Alert archive / Iowa / Flash Flood Watches in 2010
Flash Flood Watch 21, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood watch at Jul 21, 2010, 3:51 PM CDT for 39 counties in Iowa. It took effect at Jul 21, 2010, 7:00 PM CDT. It was in force for 44 hr.
The area
The counties it named.
The facts
- Issued
- Jul 21, 2010, 3:51 PM CDT (20:51 UTC)
- In effect from
- Jul 21, 2010, 7:00 PM CDT
- Expired
- Jul 23, 2010, 2:59 PM CDT
- In force
- 44 hr
- Issued by
- NWS Des Moines, IA
- Flood severity
- None
All 39 counties
Adair County, IA, Audubon County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Crawford County, IA, Dallas County, IA, Emmet County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Jasper County, IA, Kossuth County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Palo Alto County, IA, Pocahontas County, IA, Polk County, IA, Poweshiek County, IA, Sac County, IA, Story County, IA, Tama County, IA, Warren County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 59 km from the middle of the area, began a volume at 20:54 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.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 8.9 hours before the alert went out and 239 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.
- Mixed-layer CAPE
- 1589 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 526 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.7
The text
As transmitted, in the capitals the NWS used until 2016.
781 WGUS63 KDMX 212051 FFADMX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE DES MOINES IA 351 PM CDT WED JUL 21 2010 ...HEAVY RAINFALL EXPECTED OVER CENTRAL AND NORTHERN IOWA TONIGHT... .A STATIONARY FRONT OVER SOUTHERN KANSAS WILL LIFT NORTH TONIGHT WHILE AN UPPER LEVEL STORM CROSSES THE NORTHERN PLAINS. THUNDERSTORMS AND HEAVY RAIN WILL DEVELOP OVER WESTERN IOWA BY LATE EVENING WITH THE STORMS CROSSING NORTHERN AND CENTRAL IOWA OVERNIGHT. AN AREA OF ONE TO THREE INCHES IS LIKELY OVER THE WATCH. LOCALLY HEAVIER RAINFALL TOTALS OF 3 TO 5 INCHES MAY OCCUR IN THE STRONGER THUNDERSTORMS. IAZ033>039-044>050-057>062-070>075-220500- /O.NEW.KDMX.FF.A.0021.100722T0000Z-100722T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAC-CALHOUN-WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD- CARROLL-GREENE-BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE-DALLAS- POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON-WARREN-MARION-MAHASKA- INCLUDING THE CITIES OF...SAC CITY...ROCKWELL CITY...FORT DODGE... WEBSTER CITY...ELDORA...GRUNDY CENTER...WATERLOO...DENISON... CARROLL...JEFFERSON...BOONE...AMES...MARSHALLTOWN...TOLEDO... AUDUBON...GUTHRIE CENTER...ADEL...DES MOINES...NEWTON... GRINNELL...ATLANTIC...GREENFIELD...WINTERSET...INDIANOLA... KNOXVILLE...OSKALOOSA 351 PM CDT WED JUL 21 2010 ...FLASH FLOOD WATCH IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH THURSDAY MORNING... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF CENTRAL IOWA...NORTHEAST IOWA...SOUTH CENTRAL IOWA...SOUTHWEST IOWA AND WEST CENTRAL IOWA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA... BOONE...DALLAS...GRUNDY...HAMILTON...HARDIN...JASPER... MARSHALL...POLK...POWESHIEK...STORY...TAMA AND WEBSTER. IN NORTHEAST IOWA...BLACK HAWK. IN SOUTH CENTRAL IOWA...MADISON... MAHASKA...MARION AND WARREN. IN SOUTHWEST IOWA...ADAIR AND CASS. IN WEST CENTRAL IOWA...AUDUBON...CALHOUN...CARROLL... CRAWFORD...GREENE...GUTHRIE AND SAC. * FROM 7 PM CDT THIS EVENING THROUGH THURSDAY MORNING * THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO IMPACT THE AREA OVERNIGHT. THE HEAVIEST RAIN IS EXPECTED BETWEEN HIGHWAY 18 AND HIGHWAY 30 BUT MAY EXTEND AS FAR SOUTH AS HIGHWAY 92. LOCATIONS NORTH OF HIGHWAY 20 MAY RECEIVE HEAVY RAINFALL BUT THE RISK OF FLASH FLOODING IS LESS DUE TO DRIER SOIL CONDITIONS. * AREAS RECEIVING 3 TO 5 INCHES OF RAINFALL MAY EXPERIENCE BOTH URBAN AND RURAL FLOODING WITH CREEKS...STREAMS...AND SMALL RIVER RISING RAPIDLY. STREET FLOODING WILL ALSO OCCUR AT LOCATIONS PRONE TO FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ REV
10 follow-up statements
338 WGUS63 KDMX 220223 FFADMX FLOOD WATCH NATIONAL WEATHER SERVICE DES MOINES IA 923 PM CDT WED JUL 21 2010 ...HEAVY RAINFALL EXPECTED OVER PORTIONS OF CENTRAL AND NORTHERN IOWA TONIGHT... .A STATIONARY FRONT OVER SOUTHERN KANSAS WILL LIFT NORTH TONIGHT WHILE AN UPPER LEVEL STORM CROSSES THE NORTHERN PLAINS. THUNDERSTORMS WITH HEAVY RAIN ARE EXPECTED OVER MUCH OF CENTRAL AND NORTHERN IOWA LATE TONIGHT AS AMPLE MOISTURE STREAMS INTO THE STATE. IAZ033>039-044>050-057>062-070>075-221000- /O.CON.KDMX.FF.A.0021.000000T0000Z-100722T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAC-CALHOUN-WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD- CARROLL-GREENE-BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE-DALLAS- POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON-WARREN-MARION-MAHASKA- INCLUDING THE CITIES OF...SAC CITY...ROCKWELL CITY...FORT DODGE... WEBSTER CITY...ELDORA...GRUNDY CENTER...WATERLOO...DENISON... CARROLL...JEFFERSON...BOONE...AMES...MARSHALLTOWN...TOLEDO... AUDUBON...GUTHRIE CENTER...ADEL...DES MOINES...NEWTON... GRINNELL...ATLANTIC...GREENFIELD...WINTERSET...INDIANOLA... KNOXVILLE...OSKALOOSA 923 PM CDT WED JUL 21 2010 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY MORNING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF CENTRAL IOWA...NORTHEAST IOWA...SOUTH CENTRAL IOWA...SOUTHWEST IOWA AND WEST CENTRAL IOWA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA...BOONE...DALLAS...GRUNDY... HAMILTON...HARDIN...JASPER...MARSHALL...POLK...POWESHIEK... STORY...TAMA AND WEBSTER. IN NORTHEAST IOWA...BLACK HAWK. IN SOUTH CENTRAL IOWA...MADISON...MAHASKA...MARION AND WARREN. IN SOUTHWEST IOWA...ADAIR AND CASS. IN WEST CENTRAL IOWA... AUDUBON...CALHOUN...CARROLL...CRAWFORD...GREENE...GUTHRIE AND SAC. * THROUGH THURSDAY MORNING * THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO IMPACT THE AREA OVERNIGHT. THE HEAVIEST RAIN IS EXPECTED BETWEEN HIGHWAY 18 AND HIGHWAY 30 BUT MAY EXTEND AS FAR SOUTH AS HIGHWAY 92. LOCATIONS NORTH OF HIGHWAY 20 MAY RECEIVE HEAVY RAINFALL BUT THE RISK OF FLASH FLOODING IS LESS DUE TO DRIER SOIL CONDITIONS. * AREAS RECEIVING 3 TO 5 INCHES OF RAINFALL MAY EXPERIENCE BOTH URBAN AND RURAL FLASH FLOODING WITH CREEKS...STREAMS...AND SMALL RIVER RISING RAPIDLY. STREET FLOODING WILL ALSO OCCUR AT LOCATIONS PRONE TO FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ CC
566 WGUS63 KDMX 220534 FFADMX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE DES MOINES IA 1234 AM CDT THU JUL 22 2010 ...HEAVY RAINFALL EXPECTED OVER PORTIONS OF CENTRAL AND NORTHERN IOWA OVERNIGHT INTO THURSDAY MORNING... .A STATIONARY FRONT OVER SOUTHERN KANSAS WILL LIFT NORTH TONIGHT WHILE AN UPPER LEVEL STORM CROSSES THE NORTHERN PLAINS. THUNDERSTORMS WITH HEAVY RAIN ARE EXPECTED OVER MUCH OF NORTHERN HALF OF IOWA LATE TONIGHT AS AMPLE MOISTURE STREAMS INTO THE STATE. IAZ004>007-015>017-023>028-221300- /O.EXA.KDMX.FF.A.0021.000000T0000Z-100722T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER- INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY... NORTHWOOD...EMMETSBURG...GARNER...MASON CITY...POCAHONTAS... HUMBOLDT...CLARION...HAMPTON...ALLISON...WAVERLY 1234 AM CDT THU JUL 22 2010 ...FLASH FLOOD WATCH IN EFFECT UNTIL NOON CDT TODAY... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS EXPANDED THE * FLASH FLOOD WATCH TO INCLUDE PORTIONS OF NORTH CENTRAL IOWA... NORTHEAST IOWA AND NORTHWEST IOWA...INCLUDING THE FOLLOWING AREAS...IN NORTH CENTRAL IOWA...BUTLER...CERRO GORDO... FRANKLIN...HANCOCK...HUMBOLDT...KOSSUTH...WINNEBAGO...WORTH AND WRIGHT. IN NORTHEAST IOWA...BREMER. IN NORTHWEST IOWA... EMMET...PALO ALTO AND POCAHONTAS. * UNTIL NOON CDT TODAY * THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO IMPACT THE AREA OVERNIGHT INTO THURSDAY MORNING. RAINFALL RATES OF UP TO 3 INCHES AND HOUR AT TIME WILL BE POSSIBLE ALONG WITH GENERALIZED RAINFALL OF 3 TO 5 INCHES IN THE WATCH AREA. * AREAS RECEIVING 3 TO 5 INCHES OF RAINFALL MAY EXPERIENCE BOTH URBAN AND RURAL FLASH FLOODING WITH CREEKS...STREAMS...AND SMALL RIVER RISING RAPIDLY. STREET FLOODING WILL ALSO OCCUR AT LOCATIONS PRONE TO FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ IAZ033>039-044>050-057>062-070>075-221300- /O.CON.KDMX.FF.A.0021.000000T0000Z-100722T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAC-CALHOUN-WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD- CARROLL-GREENE-BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE-DALLAS- POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON-WARREN-MARION-MAHASKA- INCLUDING THE CITIES OF...SAC CITY...ROCKWELL CITY...FORT DODGE... WEBSTER CITY...ELDORA...GRUNDY CENTER...WATERLOO...DENISON... CARROLL...JEFFERSON...BOONE...AMES...MARSHALLTOWN...TOLEDO... AUDUBON...GUTHRIE CENTER...ADEL...DES MOINES...NEWTON... GRINNELL...ATLANTIC...GREENFIELD...WINTERSET...INDIANOLA... KNOXVILLE...OSKALOOSA 1234 AM CDT THU JUL 22 2010 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL NOON CDT TODAY... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF CENTRAL IOWA...NORTHEAST IOWA...SOUTH CENTRAL IOWA...SOUTHWEST IOWA AND WEST CENTRAL IOWA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA...BOONE...DALLAS...GRUNDY... HAMILTON...HARDIN...JASPER...MARSHALL...POLK...POWESHIEK... STORY...TAMA AND WEBSTER. IN NORTHEAST IOWA...BLACK HAWK. IN SOUTH CENTRAL IOWA...MADISON...MAHASKA...MARION AND WARREN. IN SOUTHWEST IOWA...ADAIR AND CASS. IN WEST CENTRAL IOWA... AUDUBON...CALHOUN...CARROLL...CRAWFORD...GREENE...GUTHRIE AND SAC. * UNTIL NOON CDT TODAY * THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO IMPACT THE AREA OVERNIGHT INTO THURSDAY MORNING. RAINFALL RATES OF UP TO 3 INCHES PER HOUR WILL BE POSSIBLE WITH GENERALIZED RAINFALL OF 2 TO 5 INCHES WITH LOCALIZED HIGHER AMOUNTS. * AREAS RECEIVING OVER 3 INCHES OF RAINFALL MAY EXPERIENCE BOTH URBAN AND RURAL FLASH FLOODING WITH CREEKS...STREAMS...AND SMALL RIVER RISING RAPIDLY. STREET FLOODING WILL ALSO OCCUR AT LOCATIONS PRONE TO FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$
822 WGUS63 KDMX 220905 FFADMX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE DES MOINES IA 405 AM CDT THU JUL 22 2010 ...HEAVY RAINFALL EXPECTED TO CONTINUE THIS MORNING...AND THEN RE- DEVELOP LATE THIS AFTERNOON AND TONIGHT OVER NORTHERN IOWA... .NUMEROUS THUNDERSTORMS WILL PERSIST ACROSS NORTHERN IOWA AS AN UPPER LEVEL DISTURBANCE RIDES ALONG A STATIONARY FRONT EXTENDING OVER NORTHERN IOWA TODAY. LOOK FOR ANOTHER DISTURBANCE TO RIDE ALONG THIS SAME BOUNDARY AGAIN THIS EVENING AND PROVIDE ADDITIONAL ROUNDS OF HEAVY THUNDERSTORMS OVER NORTHERN IOWA. IAZ004>007-015>017-023>028-033>039-221715- /O.EXT.KDMX.FF.A.0021.000000T0000Z-100723T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK- INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY... NORTHWOOD...EMMETSBURG...GARNER...MASON CITY...POCAHONTAS... HUMBOLDT...CLARION...HAMPTON...ALLISON...WAVERLY...SAC CITY... ROCKWELL CITY...FORT DODGE...WEBSTER CITY...ELDORA... GRUNDY CENTER...WATERLOO 405 AM CDT THU JUL 22 2010 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH THIS EVENING... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF CENTRAL IOWA...NORTH CENTRAL IOWA...NORTHEAST IOWA...NORTHWEST IOWA AND WEST CENTRAL IOWA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA...GRUNDY...HAMILTON...HARDIN AND WEBSTER. IN NORTH CENTRAL IOWA...BUTLER...CERRO GORDO... FRANKLIN...HANCOCK...HUMBOLDT...KOSSUTH...WINNEBAGO...WORTH AND WRIGHT. IN NORTHEAST IOWA...BLACK HAWK AND BREMER. IN NORTHWEST IOWA...EMMET...PALO ALTO AND POCAHONTAS. IN WEST CENTRAL IOWA...CALHOUN AND SAC. * THROUGH THIS EVENING * NUMEROUS THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO IMPACT THE AREA THROUGH THE MORNING HOURS TODAY. RAINFALL RATES OF UP TO 3 INCHES PER HOUR AT TIMES AND GENERALIZED RAINFALL AMOUNTS OF 3 TO 6 INCHES WITHIN THE WATCH AREA ARE POSSIBLE. * IN ADDITION...ANOTHER ROUND OF THUNDERSTORMS ARE ANTICIPATED TO DEVELOP OVER THE AREA LATE THIS AFTERNOON THROUGH THE EVENING HOURS...WITH HEAVY RAIN POTENTIAL AGAIN. * AREAS RECEIVING 3 TO 5 INCHES OF RAINFALL MAY EXPERIENCE BOTH URBAN AND RURAL FLASH FLOODING WITH CREEKS...STREAMS...AND SMALL RIVER RISING RAPIDLY. STREET FLOODING WILL ALSO OCCUR AT LOCATIONS PRONE TO FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ PODRAZIK IAZ044>050-057>062-070>075-221700- /O.CON.KDMX.FF.A.0021.000000T0000Z-100722T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE- DALLAS-POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON-WARREN-MARION- MAHASKA- INCLUDING THE CITIES OF...DENISON...CARROLL...JEFFERSON...BOONE... AMES...MARSHALLTOWN...TOLEDO...AUDUBON...GUTHRIE CENTER...ADEL... DES MOINES...NEWTON...GRINNELL...ATLANTIC...GREENFIELD... WINTERSET...INDIANOLA...KNOXVILLE...OSKALOOSA 405 AM CDT THU JUL 22 2010 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL NOON CDT TODAY... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF CENTRAL IOWA...SOUTH CENTRAL IOWA...SOUTHWEST IOWA AND WEST CENTRAL IOWA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA...BOONE...DALLAS...JASPER...MARSHALL...POLK... POWESHIEK...STORY AND TAMA. IN SOUTH CENTRAL IOWA...MADISON... MAHASKA...MARION AND WARREN. IN SOUTHWEST IOWA...ADAIR AND CASS. IN WEST CENTRAL IOWA...AUDUBON...CARROLL...CRAWFORD... GREENE AND GUTHRIE. * UNTIL NOON CDT TODAY * THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO IMPACT THE AREA THROUGH THE MORNING HOURS TODAY. RAINFALL RATES OF UP TO 3 INCHES PER HOUR WILL BE POSSIBLE WITH GENERALIZED RAINFALL OF 2 TO 5 INCHES WITH LOCALIZED HIGHER AMOUNTS ARE ANTICIPATED. * AREAS RECEIVING OVER 3 INCHES OF RAINFALL MAY EXPERIENCE BOTH URBAN AND RURAL FLASH FLOODING WITH CREEKS...STREAMS...AND SMALL RIVER RISING RAPIDLY. STREET FLOODING WILL ALSO OCCUR AT LOCATIONS PRONE TO FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ PODRAZIK
443 WGUS63 KDMX 221314 FFADMX FLOOD WATCH NATIONAL WEATHER SERVICE DES MOINES IA 814 AM CDT THU JUL 22 2010 ...HEAVY RAINFALL EXPECTED TO CONTINUE THIS MORNING...AND THEN RE- DEVELOP LATE THIS AFTERNOON AND TONIGHT OVER NORTHERN IOWA... .NUMEROUS THUNDERSTORMS WILL PERSIST ACROSS NORTHERN IOWA AS AN UPPER LEVEL DISTURBANCE RIDES ALONG A STATIONARY FRONT EXTENDING OVER NORTHERN IOWA TODAY. LOOK FOR ANOTHER DISTURBANCE TO RIDE ALONG THIS SAME BOUNDARY AGAIN THIS EVENING AND PROVIDE ADDITIONAL ROUNDS OF HEAVY THUNDERSTORMS OVER NORTHERN IOWA. IAZ044>050-057>062-070>075-221415- /O.CAN.KDMX.FF.A.0021.000000T0000Z-100722T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE- DALLAS-POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON-WARREN-MARION- MAHASKA- INCLUDING THE CITIES OF...DENISON...CARROLL...JEFFERSON...BOONE... AMES...MARSHALLTOWN...TOLEDO...AUDUBON...GUTHRIE CENTER...ADEL... DES MOINES...NEWTON...GRINNELL...ATLANTIC...GREENFIELD... WINTERSET...INDIANOLA...KNOXVILLE...OSKALOOSA 814 AM CDT THU JUL 22 2010 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF CENTRAL IOWA...SOUTH CENTRAL IOWA...SOUTHWEST IOWA AND WEST CENTRAL IOWA HAS BEEN CANCELLED. THUNDERSTORMS WILL CONTINUE TO THE NORTH OF THE AREA...HOWEVER THEY WILL REMAIN ISOLATED ALONG AND SOUTH OF U.S. HIGHWAY 30. $$ IAZ004>007-015>017-023>028-033>039-222115- /O.CON.KDMX.FF.A.0021.000000T0000Z-100723T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK- INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY... NORTHWOOD...EMMETSBURG...GARNER...MASON CITY...POCAHONTAS... HUMBOLDT...CLARION...HAMPTON...ALLISON...WAVERLY...SAC CITY... ROCKWELL CITY...FORT DODGE...WEBSTER CITY...ELDORA... GRUNDY CENTER...WATERLOO 814 AM CDT THU JUL 22 2010 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF CENTRAL IOWA...NORTH CENTRAL IOWA...NORTHEAST IOWA...NORTHWEST IOWA AND WEST CENTRAL IOWA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA...GRUNDY...HAMILTON...HARDIN AND WEBSTER. IN NORTH CENTRAL IOWA...BUTLER...CERRO GORDO... FRANKLIN...HANCOCK...HUMBOLDT...KOSSUTH...WINNEBAGO...WORTH AND WRIGHT. IN NORTHEAST IOWA...BLACK HAWK AND BREMER. IN NORTHWEST IOWA...EMMET...PALO ALTO AND POCAHONTAS. IN WEST CENTRAL IOWA...CALHOUN AND SAC. * THROUGH THIS EVENING * NUMEROUS THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO IMPACT THE AREA THROUGH THE MORNING HOURS TODAY. RAINFALL RATES OF UP TO 3 INCHES PER HOUR AT TIMES AND GENERALIZED RAINFALL AMOUNTS OF 3 TO 6 INCHES WITHIN THE WATCH AREA ARE POSSIBLE. * IN ADDITION...ANOTHER ROUND OF THUNDERSTORMS ARE ANTICIPATED TO DEVELOP OVER THE AREA LATE THIS AFTERNOON THROUGH THE EVENING HOURS...WITH HEAVY RAIN POTENTIAL AGAIN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$
080 WGUS63 KDMX 221625 FFADMX FLOOD WATCH NATIONAL WEATHER SERVICE DES MOINES IA 1125 AM CDT THU JUL 22 2010 ...HEAVY RAINFALL EXPECTED TO REDEVELOP VERY LATE THIS AFTERNOON AND TONIGHT OVER NORTHERN IOWA... .SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WILL PERSIST OVER NORTHERN IOWA TODAY. A SECOND UPPER LEVEL DISTURBANCE WILL PUSH ACROSS THE AREA TONIGHT. THUNDERSTORMS WITH HEAVY RAINFALL WILL ONCE AGAIN BE POSSIBLE FROM LATE AFTERNOON THROUGH TONIGHT WITH THE BEST CHANCES OCCURRING FROM MID EVENING ON. IAZ004>007-015>017-023>028-033>039-230030- /O.CON.KDMX.FF.A.0021.000000T0000Z-100723T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK- INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY... NORTHWOOD...EMMETSBURG...GARNER...MASON CITY...POCAHONTAS... HUMBOLDT...CLARION...HAMPTON...ALLISON...WAVERLY...SAC CITY... ROCKWELL CITY...FORT DODGE...WEBSTER CITY...ELDORA... GRUNDY CENTER...WATERLOO 1125 AM CDT THU JUL 22 2010 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF CENTRAL IOWA...NORTH CENTRAL IOWA...NORTHEAST IOWA...NORTHWEST IOWA AND WEST CENTRAL IOWA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA...GRUNDY...HAMILTON...HARDIN AND WEBSTER. IN NORTH CENTRAL IOWA...BUTLER...CERRO GORDO... FRANKLIN...HANCOCK...HUMBOLDT...KOSSUTH...WINNEBAGO...WORTH AND WRIGHT. IN NORTHEAST IOWA...BLACK HAWK AND BREMER. IN NORTHWEST IOWA...EMMET...PALO ALTO AND POCAHONTAS. IN WEST CENTRAL IOWA...CALHOUN AND SAC. * THROUGH THIS EVENING * SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WILL PERSIST ACROSS NORTHERN IOWA TODAY. RAINFALL AMOUNTS ARE NOT EXPECTED TO BE MORE THAN A QUARTER INCH...ON TOP OF THE 3 TO 5 INCHES THAT FELL THIS MORNING. NUMEROUS THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO IMPACT THE AREA LATE THIS AFTERNOON AND ESPECIALLY TONIGHT. RAINFALL RATES OF UP TO 2 INCHES PER HOUR AT TIMES AND GENERALIZED RAINFALL AMOUNTS OF 2 TO 5 INCHES WITHIN THE WATCH AREA ARE POSSIBLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ FAB
376 WGUS63 KDMX 222057 FFADMX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE DES MOINES IA 357 PM CDT THU JUL 22 2010 ...HEAVY RAINFALL EXPECTED TO REDEVELOP VERY LATE THIS AFTERNOON AND TONIGHT OVER NORTHERN IOWA... .A COUPLE OF STALLED BOUNDARIES ACROSS NORTHERN IOWA ALONG WITH A MOIST AND UNSTABLE AIRMASS WILL BE THE FOCUS FOR THUNDERSTORMS FROM LATE THIS AFTERNOON THROGH TONIGHT. HEAVY RAINFALL IS LIKELY WITH SOME OF THE STORMS. IAZ004>007-015>017-023>028-033>039-230500- /O.EXT.KDMX.FF.A.0021.000000T0000Z-100723T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK- INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY... NORTHWOOD...EMMETSBURG...GARNER...MASON CITY...POCAHONTAS... HUMBOLDT...CLARION...HAMPTON...ALLISON...WAVERLY...SAC CITY... ROCKWELL CITY...FORT DODGE...WEBSTER CITY...ELDORA... GRUNDY CENTER...WATERLOO 357 PM CDT THU JUL 22 2010 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH FRIDAY MORNING... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF CENTRAL IOWA...NORTH CENTRAL IOWA...NORTHEAST IOWA...NORTHWEST IOWA AND WEST CENTRAL IOWA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA...GRUNDY...HAMILTON...HARDIN AND WEBSTER. IN NORTH CENTRAL IOWA...BUTLER...CERRO GORDO... FRANKLIN...HANCOCK...HUMBOLDT...KOSSUTH...WINNEBAGO...WORTH AND WRIGHT. IN NORTHEAST IOWA...BLACK HAWK AND BREMER. IN NORTHWEST IOWA...EMMET...PALO ALTO AND POCAHONTAS. IN WEST CENTRAL IOWA...CALHOUN AND SAC. * THROUGH FRIDAY MORNING * NUMEROUS THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO IMPACT THE AREA LATE THIS AFTERNOON AND ESPECIALLY TONIGHT. WIDESPREAD ONE TO TWO INCH RAINFALL AMOUNTS WILL BE LIKELY WITH LOCALLY HIGHER AMOUNTS AND THIS WILL FALL OVER THE SAME AREAS THAT RECEIVED THREE TO FIVE INCHES LAST NIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ FAB
268 WGUS63 KDMX 230054 FFADMX FLOOD WATCH NATIONAL WEATHER SERVICE DES MOINES IA 754 PM CDT THU JUL 22 2010 ...HEAVY RAINFALL IS EXPECTED IN PORTIONS OF CENTRAL IOWA TONIGHT... .A STALLED BOUNDARY IN NORTHERN IOWA WILL PROVIDE THE FOCUS OF THUNDERSTORMS DEVELOPMENT TONIGHT. HEAVY RAINFALL WILL BE POSSIBLE GIVEN THE AMPLE MOISTURE FEEDING INTO THE SYSTEM. IAZ004>007-015>017-230200- /O.CAN.KDMX.FF.A.0021.000000T0000Z-100723T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY... NORTHWOOD...EMMETSBURG...GARNER...MASON CITY 754 PM CDT THU JUL 22 2010 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF NORTH CENTRAL IOWA AND NORTHWEST IOWA HAS BEEN CANCELLED. THE THREAT OF VERY HEAVY HEAVY RAINFALL APPEARS TO BE MORE LIKELY ALONG THE HIGHWAY 20 CORRIDOR OVERNIGHT. HOWEVER...SOME ADDITIONAL RAINFALL IS STILL POSSIBLE OVERNIGHT AS ADDITIONAL THUNDERSTORMS DEVELOP LATER. $$ IAZ023>028-033>039-231030- /O.CON.KDMX.FF.A.0021.000000T0000Z-100723T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK- INCLUDING THE CITIES OF...POCAHONTAS...HUMBOLDT...CLARION... HAMPTON...ALLISON...WAVERLY...SAC CITY...ROCKWELL CITY... FORT DODGE...WEBSTER CITY...ELDORA...GRUNDY CENTER...WATERLOO 754 PM CDT THU JUL 22 2010 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 7 AM CDT FRIDAY... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF CENTRAL IOWA...NORTH CENTRAL IOWA...NORTHEAST IOWA...NORTHWEST IOWA AND WEST CENTRAL IOWA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA...GRUNDY...HAMILTON...HARDIN AND WEBSTER. IN NORTH CENTRAL IOWA...BUTLER...FRANKLIN... HUMBOLDT AND WRIGHT. IN NORTHEAST IOWA...BLACK HAWK AND BREMER. IN NORTHWEST IOWA...POCAHONTAS. IN WEST CENTRAL IOWA...CALHOUN AND SAC. * UNTIL 7 AM CDT FRIDAY * THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO IMPACT THE AREA TONIGHT. WIDESPREAD ONE TO THREE INCH RAINFALL AMOUNTS WILL BE LIKELY WITH LOCALLY HIGHER AMOUNTS. THIS WILL FALL OVER THE SAME AREAS THAT RECEIVED THREE TO FIVE INCHES LAST NIGHT AND MAY LEAD TO FLASH FLOODING. RENEWED RIVER FLOODING WILL ALSO BE POSSIBLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ COGIL
311 WGUS63 KDMX 230906 FFADMX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE DES MOINES IA 406 AM CDT FRI JUL 23 2010 ...HEAVY RAINFALL IS EXPECTED OVER PORTIONS OF NORTH-CENTRAL IOWA THROUGH THE REMAINDER OF THE MORNING AND AGAIN TONIGHT... .A STATIONAY FRONT DRAPED ACROSS NORTHERN IOWA WILL REMAIN THE FOCUS OF THUNDERSTORM DEVELOPMENT THROUGH THE MORNING HOURS TODAY. A STRONG UPPER LEVEL LOW PRESSURE SYSTEM WILL DRAG A COLD FRONT ACROSS THE STATE TONIGHT AND PROVIDE ANOTHER ROUND OF THUNDERSTORMS. HEAVY RAINFALL WILL BE POSSIBLE DURING BOTH TIME FRAMES AS AMPLE MOISTURE IS EXPECTED TO CONTINUE TO FEED INTO THE SYSTEM. IAZ004>007-015>017-231715- /O.NEW.KDMX.FF.A.0022.100724T0000Z-100724T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY... NORTHWOOD...EMMETSBURG...GARNER...MASON CITY 406 AM CDT FRI JUL 23 2010 ...FLASH FLOOD WATCH IN EFFECT FROM THIS EVENING THROUGH SATURDAY MORNING... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NORTH CENTRAL IOWA AND NORTHWEST IOWA...INCLUDING THE FOLLOWING AREAS...IN NORTH CENTRAL IOWA...CERRO GORDO...HANCOCK...KOSSUTH...WINNEBAGO AND WORTH. IN NORTHWEST IOWA...EMMET AND PALO ALTO. * FROM THIS EVENING THROUGH SATURDAY MORNING. * WIDESPREAD THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS EVENING AND INTO THE OVERNIGHT HOURS AS A COLD FRONT PUSHES ACROSS THE STATE. HEAVY RAINFALL IS LIKELY TO ACCOMPANY THESE STORMS WHERE RAINFALL RATES OF TWO TO THREE INCHES PER HOUR ARE POSSIBLE AT TIMES. TOTAL RAINFALL AMOUNTS BY SATURDAY MORNING WILL RANGE FROM 2 TO 3 INCHES WITH SOME LOCALLY HIGHER AMOUNTS POSSIBLE. WITH THIS EXPECTED HEAVY RAIN ON TOP OF AN ALREADY VERY SATURATED GROUND...AREAS OF FLASH FLOODING ARE ANTICIPATED TO POSE A PROBLEM. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ IAZ023>028-033>039-231715- /O.EXT.KDMX.FF.A.0021.000000T0000Z-100724T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK- INCLUDING THE CITIES OF...POCAHONTAS...HUMBOLDT...CLARION... HAMPTON...ALLISON...WAVERLY...SAC CITY...ROCKWELL CITY... FORT DODGE...WEBSTER CITY...ELDORA...GRUNDY CENTER...WATERLOO 406 AM CDT FRI JUL 23 2010 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH SATURDAY MORNING... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF CENTRAL IOWA...NORTH CENTRAL IOWA...NORTHEAST IOWA...NORTHWEST IOWA AND WEST CENTRAL IOWA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA...GRUNDY...HAMILTON...HARDIN AND WEBSTER. IN NORTH CENTRAL IOWA...BUTLER...FRANKLIN... HUMBOLDT AND WRIGHT. IN NORTHEAST IOWA...BLACK HAWK AND BREMER. IN NORTHWEST IOWA...POCAHONTAS. IN WEST CENTRAL IOWA...CALHOUN AND SAC. * THROUGH SATURDAY MORNING. * SCATTERED THUNDERSTORMS ARE EXPECTED TO CONTINUE ACROSS THE AREA THROUGH THE REMAINDER OF THE MORNING HOURS TODAY. RAINFALL RATES OF ONE TO NEAR FOUR INCHES PER HOUR ARE POSSIBLE AT TIMES AND RAINFALL ACCUMULATIONS OF 1 TO 2 INCHES MAY OCCUR IN SOME LOCALIZED AREAS BY MID-MORNING. THE GROUND IS ALREADY VERY SATURATED FROM RAINS PREVIOUSLY THIS WEEK...SO FLASH FLOOD IS LIKELY TO POSE A PROBLEM IN SOME AREAS DURING THE MORNING COMMUTE. * ANOTHER ROUND OF STRONG THUNDERSTORMS IS FORECAST TO DEVELOP THIS EVENING INTO THE OVERNIGHT HOURS. RAINFALL RATES WILL AGAIN RANGE FROM ONE TO FOUR INCHES PER HOUR AT TIMES AND ADDITIONAL RAINFALL AMOUNTS MAY EXCEED 3 INCHES IN SOME LOCALIZED AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ PODRAZIK
442 WGUS63 KDMX 231615 FFADMX FLOOD WATCH NATIONAL WEATHER SERVICE DES MOINES IA 1115 AM CDT FRI JUL 23 2010 ...HEAVY RAINFALL IS EXPECTED OVER PORTIONS OF NORTH-CENTRAL IOWA LATE THIS AFTERNOON THROUGH TONIGHT... .A STATIONAY FRONT DRAPED ACROSS NORTHERN IOWA WILL REMAIN THE FOCUS OF THUNDERSTORM DEVELOPMENT LATE THIS AFTERNOON INTO THE EVENING. A STRONG UPPER LEVEL LOW PRESSURE SYSTEM WILL DRAG A COLD FRONT ACROSS THE STATE TONIGHT AND PROVIDE ANOTHER ROUND OF THUNDERSTORMS. HEAVY RAINFALL WILL BE POSSIBLE DURING BOTH TIME FRAMES AS AMPLE MOISTURE IS EXPECTED TO CONTINUE TO FEED INTO THE SYSTEM. IAZ023>028-033>039-240015- /O.CON.KDMX.FF.A.0021.000000T0000Z-100724T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK- INCLUDING THE CITIES OF...POCAHONTAS...HUMBOLDT...CLARION... HAMPTON...ALLISON...WAVERLY...SAC CITY...ROCKWELL CITY... FORT DODGE...WEBSTER CITY...ELDORA...GRUNDY CENTER...WATERLOO 1115 AM CDT FRI JUL 23 2010 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY MORNING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF CENTRAL IOWA...NORTH CENTRAL IOWA...NORTHEAST IOWA...NORTHWEST IOWA AND WEST CENTRAL IOWA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA...GRUNDY...HAMILTON...HARDIN AND WEBSTER. IN NORTH CENTRAL IOWA...BUTLER...FRANKLIN... HUMBOLDT AND WRIGHT. IN NORTHEAST IOWA...BLACK HAWK AND BREMER. IN NORTHWEST IOWA...POCAHONTAS. IN WEST CENTRAL IOWA... CALHOUN AND SAC. * THROUGH SATURDAY MORNING * SCATTERED THUNDERSTORMS ARE EXPECTED TO REDEVELOP ACROSS THE AREA LATE THIS AFTERNOON. RAINFALL RATES OF ONE TO TWO INCHES PER HOUR ARE POSSIBLE AT TIMES THROUGH EARLY EVENING. STRONGER STORMS ARE EXPECTED TONIGHT WITH RAINFALL RATES OF 2 TO 4 INCHES PER HOUR. RAINFALL AMOUNTS TONIGHT MAY AGAIN RANGE FROM 2 TO 6 INCHES WITH LOCALLY HIGHER AMOUNTS. THE GROUND IS ALREADY VERY SATURATED FROM RAINS PREVIOUSLY THIS WEEK...SO FLASH FLOOD IS LIKELY TO POSE A PROBLEM IN SOME AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ IAZ004>007-015>017-240015- /O.CON.KDMX.FF.A.0022.100724T0000Z-100724T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY... NORTHWOOD...EMMETSBURG...GARNER...MASON CITY 1115 AM CDT FRI JUL 23 2010 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH SATURDAY MORNING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTH CENTRAL IOWA AND NORTHWEST IOWA...INCLUDING THE FOLLOWING AREAS...IN NORTH CENTRAL IOWA...CERRO GORDO... HANCOCK...KOSSUTH...WINNEBAGO AND WORTH. IN NORTHWEST IOWA... EMMET AND PALO ALTO. * FROM 7 PM CDT THIS EVENING THROUGH SATURDAY MORNING * WIDESPREAD THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS EVENING AND PERSIST THROUGH MOST OF THE OVERNIGHT HOURS AS A COLD FRONT PUSHES ACROSS THE STATE. HEAVY RAINFALL IS LIKELY TO ACCOMPANY THESE STORMS WHERE RAINFALL RATES OF TWO TO THREE INCHES PER HOUR ARE POSSIBLE AT TIMES. TOTAL RAINFALL AMOUNTS BY SATURDAY MORNING WILL RANGE FROM 2 TO 3 INCHES WITH SOME LOCALLY HIGHER AMOUNTS POSSIBLE. WITH THIS EXPECTED HEAVY RAIN ON TOP OF AN ALREADY VERY SATURATED GROUND...AREAS OF FLASH FLOODING ARE ANTICIPATED TO POSE A PROBLEM. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ FAB
378 WGUS63 KDMX 231959 FFADMX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE DES MOINES IA 259 PM CDT FRI JUL 23 2010 ...HEAVY RAINFALL IS EXPECTED OVER PORTIONS OF NORTHERN AND CENTRAL TONIGHT... .A COMPLEX WEATHER PATTERN HAS SET UP OVER CENTRAL IOWA WITH SEVERAL BOUNDARIES ACROSS THE STATE. ONE BOUNDARY ALONG THE INTERSTATE 80 CORRIDOR HAD THUNDERSTORMS DEVELOP AS AN UPPER LEVEL DISTURBANCE MOVED EAST. ANOTHER STRONGER UPPER LEVEL SYSTEM OVER THE HIGH PLAINS WILL MOVE ACROSS MINNESOTA AND NORTHERN IOWA DRAGGING A COLD FRONT ACROSS THE STATE AND BRING WIDESPREAD THUNDERSTORMS WITH HEAVY RAINFALL. IAZ023>028-033>039-240400- /O.CAN.KDMX.FF.A.0021.000000T0000Z-100724T1200Z/ /O.EXA.KDMX.FF.A.0022.100724T0000Z-100724T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK- INCLUDING THE CITIES OF...POCAHONTAS...HUMBOLDT...CLARION... HAMPTON...ALLISON...WAVERLY...SAC CITY...ROCKWELL CITY... FORT DODGE...WEBSTER CITY...ELDORA...GRUNDY CENTER...WATERLOO 259 PM CDT FRI JUL 23 2010 ...FLASH FLOOD WATCH IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH SATURDAY MORNING... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS EXPANDED THE * FLASH FLOOD WATCH TO INCLUDE PORTIONS OF CENTRAL IOWA...NORTH CENTRAL IOWA...NORTHEAST IOWA...NORTHWEST IOWA AND WEST CENTRAL IOWA...INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA...GRUNDY...HAMILTON...HARDIN AND WEBSTER. IN NORTH CENTRAL IOWA...BUTLER...FRANKLIN...HUMBOLDT AND WRIGHT. IN NORTHEAST IOWA...BLACK HAWK AND BREMER. IN NORTHWEST IOWA... POCAHONTAS. IN WEST CENTRAL IOWA...CALHOUN AND SAC. * FROM 7 PM CDT THIS EVENING THROUGH SATURDAY MORNING * WIDESPREAD THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS EVENING AND PERSIST THROUGH MOST OF THE OVERNIGHT HOURS AS A COLD FRONT PUSHES ACROSS THE STATE. HEAVY RAINFALL IS LIKELY TO ACCOMPANY THESE STORMS WHERE RAINFALL RATES OF TWO TO THREE INCHES PER HOUR ARE POSSIBLE AT TIMES. TOTAL RAINFALL AMOUNTS BY SATURDAY MORNING WILL RANGE FROM 2 TO 3 INCHES WITH SOME LOCALLY HIGHER AMOUNTS POSSIBLE. THE EXPECTED HEAVY RAIN ON TOP OF AN ALREADY VERY SATURATED GROUND WILL LIKELY PRODUCE AREAS OF FLASH FLOODING AND ARE ANTICIPATED TO POSE ADDITIONAL PROBLEMS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ IAZ044>050-058>062-072>075-084>086-096-097-240400- /O.EXA.KDMX.FF.A.0022.100724T0000Z-100724T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL-TAMA-GUTHRIE-DALLAS- POLK-JASPER-POWESHIEK-MADISON-WARREN-MARION-MAHASKA-LUCAS-MONROE- WAPELLO-APPANOOSE-DAVIS- INCLUDING THE CITIES OF...DENISON...CARROLL...JEFFERSON...BOONE... AMES...MARSHALLTOWN...TOLEDO...GUTHRIE CENTER...ADEL... DES MOINES...NEWTON...GRINNELL...WINTERSET...INDIANOLA... KNOXVILLE...OSKALOOSA...CHARITON...ALBIA...OTTUMWA... CENTERVILLE...BLOOMFIELD 259 PM CDT FRI JUL 23 2010 ...FLASH FLOOD WATCH IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH SATURDAY MORNING... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS EXPANDED THE * FLASH FLOOD WATCH TO INCLUDE PORTIONS OF CENTRAL IOWA...SOUTH CENTRAL IOWA...SOUTHEAST IOWA AND WEST CENTRAL IOWA... INCLUDING THE FOLLOWING AREAS...IN CENTRAL IOWA...BOONE... DALLAS...JASPER...MARSHALL...POLK...POWESHIEK...STORY AND TAMA. IN SOUTH CENTRAL IOWA...APPANOOSE...LUCAS...MADISON... MAHASKA...MARION...MONROE AND WARREN. IN SOUTHEAST IOWA... DAVIS AND WAPELLO. IN WEST CENTRAL IOWA...CARROLL...CRAWFORD... GREENE AND GUTHRIE. * FROM 7 PM CDT THIS EVENING THROUGH SATURDAY MORNING * SCATTERED THUNDERSTORMS ARE POSSIBLE ALONG AND SOUTH OF THE INTERSTATE 80 CORRIDOR THROUGH EARLY EVENING. MODERATE RAINFALL IS POSSIBLE WITH THESE STORMS. WIDESPREAD THUNDERSTORMS ARE EXPECTED TO DEVELOP LATER THIS EVENING AND PERSIST OVERNIGHT AS A COLD FRONT PUSHES ACROSS THE STATE. HEAVY RAINFALL IS LIKELY TO ACCOMPANY THESE STORMS WHERE RAINFALL RATES OF TWO TO THREE INCHES PER HOUR ARE POSSIBLE AT TIMES. TOTAL RAINFALL AMOUNTS BY SATURDAY MORNING WILL RANGE FROM 2 TO 3 INCHES WITH SOME LOCALLY HIGHER AMOUNTS POSSIBLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ IAZ004>007-015>017-240400- /O.CON.KDMX.FF.A.0022.100724T0000Z-100724T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY... NORTHWOOD...EMMETSBURG...GARNER...MASON CITY 259 PM CDT FRI JUL 23 2010 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH SATURDAY MORNING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTH CENTRAL IOWA AND NORTHWEST IOWA...INCLUDING THE FOLLOWING AREAS...IN NORTH CENTRAL IOWA...CERRO GORDO... HANCOCK...KOSSUTH...WINNEBAGO AND WORTH. IN NORTHWEST IOWA... EMMET AND PALO ALTO. * FROM 7 PM CDT THIS EVENING THROUGH SATURDAY MORNING * WIDESPREAD THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS EVENING AND PERSIST THROUGH MOST OF THE OVERNIGHT HOURS AS A COLD FRONT PUSHES ACROSS THE STATE. HEAVY RAINFALL IS LIKELY TO ACCOMPANY THESE STORMS WHERE RAINFALL RATES OF TWO TO THREE INCHES PER HOUR ARE POSSIBLE AT TIMES. TOTAL RAINFALL AMOUNTS BY SATURDAY MORNING WILL RANGE FROM 2 TO 3 INCHES WITH SOME LOCALLY HIGHER AMOUNTS POSSIBLE. THE EXPECTED HEAVY RAIN ON TOP OF AN ALREADY VERY SATURATED GROUND WILL LIKELY PRODUCE AREAS OF FLASH FLOODING AND ARE ANTICIPATED TO POSE ADDITIONAL PROBLEMS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ FAB
What forecasters said that day
The local office's own words before this flash flood watch 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 watch went out at Jul 21, 3:35 PM CDT, 16 minutes earlier.
Area forecast discussion, Jul 21, 3:35 PM CDT, 16 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DES MOINES IA 335 PM CDT WED JUL 21 2010 .SHORT TERM /TONIGHT/... COMPLICATED OVERNIGHT FORECAST WITH POTENTIAL FOR HEAVY RAINFALL. CURRENT STATIONARY FRONT WELL SOUTH OF REGION...BUT SHOULD LIFT TNT AS WESTERN SHORT WAVE ARRIVES LATE EVENING. MODELS DIFFER IN FORCING WITH GFS FARTHER SOUTH...NAM A BIT FARTHER NORTH WITH LIFT AND ASSOCIATED HEAVY RAIN AXIS. ANOTHER WEAK TROUGH HAS DEVELOPED OVER SOUTHERN SOUTH DAKOTA IN ASSOCIATION WITH H700 UPPER LEVEL FRONT. SOME CONVECTION DEVELOPING ALONG THIS FEATURE LATE THIS AFTERNOON. ANOTHER AREA OVER CENTRAL NE SHOWS INITIATION AS WELL. WESTERN SECTIONS NEARLY UNCAPPED NOW MLCAPE OF 1000 TO 1500 J/KG. LOOKING FOR TWO AREAS TO DEVELOP THIS EVENING...EASTERN NE AND SOUTH DAKOTA. AS LOW APPROACHES EXPECT THE AREAS TO BUILD ESE WITH TIME DUE TO INCREASING H850 LLJ...BUT CORFIDI VECTORS BUILDING BACK TOWARD SOUTH INTO GREATER MOISTURE TRANSPORT AND AND AXIS OF HIGHER PWATS. H850 LLJ EXPECTED TO INCREASE TO 40KTS OR HIGHER JUST TO THE WEST TONIGHT. MOISTURE TRANSPORT WILL BE SIGNIFICANT WITH CONVERGENCE INCREASING OVER THE AREA LATER THIS EVENING. THUS...WITH 1 HR FFG GUIDANCE RATHER LOW OVER THE SOUTH/CENTRAL FROM PREVIOUS RAINFALL...WILL ISSUE A FLASH FLOOD WATCH FOR CENTRAL SECTIONS OF THE FORECAST AREA. SOUTH LEFT OUT FOR NOW...BUT MAY BE ADDED LATER IF THE STORMS BACK BUILD OR SHOW SIGNS OF DEVELOPING FARTHER SOUTH. FAR NORTH MAY RECEIVE LOCALLY HEAVY RAINFALL BUT THOSE AREAS CAN STAND 3 OR MORE INCHES IN SOME CASES AND WATCH NOT CURRENTLY WARRANTED THERE. RAINFALL TOTALS WILL EXCEED 3 INCHES IN HEAVIER STORMS WITH LOCALLY HIGHER AMOUNTS POSSIBLE TO 5 INCHES. SOME ADJUSTMENTS IN WATCH OUTLINE MAY BE NEEDED LATER THIS EVENING. TEMPS TONIGHT WILL ONLY DROP INTO THE MID TO UPPER 60S NORTH AND LOWER 70S SOUTH. .LONG TERM /THURSDAY THROUGH WEDNESDAY/... COMPLEXITIES CONTINUE INTO THE LONGER TERM AS MUCH OF THE FIRST FEW PERIODS DEPEND ON WHERE THE CONVECTION ULTIMATELY SETS UP. GIVEN RECENT HISTORY...WOULD THINK CONVECTION WILL BE FARTHER SOUTH THAN MOST DETERMINISTIC MODELS SHOW AND WILL LEAVE THE OUTFLOW BOUNDARY AND FRONTAL BOUNDARY SOUTH OF THE CWA. SHOULD SEE SOME NWD MVMT OF THE BNDRY DURG THE DAY...BUT FEEL DEBRIS CLOUDS WILL LIMIT INSOLATION AND HAVE THEREFORE GONE BLO MOS TEMPS. TSRA CHCS WILL DEC IN THE AFTN AND BE LMTD TO THE NERN ZNS IN THE AFTN. CDFNT WILL MOVE INTO THE STATE FRI GIVING CONT CHCS OF PCPN AND AGAIN HAVE GONE CONSERVATIVE ON TEMPS DUE TO POTENTIAL CLOUDINESS AND WET GROUND. CDFNT WON'T MAKE A CLEAN BREAK OF IT FRI YES AS SIG S/WV DROPPING SEWD OUT OF CANADA WILL HOLD FRONT UP UNTIL FRI NGT AND ERY SAT. ONCE THIS S/WV PASSES...PTRN WILL CHNG FOR AT LEAST A FEW DAYS WITH OVERALL DRIER CONDITIONS ON TAP SUN INTO THE FIRST OF NEXT WEEK. WENT WITH LOW POPS FOR THE TUE-WED TIMEFRAME...HOWEVER ATTM IT DOES NOT LOOK LIKE PTRN IS GOING BACK TO THE EXCESSIVE/REPEAT HEAVY CONVECTION OF THE PAST FEW WEEKS. && .AVIATION...21/18Z SOME UNCERTAINTY REMAINS IN FCST OVERNIGHT TNT WITH REGARD TO AREA OF STRONGER STORMS AND LOWER CIGS. MODELS CONTINUE TO POINT TO WEST/NORTH AREAS FOR HEAVIER RAINS...BUT ALL DEPENDS ON THE NORTHWARD MIGRATION OF WARM FRONT WHICH CONTINUES TO REMAIN SOUTH OF OUR AREA ATTM. MAIN SHORT WAVE TO ARRIVE BY EARLY TNT AND SHOULD HELP INTENSIFY THE H850 LL FLOW AND MOISTURE TRANSPORT. WILL SHADE OR TREND CIGS/VSBYS DOWN AFT 05Z THROUGH 11Z AS EXPECTED MCS WILL EITHER MOVE ESE OR EAST AS THE WARMER AIR ADVANCES NORTH OVERNIGHT. IN EITHER CASE...PERIOD OF LOWER VSBYS/CIGS EXPECTED FOR ALL SITES WITH THE ARRIVAL LATEST AT KOTM AND EARLIEST AT KFOD/KMCW/KDSM. SYSTEM SHOULD BE MOVING EAST OF REGION BY MID MORNING 22/15Z TOMORROW WITH SOME MVFR CLOUDS REMAINING PRIOR TO THAT. REFINEMENTS LIKELY IN NEXT PACKAGE...ONCE CONVECTION BEGINS TO DEVELOP. MODELS NOT MUCH HELP TODAY...THOUGH GENERAL CONSENSUS IS FOR A MORE NORTHERLY TRACK OF HEAVIER STORMS OVERNIGHT. /REV && .DMX WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH FROM 7 PM CDT THIS EVENING THROUGH THURSDAY MORNING FOR ADAIR-AUDUBON-BLACK HAWK-BOONE-CALHOUN- CARROLL- CASS-CRAWFORD-DALLAS-GREENE-GRUNDY-GUTHRIE-HAMILTON-HARDIN-JASPER- MADISON-MAHASKA-M ARION-MARSHALL-POLK-POWESHIEK-SAC-STORY-TAMA- WARREN-WEBSTER. && SHORT TERM...REV AVIATION...REV LONG TERM...MS JUL 10
Hazardous weather outlook, Jul 21, 4:16 AM CDT, 11 hours 35 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 416 AM CDT WED JUL 21 2010 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086- 092>097-220930- EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE- BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE-DALLAS-POLK-JASPER- POWESHIEK-CASS-ADAIR-MADISON-WARREN-MARION-MAHASKA-ADAMS-UNION- CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR-RINGGOLD-DECATUR-WAYNE-APPANOOSE- DAVIS- 416 AM CDT WED JUL 21 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT WIDESPREAD THUNDERSTORMS ARE EXPECTED TONIGHT ACROSS MUCH OF THE AREA. SEVERE STORMS ARE POSSIBLE WHERE LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREAT THIS EVENING. IN ADDITION...VERY HEAVY RAINFALL IS ANTICIPATED...ESPECIALLY ACROSS CENTRAL TO NORTHERN IOWA. AREAS OF FLOODING AND FLASH FLOODING ARE POSSIBLE OVERNIGHT TONIGHT. RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR PORTIONS OF CENTRAL IOWA. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY LINGERING THUNDERSTORMS ARE EXPECTED THURSDAY MORNING WHERE HEAVY RAIN WILL REMAIN A THREAT ACROSS NORTHEAST IOWA. ANOTHER ROUND OF STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE LATE THURSDAY AFTERNOON INTO THURSDAY NIGHT...AND AGAIN FRIDAY EVENING INTO SATURDAY MORNING. THE MAIN THREAT LOOKS TO BE LARGE HAIL AND DAMAGING WINDS BUT UNCERTAINTY REMAINS WITH TIMING AND PLACEMENT WITH THESE SYSTEMS LATER IN THE WEEK AND WILL BE BETTER ASSESSED CLOSER TO EACH EVENT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAYBE NEEDED THIS EVENING INTO THE OVERNIGHT HOURS...WITH ADDITIONAL ACTIVATION PERIODS POSSIBLE THURSDAY AND FRIDAY. REPORTS OF HEAVY RAIN AND FLOODING ARE ALWAYS ENCOURAGED AND APPRECIATED. PODRAZIK
Nearby
Flash Flood Watches in Iowa, 2010Every flash flood watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.