Alert archive / Iowa / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 84, NWS Des Moines, IA

May 25, 20085 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 25, 2008, 9:59 PM CDT for 5 counties in Iowa. It was in force for 46 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 25, 2008, 9:59 PM CDT (02:59 UTC)
Expired: May 25, 2008, 10:45 PM CDT
In force: 46 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon

Counties Boone County, IA, Dallas County, IA, Jasper County, IA, Polk County, IA, Story County, IA

What was reported inside it

Time	Report	Where	Remark
May 25, 10:04 PM CDT	TSTM WND DMG	4 S Berkley, IA	POWER LINES DOWN AT 319TH AND CLOVER BOONE, COUNTY.
May 25, 10:18 PM CDT	TSTM WND GST 60	Ankeny, IA	4 INCH DIAMETER TREE LIMBS DOWNED

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 5 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
May 25, 7:54 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 3.0 hours before the alert went out and 233 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: 14 J/kg
Mixed-layer CIN: -247 J/kg
Mixed-layer LCL: 2817 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 215 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KDMX 260259
SVRDMX
IAC015-049-099-153-169-260345-
/O.NEW.KDMX.SV.W.0084.080526T0259Z-080526T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
959 PM CDT SUN MAY 25 2008

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BOONE COUNTY IN CENTRAL IOWA...
  NORTHEASTERN DALLAS COUNTY IN CENTRAL IOWA...
  NORTHWESTERN JASPER COUNTY IN CENTRAL IOWA...
  NORTHERN POLK COUNTY IN CENTRAL IOWA...
  SOUTHWESTERN STORY COUNTY IN CENTRAL IOWA...

* UNTIL 1045 PM CDT.

* AT 958 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS
  IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM BERKLEY TO WEST DES MOINES...OR ALONG A LINE
  EXTENDING FROM 33 MILES NORTHWEST OF DES MOINES TO DES MOINES...AND
  MOVING NORTHEAST AT 54 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  GRIMES...URBANDALE...WOODWARD AND GRANGER BY 1000 PM CDT...
  POLK CITY...MADRID AND JOHNSTON BY 1005 PM CDT...
  SHELDAHL...ANKENY AIRPORT AND LUTHER BY 1010 PM CDT...

GO TO A BASEMENT OR SMALL INTERIOR ROOM. EXTENSIVE DAMAGE IS LIKELY.
EVACUATE MOBILE HOMES...AND SEEK SHELTER IN A STURDY BUILDING. SEVERE
STRAIGHT LINE WINDS CAN SOUND LIKE A TORNADO...AND PRODUCE SIMILAR
DAMAGE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT MONDAY MORNING FOR
IOWA.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO WARNING.
ALTHOUGH NOT IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY
AND MOVE TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A
BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 4183 9322 4167 9347 4170 9361 4151 9381
      4190 9417 4193 9417 4214 9352
TIME...MOT...LOC 0259Z 247DEG 47KT 4192 9404 4158 9371

$$

KINNEY

2 follow-up statements

000 
WWUS53 KDMX 260323
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1023 PM CDT SUN MAY 25 2008

IAC015-049-099-153-169-260345-
/O.CON.KDMX.SV.W.0084.000000T0000Z-080526T0345Z/
BOONE IA-STORY IA-JASPER IA-POLK IA-DALLAS IA-
1023 PM CDT SUN MAY 25 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT
FOR NORTHEASTERN DALLAS...NORTHERN POLK...NORTHWESTERN JASPER...
SOUTHWESTERN STORY AND SOUTHERN BOONE COUNTIES...

AT 1018 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM LUTHER TO ALLEMAN...OR ALONG
A LINE EXTENDING FROM 29 MILES NORTH OF DES MOINES TO 16 MILES NORTH
OF DES MOINES...MOVING NORTHEAST AT 54 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  MAXWELL BY 1030 PM CDT...
  NEVADA AND COLLINS BY 1035 PM CDT...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT MONDAY MORNING FOR
IOWA.

LAT...LON 4183 9322 4167 9347 4170 9361 4162 9380
      4196 9408 4214 9352
TIME...MOT...LOC 0323Z 241DEG 47KT 4202 9367 4183 9349

$$

KINNEY

000 
WWUS53 KDMX 260343
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1044 PM CDT SUN MAY 25 2008

IAC015-049-099-153-169-260354-
/O.EXP.KDMX.SV.W.0084.000000T0000Z-080526T0345Z/
BOONE IA-STORY IA-JASPER IA-POLK IA-DALLAS IA-
1044 PM CDT SUN MAY 25 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN DALLAS...NORTHERN
POLK...NORTHWESTERN JASPER...SOUTHWESTERN STORY AND SOUTHERN BOONE
COUNTIES WILL EXPIRE AT 1045 PM CDT...

AT 1040 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE AREA.
THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO
EXPIRE.

REPORT TORNADOES...WIND IN EXCESS OF 50 MPH...HAIL LARGER THAN ONE
HALF INCH...OR STORM DAMAGE BY CALLING LOCAL LAW ENFORCEMENT AND
ASKING THEM TO RELAY THE REPORT TO THE NATIONAL WEATHER SERVICE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT MONDAY MORNING FOR
IOWA.

LAT...LON 4183 9322 4167 9347 4170 9361 4162 9380
      4196 9408 4214 9352
TIME...MOT...LOC 0344Z 241DEG 47KT 4215 9335 4196 9317

$$

KINNEY

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 May 25, 8:03 PM CDT, 1 hour 56 minutes earlier.

Area forecast discussion, May 25, 8:03 PM CDT, 1 hour 56 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
803 PM CDT SUN MAY 25 2008

.DISCUSSION...
FOCUS IS ON DEVELOPING WEATHER. AMPLE MOISTURE IN PLACE AS 70
DEGREE DEW POINTS STREAMING INTO THE CWA. SC LOW IN MN WITH A WARM
FRONT EXTENDING DOWN FM WRN MN INTO ERN IA AND A COLD FRONT FM THE
DAKOTAS INTO ERN NEB WILL SINK SE THROUGH TONIGHT. THE FRONT WILL
SETTLE SOUTH OF IA LATE MONDAY MORNING. ALL MODES OF SEVERE
WEATHER POSSIBLE WITH 4000-5000 J/KG CAPE OVER THE CWA ALONG WITH
50+ KNOTS OF SHEAR. THE CAP IS VIRTUALLY GONE AS WELL AND WITH
THE SUN BREAKING OUT THERE WILL BE RAPID DESTABILIZATION ACROSS
THE CWA WITH STORMS EXPECTED TO RAPIDLY EVOLVE AND BECOME SEVERE.
THE SCENARIO HAS NOT CHANGED IN EVOLVING A COMPLEX OF STORMS OVER
SRN IA TONGIGHT WITH AN INCREASING HEAVY RAIN THREAT AFTER THE
SEVERE EVENT THIS EVENING. AS A RESULT THE FLASH FLOOD WATCH WILL
REMAIN IN PLACE.

THE ACTIVE WEATHER PATTERN CONTINUES AS FLOW BECOMES MORE ZONAL
AND SEVERAL SHORTWAVES PUSH ACROSS THE CWA. NEXT SYSTEM HAS
ALREADY BEEN ADVERTISED FOR THURSDAY NIGHT THROUGH FRIDAY NIGHT
THEN AGAIN MONDAY AND MONDAY NIGHT. AT THIS POINT SEVERE POTENTIAL
LOOKS DECENT FOR THE FRIDAY SYSTEM BUT THERE IS SOME QUESTION ON
TRACK AND TIMING FOR THE MONDAY SYSTEM MAKING IT DIFFICULT TO
DETERMINE ANY SEVERE POTENTIAL AT THIS POINT.

AS FOR TEMPS...A COOL DOWN IS EXPECTED IN THE WAKE OF THIS SYSTEM
WITH HIGHS DIPPING INTO THE 60S AND 70S BUT AS FLOW BECOMES
ZONAL...HIGHS SHOULD BE CLOSER TO NORMAL BY MIDWEEK.

&&

.AVIATION...26/00Z
MAIN CONCERN WILL BE WITH VERY UNSTABLE AMS IN PLACE.  KEPT MUCH OF
THE PCPN OVR THE SERN HLF OF THE TAFS AND GRADUALLY PULLED PCPN SWD
LATE TNGT INTO MON MRNG ACROSS THE SRN THIRD.  SVR WX LMTS TIME AVBL.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH FROM 7 PM CDT THIS EVENING THROUGH MONDAY
MORNING FOR ADAIR-ADAMS-APPANOOSE-AUDUBON-BOONE-CARROLL-CASS-
CLARKE-CRAWFORD-DALLAS-DAVIS-DECATUR-GREENE-GUTHRIE-JASPER-LUCAS-
MADISON-MAHASKA-MARION-MARSHALL-MONROE-POLK-POWESHIEK-RINGGOLD-
STORY-TAMA-TAYLOR-UNION-WAPELLO-WARREN-WAYNE.

&&

AVIATION...MS MAY 08
SHORT TERM/LONG TERM...FAB

Hazardous weather outlook, May 25, 8:31 AM CDT, 13 hours 28 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
831 AM CDT SUN MAY 25 2008

IAZ044>050-057>062-070>075-081>086-092>097-261345-
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-
831 AM CDT SUN MAY 25 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

A FEW ISOLATED NON SEVERE THUNDERSTORMS ARE POSSIBLE DURING THE
DAY. HOWEVER...MORE INTENSE STORMS ARE FORECAST TO DEVELOP LATE
THIS AFTERNOON ACROSS WESTERN IOWA. THESE STORMS MAY BE SEVERE
WITH LARGE HAIL AND DAMAGING WINDS. ISOLATED TORNADOES WILL ALSO
BE POSSIBLE DURING THE LATE AFTERNOON AND EVENING TIME FRAMES. THE
STORMS ARE FORECAST TO CONSOLIDATE OVERNIGHT WITH HEAVY RAINS
ACROSS PORTIONS OF CENTRAL IOWA. SEVERAL INCHES OF NEW RAIN ARE
POSSIBLE LEADING TO FLASH FLOODING. A FLASH FLOOD WATCH HAS BEEN
ISSUED FOR CENTRAL AND SOUTHERN IOWA TONIGHT. PLEASE REFER TO THE
NATIONAL WEATHER SERVICE DES MOINES WEBSITE FOR ADDITIONAL
DETAILS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

ADDITIONAL THREATS FOR THUNDERSTORMS WILL CONTINUE INTO MONDAY AND
EARLY TUESDAY AS WELL AS THURSDAY NIGHT INTO LATE FRIDAY. THE
THREAT FOR SEVERE WEATHER APPEARS LIMITED EARLY IN THE WEEK
ALTHOUGH THE POSSIBILITY OF HEAVY RAINS WILL PERSIST. SEVERE
WEATHER WILL BE POSSIBLE ON THURSDAY NIGHT INTO FRIDAY AS WELL.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY LATE THIS AFTERNOON INTO TONIGHT.
SPOTTER MAY ALSO BE NEEDED THURSDAY NIGHT INTO FRIDAY. AN
EMERGENCY MANAGEMENT CONFERENCE CALL HAS BEEN SCHEDULED FOR NOON TODAY.

IAZ004>007-015>017-023>028-033>039-261345-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN-
WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-
831 AM CDT SUN MAY 25 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

A FEW ISOLATED NON SEVERE THUNDERSTORMS ARE POSSIBLE DURING THE
DAY. HOWEVER...MORE INTENSE STORMS ARE FORECAST TO DEVELOP LATE
THIS AFTERNOON ACROSS WESTERN IOWA. THESE STORMS MAY BE SEVERE
WITH LARGE HAIL AND DAMAGING WINDS. ISOLATED TORNADOES WILL ALSO
BE POSSIBLE DURING THE LATE AFTERNOON AND EVENING TIME FRAMES.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THUNDERSTORMS ARE EXPECTED THURSDAY NIGHT INTO FRIDAY. SEVERE
WEATHER IS POSSIBLE WITH THESE STORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY LATE THIS AFTERNOON INTO TONIGHT.
SPOTTER MAY ALSO BE NEEDED THURSDAY NIGHT INTO FRIDAY. AN
EMERGENCY MANAGEMENT CONFERENCE CALL HAS BEEN SCHEDULED FOR NOON
TODAY.

In the hours before

Local storm report, May 25, 9:35 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
935 PM CDT SUN MAY 25 2008

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

0928 PM     HAIL             2 E CONRAD              42.22N 92.83W
05/25/2008  E0.88 INCH       GRUNDY             IA   AMATEUR RADIO

            NICKEL HAIL REPORTED BETWEEN CONRAD AND BEAMAN, IA.

&&

RK

Local storm report, May 25, 9:36 PM CDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
936 PM CDT SUN MAY 25 2008

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

0933 PM     TSTM WND GST     WINTERSET               41.34N 94.02W
05/25/2008  E70 MPH          MADISON            IA   LAW ENFORCEMENT

&&

BF

Local storm report, May 25, 9:38 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
938 PM CDT SUN MAY 25 2008

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

0926 PM     TSTM WND GST     7 NE GREENFIELD         41.38N 94.36W
05/25/2008  E67 MPH          ADAIR              IA   AMATEUR RADIO

            76 MPH WIND GUST REPORTED 7MI NE GREENFIELD, IA.

0926 PM     TSTM WND GST     7 NE GREENFIELD         41.38N 94.36W
05/25/2008  E67 MPH          ADAIR              IA   AMATEUR RADIO

            67 MPH WIND GUSTS REPORTED 7MI NE GREENFIELD, IA.

&&

RK

Local storm report, May 25, 9:40 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
940 PM CDT SUN MAY 25 2008

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

0923 PM     TSTM WND DMG     CONRAD                  42.22N 92.87W
05/25/2008                   GRUNDY             IA   AMATEUR RADIO

            18 INCH TREE SNAPPED IN CONRAD, IA DUE TO WIND GUSTS.

&&

RK

Local storm report, May 25, 9:43 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
943 PM CDT SUN MAY 25 2008

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

0940 PM     TSTM WND GST     WINTERSET               41.34N 94.02W
05/25/2008  E85 MPH          MADISON            IA   UNKNOWN

            WIND GUSTS OF 85 MPH REPORTED IN WINTERSET, IA.

&&

RK

Local storm report, May 25, 9:47 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
947 PM CDT SUN MAY 25 2008

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

0855 PM     LIGHTNING        ANKENY                  41.72N 93.61W
05/25/2008                   POLK               IA   LAW ENFORCEMENT

            LIGHTNING STRIKE AND CAUSES HOUSE FIRE IN ANKENY, IA.

&&

RK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 7:14 PM CDT	Severe Thunderstorm Warning	DMX	Bremer	46 min
May 25, 7:15 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Greene, Guthrie	45 min
May 25, 7:19 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	26 min
May 25, 7:38 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Story	52 min
May 25, 7:44 PM CDT	Tornado Warning	DMX	Guthrie	46 min
May 25, 7:50 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer	40 min
May 25, 7:57 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Hardin	63 min
May 25, 8:02 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas	43 min
May 25, 8:05 PM CDT	Severe Thunderstorm Warning	DMX	Polk	40 min
May 25, 8:11 PM CDT	Severe Thunderstorm Warning	DMX	Dallas	19 min
May 25, 8:16 PM CDT	Tornado Warning	DMX	Grundy, Hardin, Marshall, Story	44 min
May 25, 8:27 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Butler, Grundy	33 min
May 25, 8:29 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Taylor, Union	46 min
May 25, 8:44 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Taylor	46 min
May 25, 8:46 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Polk, Story	44 min
May 25, 8:54 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Jasper, Madison, Polk, Warren	51 min
May 25, 8:58 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Tama	47 min
May 25, 9:01 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Audubon, Cass, Guthrie	44 min
May 25, 9:09 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Clarke, Madison, Union, Warren	51 min
May 25, 9:21 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Madison, Polk	39 min
May 25, 9:25 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Greene, Guthrie, Polk	50 min
May 25, 9:29 PM CDT	Severe Thunderstorm Warning	DMX	Tama	46 min
May 25, 9:31 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Ringgold	44 min
May 25, 9:31 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Polk	44 min
May 25, 9:42 PM CDT	Severe Thunderstorm Warning	DMX	Polk, Warren	48 min
May 25, 10:03 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion	42 min
May 25, 10:12 PM CDT	Severe Thunderstorm Warning	DMX	Tama	48 min
May 25, 10:15 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Wayne	45 min
May 25, 10:20 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Hamilton, Hardin, Story, Webster	40 min
May 25, 10:21 PM CDT	Flash Flood Warning	DMX	Tama	113 min
May 25, 10:35 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Poweshiek	40 min
May 25, 10:43 PM CDT	Severe Thunderstorm Warning	DMX	Marshall, Story	36 min
May 25, 10:48 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	42 min
May 25, 10:52 PM CDT	Tornado Warning	DMX	Poweshiek	23 min
May 25, 11:00 PM CDT	Severe Thunderstorm Warning	DMX	Monroe, Wapello	45 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2008 Every severe thunderstorm warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.