Alert archive / Iowa / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 194, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 25, 2011, 5:44 AM CDT for Clarke County, Iowa. It was in force for 30 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
- Jun 25, 2011, 5:44 AM CDT (10:44 UTC)
- Expired
- Jun 25, 2011, 6:14 AM CDT
- In force
- 30 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Clarke County, IA
The radar
The Des Moines radar (KDMX), 84 km from the middle of the area, began a volume at 10:48 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 nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 10.7 hours before the alert went out and 226 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1910 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
770
WUUS53 KDMX 251044
SVRDMX
IAC039-251130-
/O.NEW.KDMX.SV.W.0194.110625T1044Z-110625T1130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
544 AM CDT SAT JUN 25 2011
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CLARKE COUNTY IN SOUTH CENTRAL IOWA...
* UNTIL 630 AM CDT
* AT 543 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED NEAR OSCEOLA...OR 27 MILES EAST OF CRESTON...AND
MOVING EAST AT 10 MPH.
* LOCATIONS IMPACTED INCLUDE...
OSCEOLA...OSCEOLA AIRPORT AND WOODBURN.
THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 26 AND 41.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
LARGE HAIL CAN CAUSE INJURY AND PROPERTY DAMAGE. SEEK SAFETY INDOORS
UNTIL THE STORM PASSES.
&&
LAT...LON 4090 9380 4110 9397 4116 9355 4089 9356
4090 9360
TIME...MOT...LOC 1045Z 265DEG 10KT 4102 9383
WIND...HAIL <50MPH 1.00IN
$$2 follow-up statements
207
WWUS53 KDMX 251106
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
606 AM CDT SAT JUN 25 2011
IAC039-251130-
/O.CON.KDMX.SV.W.0194.000000T0000Z-110625T1130Z/
CLARKE IA-
606 AM CDT SAT JUN 25 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN CLARKE
COUNTY UNTIL 630 AM CDT...
AT 601 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED NEAR OSCEOLA...OR 26 MILES SOUTHWEST OF
INDIANOLA...MOVING EAST AT 10 MPH.
LOCATIONS IMPACTED INCLUDE...
OSCEOLA AIRPORT AND WOODBURN.
THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 32 AND 40.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE FOR LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE
OUTSIDE SHOULD MOVE TO A REINFORCED BUILDING AND AWAY FROM WINDOWS.
&&
LAT...LON 4090 9366 4099 9378 4111 9387 4116 9356
4090 9356
TIME...MOT...LOC 1106Z 265DEG 10KT 4102 9375
WIND...HAIL <50MPH 1.00IN
$$931
WWUS53 KDMX 251114
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
614 AM CDT SAT JUN 25 2011
IAC039-251124-
/O.CAN.KDMX.SV.W.0194.000000T0000Z-110625T1130Z/
CLARKE IA-
614 AM CDT SAT JUN 25 2011
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CLARKE COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED. TORRENTIAL
RAINFALL IS STILL LIKELY WITH THE STORMS.
LAT...LON 4090 9366 4099 9378 4111 9387 4116 9356
4090 9356
TIME...MOT...LOC 1114Z 265DEG 10KT 4103 9372
$$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 25, 3:48 AM CDT, 1 hour 56 minutes earlier.
Area forecast discussion, Jun 25, 3:48 AM CDT, 1 hour 56 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DES MOINES IA 348 AM CDT SAT JUN 25 2011 .SHORT TERM /TODAY/... DOUBLE MCS/S MOVING THRU SD AND NEB ARE SHIFTING SWD THIS MRNG AS COMPLEX OVR SRN NEBRASKA TAKES OVER ON THE NOSE OF THE LLJ AND MOISTURE INFLOW. EXPECT TO SEE THIS CONTINUE TO DEVELOP EWD ALONG THE SHEAR AXIS PRESENT FROM SRN NEBRASKA INTO NRN MO AS LLJ VEERS TWD SNRS. STRONGEST STORMS LIKELY TO REMAIN SOUTH OF THE CWA...BUT EXPECT TO SEE A LARGE AREA OF MOD TO OCNLY HEAVY RAFL THIS MRNG OVR THE SWWN THIRD TO HALF OF THE CWA. WILL CONT THE MNTN OF LOCALLY +RA FOR THIS AREA AS WELL. TSRA WILL WEAKEN LATER THIS MRNG AND AFFECT MAINLY THE SERN ZNS. WOULD SEE SCT DVLPT ABOUT ANYWHERE THIS AFTN...BUT NOT LOOKING FOR AN ORGANIZED SYSTEM. TEMPS ARE TRICKY WITH THE CLOUDS AND RAIN. LOWERED MAX TEMPS...ESPECIALLY ACRS THE SOUTH...DUE TO CLOUDS AND LIKELIHOOD THAT MOST OF THE DAY WILL HAVE AT LAST SCT-BKN AREA OF TSRA OVR IT. .LONG TERM /TONIGHT THROUGH FRIDAY/... BEGINNING OF PERIOD VERY TRICKY WITH LIKELY DEVELOPMENT OF YET ANOTHER MCS ACROSS CENTRAL NE...WITH TRACK EASTWARD DIFFICULT TO DETERMINE. COULD SEE MCS INTO CENTRAL IOWA BEFORE PULLING SOUTH. HOWEVER...FEEL MOST LIKELY SCENARIO WILL SEE MCS TRACK NEAR LLJ WHICH WILL BE FURTHER SOUTH INTO KS/MO. HAVE INCLUDED CHANCE POPS THROUGHOUT OVERNIGHT...WITH LIKELY ALONG SOUTH. WITH ADDITIONAL MOISTURE IN OVERNIGHT...WILL LIKELY SEE FOG ACROSS THE REGION...WITH DENSE FOG POSSIBLE IN SPOTS. LATE SUNDAY A FRONT ASSOCIATED WITH LOW PRESSURE IN SOUTHERN KS WILL LIFT NORTHWARD ACROSS IOWA. THIS WILL LIKELY BE FOCUS FOR STORM DEVELOPMENT. COULD SEE SOME STRONG TO SEVERE STORMS OVERNIGHT...WITH STRONG SHEAR AND CAPES OVER 1000 J/KG...HOWEVER APPEARS MOST LIKELY THREAT WILL BE HEAVY RAIN. SYSTEM WILL PULL AWAY BY LATE MONDAY. COULD AGAIN SEE POTENTIAL FOR STRONG STORMS LATE MONDAY...HOWEVER...MODELS ARE BECOMING MORE PROGRESSIVE WITH FRONT...TRYING TO SWEEP IT CLEAR OF IOWA WITH SEVERE POTENTIAL FOCUSED ALONG BOUNDARY. WILL HAVE TO KEEP A CLOSE EYE ON THIS SYSTEM. HIGH PRESSURE WILL THEN BUILD IN BENEATH UPPER LEVEL RIDGE FOR MOST OF REMAINDER OF THE PERIOD. ANOTHER QUICK SHOT FOR SOME PRECIPITATION WEDNESDAY WITH APPROACHING WAA. AS RIDGE BUILD...THIS WILL LEAD TO HOT AND MUGGY CONDITIONS FOR THE WEEKEND WITH H850 TEMPS APPROACHING 30 BY END OF WEEK. && .AVIATION...25/06Z THUNDERSTORM COMPLEX OVER SD AND NEBRASKA SHOULD MOVE INTO CNTRL IA LATE TONIGHT. IN ADDITION TO REDUCED VSBYS WITH PRECIPITATION...LOCALIZED MVFR CIGS ARE ALSO POSSIBLE. THUNDERSTORM CHANCES WILL CONTINUE INTO THE AFTERNOON ON SATURDAY. CIGS ARE EXPECTED TO LOWER THROUGH THE AFTERNOON WITH WIDESPREAD MVFR CONDITIONS BY LATE AFTERNOON. THE THUNDERSTORMS SHOULD END TOWARD EARLY EVENING. THOUGH LIGHT PRECIPITATION AND SOME FOG LIKELY WILL DEVELOP AFTER 00Z. && .HYDROLOGY... POTENTIAL FOR HEAVY RAINFALL IS A CONCERN OVER THE NEXT FEW DAYS. INITIAL COMPLEX TODAY MAY BRING LOCALLY HEAVY RAFL TO THE SRN AND SWRN PART OF THE STATE. FFG VALUES HAVE INCREASED OVR THE SOUTH THIS WEEK WITH MOST AREAS IN THE 1.5 INCH RANGE FOR 1 HR AND AROUND 2 INCHES OR MORE FOR 3 HOUR SUGGEST POTENTIAL FOR FLASH FLOODING IS LOW...BUR RISES IN AREAS STREAMS IS QUITE LKLY. HIGH PWAT VALUES...APPROACHING 2 INCHES ALNG THE MO BORDER NEED TO BE MONITORED. NEXT ROUND ON MON LOOKS LIKE IT WILL BE OVR THE NERN ZONES...WHERE FLASH FLOODING POTENTIAL IS LOWER. AGAIN...MAINSTEM STREAM RISES ARE LKLY BUT FF POT IS NOT ALL THAT GREAT. && .DMX WATCHES/WARNINGS/ADVISORIES...NONE. && SHORT TERM/HYDROLOGY...MS JUN 11 LONG TERM...WILKINS AVIATION...DONAVON
Hazardous weather outlook, Jun 25, 4:51 AM CDT, 53 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 451 AM CDT SAT JUN 25 2011 IAZ006-007-016-017-023-025>028-033-034-037>039-044>046-048>050- 261100- WINNEBAGO-WORTH-HANCOCK-CERRO GORDO-POCAHONTAS-WRIGHT-FRANKLIN- BUTLER-BREMER-SAC-CALHOUN-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD-CARROLL- GREENE-STORY-MARSHALL-TAMA- 451 AM CDT SAT JUN 25 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE POSSIBLE THROUGHOUT THE DAY SATURDAY AND INTO TONIGHT. STORMS ARE NOT EXPECTED TO BE SEVERE .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE WILL BE INTERMITTENT CHANCES FOR THUNDERSTORMS FROM SATURDAY THROUGH MONDAY. SEVERE WEATHER MAY BE POSSIBLE AT TIMES...PARTICULARLY SUNDAY NIGHT AND MONDAY. LOCALLY HEAVY RAIN IS POSSIBLE ON SATURDAY WITH ISOLATED ONE TO TWO INCH RAINFALL AMOUNTS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED FROM TIME TO TIME. IAZ004-005-015-024-035-036-047-261100- EMMET-KOSSUTH-PALO ALTO-HUMBOLDT-WEBSTER-HAMILTON-BOONE- 451 AM CDT SAT JUN 25 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE POSSIBLE THROUGHOUT THE DAY SATURDAY AND INTO TONIGHT. STORMS ARE NOT EXPECTED TO BE SEVERE. RIVER FLOOD WARNINGS ARE IN EFFECT FOR PARTS OF THE UPPER DES MOINES RIVER BASIN. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE WILL BE INTERMITTENT CHANCES FOR THUNDERSTORMS FROM SATURDAY THROUGH MONDAY. SEVERE WEATHER MAY BE POSSIBLE AT TIMES...PARTICULARLY SUNDAY NIGHT AND MONDAY. LOCALLY HEAVY RAIN IS POSSIBLE ON SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED FROM TIME TO TIME. IAZ057>062-070>075-081>086-092>097-261100- AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON- WARREN-MARION-MAHASKA-ADAMS-UNION-CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR- RINGGOLD-DECATUR-WAYNE-APPANOOSE-DAVIS- 451 AM CDT SAT JUN 25 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE LIKELY THROUGHOUT THE DAY SATURDAY AND INTO TONIGHT. STORMS MAY BE SEVERE...ESPECIALLY IN THE MORNING...WITH LARGE HAIL AND DAMAGING WINDS THE MAIN THREAT. IN ADDITION...STORMS COULD PRODUCE LOCALLY HEAVY RAINFALL WHICH COULD LEAD TO LOCALIZED FLASH FLOODING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE WILL BE INTERMITTENT CHANCES FOR THUNDERSTORMS FROM SATURDAY THROUGH MONDAY. SEVERE WEATHER MAY BE POSSIBLE AT TIMES...PARTICULARLY SUNDAY NIGHT AND MONDAY. LOCALLY HEAVY RAIN IS POSSIBLE ON SATURDAY WITH ISOLATED ONE TO TWO INCH RAINFALL AMOUNTS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY AND AGAIN FROM TIME TO TIME THROUGH THE WEEKEND. AW
In the hours before
Special weather statement, Jun 25, 4:05 AM CDT, 1 hour 39 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 405 AM CDT SAT JUN 25 2011 IAZ070>072-081>083-251000- ADAIR-ADAMS-CASS-CLARKE-MADISON-UNION- 405 AM CDT SAT JUN 25 2011 ...THUNDERSTORMS DEVELOPING IN SOUTHWEST IOWA... AT 402 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A RAPIDLY DEVELOPING THUNDERSTORM 38 MILES WEST OF CRESTON...DEVELOPING EASTWARD AT AROUND 55 MPH. PENNY SIZE HAIL...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE STORMS. LOCATIONS IMPACTED INCLUDE... CUMBERLAND... MASSENA... CARBON... BRIDGEWATER... PRESCOTT... ORIENT... CROMWELL... CRESTON AIRPORT... CRESTON... MACKSBURG... AFTON... THAYER... LORIMOR... SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.
Special weather statement, Jun 25, 5:01 AM CDT, 43 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 501 AM CDT SAT JUN 25 2011 IAZ070>072-081>083-093>095-251100- ADAIR-ADAMS-CASS-CLARKE-DECATUR-MADISON-RINGGOLD-UNION-WAYNE- 501 AM CDT SAT JUN 25 2011 ...THUNDERSTORMS EXPANDING OVER SOUTHWEST AND SOUTH CENTRAL IOWA... AT 457 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 26 MILES NORTHWEST OF CRESTON TO 9 MILES SOUTHEAST OF LAMONI...MOVING NORTHEAST AT 15 MPH. NICKEL SIZE HAIL...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE STORMS. LOCATIONS IMPACTED INCLUDE... ELLSTON... DAVIS CITY... BEACONSFIELD... CRESTON AIRPORT... CRESTON... BRIDGEWATER... ARISPE... GRAND RIVER... DECATUR CITY... AFTON... LEON... FONTANELLE... ORIENT... LINEVILLE... WELDON... SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED.
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 25, 5:07 AM CDT | Severe Thunderstorm Warning | DMX | Adams, Union | 38 min |
| Jun 25, 5:51 AM CDT | Flash Flood Warning | DMX | Adams, Cass, Union | 6 hr |
| Jun 25, 7:23 AM CDT | Flash Flood Warning | DMX | Clarke | 6 hr |
| Jun 25, 9:11 AM CDT | Flash Flood Warning | DMX | Appanoose, Wayne | 4 hr |
| Jun 25, 11:30 AM CDT | River Flood Warning | DMX | Decatur | 21 hr |
| Jun 25, 11:30 AM CDT | River Flood Warning | DMX | Appanoose, Wayne | 29 hr |
Nearby
Severe Thunderstorm Warnings in Iowa, 2011Every severe thunderstorm warning in 2011
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.