Alert archive / Iowa / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 74, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 12, 2010, 4:16 PM CDT for Adair County, Dallas County, Madison County, Iowa. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 12, 2010, 4:16 PM CDT (21:16 UTC)
- Expired
- May 12, 2010, 5:00 PM CDT
- In force
- 44 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Adair County, IA, Dallas County, IA, Madison County, IA
The radar
The Des Moines radar (KDMX), 49 km from the middle of the area, began a volume at 21:19 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, 9.3 hours before the alert went out and 299 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
- 6 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 453 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 734 m²/s²
- 0-3 km storm-relative helicity
- 915 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 14.8
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 12, 3:36 PM CDT, 40 minutes earlier.
Area forecast discussion, May 12, 3:36 PM CDT, 40 minutes before
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</html>Hazardous weather outlook, May 12, 3:51 PM CDT, 25 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 351 PM CDT WED MAY 12 2010 IAZ048>050-060>062-072>075-082>086-092>097-132100- STORY-MARSHALL-TAMA-POLK-JASPER-POWESHIEK-MADISON-WARREN-MARION- MAHASKA-UNION-CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR-RINGGOLD-DECATUR- WAYNE-APPANOOSE-DAVIS- 351 PM CDT WED MAY 12 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...THIS AFTERNOON AND TONIGHT A FLASH FLOOD WATCH IS IN EFFECT FOR THE AREA. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS EVENING AND CONTINUE ACROSS THE AREA TONIGHT. LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREAT WITH THE SEVERE WEATHER. IN ADDITION TO THE SEVERE WEATHER POTENTIAL...AREAS OF FLASH FLOODING ARE POSSIBLE AS THE GROUND IS STILL VERY SATURATED FROM THE RAIN EARLIER IN THE WEEK AND THE RAINFALL AMOUNTS FORECAST FOR TONIGHT RANGE FROM 2 TO 3 INCHES AND LOCALLY HIGHER AMOUNTS. RIVER FLOODING MAY ALSO POSE A PROBLEM IN SOME AREAS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME...THOUGH RIVER FLOODING MAY BE A PROBLEM IN SOME AREAS OVER THE NEXT SEVERAL DAYS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAYBE NEEDED TONIGHT. RAINFALL REPORTS WOULD ALSO BE APPRECIATED IN ADDITION TO HAIL AND WIND REPORTS. IAZ004>007-015>017-023>028-033>039-044>047-057>059-070-071-081- 132100- 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-AUDUBON-GUTHRIE-DALLAS-CASS-ADAIR-ADAMS- 351 PM CDT WED MAY 12 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS ARE POSSIBLE LATE THROUGH TONIGHT. THE SEVERE THREAT IS LOW...BUT AN ISOLATED SEVERE THUNDERSTORM COULD PRODUCE LARGE HAIL ALONG AND SOUTH OF HIGHWAY 20. LOCALLY HEAVY RAIN IS ALSO EXPECTED WERE UP TO 2 INCHES OF NEW RAINFALL MAY ACCUMULATE BY LATE TONIGHT. AT THIS TIME THE SOIL MOISTURE SITUATION WOULD ALLOW FOR LOCALLY HEAVY RAINFALL TO OCCUR WITH MINIMAL WATER ISSUES. SOME MINOR STREET FLOODING OR PONDING OF WATER WILL OCCUR IN THE HEAVIER STORMS THIS EVENING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED TONIGHT. REV
In the hours before
Local storm report, May 12, 2:50 PM CDT, 1 hour 26 minutes before
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</html>Local storm report, May 12, 2:54 PM CDT, 1 hour 22 minutes before
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</html>Local storm report, May 12, 2:59 PM CDT, 1 hour 17 minutes before
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</html>Local storm report, May 12, 3:12 PM CDT, 1 hour 4 minutes before
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</html>Local storm report, May 12, 3:27 PM CDT, 49 minutes before
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</html>Local storm report, May 12, 3:52 PM CDT, 24 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 |
|---|---|---|---|---|
| May 12, 4:04 AM CDT | Flash Flood Watch | DMX | Appanoose, Clarke, Davis, Decatur, Jasper, Lucas and 15 more | 26 hr |
| May 12, 11:11 AM CDT | River Flood Warning | DMX | Mahaska, Marion | 50 hr |
| May 12, 11:11 AM CDT | River Flood Warning | DMX | Decatur | 34 hr |
| May 12, 11:11 AM CDT | River Flood Warning | DMX | Appanoose, Wayne | 42 hr |
| May 12, 1:38 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Guthrie | 37 min |
| May 12, 2:05 PM CDT | Severe Thunderstorm Warning | DMX | Franklin, Hamilton, Hardin, Wright | 40 min |
| May 12, 2:40 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Greene, Guthrie | 50 min |
| May 12, 2:48 PM CDT | Areal Flood Advisory | DMX | Audubon, Greene, Guthrie | 3 hr |
| May 12, 3:35 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton | 40 min |
| May 12, 4:14 PM CDT | Areal Flood Advisory | DMX | Boone, Hamilton, Hardin, Webster | 3 hr |
| May 12, 4:54 PM CDT | River Flood Warning | DMX | Madison, Warren | 62 hr |
| May 12, 5:09 PM CDT | Areal Flood Advisory | DMX | Black Hawk, Bremer, Butler, Grundy | 3 hr |
| May 12, 6:03 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Polk | 28 min |
| May 12, 6:51 PM CDT | Severe Thunderstorm Warning | DMX | Grundy, Marshall, Tama | 24 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2010Every severe thunderstorm warning 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.