Alert archive / Iowa / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 239, NWS Des Moines, IA

June 27, 20105 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 27, 2010, 4:44 AM CDT for 5 counties in Iowa. It was in force for 46 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
Jun 27, 2010, 4:44 AM CDT (09:44 UTC)
Expired
Jun 27, 2010, 5:30 AM CDT
In force
46 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Appanoose County, IA, Lucas County, IA, Marion County, IA, Monroe County, IA, Wayne County, IA

The radar

The Des Moines radar (KDMX), 99 km from the middle of the area, began a volume at 09:45 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 27, 2:52 AM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 9.7 hours before the alert went out and 277 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.

Skew-T log-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2010-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4268 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2010-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
4268 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1405 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
144 m²/s²
Significant tornado parameter
0.8
Supercell composite
10.0

Open this sounding in Storm Lab

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 Jun 27, 4:00 AM CDT, 44 minutes earlier.

Area forecast discussion, Jun 27, 4:00 AM CDT, 44 minutes before
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Hazardous weather outlook, Jun 27, 4:42 AM CDT, 2 minutes before
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In the hours before

Local storm report, Jun 27, 2:40 AM CDT, 2 hours 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
240 AM CDT SUN JUN 27 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0234 AM     FLASH FLOOD      4 NW JOLLEY             42.52N 94.76W
06/27/2010                   CALHOUN            IA   LAW ENFORCEMENT

            FLOODING ALONG HIGHWAY D15 NEAR GARBER AND JANESVILLE
            AVENUES...FROM POCAHONTAS COUNTY SHERIFF.

0234 AM     FLASH FLOOD      POMEROY                 42.55N 94.68W
06/27/2010                   CALHOUN            IA   LAW ENFORCEMENT

            UNDERPASS/VIADUCT FLOODING ALONG HIGHWAY 4. FROM CALHOUN
            COUNTY SHERIFF

&&

SMALL
Local storm report, Jun 27, 3:08 AM CDT, 1 hour 36 minutes before
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Special weather statement, Jun 27, 3:08 AM CDT, 1 hour 36 minutes before
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Special weather statement, Jun 27, 3:35 AM CDT, 1 hour 9 minutes before
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Local storm report, Jun 27, 3:36 AM CDT, 1 hour 8 minutes before
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Special weather statement, Jun 27, 3:56 AM CDT, 48 minutes before
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The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 26, 8:18 PM CDTRiver Flood WarningDMXCerro Gordo, Floyd, Worth32 hr
Jun 26, 8:33 PM CDTSevere Thunderstorm WarningDMXEmmet, Kossuth, Palo Alto57 min
Jun 26, 9:12 PM CDTSevere Thunderstorm WarningDMXEmmet, Hancock, Kossuth, Winnebago48 min
Jun 26, 9:27 PM CDTFlash Flood WarningDMXEmmet, Palo Alto6 hr
Jun 26, 9:28 PM CDTSevere Thunderstorm WarningDMXEmmet, Hancock, Humboldt, Kossuth, Palo Alto, Pocahontas47 min
Jun 26, 9:32 PM CDTAreal Flood AdvisoryDMXEmmet, Palo Alto3 hr
Jun 26, 10:02 PM CDTSevere Thunderstorm WarningDMXCerro Gordo, Hancock, Winnebago, Worth58 min
Jun 26, 10:26 PM CDTAreal Flood AdvisoryDMXCerro Gordo, Hancock, Humboldt, Kossuth, Pocahontas, Webster and 3 more3 hr
Jun 26, 11:18 PM CDTSevere Thunderstorm WarningDMXCalhoun, Humboldt, Pocahontas, Webster39 min
Jun 27, 12:09 AM CDTSevere Thunderstorm WarningDMXSac43 min
Jun 27, 12:32 AM CDTAreal Flood AdvisoryDMXBlack Hawk, Bremer, Butler, Calhoun, Franklin, Grundy and 6 more4 hr
Jun 27, 12:52 AM CDTFlash Flood WarningDMXCalhoun, Pocahontas, Sac6 hr
Jun 27, 1:27 AM CDTSevere Thunderstorm WarningDMXCalhoun, Carroll, Crawford, Sac37 min
Jun 27, 1:49 AM CDTSevere Thunderstorm WarningDMXCalhoun, Carroll, Greene, Webster41 min
Jun 27, 1:50 AM CDTFlash Flood WarningDMXWebster6 hr
Jun 27, 2:03 AM CDTAreal Flood AdvisoryDMXBoone, Carroll, Crawford, Greene4 hr
Jun 27, 2:10 AM CDTRiver Flood WarningDMXDallas, Greene7 days
Jun 27, 2:56 AM CDTFlash Flood WarningDMXCalhoun, Carroll, Crawford, Sac6 hr
Jun 27, 3:00 AM CDTFlash Flood WarningDMXBoone, Greene6 hr
Jun 27, 3:12 AM CDTAreal Flood AdvisoryDMXAudubon, Dallas, Guthrie4 hr
Jun 27, 3:52 AM CDTAreal Flood AdvisoryDMXJasper, Marshall, Polk, Poweshiek, Story, Tama4 hr
Jun 27, 4:18 AM CDTSevere Thunderstorm WarningDMXLucas, Marion, Warren42 min
Jun 27, 4:34 AM CDTSevere Thunderstorm WarningDMXJasper, Mahaska, Marion, Monroe41 min
Jun 27, 4:50 AM CDTRiver Flood WarningDMXPolk9 hr
Jun 27, 4:53 AM CDTRiver Flood WarningDMXPolk17 hr
Jun 27, 5:30 AM CDTRiver Flood WarningDMXDallas, Polk9 hr
Jun 27, 5:58 AM CDTRiver Flood WarningDMXBlack Hawk, Bremer, Butler30 hr
Jun 27, 6:30 AM CDTRiver Flood WarningDMXPolk, Story40 hr
Jun 27, 6:32 AM CDTRiver Flood WarningDMXJasper, Marion, Polk62 hr
Jun 27, 6:34 AM CDTRiver Flood WarningDMXStory15 hr
Jun 27, 7:19 AM CDTRiver Flood WarningDMXPolk9 days
Jun 27, 7:20 AM CDTRiver Flood WarningDMXMadison, Warren3 days
Jun 27, 9:34 AM CDTRiver Flood WarningDMXHumboldt26 hr
Jun 27, 9:34 AM CDTRiver Flood WarningDMXPolk4 days
Jun 27, 10:39 AM CDTRiver Flood WarningDMXDallas, Polk49 hr
Jun 27, 10:41 AM CDTRiver Flood WarningDMXPolk7 days
Jun 27, 11:46 AM CDTRiver Flood WarningDMXPolk9 days
Jun 27, 11:59 AM CDTRiver Flood WarningDMXMadison, Warren10 hr
Jun 27, 3:26 PM CDTRiver Flood WarningDMXCass7 hr

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.