Alert archive / Iowa / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 478, NWS Des Moines, IA

July 28, 2008Appanoose County, Davis County, Wayne County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 28, 2008, 12:26 AM CDT for Appanoose County, Davis County, Wayne County, Iowa. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 28, 2008, 12:26 AM CDT (05:26 UTC)
Expired: Jul 28, 2008, 12:53 AM CDT
In force: 27 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon

Counties Appanoose County, IA, Davis County, IA, Wayne County, IA

The radar

The Des Moines radar (KDMX), 132 km from the middle of the area, began a volume at 05:26 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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
Jul 27, 11:30 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 5.4 hours before the alert went out and 219 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: 566 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 1193 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KDMX 280526
SVRDMX
IAC007-051-185-280615-
/O.NEW.KDMX.SV.W.0478.080728T0526Z-080728T0615Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1226 AM CDT MON JUL 28 2008

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  APPANOOSE COUNTY IN SOUTH CENTRAL IOWA...
  SOUTHEASTERN WAYNE COUNTY IN SOUTH CENTRAL IOWA...
  WESTERN DAVIS COUNTY IN SOUTHEAST IOWA...

* UNTIL 115 AM CDT.

* AT 1222 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  MYSTIC...OR 29 MILES NORTHWEST OF LANCASTER...AND MOVING SOUTH AT
  25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MYSTIC AND PLANO BY 1230 AM CDT...
  CENTERVILLE AND NUMA BY 1240 AM CDT...
  CINCINNATI AND EXLINE BY 1250 AM CDT...

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 4083 9320 4090 9256 4090 9254 4059 9249
      4058 9272 4058 9316
TIME...MOT...LOC 0526Z 349DEG 22KT 4079 9293

$$

DONAVON

2 follow-up statements

000 
WWUS53 KDMX 280547
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1247 AM CDT MON JUL 28 2008

IAC185-280557-
/O.CAN.KDMX.SV.W.0478.000000T0000Z-080728T0615Z/
WAYNE IA-
1247 AM CDT MON JUL 28 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WAYNE COUNTY IS
CANCELLED...

AT 1245 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE 
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
AREA...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY. 
THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 AM CDT MONDAY
MORNING FOR EASTERN IOWA.

LAT...LON 4058 9309 4070 9307 4075 9264 4059 9256
      4059 9264 4058 9264 4058 9269
TIME...MOT...LOC 0547Z 331DEG 40KT 4060 9280

$$

IAC007-051-280615-
/O.CON.KDMX.SV.W.0478.000000T0000Z-080728T0615Z/
APPANOOSE IA-DAVIS IA-
1247 AM CDT MON JUL 28 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT
FOR SOUTHWESTERN DAVIS AND SOUTHERN APPANOOSE COUNTIES...

AT 1245 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR EXLINE...OR 17 MILES NORTHWEST OF LANCASTER...MOVING
SOUTHEAST AT 46 MPH.

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL...DAMAGING WINDS AND DEADLY CLOUD TO GROUND LIGHTNING. 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 4058 9309 4070 9307 4075 9264 4059 9256
      4059 9264 4058 9264 4058 9269
TIME...MOT...LOC 0547Z 331DEG 40KT 4060 9280

$$

DONAVON

000 
WWUS53 KDMX 280553
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1253 AM CDT MON JUL 28 2008

IAC007-051-280603-
/O.CAN.KDMX.SV.W.0478.000000T0000Z-080728T0615Z/
APPANOOSE IA-DAVIS IA-
1253 AM CDT MON JUL 28 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN DAVIS AND
SOUTHERN APPANOOSE COUNTIES IS CANCELLED...

AT 1250 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE 
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
AREA...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY. 
THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

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 4058 9309 4070 9307 4075 9264 4059 9256
      4059 9264 4058 9264 4058 9269
TIME...MOT...LOC 0553Z 331DEG 40KT 4054 9276

$$

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, 8 hours 58 minutes earlier.

Area forecast discussion, Jul 27, 3:28 PM CDT, 8 hours 58 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, 11:10 PM CDT, 1 hour 16 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
1110 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-
1110 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 OVERNIGHT.
THE MAIN THREATS WILL BE DAMAGING STRAIGHT LINE WINDS TO 60
MPH...AND HAIL TO BASEBALL SIZE. AN ISOLATED TORNADO IS NOT OUT OF
THE QUESTION. 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 OVERNIGHT.

IAZ004>007-015>017-281100-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
1110 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.

KINNEY/REV

In the hours before

Local storm report, Jul 27, 11:37 PM CDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1137 PM CDT SUN JUL 27 2008

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

1136 PM     HAIL             BOONE                   42.05N 93.88W
07/27/2008  E1.25 INCH       BOONE              IA   LAW ENFORCEMENT

&&

BF

Local storm report, Jul 27, 11:47 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1147 PM CDT SUN JUL 27 2008

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

1115 PM     HAIL             BOXHOLM                 42.17N 94.11W
07/27/2008  E1.75 INCH       BOONE              IA   PUBLIC

            PUBLIC REPORTED GOLF BALL SIZED HAIL IN BOXHOLM AT
            APPROXIMATELY 1115 PM. DELAYED REPORT.

&&

LEE

Local storm report, Jul 27, 11:56 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1156 PM CDT SUN JUL 27 2008

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

1130 PM     HAIL             FRASER                  42.13N 93.97W
07/27/2008  E2.75 INCH       BOONE              IA   PUBLIC

            PUBLIC REPORTS BASEBALL SIZE HAIL IN FRASER AT 1130 PM.
            DELAYED REPORT.

&&

LEE

Local storm report, Jul 28, 12:08 AM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1208 AM CDT MON JUL 28 2008

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

1155 PM     FLOOD            ALLEMAN                 41.82N 93.61W
07/27/2008                   POLK               IA   BROADCAST MEDIA

            WATER AXLE DEEP IN ALLEMAN ESTATES ON THE SOUTH SIDE OF
            ALLEMAN. FROM WHO TV.

&&

SMALL

Local storm report, Jul 28, 12:19 AM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1219 AM CDT MON JUL 28 2008

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

1133 PM     HAIL             KNOXVILLE               41.32N 93.10W
07/27/2008  E2.50 INCH       MARION             IA   BROADCAST MEDIA

            NEAR KNOXVILLE HIGH SCHOOL...FROM KCCI TV VIEWER

&&

SMALL

Local storm report, Jul 28, 12:25 AM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1225 AM CDT MON JUL 28 2008

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

1220 AM     FLASH FLOOD      ALBIA                   41.03N 92.80W
07/28/2008                   MONROE             IA   LAW ENFORCEMENT

            FLASH FLOODING REPORTED AT THE INTERSECTION OF HIGHWAY 5
            AND HIGHWAY 137.

&&

MS JUL 08

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, 10:37 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Polk, Story	38 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, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.