Alert archive / Iowa / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 227, NWS Des Moines, IA

June 26, 20104 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 26, 2010, 4:30 AM CDT for 4 counties in Iowa. It was in force for 60 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 26, 2010, 4:30 AM CDT (09:30 UTC)
Expired
Jun 26, 2010, 5:30 AM CDT
In force
60 min
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Humboldt County, IA, Kossuth County, IA, Palo Alto County, IA, Pocahontas County, IA

The radar

The Des Moines radar (KDMX), 148 km from the middle of the area, began a volume at 09:31 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 25, 9:06 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 9.5 hours before the alert went out and 222 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, Minneapolis, MN at 00:00Z on 2010-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1350 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2010-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 166 square meters per square second.19395878Sfc1 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
1350 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
1067 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
166 m²/s²
0-3 km storm-relative helicity
350 m²/s²
Significant tornado parameter
2.6
Supercell composite
13.6

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 26, 4:23 AM CDT, 7 minutes earlier.

Area forecast discussion, Jun 26, 4:23 AM CDT, 7 minutes before
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Hazardous weather outlook, Jun 25, 3:38 PM CDT, 12 hours 52 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
338 PM CDT FRI JUN 25 2010

IAZ033-034-044>049-057>062-070>075-081>086-092>097-261100-
SAC-CALHOUN-CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL-AUDUBON-
GUTHRIE-DALLAS-POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON-WARREN-
MARION-MAHASKA-ADAMS-UNION-CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR-
RINGGOLD-DECATUR-WAYNE-APPANOOSE-DAVIS-
338 PM CDT FRI JUN 25 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A CHANCE OF THUNDERSTORMS FROM THIS EVENING THROUGH
TONIGHT. THE BEST CHANCES WILL BE FURTHER NORTHEAST...WITH
ISOLATED SEVERE THUNDERSTORMS AND LOCALLY HEAVY RAIN POSSIBLE
MAINLY NORTH OF HIGHWAY 30. THE PRIMARY SEVERE WEATHER THREAT WILL
BE STRONG WINDS.

RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR PORTIONS OF THE AREA.
PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT
WEATHER.GOV/DESMOINES FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

ADDITIONAL THUNDERSTORM CHANCES ARE FORECAST FROM SATURDAY
EVENING INTO SUNDAY. SOME STORMS COULD BE SEVERE DURING THIS
PERIOD.

RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR THE AREA. PLEASE REFER
TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES
FOR FURTHER DETAILS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT AND POSSIBLY SATURDAY
AFTERNOON AND NIGHT.

IAZ004>007-015>017-023>028-035>039-050-261100-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-WEBSTER-HAMILTON-
HARDIN-GRUNDY-BLACK HAWK-TAMA-
338 PM CDT FRI JUN 25 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORMS ARE EXPECTED TO MOVE INTO THE AREA THIS EVENING AND
EARLY TONIGHT...WITH SEVERE WEATHER AND LOCALLY HEAVY RAIN LIKELY.
THE GREATEST SEVERE WEATHER THREAT WILL BE FOR STRONG DAMAGING
WINDS...HOWEVER LARGE HAIL AND ISOLATED TORNADOES ARE ALSO
POSSIBLE. IN ADDITION...SOME AREAS ARE STILL SATURATED FROM HEAVY
RAINS EARLIER THIS WEEK AND ANY ADDITIONAL HEAVY RAINFALL COULD
LEAD TO MORE FLOODING.

RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR PORTIONS OF THE AREA.
PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT
WEATHER.GOV/DESMOINES FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

ADDITIONAL THUNDERSTORM CHANCES ARE FORECAST FROM SATURDAY
AFTERNOON INTO SUNDAY. SOME STORMS COULD BE SEVERE DURING THIS
PERIOD.

RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR THE AREA. PLEASE REFER
TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES
FOR FURTHER DETAILS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING AND TONIGHT AND POSSIBLY
SATURDAY AFTERNOON AND NIGHT.

LEE

In the hours before

Local storm report, Jun 26, 1:23 AM CDT, 3 hours 7 minutes before
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Special weather statement, Jun 26, 1:26 AM CDT, 3 hours 4 minutes before
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Special weather statement, Jun 26, 2:25 AM CDT, 2 hours 5 minutes before
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Local storm report, Jun 26, 2:31 AM CDT, 1 hour 59 minutes before
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Special weather statement, Jun 26, 2:53 AM CDT, 1 hour 37 minutes before
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Local storm report, Jun 26, 3:50 AM CDT, 40 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 25, 8:24 PM CDTSevere Thunderstorm WarningDMXCerro Gordo, Hancock, Kossuth, Winnebago, Worth66 min
Jun 25, 8:39 PM CDTTornado WarningDMXCerro Gordo, Worth39 min
Jun 25, 9:11 PM CDTSevere Thunderstorm WarningDMXButler, Cerro Gordo, Franklin49 min
Jun 25, 9:26 PM CDTSevere Thunderstorm WarningDMXEmmet, Hancock, Humboldt, Kossuth, Palo Alto, Winnebago and 1 more49 min
Jun 25, 9:38 PM CDTSevere Thunderstorm WarningDMXEmmet, Palo Alto67 min
Jun 25, 9:58 PM CDTSevere Thunderstorm WarningDMXBlack Hawk, Bremer, Butler47 min
Jun 25, 10:02 PM CDTSevere Thunderstorm WarningDMXButler, Franklin, Grundy, Hamilton, Hardin, Humboldt and 2 more43 min
Jun 25, 10:06 PM CDTTornado WarningDMXWright24 min
Jun 25, 10:09 PM CDTTornado WarningDMXHumboldt, Wright12 min
Jun 25, 10:17 PM CDTFlash Flood WarningDMXButler, Franklin, Wright6 hr
Jun 25, 10:35 PM CDTSevere Thunderstorm WarningDMXBlack Hawk, Bremer, Butler, Grundy40 min
Jun 25, 10:37 PM CDTSevere Thunderstorm WarningDMXCalhoun, Emmet, Humboldt, Kossuth, Palo Alto, Pocahontas and 2 more53 min
Jun 25, 10:40 PM CDTSevere Thunderstorm WarningDMXBoone, Grundy, Hamilton, Hardin, Marshall, Story and 2 more50 min
Jun 25, 11:23 PM CDTRiver Flood WarningDMXEmmet13 days
Jun 25, 11:31 PM CDTFlash Flood WarningDMXEmmet, Palo Alto6 hr
Jun 25, 11:33 PM CDTSevere Thunderstorm WarningDMXBoone, Dallas, Jasper, Polk, Story57 min
Jun 25, 11:35 PM CDTAreal Flood AdvisoryDMXEmmet, Kossuth, Palo Alto3 hr
Jun 25, 11:45 PM CDTSevere Thunderstorm WarningDMXHumboldt, Palo Alto, Pocahontas, Sac60 min
Jun 26, 12:13 AM CDTFlash Flood WarningDMXHumboldt, Pocahontas, Webster6 hr
Jun 26, 12:20 AM CDTSevere Thunderstorm WarningDMXHamilton, Humboldt, Pocahontas, Webster, Wright40 min
Jun 26, 12:45 AM CDTSevere Thunderstorm WarningDMXCalhoun, Pocahontas60 min
Jun 26, 1:38 AM CDTSevere Thunderstorm WarningDMXAppanoose, Davis, Monroe, Wapello37 min
Jun 26, 3:52 AM CDTSevere Thunderstorm WarningDMXPalo Alto38 min
Jun 26, 3:55 AM CDTFlash Flood WatchDMXAdair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more28 hr
Jun 26, 5:06 AM CDTRiver Flood WarningDMXWebster7 days
Jun 26, 5:09 AM CDTRiver Flood WarningDMXPalo Alto4 days
Jun 26, 5:29 AM CDTSevere Thunderstorm WarningDMXDallas, Polk23 min
Jun 26, 6:05 AM CDTAreal Flood WarningDMXHumboldt12 hr
Jun 26, 6:34 AM CDTRiver Flood WarningDMXMahaska6 days
Jun 26, 7:00 AM CDTAreal Flood WarningDMXPalo Alto12 hr
Jun 26, 9:54 AM CDTRiver Flood WarningDMXMadison, Warren5 hr
Jun 26, 4:22 PM CDTRiver Flood WarningDMXJasper, Marion, Polk4 hr
Jun 26, 4:34 PM CDTRiver Flood WarningDMXMarshall5 days

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.