Alert archive / Iowa / Areal Flood Advisories in 2009
Areal Flood Advisory 21, NWS Des Moines, IA
NWS Des Moines, IA issued this areal flood advisory at Jul 4, 2009, 4:02 AM CDT for 5 counties in Iowa. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Jul 4, 2009, 4:02 AM CDT (09:02 UTC)
- Expired
- Jul 4, 2009, 10:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
Counties Adair County, IA, Adams County, IA, Clarke County, IA, Madison County, IA, Union County, IA
The radar
The Des Moines radar (KDMX), 78 km from the middle of the area, began a volume at 09:04 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 00:00Z, 9.0 hours before the alert went out and 267 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
- 969 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 933 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 252 m²/s²
- 0-3 km storm-relative helicity
- 458 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.8
What forecasters said that day
The local office's own words before this areal flood advisory 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 areal flood advisory went out at Jul 4, 3:23 AM CDT, 39 minutes earlier.
Area forecast discussion, Jul 4, 3:23 AM CDT, 39 minutes before
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</html>Hazardous weather outlook, Jul 3, 4:25 PM CDT, 11 hours 37 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 425 PM CDT FRI JUL 3 2009 IAZ070-071-081>083-092>096-041100- CASS-ADAIR-ADAMS-UNION-CLARKE-TAYLOR-RINGGOLD-DECATUR-WAYNE- APPANOOSE- 425 PM CDT FRI JUL 3 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA ALONG AND SOUTH OF A LINE FROM ATLANTIC TO OSCEOLA AND OTTUMWA. .DAY ONE...TONIGHT THUNDERSTORMS WILL SPREAD ACROSS IOWA TONIGHT. THERE IS A LOW THREAT FOR SEVERE WEATHER WITH THE PRIMARY THREAT FOR HAIL UP TO QUARTER SIZE. ADDITIONALLY...HEAVY RAINFALL IS FORECAST OVERNIGHT WITH AMOUNTS IN THE ONE AND TWO INCH RANGE WITH LOCALIZED AREAS RECEIVING AROUND 3 INCHES OF RAIN. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SCATTERED THUNDERSTORMS WILL BE POSSIBLE DURING THE MORNING SATURDAY NO SEVERE WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING. ANY HEAVY RAINFALL REPORTS WOULD ALSO BE APPRECIATED. IAZ044>050-057>062-072>075-084>086-097-041100- CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE- DALLAS-POLK-JASPER-POWESHIEK-MADISON-WARREN-MARION-MAHASKA-LUCAS- MONROE-WAPELLO-DAVIS- 425 PM CDT FRI JUL 3 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA BETWEEN HIGHWAY 92 AND HIGHWAY 30. .DAY ONE...TONIGHT SCATTERED NON SEVERE THUNDERSTORMS WILL OCCUR OVERNIGHT. HEAVY RAINFALL IS FORECAST AS WELL OVERNIGHT WITH AMOUNTS IN THE ONE AND TWO INCH RANGE WITH LOCALIZED AREAS RECEIVING AROUND 3 INCHES OF RAIN. LOCALIZED FLOODING MAY RESULT FROM THE HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SCATTERED THUNDERSTORMS WILL BE POSSIBLE DURING SATURDAY MORNING. NO SEVERE WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED THIS EVENING. HOWEVER...REPORTS OF HEAVY RAINFALL WOULD BE APPRECIATED. IAZ004>007-015>017-023>028-033>039-041100- EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK- 425 PM CDT FRI JUL 3 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA ALONG AND NORTH OF HIGHWAY 20. .DAY ONE...TONIGHT SCATTERED NON SEVERE THUNDERSTORMS ARE EXPECTED TONIGHT. SOME AREAS OF HEAVY RAINFALL UP TO ONE INCH WITH ISOLATED HIGHER AMOUNTS WILL BE POSSIBLE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED. HOWEVER...ANY REPORTS OF HEAVY RAINFALL WOULD BE APPRECIATED. CC
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 2:31 AM CDT | Areal Flood Advisory | DMX | Cass | 6 hr |
| Jul 4, 5:44 AM CDT | Areal Flood Advisory | DMX | Appanoose, Davis, Decatur, Wayne | 6 hr |
| Jul 4, 8:52 AM CDT | River Flood Warning | DMX | Decatur | 43 hr |
| Jul 4, 8:52 AM CDT | River Flood Warning | DMX | Appanoose, Wayne | 27 hr |
| Jul 4, 11:17 AM CDT | Areal Flood Warning | DMX | Adair, Adams, Clarke, Decatur, Madison, Union and 1 more | 6 hr |
| Jul 4, 1:10 PM CDT | River Flood Warning | DMX | Lucas, Wayne | 26 hr |
Nearby
Areal Flood Advisories in Iowa, 2009Every areal flood advisory in 2009
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.