Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 42, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 4, 2012, 4:01 PM CDT for Cherokee County, O'Brien County, Iowa. It was in force for 29 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 4, 2012, 4:01 PM CDT (21:01 UTC)
- Expired
- May 4, 2012, 4:30 PM CDT
- In force
- 29 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Cherokee County, IA, O'Brien County, IA
The radar
The Sioux Falls radar (KFSD), 118 km from the middle of the area, began a volume at 21:02 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 4, 4:05 PM CDT | TSTM WND DMG | 3 N Cleghorn, IA | WIND DAMAGE NORTH OF CLEGHORN. |
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 4, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 9.0 hours before the alert went out and 192 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
- 2705 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 584 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
414 WUUS53 KFSD 042101 SVRFSD IAC035-141-042130- /O.NEW.KFSD.SV.W.0042.120504T2101Z-120504T2130Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 401 PM CDT FRI MAY 4 2012 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN CHEROKEE COUNTY IN NORTHWEST IOWA... SOUTHERN O'BRIEN COUNTY IN NORTHWEST IOWA... * UNTIL 430 PM CDT * AT 402 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR PAULLINA...OR 18 MILES EAST OF ORANGE CITY...AND MOVING EAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... LARRABEE AROUND 415 PM CDT... SUTHERLAND AROUND 420 PM CDT... OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE CALUMET. 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 4303 9539 4281 9539 4285 9585 4300 9581 TIME...MOT...LOC 2102Z 275DEG 24KT 4293 9566 WIND...HAIL 60MPH 1.25IN $$ SCHUMACHER
2 follow-up statements
836 WWUS53 KFSD 042122 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 422 PM CDT FRI MAY 4 2012 IAC035-141-042130- /O.CON.KFSD.SV.W.0042.000000T0000Z-120504T2130Z/ O'BRIEN IA-CHEROKEE IA- 422 PM CDT FRI MAY 4 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN CHEROKEE AND SOUTHERN O'BRIEN COUNTIES UNTIL 430 PM CDT... AT 421 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SUTHERLAND...OR 25 MILES SOUTHWEST OF SPENCER...MOVING EAST AT 30 MPH. IN ADDITION...AT 405 PM CDT WIND DAMAGE WAS REPORTED BY LAW ENFORCEMENT NORTH OF CLEGHORN. THIS SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTHERN CHEROKEE AND SOUTHERN O'BRIEN COUNTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4303 9539 4281 9539 4285 9585 4300 9581 TIME...MOT...LOC 2121Z 275DEG 24KT 4292 9549 WIND...HAIL 60MPH 1.00IN $$ SCHUMACHER
945 WWUS53 KFSD 042128 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 428 PM CDT FRI MAY 4 2012 IAC035-141-042138- /O.EXP.KFSD.SV.W.0042.000000T0000Z-120504T2130Z/ O'BRIEN IA-CHEROKEE IA- 428 PM CDT FRI MAY 4 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CHEROKEE AND SOUTHERN O'BRIEN COUNTIES WILL EXPIRE AT 430 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4303 9539 4281 9539 4285 9585 4300 9581 TIME...MOT...LOC 2128Z 275DEG 24KT 4291 9543 $$ SCHUMACHER
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 3, 8:37 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee | 38 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, 4:06 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.