLOODING CONTINUED IN THE CITY 
OF BOONE.

AT 1220 AM CDT...DALLAS COUNTY EMERGENCY MANAGEMENT REPORTED 
NUMEROUS ROADS UNDER WATER...8 MILES SOUTH OF PERRY...WATER OVER THE 
ROAD 5 INCHES DEEP...AT 210TH ST AND COUNTY ROAD ON P58...AND 3 
MILES SOUTH OF MADRID ON T17 THE WATER IS 5 FEET DEEP...IN ADDITION 
TO THE EARLIER REPORT OF WATER OVER THE HWY 44 TWO MILES WEST OF 
DALLAS CENTER.

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. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4186 9428 4186 9416 4220 9416 4220 9371
      4186 9375 4186 9382 4160 9382 4159 9379
      4151 9380 4150 9425
TIME...MOT...LOC 0545Z 180DEG 0KT 4169 9389

$$

ALBRECHT

000 
WGUS73 KDMX 120610
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
108 AM CDT THU JUN 12 2008

IAC015-049-120930-
/O.CON.KDMX.FF.W.0092.000000T0000Z-080612T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-DALLAS IA-
108 AM CDT THU JUN 12 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR
DALLAS AND BOONE COUNTIES...

AT 106 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED
AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BOONE 
BOONE...WOODWARD...PERRY...OGDEN...MADRID...ADEL...DALLAS CENTER AND 
WAUKEE

EARLIER REPORTS OF SIGNIFICANT STREET FLOODING CONTINUED IN THE CITY 
OF BOONE.

DALLAS COUNTY EMERGENCY MANAGEMENT CONTINUES TO REPORT NUMEROUS 
ROADS UNDER WATER...8 MILES SOUTH OF PERRY...WATER OVER THE ROAD 5 
INCHES DEEP...AT 210TH ST AND COUNTY ROAD ON P58...AND 3 MILES SOUTH 
OF MADRID ON T17 THE WATER IS 5 INCHES DEEP...IN ADDITION TO 4 
INCHES DEEP OF WATER OVER HWY 44 ONE TO TWO MILES WEST OF DALLAS 
CENTER. WATER IS ALSO OVER THE ROAD WEST OF GRANGER ON 31 NEAR 
BEAVER CREEK. 

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. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4186 9428 4186 9416 4220 9416 4220 9371
      4186 9375 4186 9382 4160 9382 4159 9379
      4151 9380 4150 9425
TIME...MOT...LOC 0608Z 180DEG 0KT 4169 9389

$$

ALBRECHT

000 
WGUS73 KDMX 120643
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
142 AM CDT THU JUN 12 2008

IAC015-049-120930-
/O.CON.KDMX.FF.W.0092.000000T0000Z-080612T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-DALLAS IA-
142 AM CDT THU JUN 12 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR
DALLAS AND BOONE COUNTIES...

AT 141 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE FLASH FLOODING OVER THE WARNED AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BOONE 
BOONE...WOODWARD...PERRY...OGDEN...MADRID...ADEL...DALLAS CENTER AND 
WAUKEE

EARLIER REPORTS OF SIGNIFICANT STREET FLOODING CONTINUED IN THE CITY 
OF BOONE.

DALLAS COUNTY EMERGENCY MANAGEMENT CONTINUES TO REPORT NUMEROUS 
ROADS UNDER WATER...8 MILES SOUTH OF PERRY...WATER OVER THE ROAD 5 
INCHES DEEP...AT 210TH ST AND COUNTY ROAD ON P58...AND 3 MILES SOUTH 
OF MADRID ON T17 THE WATER IS 5 INCHES DEEP...IN ADDITION TO 4 
INCHES DEEP OF WATER OVER HWY 44 ONE TO TWO MILES WEST OF DALLAS 
CENTER. WATER IS ALSO OVER THE ROAD WEST OF GRANGER ON F31 NEAR 
BEAVER CREEK. 

ALTHOUGH THE HEAVY RAIN HAS ENDED...LIGHT TO MODERATE RAIN WILL 
BRING AN ADDITIONAL HALF TO THREE-QUARTERS OF AN INCH OF RAINFALL TO 
MUCH OF THE WARNED AREA THROUGH THE OVERNIGHT HOURS. 

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. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4186 9428 4186 9416 4220 9416 4220 9371
      4186 9375 4186 9382 4160 9382 4159 9379
      4151 9380 4150 9425
TIME...MOT...LOC 0642Z 180DEG 0KT 4169 9389

$$

ALBRECHT

000 
WGUS73 KDMX 120914
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
411 AM CDT THU JUN 12 2008

IAC015-049-120930-
/O.CON.KDMX.FF.W.0092.000000T0000Z-080612T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-DALLAS IA-
411 AM CDT THU JUN 12 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR
DALLAS AND BOONE COUNTIES...

AT 410 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED A
THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED AREA.

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

DALLAS COUNTY EMERGENCY MANAGEMENT CONTINUES TO REPORT NUMEROUS 
ROADS UNDER WATER...8 MILES SOUTH OF PERRY...WATER OVER THE ROAD 5 
INCHES DEEP...AT 210TH ST AND COUNTY ROAD ON P58...AND 3 MILES SOUTH 
OF MADRID ON HIGHWAY 17 THE WATER IS 5 INCHES DEEP...IN ADDITION TO 
4 INCHES DEEP OF WATER OVER HWY 44 ONE TO TWO MILES WEST OF DALLAS 
CENTER. WATER IS ALSO OVER THE ROAD WEST OF GRANGER ON F31 NEAR 
BEAVER CREEK. 

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

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 4186 9428 4186 9416 4220 9416 4220 9371
      4186 9375 4186 9382 4160 9382 4159 9379
      4151 9380 4150 9425
TIME...MOT...LOC 0911Z 180DEG 0KT 4169 9389

$$

000 
WGUS73 KDMX 120932
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
432 AM CDT THU JUN 12 2008

IAC015-049-120942-
/O.EXP.KDMX.FF.W.0092.000000T0000Z-080612T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BOONE IA-DALLAS IA-
432 AM CDT THU JUN 12 2008

...THE FLASH FLOOD WARNING HAS EXPIRED FOR DALLAS AND BOONE
COUNTIES...

ALTHOUGH THE FLASH FLOOD WARNINGS HAVE EXPIRED...FLOODING WILL 
CONTINUE AND A FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS 
REMAINS IN EFFECT UNTIL 845 AM.  

LAT...LON 4186 9428 4186 9416 4220 9416 4220 9371
      4186 9375 4186 9382 4160 9382 4159 9379
      4151 9380 4150 9425
TIME...MOT...LOC 0914Z 180DEG 0KT 4169 9389

$$

RUSSELL

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 11, 6:48 PM CDT, 3 hours 38 minutes earlier.

Area forecast discussion, Jun 11, 6:48 PM CDT, 3 hours 38 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
648 PM CDT WED JUN 11 2008

.DISCUSSION...
LARGE MID-LEVEL CYCLONE SITS OVER NORTHERN ROCKIES WITH SHORTWAVE
SWINGING AROUND ITS SOUTHERN PERIPHERY EVIDENT ON WV IMAGERY. SFC
ANALYSIS SHOWS LOW PRESSURE NEARLY STATIONARY IN EASTERN SD WITH
WARM/STATIONARY FRONT STRETCHED ACROSS SOUTHERN MN AND WI...AND COLD
FRONT EXTENDING THROUGH EASTERN NE AND CENTRAL/WESTERN KS. DEEP
SOUTHERLY FLOW IN THE WARM SECTOR HAS ALLOWED LOW-LEVEL MOISTURE TO
POOL UP ACROSS OUR AREA...WITH DEWPOINTS NOW IN THE MID/UPPER 60S
ACROSS THE SOUTHERN 2/3 OF THE STATE. SKIES HAVE LARGELY CLEARED OUT
BEHIND EARLIER CONVECTIVE CLUSTER AND ARE NOW PARTLY CLOUDY OVER
MUCH OF CENTRAL IOWA...ALLOWING TEMPERATURES TO RISE INTO THE LOWER
80S IN SOME LOCATIONS.

WITH THE INCREASE IN LOW-LEVEL MOISTURE AND WARM AIR INSTABILITY IS
INCREASING SIGNIFICANTLY. WIND SHEAR ALSO HIGH WITH SWERLY FLOW
ALOFT AND AN 850 MB JET OVER WESTERN IA. AS THE MID-LEVEL SHORTWAVE
REVOLVES AROUND THE SOUTHEASTERN PERIPHERY OF THE LOW THIS
EVENING...IT WILL KICK THE SURFACE LOW NORTHEAST BRINGING THE COLD
FRONT THROUGH CENTRAL IA OVERNIGHT. FIRST THREAT WILL BE ISOLATED
CONVECTION IN THE WARM SECTOR WELL AHEAD OF THE FRONT THIS
EVENING/EARLY TONIGHT...HOWEVER IT APPEARS THAT WARM AIR ABOVE THE
SFC WILL PROVIDE SUFFICIENT CAP TO KEEP THIS IN CHECK. ANYTHING THAT
DOES DEVELOP IN THIS TIMEFRAME WILL HAVE A GOOD CHANCE OF GOING
SEVERE GIVEN THE ENVIRONMENT. STORMS ALONG AND JUST AHEAD OF THE
COLD FRONT WILL ENTER OUR AREA BETWEEN 00Z AND 04Z...MOVING ACROSS
THROUGH THE NIGHT. PRIMARY SEVERE THREAT WILL BE NWERN HALF OF
CWA...WITH CONVECTION TRANSITIONING TO ELEVATED AND SEVERE THREAT
DIMINISHING BUT STILL PRESENT AFTER ABOUT MIDNIGHT. QPF DIFFICULT TO
PIN DOWN TONIGHT...BUT HEAVY RAIN WILL BE WIDESPREAD WITH THE
HIGHEST AMOUNTS LIKELY EARLIER IN THE NIGHT ACROSS THE NORTHWEST.

FRONT WILL MOVE SOUTHEAST ACROSS IA ON THU AND MAY SEE ADNL TSRA
DURING THE AFTERNOON OVER THE SERN THIRD. THAT SHOULD MOVE SE OF
THE CWA BY SNST AND EXPECT IA TO MISS MOST OF THE CWA. PTRN CHNG
WILL GIVE IA A BREAK FRM THE ACTIVE WX FOR ABOUT A WEEK AS THE OVR
ALL PTRN BASICALLY SHIFTS 180 DEGREES. SOME PCPN ON TAP FOR THE
SUN INTO MON TIMEFRAME, BUT NOT AS WDSPRD OR HEAVY AS HAS BEEN THE
CASE OF LATE.

&&

.AVIATION...12/00Z
SVR SQUALL LINE ENTERING WRN IA WILL BE THE MAIN WX FEAT WITH THIS
SET.  TIMED THE SYS ACRS THE CWA OVR NGT WITH IT REACHING KFOD BY
AROUND 02Z AND KOTM ARND 08Z.  MAIN AREA LKLY TO LAST ABOUT 2 HRS
WITH SOME -TSRA AFT MAIN LINE.  OUTSIDE OF TSRA, GENL VFR CONDS WILL
HOLD THRU FCST PD.  WILL BE A CHANCE OF REDEVELOPMENT OVR THE SERN
TAFS BY THE MID DAY PERIOD ON THU...WITH ENTIRE AREA SHIFTING SWD BY
END OF TAF PD.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH THROUGH THURSDAY AFTERNOON FOR ADAIR-ADAMS-
AUDUBON-BLACK HAWK-BOONE-BREMER-BUTLER-CALHOUN-CARROLL-CASS-
CERRO GORDO-CRAWFORD-DALLAS-EMMET-FRANKLIN-GREENE-GRUNDY-GUTHRIE-
HAMILTON-HANCOCK-HARDIN-HUMBOLDT-JASPER-KOSSUTH-MADISON-MARSHALL-
PALO ALTO-POCAHONTAS-POLK-POWESHIEK-SAC-STORY-TAMA-TAYLOR-UNION-
WEBSTER-WINNEBAGO-WORTH-WRIGHT.

&&

MS JUN 08

Hazardous weather outlook, Jun 11, 3:48 PM CDT, 6 hours 38 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
348 PM CDT WED JUN 11 2008

IAZ026>028-037>039-048>050-060>062-072>075-082>086-093>097-122100-
FRANKLIN-BUTLER-BREMER-HARDIN-GRUNDY-BLACK HAWK-STORY-MARSHALL-
TAMA-POLK-JASPER-POWESHIEK-MADISON-WARREN-MARION-MAHASKA-UNION-
CLARKE-LUCAS-MONROE-WAPELLO-RINGGOLD-DECATUR-WAYNE-APPANOOSE-
DAVIS-
348 PM CDT WED JUN 11 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TONIGHT

STRONG THUNDERSTORMS WILL DEVELOP TO THE WEST AND MOVE INTO THE
AREA THIS EVENING. THE STRONG STORMS WILL ADVANCE EAST TO THE
INTERSTATE 35 CORRIDOR BY AROUND MIDNIGHT. ALL MODES OF SEVERE
WEATHER AREA LIKELY THIS EVENING. WIDESPREAD HEAVY RAIN IS ALSO
LIKELY WITH THESE STORMS.

NUMEROUS AREAL AND RIVER FLOOD WARNINGS ARE IN EFFECT ACROSS
CENTRAL IOWA. FOR ADDITIONAL INFORMATION PLEASE REFER TO THE
NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE WILL BE A CHANCE FOR THUNDERSTORMS LINGERING INTO THURSDAY
EVENING. THERE WILL BE ANOTHER CHANCE FOR THUNDERSTORMS EARLY
FRIDAY AND A BETTER CHANCE FOR STORMS ON SUNDAY INTO MONDAY. THE
SEVERE WEATHER POTENTIAL AT THIS TIME LOOKS TO BE MINIMAL WHILE
THE HEAVY RAIN POTENTIAL HAS YET TO BE DETERMINED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY FOR A TWO TO THREE HOUR PERIOD FROM
THE BEGINNING OF THE THUNDERSTORMS THIS EVENING...AND IS NOT
EXPECTED THURSDAY.

IAZ004>007-015>017-023>025-033>036-044>047-057>059-070-071-081-
092-122100-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-SAC-CALHOUN-WEBSTER-HAMILTON-CRAWFORD-
CARROLL-GREENE-BOONE-AUDUBON-GUTHRIE-DALLAS-CASS-ADAIR-ADAMS-
TAYLOR-
348 PM CDT WED JUN 11 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TONIGHT

STRONG THUNDERSTORMS WILL DEVELOP AND MOVE INTO WESTERN IOWA THIS
EVENING. THE STORMS WILL ADVANCE TO THE INTERSTATE 35 CORRIDOR BY
AROUND MIDNIGHT...AND ACROSS OUR AREA BETWEEN MIDNIGHT AND 5 AM.
THE MAIN SEVERE WEATHER THIRD WILL BE FOR HAIL AND HIGH WINDS.
WIDESPREAD HEAVY RAIN IS ALSO LIKELY WITH THESE STORMS.

NUMEROUS AREAL AND RIVER FLOOD WARNINGS ARE IN EFFECT ACROSS
CENTRAL IOWA. FOR ADDITIONAL INFORMATION PLEASE REFER TO THE
NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE WILL BE A CHANCE FOR THUNDERSTORMS LINGERING INTO EARLY
FRIDAY. SEVERE THUNDERSTORMS WILL BE POSSIBLE SOUTHEAST OF A
LAMONI TO TAMA LINE DURING THE AFTERNOON THURSDAY. A BETTER CHANCE
FOR STORMS WILL ARRIVE ON SUNDAY INTO MONDAY. THE SEVERE WEATHER
POTENTIAL AT THIS TIME LOOKS TO BE MINIMAL WHILE THE HEAVY RAIN
POTENTIAL HAS YET TO BE DETERMINED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS POSSIBLE FROM AROUND MIDNIGHT THROUGH THE
PREDAWN HOURS...AND POSSIBLY THURSDAY AFTERNOON.

In the hours before

Local storm report, Jun 11, 9:37 PM CDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
937 PM CDT WED JUN 11 2008

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

0900 PM     FLASH FLOOD      1 S MALLARD             42.93N 94.68W
06/11/2008                   PALO ALTO          IA   LAW ENFORCEMENT

            WATER REPORTED TO BE OVER HIGHWAY 4 SOUTH OF MALLARD.

&&

KJ

Local storm report, Jun 11, 9:47 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
947 PM CDT WED JUN 11 2008

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

0926 PM     HAIL             1 SE FARNHAMVILLE       42.26N 94.40W
06/11/2008  M0.88 INCH       WEBSTER            IA   TRAINED SPOTTER

&&

PODRAZIK

Local storm report, Jun 11, 9:57 PM CDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL W

Local storm report, Jun 11, 10:03 PM CDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1003 PM CDT WED JUN 11 2008

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

0957 PM     FLASH FLOOD      FORT DODGE              42.51N 94.18W
06/11/2008                   WEBSTER            IA   TRAINED SPOTTER

            STREET FLOODING IN FORT DODGE. WATER UP TO 6 INCHES DEEP
            STANDING ON LOW LYING PORTIONS OF HWY 7 NEAR FORT DODGE.

&&

KJ

Local storm report, Jun 11, 10:05 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1005 PM CDT WED JUN 11 2008

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

0954 PM     TSTM WND GST     1 E GRAND JUNCTION      42.03N 94.22W
06/11/2008  E65 MPH          GREENE             IA   EMERGENCY MNGR

&&

PODRAZIK

Local storm report, Jun 11, 10:06 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1006 PM CDT WED JUN 11 2008

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

0956 PM     HAIL             3 ESE DANA              42.08N 94.19W
06/11/2008  M1.00 INCH       GREENE             IA   EMERGENCY MNGR

&&

PODRAZIK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 7:12 PM CDT	Tornado Warning	DMX	Emmet, Palo Alto	48 min
Jun 11, 7:29 PM CDT	Tornado Warning	DMX	Emmet, Palo Alto	46 min
Jun 11, 7:39 PM CDT	Tornado Warning	DMX	Crawford	18 min
Jun 11, 7:41 PM CDT	Tornado Warning	DMX	Palo Alto, Pocahontas	34 min
Jun 11, 7:46 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	44 min
Jun 11, 7:53 PM CDT	Tornado Warning	DMX	Crawford	52 min
Jun 11, 7:59 PM CDT	Flash Flood Warning	DMX	Crawford	6 hr
Jun 11, 8:02 PM CDT	Tornado Warning	DMX	Sac	28 min
Jun 11, 8:08 PM CDT	Flash Flood Warning	DMX	Palo Alto, Pocahontas	6 hr
Jun 11, 8:12 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	48 min
Jun 11, 8:15 PM CDT	Tornado Warning	DMX	Palo Alto, Pocahontas	45 min
Jun 11, 8:17 PM CDT	Tornado Warning	DMX	Audubon, Carroll	43 min
Jun 11, 8:26 PM CDT	Tornado Warning	DMX	Palo Alto, Pocahontas	34 min
Jun 11, 8:31 PM CDT	Tornado Warning	DMX	Carroll	29 min
Jun 11, 8:33 PM CDT	Tornado Warning	DMX	Kossuth	42 min
Jun 11, 8:48 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Greene	27 min
Jun 11, 8:48 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Sac	57 min
Jun 11, 8:52 PM CDT	Flash Flood Warning	DMX	Sac	6 hr
Jun 11, 8:59 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Cass	46 min
Jun 11, 8:59 PM CDT	Tornado Warning	DMX	Palo Alto, Pocahontas	31 min
Jun 11, 9:06 PM CDT	Flash Flood Warning	DMX	Kossuth	6 hr
Jun 11, 9:10 PM CDT	Severe Thunderstorm Warning	DMX	Webster	50 min
Jun 11, 9:12 PM CDT	Tornado Warning	DMX	Kossuth	33 min
Jun 11, 9:16 PM CDT	Flash Flood Warning	DMX	Audubon, Carroll, Cass	6 hr
Jun 11, 9:18 PM CDT	Severe Thunderstorm Warning	DMX	Greene, Guthrie	42 min
Jun 11, 9:33 PM CDT	Flash Flood Warning	DMX	Cerro Gordo, Worth	6 hr
Jun 11, 9:35 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Winnebago	40 min
Jun 11, 9:37 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth, Winnebago	38 min
Jun 11, 9:54 PM CDT	Severe Thunderstorm Warning	DMX	Boone	36 min
Jun 11, 9:55 PM CDT	Flash Flood Warning	DMX	Adair, Greene, Guthrie, Webster	6 hr
Jun 11, 9:57 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Humboldt, Webster, Wright	48 min
Jun 11, 10:01 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster, Wright	44 min
Jun 11, 10:02 PM CDT	River Flood Warning	DMX	Humboldt	13 hr
Jun 11, 10:21 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock	39 min
Jun 11, 10:26 PM CDT	Severe Thunderstorm Warning	DMX	Story	49 min
Jun 11, 10:32 PM CDT	Severe Thunderstorm Warning	DMX	Hardin	43 min
Jun 11, 10:34 PM CDT	Flash Flood Warning	DMX	Franklin, Hamilton, Story, Wright	6 hr
Jun 11, 10:38 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin	52 min
Jun 11, 11:01 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Grundy	44 min
Jun 11, 11:04 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Marshall, Tama	56 min
Jun 11, 11:08 PM CDT	Flash Flood Warning	DMX	Hancock, Winnebago	6 hr
Jun 11, 11:16 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo	29 min
Jun 11, 11:20 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer	55 min
Jun 11, 11:27 PM CDT	Flash Flood Warning	DMX	Adams	6 hr
Jun 12, 12:08 AM CDT	River Flood Warning	DMX	Cass	21 hr
Jun 12, 12:15 AM CDT	Flash Flood Warning	DMX	Black Hawk, Bremer, Butler, Grundy	6 hr
Jun 12, 12:23 AM CDT	Flash Flood Warning	DMX	Polk	6 hr
Jun 12, 12:28 AM CDT	Flash Flood Warning	DMX	Madison	6 hr
Jun 12, 1:28 AM CDT	Flash Flood Warning	DMX	Marshall, Tama	6 hr
Jun 12, 2:26 AM CDT	Areal Flood Warning	DMX	Palo Alto, Pocahontas	6 hr
Jun 12, 3:06 AM CDT	Areal Flood Warning	DMX	Kossuth	6 hr
Jun 12, 3:22 AM CDT	Areal Flood Warning	DMX	Audubon, Carroll, Cass	5 hr
Jun 12, 3:50 AM CDT	Areal Flood Warning	DMX	Adair, Guthrie	6 hr
Jun 12, 4:05 AM CDT	Severe Thunderstorm Warning	DMX	Decatur, Wayne	40 min
Jun 12, 4:23 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie	23 min
Jun 12, 5:30 AM CDT	Areal Flood Warning	DMX	Adams	3 hr
Jun 12, 6:26 AM CDT	Areal Flood Warning	DMX	Madison	3 hr
Jun 12, 7:00 AM CDT	Areal Flood Warning	DMX	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 26 more	12 hr
Jun 12, 9:39 AM CDT	River Flood Warning	DMX	Decatur	34 hr
Jun 12, 12:21 PM CDT	River Flood Warning	DMX	Story	15 hr
Jun 12, 1:13 PM CDT	River Flood Warning	DMX	Lucas	38 hr
Jun 12, 1:27 PM CDT	River Flood Warning	DMX	Polk	14 hr
Jun 12, 3:04 PM CDT	Areal Flood Warning	DMX	Marion	12 hr
Jun 12, 3:09 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion	29 min
Jun 12, 3:29 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek	27 min
Jun 12, 3:47 PM CDT	Severe Thunderstorm Warning	DMX	Tama	28 min
Jun 12, 3:58 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Poweshiek	27 min
Jun 12, 4:21 PM CDT	Tornado Warning	DMX	Appanoose, Davis	39 min
Jun 12, 4:40 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Wayne	34 min
Jun 12, 4:47 PM CDT	Severe Thunderstorm Warning	DMX	Monroe	32 min
Jun 12, 4:57 PM CDT	Tornado Warning	DMX	Davis	48 min
Jun 12, 5:06 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska	39 min
Jun 12, 5:19 PM CDT	Flash Flood Warning	DMX	Appanoose, Davis, Monroe, Wapello	12 hr
Jun 12, 5:26 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Wayne	14 min
Jun 12, 5:30 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Poweshiek	17 min
Jun 12, 5:36 PM CDT	Severe Thunderstorm Warning	DMX	Monroe	24 min
Jun 12, 5:48 PM CDT	Tornado Warning	DMX	Davis	30 min
Jun 12, 6:56 PM CDT	Areal Flood Warning	DMX	Adair, Adams, Black Hawk, Boone, Bremer, Butler and 17 more	12 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.