Alert archive / Iowa / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 467, NWS Des Moines, IA

July 27, 20084 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 27, 2008, 10:37 PM CDT for 4 counties in Iowa. It was in force for 38 min. 3 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: Jul 27, 2008, 10:37 PM CDT (03:37 UTC)
Expired: Jul 27, 2008, 11:15 PM CDT
In force: 38 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon

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

The radar

The Des Moines radar (KDMX), 31 km from the middle of the area, began a volume at 03:39 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.

What was reported inside it

Time	Report	Where
Jul 27, 10:56 PM CDT	HAIL 1	Boone, IA
Jul 27, 10:58 PM CDT	HAIL 2.75	Boone, IA
Jul 27, 11:03 PM CDT	HAIL 1.75	1 S Luther, IA

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 3 storm reports to this severe thunderstorm warning; the first came 19 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 nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 3.6 hours before the alert went out and 224 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: 4160 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1137 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 253 m²/s²
Significant tornado parameter: 4.0
Supercell composite: 26.2

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KDMX 280337
SVRDMX
IAC015-049-153-169-280415-
/O.NEW.KDMX.SV.W.0467.080728T0337Z-080728T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1037 PM CDT SUN JUL 27 2008

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

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

* UNTIL 1115 PM CDT.

* AT 1035 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR FRASER...OR 32 MILES SOUTH OF FORT DODGE...
  AND MOVING SOUTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BOONE AND BOONE AIRPORT BY 1045 PM CDT...
  LUTHER BY 1055 PM CDT...
  MADRID BY 1105 PM CDT...
  KELLEY BY 1110 PM CDT...
  SLATER...SHELDAHL AND HUXLEY BY 1115 PM CDT...

THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING PREVIOUSLY IN 
EFFECT FOR THIS AREA.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 103 AND 112.

MOVE TO AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS. IF YOU LIVE IN A
MOBILE HOME...SEEK SHELTER IN A STURDY BUILDING.

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.

LAT...LON 4178 9385 4209 9412 4221 9388 4221 9384
      4190 9343
TIME...MOT...LOC 0337Z 312DEG 26KT 4207 9395

$$

DONAVON

2 follow-up statements

000 
WWUS53 KDMX 280357
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1058 PM CDT SUN JUL 27 2008

IAC015-049-153-169-280415-
/O.CON.KDMX.SV.W.0467.000000T0000Z-080728T0415Z/
BOONE IA-STORY IA-POLK IA-DALLAS IA-
1058 PM CDT SUN JUL 27 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR NORTHEASTERN DALLAS...NORTHWESTERN POLK...SOUTHWESTERN STORY AND
SOUTHEASTERN BOONE COUNTIES...

AT 1053 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING
HAIL UP TO GOLF BALL SIZE.  THIS STORM WAS LOCATED NEAR LUTHER...OR
31 MILES NORTH OF DES MOINES...MOVING SOUTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MADRID BY 1105 PM CDT...
  KELLEY BY 1110 PM CDT...
  SLATER...SHELDAHL...HUXLEY AND 8 MILES WEST OF CAMBRIDGE BY 1115 PM
  CDT...

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 103 AND 107.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR LARGE DESTRUCTIVE HAIL CAPABLE OF PRODUCING
SIGNIFICANT DAMAGE. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

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.

LAT...LON 4178 9385 4203 9403 4207 9386 4207 9373
      4189 9349
TIME...MOT...LOC 0358Z 312DEG 26KT 4197 9380

$$

DONAVON

000 
WWUS53 KDMX 280406
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1106 PM CDT SUN JUL 27 2008

IAC015-049-153-169-280415-
/O.CON.KDMX.SV.W.0467.000000T0000Z-080728T0415Z/
BOONE IA-STORY IA-POLK IA-DALLAS IA-
1106 PM CDT SUN JUL 27 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR NORTHEASTERN DALLAS...NORTHWESTERN POLK...SOUTHWESTERN STORY AND
SOUTHEASTERN BOONE COUNTIES...

AT 1102 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE 
THUNDERSTORM PRODUCING BASEBALL SIZE HAIL...AND DAMAGING WINDS IN 
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR LUTHER...OR 27 MILES 
NORTH OF DES MOINES...MOVING SOUTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SHELDAHL...SLATER...HUXLEY AND 9 MILES WEST OF CAMBRIDGE BY 1115 PM
  CDT...

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 103 AND 107.

AT 1100 PM CDT...AN OFF DUTY NATIONAL WEATHER SERVICE EMPLOYEE 
REPORTED BASEBALL SIZED HAIL FALLING A MILE SOUTH OF BOONE.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR LARGE DESTRUCTIVE HAIL CAPABLE OF PRODUCING
SIGNIFICANT DAMAGE. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

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.

LAT...LON 4178 9385 4203 9403 4207 9386 4207 9373
      4189 9349
TIME...MOT...LOC 0406Z 312DEG 26KT 4192 9377

$$

DONAVON

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 Jul 27, 3:28 PM CDT, 7 hours 9 minutes earlier.

Area forecast discussion, Jul 27, 3:28 PM CDT, 7 hours 9 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
328 PM CDT SUN JUL 27 2008

.DISCUSSION...
WILL KEEP DISCUSSION BRIEF TODAY WITH ONGOING ACTIVE WEATHER. STRONG
TO SEVERE STORMS CURRENTLY FIRING ALONG CONVECTIVE OUTFLOW IN
NORTHERN IOWA AND WILL KEEP PROGRESSING SOUTHWARD INTO CENTRAL AND
SOUTHERN IOWA THROUGH LATE AFTERNOON/EVENING. SEVERE THUNDERSTORM
WATCH CONTINUES FOR MOST OF THE CWA UNTIL 10 PM. ALREADY GETTING
SIGNIFICANT STRAIGHT LINE WIND REPORTS...CAN/T RULE OUT ISOLATED TOR
THREAT INVOF BOUNDARY FOR THE NEXT SEVERAL HOURS. SOME QUESTION
ABOUT CONVECTIVE EVOLUTION BEYOND THE FIRST SHOT...AS THE GFS/ECMWF
BOTH SUGGESTING ADDITIONAL MCS POTENTIAL ESPECIALLY EASTERN HALF
LATE TONIGHT. WILL HAVE TO WATCH HEAVY RAIN THREAT CLOSELY AS
CONVECTION MOVES INTO SOUTHERN IOWA...AREAS THAT CANNOT TAKE MUCH
ADDITIONAL RAIN BEFORE FLASH FLOODING OCCURS. NO FLASH FLOOD WATCH
PLANNED AT THIS TIME WITH UNCERTAINTY ABOUT AMOUNTS/LOCATION...BUT
MAY HAVE TO ISSUE LATER ONCE EVENT SHOWS ITS HAND.

BEYOND THE OVERNIGHT...SIGNIFICANT HEAVY RAIN/SVR WEATHER AGAIN
EXPECTED MONDAY NIGHT INTO TUESDAY AS DOLLY MOISTURE REMNANTS BEGIN
TO IMPACT THE REGION. ACTIVE WEATHER LIKELY TO CONTINUE LATE
WEDNESDAY INTO THURSDAY WITH NEXT SHORT WAVE TOPPING THE RIDGE
FOLLOWED BY UPPER RIDGING AND MAINLY DRY AND HOT WEATHER FROM FRIDAY
THROUGH SUNDAY.

&&

.AVIATION...27/18Z
CURRENT CONVECTIVE COMPLEX OVER NRN IA WILL CONTINUE MOVING ESE
EARLY THIS AFTERNOON. THE FORECAST BEYOND THE NEXT FEW HOURS IS
STILL UNCERTAIN AS FAR AS EXACTLY WHERE ADDITIONAL STORMS WILL
DEVELOP. THUNDERSTORMS MAY DEVELOP DURING PEAK HEATING ALONG AND
SOUTH OF HWY 30...AND/OR REDEVELOP ACROSS NRN IA OVERNIGHT...OR
BOTH. THIS UNCERTAINTY IN TIMING...AS WELL AS LOCATION...HAS LEAD TO
NO MENTION OF THUNDER BEYOND DEALING WITH STORMS THAT ARE ONGOING.
HAVE INCLUDED CB WORDING AFTER 00Z WITH FURTHER DETAILS ADDED ONCE
TIMING AND LOCATION BECOMES MORE CLEAR RATHER THAN ADDING THUNDER
FOR PROLONGED PERIODS WITH LOW CONFIDENCE.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...SEVERE THUNDERSTORM WATCH IN
EFFECT UNTIL 10 PM FOR ENTIRE CWA EXCEPT NORTHERN 2 TIERS OF
COUNTIES.

&&

AVIATION...MOYER
PUBLIC...KINNEY

Hazardous weather outlook, Jul 27, 4:25 PM CDT, 6 hours 12 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
425 PM CDT SUN JUL 27 2008

IAZ023>028-033>039-044>050-057>062-070>075-081>086-092>097-281100-
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-
425 PM CDT SUN JUL 27 2008

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

.DAY ONE...TONIGHT

SCATTERED TO WIDESPREAD THUNDERSTORMS WILL CONTINUE THIS EVENING
AND OVERNIGHT. THE MAIN THREATS WILL BE DAMAGING STRAIGHT LINE
WINDS TO 90 MPH...AND QUARTER SIZE HAIL. AN ISOLATED TORNADO IS
NOT OUT OF THE QUESTION THROUGH EARLY EVENING. LOCALLY HEAVY
RAINFALL COULD LEAD TO FLASH FLOODING...ESPECIALLY OVER SOUTHERN
IOWA...WHERE HEAVY RAIN FELL RECENTLY.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THERE ARE VARIABLE CHANCES FOR THUNDERSTORMS THROUGHOUT MANY OF
THE NEXT 7 DAYS. AT THIS TIME THE GREATER CHANCES FOR
THUNDERSTORMS LOOK TO BE LATE MONDAY NIGHT...AND AGAIN TUESDAY.
CURRENTLY THE AREA IS IN A SLIGHT RISK FOR SEVERE WEATHER AGAIN
MONDAY NIGHT....WITH THE CHANCES FOR SEVERE WEATHER UNCERTAIN AT
THIS TIME FOR THE REMAINDER OF THE WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING AND OVERNIGHT.

IAZ004>007-015>017-281100-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
425 PM CDT SUN JUL 27 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN IOWA.

.DAY ONE...TONIGHT

SCATTERED THUNDERSTORMS ARE POSSIBLE WITH AN ISOLATED SEVERE STORM
NOT OUT OF THE QUESTION. THE MAIN THREAT WOULD BE STRAIGHT LINE
WINDS TO 60 MPH AND QUARTER SIZE HAIL.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THERE ARE VARIABLE CHANCES FOR THUNDERSTORMS THROUGHOUT MANY OF
THE NEXT 7 DAYS. AT THIS TIME THE GREATER CHANCES FOR
THUNDERSTORMS LOOK TO BE LATE MONDAY NIGHT...AND AGAIN TUESDAY.
CURRENTLY THE AREA IS IN A SLIGHT RISK FOR SEVERE WEATHER AGAIN
MONDAY NIGHT....WITH THE CHANCES FOR SEVERE WEATHER UNCERTAIN AT
THIS TIME FOR THE REMAINDER OF THE WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED ON AN ISOLATED BASIS TONIGHT.

ALBRECHT/KINNEY

In the hours before

Local storm report, Jul 27, 9:31 PM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
931 PM CDT SUN JUL 27 2008

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

0800 PM     HAIL             2 SW MELROSE            40.96N 93.08W
07/27/2008  E1.75 INCH       MONROE             IA   PUBLIC

&&

RUSSELL

Local storm report, Jul 27, 9:39 PM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
939 PM CDT SUN JUL 27 2008

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

0853 PM     HAIL             5 SE RUSSELL            40.93N 93.13W
07/27/2008  E1.00 INCH       LUCAS              IA   PUBLIC

            QUARTER SIZED HAIL REPORTED. THIRD STORM THAT HAILED AT
            LOCATION THIS EVENING WITH PREVIOUS STORMS DROPPING
            NICKEL SIZED HAIL OR LESS.

&&

RUSSELL

Local storm report, Jul 27, 9:51 PM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
951 PM CDT SUN JUL 27 2008

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

0616 PM     HAIL             5 W MILLERTON           40.84N 93.40W
07/27/2008  E0.88 INCH       WAYNE              IA   TRAINED SPOTTER

            NICKEL HAIL IN THE TOWN OF CAMBRIA

&&

PODRAZIK

Local storm report, Jul 27, 9:56 PM CDT, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
956 PM CDT SUN JUL 27 2008

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

0616 PM     TSTM WND DMG     5 W MILLERTON           40.84N 93.40W
07/27/2008                   WAYNE              IA   TRAINED SPOTTER

            SEVERAL 8 INCH DIAMETER TREES DOWN IN THE TOWN OF
            CAMBRIA.

0645 PM     HEAVY RAIN       5 W MILLERTON           40.84N 93.40W
07/27/2008  M2.80 INCH       WAYNE              IA   TRAINED SPOTTER

            2.8 INCHES OF RAIN IN ABOUT 25 MINUTES.

&&

PODRAZIK

Local storm report, Jul 27, 10:19 PM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1019 PM CDT SUN JUL 27 2008

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

1017 PM     HAIL             SLATER                  41.88N 93.68W
07/27/2008  E0.88 INCH       STORY              IA   FIRE DEPT/RESCUE

            SLATER FIRE DEPARTMENT REPORTS NICKEL SIZED HAIL FALLING
            IN SLATER.

&&

LEE

Local storm report, Jul 27, 10:35 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1035 PM CDT SUN JUL 27 2008

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

1031 PM     HAIL             6 N ANKENY              41.81N 93.60W
07/27/2008  E1.75 INCH       POLK               IA   PUBLIC

            PUBLIC REPORTED HAIL UP TO GOLF BALL SIZE IN ALLEMAN.

1032 PM     HAIL             ALLEMAN                 41.82N 93.61W
07/27/2008  E1.00 INCH       POLK               IA   LAW ENFORCEMENT

            LAW ENFORCEMENT REPORTS NICKEL TO QUARTER HAIL FALLING IN
            ALLEMAN.

&&

LEE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 7:28 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Monroe, Wapello	47 min
Jul 27, 7:40 PM CDT	Flash Flood Warning	DMX	Appanoose, Davis, Monroe, Wapello	8 hr
Jul 27, 7:47 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Lucas, Monroe, Wayne	10 min
Jul 27, 7:54 PM CDT	Tornado Warning	DMX	Appanoose, Lucas, Monroe	36 min
Jul 27, 8:00 PM CDT	River Flood Warning	DMX	Mahaska	38 hr
Jul 27, 8:27 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	33 min
Jul 27, 8:29 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Lucas, Marion, Monroe, Wayne	46 min
Jul 27, 8:46 PM CDT	River Flood Warning	DMX	Appanoose	44 hr
Jul 27, 8:46 PM CDT	River Flood Warning	DMX	Appanoose, Wayne	44 hr
Jul 27, 9:14 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose	31 min
Jul 27, 10:04 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Hamilton, Story, Webster	41 min
Jul 27, 10:06 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Jasper, Polk, Story	39 min
Jul 27, 10:39 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Polk, Warren	51 min
Jul 27, 10:56 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Marion, Monroe	49 min
Jul 27, 11:05 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Webster	40 min
Jul 27, 11:12 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Jasper, Polk, Story	48 min
Jul 27, 11:15 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Monroe, Wapello	45 min
Jul 27, 11:20 PM CDT	Flash Flood Warning	DMX	Dallas, Jasper, Mahaska, Marion, Polk, Warren	4 hr
Jul 27, 11:28 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Mahaska, Marion, Monroe, Warren	47 min
Jul 27, 11:39 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Polk, Story	37 min
Jul 27, 11:45 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Polk, Warren	30 min
Jul 27, 11:54 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Lucas, Marion, Monroe	36 min
Jul 27, 11:59 PM CDT	Flash Flood Warning	DMX	Boone, Greene, Story	117 min
Jul 28, 12:24 AM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas	38 min
Jul 28, 12:26 AM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Wayne	27 min
Jul 28, 1:06 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	39 min
Jul 28, 1:18 AM CDT	Flash Flood Warning	DMX	Adair, Appanoose, Audubon, Carroll, Clarke, Dallas and 10 more	6 hr
Jul 28, 1:46 AM CDT	Tornado Warning	DMX	Adair, Madison	29 min
Jul 28, 2:15 AM CDT	Severe Thunderstorm Warning	DMX	Clarke, Madison, Union	45 min
Jul 28, 2:23 AM CDT	River Flood Warning	DMX	Polk	26 hr
Jul 28, 2:35 AM CDT	River Flood Warning	DMX	Mahaska, Marion	53 hr
Jul 28, 3:03 AM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur	23 min
Jul 28, 4:49 AM CDT	Tornado Warning	DMX	Carroll, Crawford	41 min
Jul 28, 5:31 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Crawford	44 min
Jul 28, 6:03 AM CDT	Severe Thunderstorm Warning	DMX	Crawford, Sac	42 min
Jul 28, 6:11 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Crawford	49 min
Jul 28, 6:45 AM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford	45 min
Jul 28, 6:47 AM CDT	River Flood Warning	DMX	Warren	30 hr
Jul 28, 7:13 AM CDT	Areal Flood Warning	DMX	Adair, Appanoose, Clarke, Dallas, Davis, Decatur and 8 more	12 hr
Jul 28, 9:27 AM CDT	River Flood Warning	DMX	Decatur	14 hr
Jul 28, 9:38 AM CDT	River Flood Warning	DMX	Polk	43 hr
Jul 28, 9:38 AM CDT	River Flood Warning	DMX	Dallas, Polk	29 hr
Jul 28, 9:38 AM CDT	River Flood Warning	DMX	Polk	48 hr
Jul 28, 9:38 AM CDT	River Flood Warning	DMX	Polk	48 hr
Jul 28, 9:38 AM CDT	River Flood Warning	DMX	Madison, Warren	4 days
Jul 28, 9:38 AM CDT	River Flood Warning	DMX	Dallas, Guthrie	19 hr
Jul 28, 1:07 PM CDT	River Flood Warning	DMX	Madison, Warren	35 hr

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; radar from the NEXRAD Level II archive.