Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 91, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 24, 2012, 4:30 PM CDT for Bremer County, Iowa. It was in force for 19 min. 1 report 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 24, 2012, 4:30 PM CDT (21:30 UTC)
- Expired
- May 24, 2012, 4:49 PM CDT
- In force
- 19 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Bremer County, IA
The radar
The La Crosse radar (KARX), 148 km from the middle of the area, began a volume at 21:32 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 | Remark |
|---|---|---|---|
| May 24, 4:44 PM CDT | TSTM WND DMG | Sumner, IA | NUMEROUS LARGE TREES DOWNED FROM STRONG WINDS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 24, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.5 hours before the alert went out and 193 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
- 1568 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
751 WUUS53 KDMX 242130 SVRDMX IAC017-242215- /O.NEW.KDMX.SV.W.0091.120524T2130Z-120524T2215Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 430 PM CDT THU MAY 24 2012 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BREMER COUNTY IN NORTHEAST IOWA... * UNTIL 515 PM CDT * AT 425 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR DENVER...OR 14 MILES NORTH OF WATERLOO...AND MOVING NORTHEAST AT 55 MPH. A SECOND SEVERE STORM WAS LOCATED NEAR WAVERLY MOVING NORTHEAST AT 55 MPH. * LOCATIONS IMPACTED INCLUDE... TRIPOLI...SUMNER AND FREDERIKA. PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE FOR DAMAGING WINDS...FALLING TREES AND FLYING DEBRIS. MOVE INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE IN A MOBILE HOME... SEEK SHELTER IN A REINFORCED BUILDING. && LAT...LON 4265 9209 4264 9255 4291 9255 4291 9208 TIME...MOT...LOC 2130Z 211DEG 47KT 4274 9223 WIND...HAIL 60MPH 1.00IN $$ BEERENDS
2 follow-up statements
925 WWUS53 KDMX 242143 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 443 PM CDT THU MAY 24 2012 IAC017-242215- /O.CON.KDMX.SV.W.0091.000000T0000Z-120524T2215Z/ BREMER IA- 443 PM CDT THU MAY 24 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN BREMER COUNTY UNTIL 515 PM CDT... AT 439 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SUMNER...OR 17 MILES SOUTHEAST OF NEW HAMPTON...MOVING NORTHEAST AT 55 MPH. A SECOND SEVERE STORM WAS LOCATED SOUTHWEST OF FREDERIKA AND MOVING NORTHEAST AT 50 MPH. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF EXTREME NORTHEASTERN BREMER COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE FOR LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A REINFORCED BUILDING AND AWAY FROM WINDOWS. PREPARE FOR DAMAGING WINDS...FALLING TREES AND FLYING DEBRIS. MOVE INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE IN A MOBILE HOME...GET OUT NOW...AND SEEK SHELTER IN A REINFORCED BUILDING. && LAT...LON 4275 9209 4275 9254 4291 9249 4291 9208 TIME...MOT...LOC 2143Z 211DEG 47KT 4289 9211 WIND...HAIL 60MPH 1.00IN $$ BEERENDS
530 WWUS53 KDMX 242149 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 449 PM CDT THU MAY 24 2012 IAC017-242159- /O.CAN.KDMX.SV.W.0091.000000T0000Z-120524T2215Z/ BREMER IA- 449 PM CDT THU MAY 24 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BREMER COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM. IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT. LAT...LON 4275 9209 4275 9254 4291 9249 4291 9208 TIME...MOT...LOC 2149Z 211DEG 47KT 4296 9205 $$ BEERENDS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 7:26 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Sac | 49 min |
| May 23, 8:15 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Crawford, Sac | 45 min |
| May 23, 8:51 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas | 39 min |
| May 24, 3:30 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin, Hardin | 45 min |
| May 24, 3:56 PM CDT | Severe Thunderstorm Warning | DMX | Bremer, Butler, Grundy | 49 min |
| May 24, 4:26 PM CDT | Severe Thunderstorm Warning | DMX | Decatur, Wayne | 49 min |
| May 24, 4:55 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy, Tama | 50 min |
| May 24, 5:51 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Marion, Poweshiek | 39 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2012Every severe thunderstorm warning in 2012
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.