Alert archive / Iowa / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 60, NWS Des Moines, IA

June 8, 2009Decatur County, Ringgold County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 8, 2009, 12:38 AM CDT for Decatur County, Ringgold County, Iowa. It was in force for 21 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 8, 2009, 12:38 AM CDT (05:38 UTC)
Expired: Jun 8, 2009, 12:59 AM CDT
In force: 21 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon

Counties Decatur County, IA, Ringgold County, IA

The radar

The Des Moines radar (KDMX), 113 km from the middle of the area, began a volume at 05:41 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 7, 10:53 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 5.6 hours before the alert went out and 208 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: 1712 J/kg
Mixed-layer CIN: -173 J/kg
Mixed-layer LCL: 750 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 246 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.6

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 8, 12:38 AM CDT, 0 minutes earlier.

Area forecast discussion, Jun 8, 12:38 AM CDT, 0 minutes before

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Hazardous weather outlook, Jun 7, 3:23 PM CDT, 9 hours 15 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
323 PM CDT SUN JUN 7 2009

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-081100-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN-
WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE-
BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-
POWESHIEK-CASS-ADAIR-MADISON-WARREN-MARION-MAHASKA-ADAMS-UNION-
CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR-RINGGOLD-DECATUR-WAYNE-
APPANOOSE-DAVIS-
323 PM CDT SUN JUN 7 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS WILL DEVELOP LATE THIS AFTERNOON AND
BECOME MORE WIDESPREAD ACRO 2 INCHES OF
RAINFALL RECENTLY COULD HAVE SOME ISOLATED FLASH FLOODING
TONIGHT...ALTHOUGH A WIDESPREAD THREAT IS NOT ANTICIPATED. LESS
RAIN IS EXPECTED TO THE SOUTH OF INTERSTATE 80 AND THE FLASH FLOOD
THREAT IS LOW.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

SCATTERED THUNDERSTORMS ARE EXPECTED TUESDAY NIGHT THROUGH WEDNESDAY
NIGHT. THE OVERALL SEVERE WEATHER THREAT APPEARS TO BE LOW AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED LATE THIS AFTERNOON...THROUGH
THE OVERNIGHT HOURS.

In the hours before

Local storm report, Jun 7, 10:09 PM CDT, 2 hours 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1009 PM CDT SUN JUN 07 2009

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

0654 PM     TSTM WND GST     GRIMES                  41.66N 93.79W
06/07/2009  M61 MPH          POLK               IA   MESONET

&&

MS MUN 09

Local storm report, Jun 7, 10:10 PM CDT, 2 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
1010 PM CDT SUN JUN 07 2009

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

0517 PM     TORNADO          3 WSW ANITA             41.43N 94.82W
06/07/2009                   CASS               IA   TRAINED SPOTTER

            BRIEF ROPE TORNADO...NO DAMAGE REPORTED.

0542 PM     HAIL             ADAIR                   41.50N 94.64W
06/07/2009  E1.00 INCH       ADAIR              IA   LAW ENFORCEMENT

0543 PM     HAIL             3 N ADAIR               41.54N 94.64W
06/07/2009  E1.00 INCH       GUTHRIE            IA   TRAINED SPOTTER

0600 PM     HAIL             3 S GUTHRIE CENTER      41.64N 94.50W
06/07/2009  E1.00 INCH       GUTHRIE            IA   AMATEUR RADIO

            ON HIGHWAY 25 SOUTH OF GUTHRIE CENTER

0601 PM     HAIL             6 SSE GUTHRIE CENTER    41.60N 94.46W
06/07/2009  E0.88 INCH       GUTHRIE            IA   TRAINED SPOTTER

0623 PM     TSTM WND GST     ADEL                    41.61N 94.03W
06/07/2009  E70.00 MPH       DALLAS             IA   EMERGENCY MNGR

            TREE DAMAGE IN ADEL WITH ESTIMATED 60-80 MPH WINDS

0623 PM     TORNADO          3 S DALLAS CENTER       41.64N 93.98W
06/07/2009                   DALLAS             IA   TRAINED SPOTTER

            REPORTED AS RAIN WRAPPED BY A SPOTTER

0627 PM     TSTM WND DMG     ADEL                    41.61N 94.03W
06/07/2009                   DALLAS             IA   AMATEUR RADIO

            AMATEUR RADIO OPERATOR REPORTED TREE DAMAGE IN ADEL WITH
            UP TO 10 INCH DIAMETER BRANCHES DOWN.

0634 PM     HAIL             2 N ADEL                41.64N 94.03W
06/07/2009  E0.88 INCH       DALLAS             IA   LAW ENFORCEMENT

0640 PM     TSTM WND DMG     4 S DALLAS CENTER       41.63N 93.98W
06/07/2009                   DALLAS             IA   BROADCAST MEDIA

            THREE TO FOUR INCH DIAMETER TREE BRANCHES DOWN. FROM KCCI
            TV CHASE VEHICLE.

0650 PM     TSTM WND DMG     JOHNSTON                41.69N 93.70W
06/07/2009                   POLK               IA   LAW ENFORCEMENT

            TRAILER BLOWN ACROSS PARKING LOT

0650 PM     TSTM WND DMG     GRIMES                  41.66N 93.79W
06/07/2009                   POLK               IA   LAW ENFORCEMENT

            TREES DOWN INCLUDING A 2 FOOT DIAMETER TREE ONTO A HOUSE

0652 PM     TSTM WND DMG     1 E GRIMES              41.66N 93.77W
06/07/2009                   POLK               IA   AMATEUR RADIO

            AMATEUR RADIO OPERATOR REPORTED ESTIMATED 60 MPH WIND
            GUST AT INTERSECTION OF HIGHWAY 141 AND HIGHWAY 44 JUST
            EAST OF GRIMES.

0654 PM     TSTM WND GST     GRIMES                  41.66N 93.79W
06/07/2009  M61.00 MPH       POLK               IA   MESONET

0655 PM     TORNADO          2 E GRIMES              41.66N 93.75W
06/07/2009                   POLK               IA   LAW ENFORCEMENT

            POSSIBLE TORNADO TRACK FROM NEAR GRIMES TO NEAR JOHNSTON.
            AREA OF TREE DAMAGE AND POWER LINES DOWN ALONG AN EAST TO
            WEST PATH IN THIS AREA.

0656 PM     TORNADO          3 NNE GRIMES            41.71N 93.77W
06/07/2009                   POLK               IA   STORM CHASER

            METEOROLOGIST REPORTED A TORNADO CROSSED HIGHWAY 141
            NORTH OF GRIMES

0657 PM     HAIL             4 NW JOHNSTON           41.73N 93.76W
06/07/2009  E1.00 INCH       POLK               IA   LAW ENFORCEMENT

            NEAR SAYLORVILLE DAM

0704 PM     TSTM WND GST     3 S POLK CITY           41.74N 93.72W
06/07/2009  E60.00 MPH       POLK               IA   TRAINED SPOTTER

0709 PM     FUNNEL CLOUD     3 SE POLK CITY          41.74N 93.68W
06/07/2009                   POLK               IA   LAW ENFORCEMENT

0713 PM     TSTM WND DMG     2 NE GRIMES             41.68N 93.76W
06/07/2009                   POLK               IA   LAW ENFORCEMENT

            LARGE TREES OVER 6600 BLOCK OF NW 100TH ST IN JOHNSTON.
            PUBLIC REPORT VIA POLK COUNTY DISPATCH.

0720 PM     TSTM WND GST     2 NNW ANKENY AIRPORT    41.72N 93.58W
06/07/2009  E65.00 MPH       POLK               IA   TRAINED SPOTTER

0830 PM     TSTM WND DMG     2 NNW MONTOUR           42.01N 92.73W
06/07/2009                   TAMA               IA   LAW ENFORCEMENT

            SEMI BLOWN OFF HIGHWAY 30 DUE TO SEVERE WIND.

0843 PM     HEAVY RAIN       3 SE MARSHALLTOWN AIRPO 42.08N 92.88W
06/07/2009  M2.25 INCH       MARSHALL           IA   TRAINED SPOTTER

            TRAINED SPOTTER REPORTS 2.25 INCHES OF RAIN IN 15
            MINUTES.

&&

JJOHNSON

Local storm report, Jun 7, 10:20 PM CDT, 2 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1020 PM CDT SUN JUN 07 2009

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

1015 PM     HAIL             NE BLOOMFIELD           40.75N 92.41W
06/07/2009  E1.75 INCH       DAVIS              IA   PUBLIC

&&

ZOGG

Local storm report, Jun 7, 10:28 PM CDT, 2 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1028 PM CDT SUN JUN 07 2009

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

1023 PM     HAIL             5 S FLORIS              40.80N 92.33W
06/07/2009  E1.75 INCH       DAVIS              IA   TRAINED SPOTTER

&&

BF

Local storm report, Jun 7, 10:33 PM CDT, 2 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1033 PM CDT SUN JUN 07 2009

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

1032 PM     HAIL             4 ESE FLORIS            40.84N 92.27W
06/07/2009  E1.50 INCH       DAVIS              IA   TRAINED SPOTTER

&&

BF

Local storm report, Jun 8, 12:20 AM CDT, 18 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 7, 7:06 PM CDT	Tornado Warning	DMX	Polk	24 min
Jun 7, 7:08 PM CDT	Severe Thunderstorm Warning	DMX	Polk	37 min
Jun 7, 8:24 PM CDT	Severe Thunderstorm Warning	DMX	Tama	51 min
Jun 7, 8:40 PM CDT	Areal Flood Advisory	DMX	Black Hawk, Grundy, Marshall, Tama	2 hr
Jun 7, 8:58 PM CDT	River Flood Warning	DMX	Lucas, Wayne	33 hr
Jun 7, 9:55 PM CDT	Severe Thunderstorm Warning	DMX	Davis	50 min
Jun 7, 11:22 PM CDT	Flash Flood Warning	DMX	Adams, Taylor	6 hr
Jun 7, 11:56 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold	38 min
Jun 8, 12:02 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass	43 min
Jun 8, 12:19 AM CDT	Areal Flood Advisory	DMX	Ringgold, Union	5 hr
Jun 8, 2:46 PM CDT	River Flood Warning	DMX	Mahaska, Marion	28 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.