Alert archive / Iowa / Flood Watches in 2009
Flood Watch 2, NWS Des Moines, IA
NWS Des Moines, IA issued this flood watch at Dec 23, 2009, 3:58 PM CST for 17 counties in Iowa. It took effect at Dec 24, 2009, 6:00 AM CST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 23, 2009, 3:58 PM CST (21:58 UTC)
- In effect from
- Dec 24, 2009, 6:00 AM CST
- Expired
- Dec 24, 2009, 4:16 AM CST
- In force
- Issued by
- NWS Des Moines, IA
- Flood severity
- None
Counties Appanoose County, IA, Black Hawk County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Jasper County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Polk County, IA, Poweshiek County, IA, Tama County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA
The radar
The Des Moines radar (KDMX), 74 km from the middle of the area, began a volume at 21:57 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
Topeka, KS (KTOP), launched 12:00Z, 10.0 hours before the alert went out and 343 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 420 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 267 m²/s²
- 0-3 km storm-relative helicity
- 294 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
What forecasters said that day
The local office's own words before this 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 flood watch went out at Dec 23, 3:58 PM CST, 0 minutes earlier.
Area forecast discussion, Dec 23, 3:58 PM CST, 0 minutes before
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</html>Hazardous weather outlook, Dec 23, 5:22 AM CST, 10 hours 36 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 522 AM CST WED DEC 23 2009 IAZ004>007-015>017-023>028-033>036-044>046-241130- EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-CRAWFORD-CARROLL-GREENE- 522 AM CST WED DEC 23 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT A WINTER STORM WARNING IS IN EFFECT FOR THE AREA FROM THIS AFTERNOON THROUGH FRIDAY NIGHT. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A WINTER STORM WARNING IS IN EFFECT FOR THE AREA FROM THIS AFTERNOON THROUGH FRIDAY NIGHT. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. SIGNIFICANT SNOWFALL ACCUMULATIONS ARE ANTICIPATED WITH THIS STORM...ALONG WITH STRONG NORTHWEST WINDS REDUCING VISIBILITY AND POTENTIALLY CAUSING NEAR BLIZZARD CONDITIONS AT TIMES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED...BUT ANY SNOWFALL AND ICE ACCUMULATION REPORTS ARE APPRECIATED AND ENCOURAGED. AN EMERGENCY MANAGER CONFERENCE CALL IS SCHEDULED AT 11AM CST WEDNESDAY MORNING. IAZ037>039-047>050-057>060-070>072-241130- HARDIN-GRUNDY-BLACK HAWK-BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE- DALLAS-POLK-CASS-ADAIR-MADISON- 522 AM CST WED DEC 23 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT A WINTER WEATHER ADVISORY IS IN EFFECT FOR THE AREA THROUGH TONIGHT. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. A MIX OF SLEET...FREEZING...AND POSSIBLY SNOW IS EXPECTED TO DEVELOP OVER THE AREA TODAY AND TONIGHT...LEADING TO SOME ICE AND SNOW ACCUMULATIONS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A WINTER STORM WATCH IS IN EFFECT FOR THE AREA FROM THURSDAY AFTERNOON THROUGH FRIDAY NIGHT. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. A VERY STRONG LOW PRESSURE SYSTEM IS FORECAST TO SLOWLY APPROACH THE STATE AND BRING A WINTRY MIX OF SNOW...SLEET...AND FREEZING RAIN TO THE AREA BY THURSDAY AFTERNOON. THURSDAY NIGHT INTO FRIDAY MORNING...LOOK FOR THE PRECIPITATION TO CHANGE OVER TO ALL SNOW. MODERATE SNOW AND ICE ACCUMULATIONS ARE POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED...BUT ANY SNOWFALL AND ICE ACCUMULATION REPORTS ARE APPRECIATED AND ENCOURAGED. AN EMERGENCY MANAGER CONFERENCE CALL IS SCHEDULED AT 11AM CST WEDNESDAY MORNING. IAZ061-073-081>083-092>094-241130- JASPER-WARREN-ADAMS-UNION-CLARKE-TAYLOR-RINGGOLD-DECATUR- 522 AM CST WED DEC 23 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT AREAS OF FREEZING DRIZZLE WITH INTENSIFY THROUGHOUT THE DAY TODAY INTO THE POTENTIAL FOR FREEZING RAIN. HOWEVER...WARMER AIR WILL ALSO MOVE INTO SOUTHERN IOWA...LEADING TO THE POTENTIAL FOR MUCH OF THE AREA TO RECEIVE ALL RAIN THROUGHOUT MUCH OF THE DAY TODAY AND INTO THIS EVENING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A WINTER STORM WATCH IS IN EFFECT FOR THE AREA FROM THURSDAY AFTERNOON THROUGH FRIDAY NIGHT. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. A VERY STRONG LOW PRESSURE SYSTEM IS FORECAST TO SLOWLY APPROACH THE STATE AND BRING A WINTRY MIX OF SNOW...SLEET...AND FREEZING RAIN TO THE AREA BY THURSDAY AFTERNOON. THURSDAY NIGHT INTO FRIDAY MORNING...LOOK FOR THE PRECIPITATION TO CHANGE OVER TO ALL SNOW. MODERATE SNOW AND ICE ACCUMULATIONS ARE POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED...BUT ANY SNOWFALL AND ICE ACCUMULATION REPORTS ARE APPRECIATED AND ENCOURAGED. AN EMERGENCY MANAGER CONFERENCE CALL IS SCHEDULED AT 11AM CST WEDNESDAY MORNING. IAZ062-074-075-084>086-095>097-241130- POWESHIEK-MARION-MAHASKA-LUCAS-MONROE-WAPELLO-WAYNE-APPANOOSE-DAVIS- 522 AM CST WED DEC 23 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT AREAS OF DRIZZLE AND POSSIBLY FREEZING DRIZZLE ARE EXPECTED THROUGHOUT THE MORNING HOURS...BEFORE SWITCHING TO ALL RAIN BY AROUND MIDDAY. A CHANCE OF AN ISOLATED THUNDERSTORM IS POSSIBLE BY THIS AFTERNOON AND EVENING. HOWEVER...NO SEVERE WEATHER IS EXPECTED. RAINFALL AMOUNTS OF A HALF INCH TO AROUND AN INCH ARE POSSIBLE THROUGH TONIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A POTENT WINTER STORM IS EXPECTED TO CONTINUE TO AFFECT THE STATE THURSDAY INTO SATURDAY. HOWEVER...WARMER AIR WILL PUSH INTO THE AREA AHEAD OF THE SURFACE LOW PRESSURE FOR A LONG DURATION. THIS IS EXPECTED TO CAUSE FOR RAIN ON THURSDAY AND THURSDAY NIGHT...BEFORE SWITCHING OVER TO A WINTRY MIX DURING THE OVERNIGHT HOURS INTO FRIDAY. TOTAL RAINFALL AMOUNTS UP 2 INCHES ARE POSSIBLE BY THURSDAY NIGHT. IN ADDITION...WITH THE CURRENT SNOW PACK CONTAINING AROUND 1 TO 2 INCHES OF LIQUID EQUIVALENT...AREAS OF FLOODING ARE POSSIBLE...ESPECIALLY AREAS PRONE TO ICE JAMS AND RAPID RISES IN RIVER AND CREEK LEVELS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED...BUT ANY SNOWFALL AND ICE ACCUMULATION REPORTS ARE APPRECIATED AND ENCOURAGED. AN EMERGENCY MANAGER CONFERENCE CALL IS SCHEDULED AT 11AM CST WEDNESDAY MORNING. PODRAZIK
In the hours before
Local storm report, Dec 23, 12:52 PM CST, 3 hours 6 minutes before
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</html>Local storm report, Dec 23, 1:22 PM CST, 2 hours 36 minutes before
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</html>Local storm report, Dec 23, 2:06 PM CST, 1 hour 52 minutes before
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</html>Local storm report, Dec 23, 2:55 PM CST, 1 hour 3 minutes before
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</html>Local storm report, Dec 23, 2:56 PM CST, 1 hour 2 minutes before
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</html>Local storm report, Dec 23, 2:59 PM CST, 59 minutes before
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</html>The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 23, 5:07 AM CST | Winter Storm Warning | DMX | Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 36 more | 71 hr |
| Dec 23, 5:07 AM CST | Winter Weather Advisory | DMX | Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 37 more | 23 hr |
| Dec 23, 1:26 PM CST | River Flood Warning | DMX | Lucas, Wayne | 30 hr |
Nearby
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.