Alert archive / Iowa / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 190, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 13, 2009, 11:47 AM CDT for Kossuth County, Winnebago County, Iowa. It was in force for 40 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
- Aug 13, 2009, 11:47 AM CDT (16:47 UTC)
- Expired
- Aug 13, 2009, 12:27 PM CDT
- In force
- 40 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
Counties Kossuth County, IA, Winnebago County, IA
The radar
The Des Moines radar (KDMX), 175 km from the middle of the area, began a volume at 16:51 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
Minneapolis, MN (KMPX), launched 12:00Z, 4.8 hours before the alert went out and 176 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
- 1822 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 692 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Aug 13, 6:25 AM CDT, 5 hours 22 minutes earlier.
Area forecast discussion, Aug 13, 6:25 AM CDT, 5 hours 22 minutes before
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</html>Hazardous weather outlook, Aug 13, 5:22 AM CDT, 6 hours 25 minutes before
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</html>In the hours before
Special weather statement, Aug 13, 11:32 AM CDT, 15 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1132 AM CDT THU AUG 13 2009 IAZ005-006-016-131700- HANCOCK-KOSSUTH-WINNEBAGO- 1132 AM CDT THU AUG 13 2009 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL KOSSUTH...NORTHWESTERN HANCOCK AND WESTERN WINNEBAGO COUNTIES UNTIL NOON CDT... AT 1131 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 5 MILES EAST OF BANCROFT...OR 47 MILES WEST OF MASON CITY...MOVING EAST AT 20 MPH. NICKEL SIZE HAIL...AND WINDS IN EXCESS OF 50 MPH ARE EXPECTED WITH THIS STORM. PODRAZIK
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 2:44 AM CDT | Areal Flood Advisory | DMX | Black Hawk, Bremer, Butler | 5 hr |
| Aug 13, 12:45 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Kossuth, Winnebago | 30 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2009Every severe thunderstorm warning 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.