Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 174, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 25, 2012, 5:25 PM CDT for Cherokee County, O'Brien County, Iowa. It was in force for 35 min. 2 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
- Jul 25, 2012, 5:25 PM CDT (22:25 UTC)
- Expired
- Jul 25, 2012, 6:00 PM CDT
- In force
- 35 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 58.0 mph
Counties Cherokee County, IA, O'Brien County, IA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 25, 5:35 PM CDT | HAIL 2 | 2 Nne Granville, IA | |
| Jul 25, 5:38 PM CDT | HAIL 1.75 | 5 W Paullina, IA |
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 |
|---|---|---|---|
| Jul 25, 5:16 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 10.4 hours before the alert went out and 189 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
- 675 J/kg
- Mixed-layer CIN
- -402 J/kg
- Mixed-layer LCL
- 2150 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 222 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
565 WUUS53 KFSD 252225 SVRFSD IAC035-141-252300- /O.NEW.KFSD.SV.W.0174.120725T2225Z-120725T2300Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 525 PM CDT WED JUL 25 2012 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL CHEROKEE COUNTY IN NORTHWEST IOWA... SOUTHERN O'BRIEN COUNTY IN NORTHWEST IOWA... * UNTIL 600 PM CDT * AT 525 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL. THIS STORM WAS LOCATED NEAR GRANVILLE...OR 9 MILES EAST OF ORANGE CITY...AND MOVING EAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... PAULLINA AROUND 545 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 4285 9558 4291 9586 4307 9586 4303 9546 TIME...MOT...LOC 2225Z 276DEG 22KT 4301 9587 WIND...HAIL <58MPH 1.25IN $$ SCHUMACHER
2 follow-up statements
660 WWUS53 KFSD 252236 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 536 PM CDT WED JUL 25 2012 IAC035-141-252300- /O.CON.KFSD.SV.W.0174.000000T0000Z-120725T2300Z/ O'BRIEN IA-CHEROKEE IA- 536 PM CDT WED JUL 25 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN CHEROKEE AND SOUTHERN O'BRIEN COUNTIES UNTIL 600 PM CDT... AT 536 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL. THIS STORM WAS LOCATED NEAR GRANVILLE...OR 12 MILES EAST OF ORANGE CITY... MOVING EAST AT 25 MPH. IN ADDITION...AT 534 PM CDT GOLF BALL SIZE HAIL WAS REPORTED IN 3 MILES NORTH OF GRANVILLE BY THE PUBLIC WITH THIS STORM. THE SEVERE THUNDERSTORM WILL BE NEAR... PAULLINA AROUND 545 PM CDT... OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE CALUMET. PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS IF YOU ARE IN THE PATH OF THIS STORM. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4285 9558 4291 9586 4307 9586 4303 9546 TIME...MOT...LOC 2236Z 276DEG 22KT 4300 9578 WIND...HAIL <58MPH 1.75IN $$ SCHUMACHER
566 WWUS53 KFSD 252256 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 556 PM CDT WED JUL 25 2012 IAC035-141-252306- /O.EXP.KFSD.SV.W.0174.000000T0000Z-120725T2300Z/ O'BRIEN IA-CHEROKEE IA- 556 PM CDT WED JUL 25 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CHEROKEE AND SOUTHERN O'BRIEN COUNTIES WILL EXPIRE AT 600 PM CDT... 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 AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 4285 9558 4291 9586 4307 9586 4303 9546 TIME...MOT...LOC 2256Z 276DEG 22KT 4299 9561 $$ CHENARD
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 5:11 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 34 min |
| Jul 25, 5:15 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson | 39 min |
| Jul 25, 5:16 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 29 min |
| Jul 25, 5:31 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 59 min |
| Jul 25, 5:43 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 47 min |
| Jul 25, 6:03 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson | 42 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.