Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 161, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 29, 2012, 7:50 AM CDT for Cherokee County, Plymouth County, Woodbury County, Iowa. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 29, 2012, 7:50 AM CDT (12:50 UTC)
- Expired
- Jun 29, 2012, 8:15 AM CDT
- In force
- 25 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Cherokee County, IA, Plymouth County, IA, Woodbury County, IA
The radar
The Sioux Falls radar (KFSD), 120 km from the middle of the area, began a volume at 12:51 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, 0.8 hours before the alert went out and 153 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
- 1557 J/kg
- Mixed-layer CIN
- -244 J/kg
- Mixed-layer LCL
- 2623 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -101 m²/s²
- 0-3 km storm-relative helicity
- -107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
527 WUUS53 KFSD 291250 SVRFSD IAC035-149-193-291315- /O.NEW.KFSD.SV.W.0161.120629T1250Z-120629T1315Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 750 AM CDT FRI JUN 29 2012 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN CHEROKEE COUNTY IN NORTHWEST IOWA... SOUTHEASTERN PLYMOUTH COUNTY IN NORTHWEST IOWA... NORTH CENTRAL WOODBURY COUNTY IN WEST CENTRAL IOWA... * UNTIL 815 AM CDT * AT 750 AM 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 5 MILES WEST OF KINGSLEY...OR 15 MILES SOUTH OF LE MARS... AND MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... KINGSLEY AROUND 800 AM 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 4283 9586 4265 9568 4248 9606 4254 9633 TIME...MOT...LOC 1250Z 233DEG 18KT 4259 9605 WIND...HAIL 60MPH 1.00IN $$ BT
2 follow-up statements
529 WWUS53 KFSD 291300 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 800 AM CDT FRI JUN 29 2012 IAC035-149-193-291315- /O.CON.KFSD.SV.W.0161.000000T0000Z-120629T1315Z/ PLYMOUTH IA-CHEROKEE IA-WOODBURY IA- 800 AM CDT FRI JUN 29 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL WOODBURY...SOUTHWESTERN CHEROKEE AND SOUTHEASTERN PLYMOUTH COUNTIES UNTIL 815 AM CDT... AT 800 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR KINGSLEY...OR 17 MILES SOUTHEAST OF LE MARS... MOVING EAST AT 25 MPH. THIS SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTH CENTRAL WOODBURY...SOUTHEASTERN PLYMOUTH AND SOUTHWESTERN CHEROKEE COUNTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4273 9597 4265 9568 4248 9606 4254 9633 TIME...MOT...LOC 1300Z 254DEG 20KT 4259 9595 WIND...HAIL <58MPH 1.00IN $$ BT
026 WWUS53 KFSD 291306 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 806 AM CDT FRI JUN 29 2012 IAC035-149-193-291316- /O.EXP.KFSD.SV.W.0161.000000T0000Z-120629T1315Z/ PLYMOUTH IA-CHEROKEE IA-WOODBURY IA- 806 AM CDT FRI JUN 29 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL WOODBURY... SOUTHWESTERN CHEROKEE AND SOUTHEASTERN PLYMOUTH COUNTIES WILL EXPIRE AT 815 AM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY...HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 4273 9597 4265 9568 4248 9606 4254 9633 TIME...MOT...LOC 1306Z 254DEG 20KT 4260 9591 $$ BT
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.