Alert archive / Iowa / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 237, NWS Des Moines, IA

June 27, 2010Lucas County, Marion County, Warren County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 27, 2010, 4:18 AM CDT for Lucas County, Marion County, Warren County, Iowa. It was in force for 42 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, 4:18 AM CDT (09:18 UTC)
Expired: Jun 27, 2010, 5:00 AM CDT
In force: 42 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Lucas County, IA, Marion County, IA, Warren County, IA

The radar

The Des Moines radar (KDMX), 64 km from the middle of the area, began a volume at 09:22 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.

Issued	Product	Office	Lasted
Jun 27, 2:52 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 9.3 hours before the alert went out and 254 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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, 18 minutes earlier.

Area forecast discussion, Jun 27, 4:00 AM CDT, 18 minutes before

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Hazardous weather outlook, Jun 26, 4:32 PM CDT, 11 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
432 PM CDT SAT JUN 26 2010

IAZ004>007-015>017-023>026-272145-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-
432 PM CDT SAT JUN 26 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN PORTIONS OF
CENTRAL IOWA.

.DAY ONE...TONIGHT

THUNDERSTORMS WILL MOVE ACROSS NORTHERN IOWA THIS EVENING AND INTO
THE OVERNIGHT. HAIL AND DAMAGING WINDS ARE POSSIBLE...AND THERE IS A
MODERATE RISK OF SEVERE WEATHER FROM ALGONA NORTH AND WEST. A FEW
STORMS MAY ALSO PRODUCE A TORNADO THIS EVENING. HEAVY RAINFALL IS
ALSO LIKELY WITH THE STORMS...AND 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.

RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR PORTIONS OF THE AREA.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

ADDITIONAL NON-SEVERE THUNDERSTORM CHANCES EXIST SUNDAY MORNING.

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.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS EVENING INTO TONIGHT.

IAZ027-028-033>039-044>050-058>061-072>074-272145-
BUTLER-BREMER-SAC-CALHOUN-WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-
CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL-TAMA-GUTHRIE-DALLAS-
POLK-JASPER-MADISON-WARREN-MARION-
432 PM CDT SAT JUN 26 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TONIGHT

THUNDERSTORMS ARE EXPECTED TO MOVE INTO CENTRAL IOWA LATE THIS
EVENING THROUGH THE OVERNIGHT HOURS. DAMAGING WINDS ARE POSSIBLE
WITH THESE STORMS...ALONG WITH HEAVY RAINFALL ON SATURATED GROUND. 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.

RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR PORTIONS OF THE AREA AS
WELL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

ADDITIONAL NON-SEVERE THUNDERSTORM CHANCES EXIST SUNDAY THROUGH
NOON.

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.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED TONIGHT.

IAZ057-062-070-071-075-081>086-092>097-272145-
AUDUBON-POWESHIEK-CASS-ADAIR-MAHASKA-ADAMS-UNION-CLARKE-LUCAS-MONROE-
WAPELLO-TAYLOR-RINGGOLD-DECATUR-WAYNE-APPANOOSE-DAVIS-
432 PM CDT SAT JUN 26 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN PORTIONS OF
CENTRAL IOWA.

.DAY ONE...TONIGHT

THUNDERSTORMS ARE EXPECTED LATE THIS EVENING IN THE WEST...AND
AFTER MIDNIGHT FARTHER EAST. DAMAGING WINDS ARE POSSIBLE...AND
LOCALLY HEAVY RAINFALL IS ALSO A THREAT.

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...SUNDAY THROUGH FRIDAY

ADDITIONAL THUNDERSTORM CHANCES EXIST THROUGH MID AFTERNOON
SUNDAY.

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.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AFTER MIDNIGHT THROUGH SUNDAY MID
MORNING.

JUNGBLUTH

In the hours before

Local storm report, Jun 27, 2:40 AM CDT, 1 hour 38 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 10 minutes before

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Special weather statement, Jun 27, 3:08 AM CDT, 1 hour 10 minutes before

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Special weather statement, Jun 27, 3:35 AM CDT, 43 minutes before

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Local storm report, Jun 27, 3:36 AM CDT, 42 minutes before

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Special weather statement, Jun 27, 3:56 AM CDT, 22 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 8:18 PM CDT	River Flood Warning	DMX	Cerro Gordo, Floyd, Worth	32 hr
Jun 26, 8:33 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Kossuth, Palo Alto	57 min
Jun 26, 9:12 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Hancock, Kossuth, Winnebago	48 min
Jun 26, 9:27 PM CDT	Flash Flood Warning	DMX	Emmet, Palo Alto	6 hr
Jun 26, 9:28 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Hancock, Humboldt, Kossuth, Palo Alto, Pocahontas	47 min
Jun 26, 9:32 PM CDT	Areal Flood Advisory	DMX	Emmet, Palo Alto	3 hr
Jun 26, 10:02 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Winnebago, Worth	58 min
Jun 26, 10:26 PM CDT	Areal Flood Advisory	DMX	Cerro Gordo, Hancock, Humboldt, Kossuth, Pocahontas, Webster and 3 more	3 hr
Jun 26, 11:18 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Humboldt, Pocahontas, Webster	39 min
Jun 27, 12:09 AM CDT	Severe Thunderstorm Warning	DMX	Sac	43 min
Jun 27, 12:32 AM CDT	Areal Flood Advisory	DMX	Black Hawk, Bremer, Butler, Calhoun, Franklin, Grundy and 6 more	4 hr
Jun 27, 12:52 AM CDT	Flash Flood Warning	DMX	Calhoun, Pocahontas, Sac	6 hr
Jun 27, 1:27 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Crawford, Sac	37 min
Jun 27, 1:49 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene, Webster	41 min
Jun 27, 1:50 AM CDT	Flash Flood Warning	DMX	Webster	6 hr
Jun 27, 2:03 AM CDT	Areal Flood Advisory	DMX	Boone, Carroll, Crawford, Greene	4 hr
Jun 27, 2:10 AM CDT	River Flood Warning	DMX	Dallas, Greene	7 days
Jun 27, 2:56 AM CDT	Flash Flood Warning	DMX	Calhoun, Carroll, Crawford, Sac	6 hr
Jun 27, 3:00 AM CDT	Flash Flood Warning	DMX	Boone, Greene	6 hr
Jun 27, 3:12 AM CDT	Areal Flood Advisory	DMX	Audubon, Dallas, Guthrie	4 hr
Jun 27, 3:52 AM CDT	Areal Flood Advisory	DMX	Jasper, Marshall, Polk, Poweshiek, Story, Tama	4 hr
Jun 27, 4:34 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Monroe	41 min
Jun 27, 4:44 AM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Lucas, Marion, Monroe, Wayne	46 min
Jun 27, 4:50 AM CDT	River Flood Warning	DMX	Polk	9 hr
Jun 27, 4:53 AM CDT	River Flood Warning	DMX	Polk	17 hr
Jun 27, 5:30 AM CDT	River Flood Warning	DMX	Dallas, Polk	9 hr
Jun 27, 5:58 AM CDT	River Flood Warning	DMX	Black Hawk, Bremer, Butler	30 hr
Jun 27, 6:30 AM CDT	River Flood Warning	DMX	Polk, Story	40 hr
Jun 27, 6:32 AM CDT	River Flood Warning	DMX	Jasper, Marion, Polk	62 hr
Jun 27, 6:34 AM CDT	River Flood Warning	DMX	Story	15 hr
Jun 27, 7:19 AM CDT	River Flood Warning	DMX	Polk	9 days
Jun 27, 7:20 AM CDT	River Flood Warning	DMX	Madison, Warren	3 days
Jun 27, 9:34 AM CDT	River Flood Warning	DMX	Humboldt	26 hr
Jun 27, 9:34 AM CDT	River Flood Warning	DMX	Polk	4 days
Jun 27, 10:39 AM CDT	River Flood Warning	DMX	Dallas, Polk	49 hr
Jun 27, 10:41 AM CDT	River Flood Warning	DMX	Polk	7 days
Jun 27, 11:46 AM CDT	River Flood Warning	DMX	Polk	9 days
Jun 27, 11:59 AM CDT	River Flood Warning	DMX	Madison, Warren	10 hr
Jun 27, 3:26 PM CDT	River Flood Warning	DMX	Cass	7 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2010 Every 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.