Alert archive / Iowa / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 78, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 25, 2010, 2:52 PM CDT for 4 counties in Iowa. It was in force for 23 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
- May 25, 2010, 2:52 PM CDT (19:52 UTC)
- Expired
- May 25, 2010, 3:15 PM CDT
- In force
- 23 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Audubon County, IA, Carroll County, IA, Greene County, IA, Guthrie County, IA
The radar
The Des Moines radar (KDMX), 80 km from the middle of the area, began a volume at 19:55 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 nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 7.9 hours before the alert went out and 154 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
- 14 J/kg
- Mixed-layer CIN
- -360 J/kg
- Mixed-layer LCL
- 1300 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -47 m²/s²
- 0-3 km storm-relative helicity
- -46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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, 12:58 PM CDT, 1 hour 54 minutes earlier.
Area forecast discussion, May 25, 12:58 PM CDT, 1 hour 54 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DES MOINES IA 1258 PM CDT TUE MAY 25 2010 ...UPDATED AVIATION DISCUSSION... SHORT TERM /TODAY/... MESSY STTN TDA WITH UNSEASONABLY STRONG UPR LO LIFTING RAPIDLY NWD THRU THE WRN DKTS AND OVERALL DYNAMIC PTRN WEAKENING ACRS IA TDA. STRONG OUTFLOW BNDRY HAS PUSHED INTO THE NWRN PART OF THE CWA WITH WLY WINDS 20-35 KTS. EXPECT THAT TO WEAKEN BFR MAKING MUCH MORE PROGRESS INTO THE STATE AND WITH LACK OF ANY REAL SUPPORT DO NOT EXPECT TO SEE IT FIRE OFF ANYTHING MORE THAN ISOLD ACTIVITY. FRONTAL MVMT TDA WILL BE BLOCKED BY BOTH FLOW BEING PARALLEL TO BNDRY AND WWD PUSH OF WEAK ELY WAVE FM SYS OFF THE ERN U.S. THIS MRNG. CAP VIRTUALLY NON-EXISTENT TDA AND THOUGH THERE SHOULDN'T BE A LOT OF DVLPMT THIS MRNG...ALSO FEEL THAT MAX TEMPS WILL LKLY OCCUR BY MID DAY WITH ENUF DESTABILIZATION TAKING PLACE TO PRODUCE NMRS TSRA FOR THE AFTN. SVR THREAT MINIMAL WITH SHEAR ONLY 5-10 KTS AND ANYTHING THAT WOULD WILL BE PULSE TYPE ACTIVITY. UPSHOT IS NOT MUCH CHNG TO GOING POPS OTHER THAN TWEAKING THE PCPN TIMING AND CUTTING MOS HIGHS FOR THE MOST PART. LONG TERM /TONIGHT THROUGH MONDAY/... A WEAKENING COLD FRONT ACROSS NORTHWESTERN IOWA AT THE BEGINNING OF THE TONIGHT PERIOD WILL DROP SOUTHEASTWARD ACROSS OUR CWA THROUGH WEDNESDAY MORNING. ALTHOUGH A WEAK MID/UPPER SHORTWAVE MAY MOVE OVERHEAD TONIGHT OVERALL FORCING AND WIND SHEAR WILL BE VERY WEAK THROUGH THIS TIME...HOWEVER INSTABILITY WILL REMAIN HIGH AND DESPITE THE WEAK SURFACE CONVERGENCE ALONG THE BOUNDARY AT LEAST SCATTERED SHOWERS/THUNDERSTORMS ARE PROBABLE UNTIL AFTER THE LOW-LEVEL BOUNDARY CLEARS OUR SOUTHEASTERN CORNER WEDNESDAY NIGHT. HAVE MAINTAINED LIKELY POPS TONIGHT AND INCREASED TO LIKELIES IN THE SOUTHEAST WEDNESDAY MORNING...BUT HAVE NOT INCREASED QPFS MUCH DUE TO THE EXPECTED RELATIVE LACK OF ORGANIZED CONVECTION. ONCE THIS SYSTEM CLEARS OUR AREA A SURFACE RIDGE WILL BUILD IN BEHIND THE FRONT BY THURSDAY...AND RIDGING ALOFT WILL STRENGTHEN SIGNIFICANTLY FROM THURSDAY NIGHT THROUGH SATURDAY PROVIDING DRY AND QUIET CONDITIONS ACROSS THE CWA. ANOTHER SYSTEM APPEARS ON TAP TO APPROACH THE AREA TOWARD THE LATTER HALF OF THE WEEKEND BUT THERE ARE STILL LARGE UNCERTAINTIES REGARDING THE TIMING AND EVOLUTION OF THAT SYSTEM. && .AVIATION... 25/18Z...MORNING CONVECTION HAD MOSTLY DISSIPATED BY TAF ISSUANCE. SOME THUNDER PERSISTED NEAR KOTM...AND HAVE THEREFORE LEFT IN CB. ELSEWHERE...ISOLATED RA AND TSRA MAY DEVELOP IN THE AFTERNOON...BUT VISIBILITIES AND CEILINGS WILL REMAIN VFR. NEXT CONCERN WILL BE APPROACHING COLD FRONT WHICH WILL PUSH EASTWARD OVERNIGHT...BRINGING SHRA TO ALL SITES AFTER 00Z...WHICH WILL LAST THROUGH 12Z. SOME SITES COULD DROP MVFR...ESPECIALLY KDSM AND KALO TOWARDS THE END OF THE PERIOD. BUT TIMING AND CEILING HEIGHTS WILL NEED TO BE REEVALUATED WITH LATER UPDATES && .DMX WATCHES/WARNINGS/ADVISORIES...NONE. && SHORT TERM...MS MAY 10 LONG TERM...LEE AVIATION...WILKINS
Hazardous weather outlook, May 25, 12:19 PM CDT, 2 hours 33 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 1219 PM CDT TUE MAY 25 2010 IAZ004>007-015>017-023>026-033>036-044>047-057>059-070-071-081-092- 261730- EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-SAC-CALHOUN-WEBSTER-HAMILTON- CRAWFORD-CARROLL-GREENE-BOONE-AUDUBON-GUTHRIE-DALLAS-CASS-ADAIR- ADAMS-TAYLOR- 1219 PM CDT TUE MAY 25 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS WILL DEVELOP THIS AFTERNOON...BECOMING LIKELY BY THIS EVENING...AND CONTINUING THROUGH TONIGHT. LOCALLY HEAVY RAINFALL IS EXPECTED. SOME STORMS MAY PRODUCE LOCALLY STRONG WINDS IN EXCESS OF 50 MPH...ALONG WITH HAIL AS LARGE AS 1 INCH IN DIAMETER...OR SLIGHTLY LARGER. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY CHANCES FOR NON SEVERE THUNDERSTORMS WILL PERSIST THROUGH WEDNESDAY. THERE IS ALSO A SLIGHT CHANCE OF THUNDERSTORMS FOR SUNDAY AND SUNDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED BEGINNING LATER THIS AFTERNOON. IAZ027-028-037-038-048-049-060-072-073-082-083-093-094-261730- BUTLER-BREMER-HARDIN-GRUNDY-STORY-MARSHALL-POLK-MADISON-WARREN-UNION- CLARKE-RINGGOLD-DECATUR- 1219 PM CDT TUE MAY 25 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS WILL DEVELOP THIS AFTERNOON...BECOMING LIKELY BY THIS EVENING...AND CONTINUING THROUGH TONIGHT. LOCALLY HEAVY RAINFALL IS EXPECTED WITH LOCALIZED FLOODING POSSIBLE...ESPECIALLY IN URBAN AND POORLY DRAINED AREAS. SOME STORMS MAY PRODUCE LOCALLY STRONG WINDS IN EXCESS OF 50 MPH...ALONG WITH HAIL AS LARGE AS 1 INCH IN DIAMETER OR SLIGHTLY LARGER. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THUNDERSTORMS WILL REMAIN LIKELY THROUGH WEDNESDAY...WITH CHANCES TAPERING OFF TOWARD THE SOUTHEAST WEDNESDAY NIGHT AND THURSDAY. THERE IS ALSO A SLIGHT CHANCE OF THUNDERSTORMS FOR SUNDAY AND SUNDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED BEGINNING LATER THIS AFTERNOON. IAZ039-050-061-062-074-075-084>086-095>097-261730- BLACK HAWK-TAMA-JASPER-POWESHIEK-MARION-MAHASKA-LUCAS-MONROE-WAPELLO- WAYNE-APPANOOSE-DAVIS- 1219 PM CDT TUE MAY 25 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS WILL DEVELOP THIS AFTERNOON...BECOMING LIKELY BY THIS EVENING...AND CONTINUING THROUGH TONIGHT. IF HEAVY RAINS DO OCCUR...THEN LOCALIZED FLOODING IS EXPECTED ESPECIALLY IN AREAS WHICH EXPERIENCED HEAVY RAINFALL EARLIER TODAY. FLASH FLOODING IS POSSIBLE...ESPECIALLY IN URBAN AND POORLY DRAINED AREAS. SOME STORMS MAY PRODUCE LOCALLY STRONG WINDS IN EXCESS OF 50 MPH...ALONG WITH HAIL AS LARGE AS 1 INCH IN DIAMETER OR SLIGHTLY LARGER. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THUNDERSTORMS WILL REMAIN LIKELY THROUGH WEDNESDAY...WITH CHANCES TAPERING OFF TOWARD THE SOUTHEAST WEDNESDAY NIGHT AND THURSDAY. THERE IS ALSO A SLIGHT CHANCE OF THUNDERSTORMS FOR SUNDAY AND SUNDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. ZOGG
In the hours before
Special weather statement, May 25, 10:28 AM CDT, 4 hours 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1028 AM CDT TUE MAY 25 2010 IAZ061-062-074-075-251630- JASPER-MAHASKA-MARION-POWESHIEK- 1028 AM CDT TUE MAY 25 2010 AT 1025 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM SOUTH CENTRAL JASPER COUNTY TO NORTHWESTERN MAHASKA COUNTY...MOVING NORTH AT 20 MPH. WINDS GREATER THAN 40 MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING... BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE STORMS. GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED. WILKINS
Special weather statement, May 25, 11:13 AM CDT, 3 hours 39 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1113 AM CDT TUE MAY 25 2010 IAZ086-251715- WAPELLO- 1113 AM CDT TUE MAY 25 2010 AT 1111 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR OTTUMWA...MOVING NORTHEAST AT 15 MPH. ONE HALF INCH DIAMETER HAIL...OCCASIONAL CLOUD TO GROUND LIGHTNING... BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. WILKINS
Special weather statement, May 25, 12:00 PM CDT, 2 hours 52 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1200 PM CDT TUE MAY 25 2010 IAZ075-086-251800- MAHASKA-WAPELLO- 1200 PM CDT TUE MAY 25 2010 ...STRONG THUNDERSTORM WILL MOVE NORTH JUST EAST OF OTTUMWA THROUGH 1230 PM... AT 1152 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 7 MILES SOUTHEAST OF OTTUMWA...MOVING NORTH AT 15 MPH. PENNY SIZE HAIL...WINDS UP TO 50 MPH...HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... AGENCY GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. LOCALLY HEAVY RAIN WILL LIKELY CAUSE URBAN AND SMALL STREAM FLOOD. AN URBAN AND SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT FOR WAPELLO COUNTY UNTIL 230 PM. JOHNSON
Special weather statement, May 25, 2:41 PM CDT, 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 241 PM CDT TUE MAY 25 2010 IAZ034-035-046-047-058-059-071-072-082-083-252145- CALHOUN-WEBSTER-GREENE-BOONE-GUTHRIE-DALLAS-ADAIR-MADISON-UNION- CLARKE- INCLUDING THE CITIES OF...ROCKWELL CITY...FORT DODGE... JEFFERSON...BOONE...GUTHRIE CENTER...ADEL...GREENFIELD... WINTERSET...CRESTON...OSCEOLA 241 PM CDT TUE MAY 25 2010 ...SCATTERED THUNDERSTORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS ACROSS WEST CENTRAL IOWA... AT 235 PM... SCATTERED THUNDERSTORMS WERE DEVELOPING OVER WEST CENTRAL IOWA BETWEEN CARROLL AND CRESTON. SCATTERED THUNDERSTORMS SHOULD CONTINUE TO DEVELOP AND MOVE NORTH AT 10 TO 20 MPH FROM JUST WEST OF FORT DODGE SOUTH INTO SOUTHWEST IOWA THROUGH 400 PM. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING STRONG WIND GUSTS TO NEAR 50 MPH...SMALL HAIL AND BRIEF HEAVY RAIN.
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 11:37 AM CDT | Areal Flood Advisory | DMX | Wapello | 119 min |
| May 25, 3:19 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Cass, Guthrie | 41 min |
| May 25, 3:33 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene, Guthrie | 42 min |
| May 25, 3:44 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Guthrie | 46 min |
| May 25, 4:19 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Greene, Guthrie | 38 min |
| May 25, 4:46 PM CDT | Flash Flood Warning | DMX | Adair | 3 hr |
| May 25, 5:14 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Union | 42 min |
| May 25, 5:34 PM CDT | Flash Flood Warning | DMX | Union | 4 hr |
Nearby
Severe Thunderstorm Warnings in Iowa, 2010Every severe thunderstorm warning in 2010
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.