Alert archive / Iowa / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 107, NWS Des Moines, IA

June 23, 20094 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 23, 2009, 4:01 PM CDT for 4 counties in 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: Jun 23, 2009, 4:01 PM CDT (21:01 UTC)
Expired: Jun 23, 2009, 4:45 PM CDT
In force: 44 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon

Counties Black Hawk County, IA, Grundy County, IA, Marshall County, IA, Tama County, IA

The radar

The Des Moines radar (KDMX), 105 km from the middle of the area, began a volume at 21:01 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 23, 12:01 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

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 23, 3:34 PM CDT, 27 minutes earlier.

Area forecast discussion, Jun 23, 3:34 PM CDT, 27 minutes before

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Hazardous weather outlook, Jun 23, 3:25 PM CDT, 36 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
325 PM CDT TUE JUN 23 2009

IAZ057>060-070>074-081>085-092>096-242030-
AUDUBON-GUTHRIE-DALLAS-POLK-CASS-ADAIR-MADISON-WARREN-MARION-
ADAMS-UNION-CLARKE-LUCAS-MONROE-TAYLOR-RINGGOLD-DECATUR-WAYNE-
APPANOOSE-
325 PM CDT TUE JUN 23 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS EVENING AND TONIGHT

VERY HOT AND HUMID CONDITIONS WILL PERSIST TODAY. AN EXCESSIVE
HEAT WARNING IS IN EFFECT FOR THE AREA TONIGHT. PLEASE REFER TO THE
NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR
FURTHER DETAILS.

ADDITIONAL THUNDERSTORMS ARE POSSIBLE THIS EVENING AND TONIGHT. STORMS
COULD BE SEVERE...WITH 60 MPH WIND GUSTS AND HEAVY RAINFALL THE MAIN
THREATS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

HOT AND HUMID CONDITIONS WILL PERSIST WEDNESDAY...WITH AFTERNOON
HEAT INDEX VALUES GREATER THAN 110 DEGREES EXPECTED THROUGH WEDNESDAY.
AN EXCESSIVE HEAT WARNING IS IN EFFECT FOR THE AREA THROUGH
WEDNESDAY EVENING. PLEASE REFER TO THE NATIONAL WEATHER SERVICE
WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS.

MORE THUNDERSTORMS ARE EXPECTED WEDNESDAY INTO THURSDAY MORNING.
ISOLATED SEVERE STORMS AND LOCALLY HEAVY RAINFALL ARE POSSIBLE...ESPECIALLY
WEDNESDAY NIGHT. ADDITIONAL THUNDERSTORM CHANCES ARRIVE FRIDAY
NIGHT AND SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED AT VARIOUS TIMES THIS AFTERNOON THROUGH
WEDNESDAY NIGHT.

IAZ006-007-016-017-025>028-036>039-044>050-061-062-075-086-097-
242030-
WINNEBAGO-WORTH-HANCOCK-CERRO GORDO-WRIGHT-FRANKLIN-BUTLER-BREMER-
HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE-BOONE-
STORY-MARSHALL-TAMA-JASPER-POWESHIEK-MAHASKA-WAPELLO-DAVIS-
325 PM CDT TUE JUN 23 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

VERY HOT AND HUMID CONDITIONS ARE EXPECTED THIS AFTERNOON. A HEAT
ADVISORY IS IN EFFECT FOR THE AREA THIS AFTERNOON THROUGH 7 PM.
PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT
WEATHER.GOV/DESMOINES FOR FURTHER DETAILS.

THUNDERSTORMS ARE EXPECTED LATE THIS EVENING AND TONIGHT. SOME STORMS
COULD BE SEVERE...WITH ISOLATED 60 MPH WIND GUSTS AND HEAVY RAINFALL THE
MAIN THREATS. LOCALLY HEAVY RAINFALL IS EXPECTED...AND ISOLATED FLASH
FLOODING CANNOT BE RULED OUT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

MORE THUNDERSTORMS ARE EXPECTED WEDNESDAY INTO THURSDAY MORNING.
ISOLATED SEVERE STORMS AND LOCALLY HEAVY RAINFALL ARE POSSIBLE...ESPECIALLY
WEDNESDAY NIGHT. ADDITIONAL THUNDERSTORM CHANCES ARRIVE FRIDAY
NIGHT AND SATURDAY. A HEAT ADVISORY IS IN EFFECT FOR PORTIONS OF THE AREA
THROUGH 9 PM WEDNESDAY. PLEASE REFER TO THE NATIONAL WEATHER
SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED AT VARIOUS TIMES TONIGHT
THROUGH WEDNESDAY NIGHT.

IAZ004-005-015-023-024-033>035-242030-
EMMET-KOSSUTH-PALO ALTO-POCAHONTAS-HUMBOLDT-SAC-CALHOUN-WEBSTER-
325 PM CDT TUE JUN 23 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

ADDITIONAL THUNDERSTORMS ARE EXPECTED LATE TONIGHT. LOCALLY HEAVY
RAINFALL IS POSSIBLE...AND ISOLATED FLASH FLOODING CANNOT BE RULED OUT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

MORE THUNDERSTORMS ARE EXPECTED WEDNESDAY INTO THURSDAY MORNING.
ISOLATED SEVERE STORMS AND LOCALLY HEAVY RAINFALL ARE POSSIBLE...ESPECIALLY
WEDNESDAY NIGHT. ADDITIONAL THUNDERSTORM CHANCES ARRIVE FRIDAY
NIGHT AND SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED AT VARIOUS TIMES TONIGHT
THROUGH WEDNESDAY NIGHT.

REV

In the hours before

Local storm report, Jun 23, 3:39 PM CDT, 22 minutes before

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Local storm report, Jun 23, 3:42 PM CDT, 19 minutes before

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Local storm report, Jun 23, 3:46 PM CDT, 15 minutes before

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Local storm report, Jun 23, 3:51 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DES MOINES IA
351 PM CDT TUE JUN 23 2009

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

0326 PM     TSTM WND DMG     10 N POPEJOY            42.74N 93.43W
06/23/2009                   FRANKLIN           IA   TRAINED SPOTTER

            TWO SEMIS BLOWN OVER BETWEEN MP159 AND 165 ON I-35

&&

LEE

Local storm report, Jun 23, 3:58 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
358 PM CDT TUE JUN 23 2009

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

0305 PM     TSTM WND DMG     4 S SHEFFIELD           42.83N 93.22W
06/23/2009                   FRANKLIN           IA   STORM CHASER

            EXTENSIVE TREE DAMAGE NEAR CHAPIN. TIME ESTIMATED.

&&

SMALL

Local storm report, Jun 23, 4:00 PM CDT, 1 minute 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 23, 1:31 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Kossuth, Palo Alto, Pocahontas	44 min
Jun 23, 1:39 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene, Sac	51 min
Jun 23, 1:53 PM CDT	Tornado Warning	DMX	Calhoun, Webster	24 min
Jun 23, 2:15 PM CDT	Excessive Heat Warning	DMX	Adair, Adams, Appanoose, Audubon, Cass, Clarke and 13 more	20 hr
Jun 23, 2:40 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hancock, Wright	50 min
Jun 23, 2:49 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hancock, Winnebago, Worth, Wright	41 min
Jun 23, 3:14 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Cerro Gordo, Franklin, Hardin	46 min
Jun 23, 3:15 PM CDT	Areal Flood Advisory	DMX	Franklin, Wright	90 min
Jun 23, 3:23 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene	52 min
Jun 23, 3:25 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Butler, Grundy, Hardin	50 min
Jun 23, 3:35 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Polk	55 min
Jun 23, 3:48 PM CDT	Severe Thunderstorm Warning	DMX	Polk, Story	57 min
Jun 23, 4:03 PM CDT	Areal Flood Advisory	DMX	Dallas, Polk	6 hr
Jun 23, 4:09 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Butler, Grundy	51 min
Jun 23, 4:12 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Polk	48 min
Jun 23, 4:12 PM CDT	Tornado Warning	DMX	Black Hawk	33 min
Jun 23, 4:18 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Poweshiek, Story, Tama	57 min
Jun 23, 4:20 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Polk, Warren	55 min
Jun 23, 4:28 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Guthrie, Madison	62 min
Jun 23, 4:33 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Audubon, Cass, Guthrie	42 min
Jun 23, 4:42 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy, Jasper, Marshall, Poweshiek, Tama	48 min
Jun 23, 4:44 PM CDT	Areal Flood Advisory	DMX	Madison, Warren	3 hr
Jun 23, 4:50 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Dallas, Guthrie	40 min
Jun 23, 4:58 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer	16 min
Jun 23, 4:58 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Marion, Monroe, Warren	47 min
Jun 23, 5:00 PM CDT	Areal Flood Advisory	DMX	Adair, Guthrie	119 min
Jun 23, 5:00 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Polk, Warren	45 min
Jun 23, 5:11 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Poweshiek	49 min
Jun 23, 5:13 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass, Madison, Union	47 min
Jun 23, 5:22 PM CDT	Flash Flood Warning	DMX	Adair, Dallas, Guthrie, Madison	6 hr
Jun 23, 5:27 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Guthrie, Madison	33 min
Jun 23, 5:38 PM CDT	Areal Flood Advisory	DMX	Madison	3 hr
Jun 23, 5:42 PM CDT	Severe Thunderstorm Warning	DMX	Davis, Monroe, Wapello	48 min
Jun 23, 6:02 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Clarke, Madison, Union, Warren	28 min
Jun 23, 6:28 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	32 min
Jun 23, 6:40 PM CDT	Flash Flood Warning	DMX	Polk	6 hr
Jun 23, 6:47 PM CDT	Severe Thunderstorm Warning	DMX	Decatur	28 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2009 Every 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; radar from the NEXRAD Level II archive.