Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 31, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 3, 2012, 8:37 PM CDT for Buena Vista County, Cherokee County, Iowa. It was in force for 38 min. 4 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
- May 3, 2012, 8:37 PM CDT (01:37 UTC)
- Expired
- May 3, 2012, 9:15 PM CDT
- In force
- 38 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 58.0 mph
Counties Buena Vista County, IA, Cherokee County, IA
The radar
The Sioux Falls radar (KFSD), 146 km from the middle of the area, began a volume at 01:40 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 3, 8:39 PM CDT | HAIL 1 | Aurelia, IA | |
| May 3, 8:43 PM CDT | HAIL 1 | Aurelia, IA | |
| May 3, 8:45 PM CDT | HAIL 1 | Aurelia, IA | |
| May 3, 8:55 PM CDT | HAIL 1.75 | Aurelia, IA | NICKEL TO GOLF BALL SIZE HAIL FELL FOR 17 MINUTES...ENDING AT 855 PM |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 1.6 hours before the alert went out and 176 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
- 2202 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 1397 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
493 WUUS53 KFSD 040137 SVRFSD IAC021-035-040215- /O.NEW.KFSD.SV.W.0031.120504T0137Z-120504T0215Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 837 PM CDT THU MAY 3 2012 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WEST CENTRAL BUENA VISTA COUNTY IN NORTHWEST IOWA... EAST CENTRAL CHEROKEE COUNTY IN NORTHWEST IOWA... * UNTIL 915 PM CDT * AT 837 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR AURELIA...OR 14 MILES NORTHWEST OF STORM LAKE...AND MOVING SOUTHEAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... AURELIA AROUND 845 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4272 9524 4259 9549 4273 9556 4285 9537 TIME...MOT...LOC 0137Z 331DEG 7KT 4273 9543 WIND...HAIL <58MPH 1.00IN $$ JM
2 follow-up statements
910 WWUS53 KFSD 040155 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 855 PM CDT THU MAY 3 2012 IAC021-035-040215- /O.CON.KFSD.SV.W.0031.000000T0000Z-120504T0215Z/ BUENA VISTA IA-CHEROKEE IA- 855 PM CDT THU MAY 3 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL CHEROKEE AND WEST CENTRAL BUENA VISTA COUNTIES UNTIL 915 PM CDT... AT 854 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR AURELIA...OR 11 MILES WEST OF STORM LAKE...MOVING SOUTHEAST AT 10 MPH. IN ADDITION...THERE HAVE BEEN SEVERAL REPORTS OF QUARTER SIZE HAIL IN AND AROUND AURELIA WITH THIS STORM. THIS SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL CHEROKEE AND WEST CENTRAL BUENA VISTA COUNTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS! && LAT...LON 4272 9524 4259 9549 4273 9556 4280 9538 TIME...MOT...LOC 0154Z 331DEG 7KT 4270 9541 WIND...HAIL 60MPH 1.00IN $$ JM
587 WWUS53 KFSD 040208 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 908 PM CDT THU MAY 3 2012 IAC021-035-040218- /O.EXP.KFSD.SV.W.0031.000000T0000Z-120504T0215Z/ BUENA VISTA IA-CHEROKEE IA- 908 PM CDT THU MAY 3 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CHEROKEE AND WEST CENTRAL BUENA VISTA COUNTIES WILL EXPIRE AT 915 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. LAT...LON 4272 9524 4259 9549 4273 9556 4280 9538 TIME...MOT...LOC 0208Z 331DEG 7KT 4268 9539 $$ JM
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 7:57 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 33 min |
| May 3, 8:05 PM CDT | Flash Flood Warning | FSD | Cherokee | 93 min |
| May 4, 3:00 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 30 min |
| May 4, 3:14 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 31 min |
| May 4, 3:18 PM CDT | Severe Thunderstorm Warning | FSD | O'Brien, Osceola, Sioux | 42 min |
| May 4, 3:20 PM CDT | Tornado Warning | FSD | O'Brien, Sioux | 25 min |
| May 4, 3:39 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 36 min |
| May 4, 3:43 PM CDT | Tornado Warning | FSD | O'Brien, Sioux | 32 min |
| May 4, 4:01 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien | 29 min |
| May 4, 4:06 PM CDT | Tornado Warning | FSD | Clay | 24 min |
| May 4, 4:09 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson, Osceola | 51 min |
| May 4, 4:12 PM CDT | Severe Thunderstorm Warning | FSD | Clay, O'Brien | 33 min |
| May 4, 4:25 PM CDT | Severe Thunderstorm Warning | FSD | Clay | 35 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.