Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 228, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Nov 10, 2012, 8:29 PM CST for Cherokee County, Ida County, Woodbury County, Iowa. It was in force for 31 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
- Nov 10, 2012, 8:29 PM CST (02:29 UTC)
- Expired
- Nov 10, 2012, 9:00 PM CST
- In force
- 31 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Cherokee County, IA, Ida County, IA, Woodbury County, IA
The radar
The Omaha radar (KOAX), 127 km from the middle of the area, began a volume at 02:29 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 00:00Z, 2.5 hours before the alert went out and 127 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
- 567 J/kg
- Mixed-layer CIN
- -105 J/kg
- Mixed-layer LCL
- 1120 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 245 m²/s²
- 0-3 km storm-relative helicity
- 228 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
702
WUUS53 KFSD 110229
SVRFSD
IAC035-093-193-110300-
/O.NEW.KFSD.SV.W.0228.121111T0229Z-121111T0300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
829 PM CST SAT NOV 10 2012
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN CHEROKEE COUNTY IN NORTHWEST IOWA...
IDA COUNTY IN WEST CENTRAL IOWA...
EASTERN WOODBURY COUNTY IN WEST CENTRAL IOWA...
* UNTIL 900 PM CST
* AT 828 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS
IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR HORNICK...OR 25
MILES SOUTHEAST OF SIOUX CITY...AND MOVING NORTHEAST AT 55 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
DANBURY AROUND 840 PM CST...
ANTHON AROUND 845 PM CST...
BATTLE CREEK AROUND 850 PM CST...
CORRECTIONVILLE...PIERSON...CUSHING AND IDA GROVE AROUND 855 PM
CST...
WASHTA AND HOLSTEIN AROUND 900 PM CST...
OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE OTO.
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 4225 9624 4257 9588 4257 9586 4259 9586
4267 9577 4236 9538 4220 9580 4221 9618
TIME...MOT...LOC 0228Z 215DEG 56KT 4224 9607
WIND...HAIL 60MPH <1.00IN
$$
JM2 follow-up statements
130
WWUS53 KFSD 110246
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
846 PM CST SAT NOV 10 2012
IAC035-093-193-110300-
/O.CON.KFSD.SV.W.0228.000000T0000Z-121111T0300Z/
IDA IA-CHEROKEE IA-WOODBURY IA-
846 PM CST SAT NOV 10 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
WOODBURY...SOUTHWESTERN CHEROKEE AND IDA COUNTIES UNTIL 900 PM CST...
AT 846 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED NEAR ANTHON...OR 22 MILES WEST OF
IDA GROVE...MOVING NORTHEAST AT 55 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
WASHTA AND HOLSTEIN AROUND 855 PM CST...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 4240 9608 4256 9589 4257 9586 4259 9586
4267 9577 4236 9538 4220 9580
TIME...MOT...LOC 0246Z 215DEG 56KT 4247 9585
WIND...HAIL 60MPH <1.00IN
$$
JM810
WWUS53 KFSD 110255
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
855 PM CST SAT NOV 10 2012
IAC035-093-193-110305-
/O.EXP.KFSD.SV.W.0228.000000T0000Z-121111T0300Z/
IDA IA-CHEROKEE IA-WOODBURY IA-
855 PM CST SAT NOV 10 2012
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WOODBURY...
SOUTHWESTERN CHEROKEE AND IDA COUNTIES WILL EXPIRE AT 900 PM CST...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA...HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.
LAT...LON 4240 9608 4256 9589 4257 9586 4259 9586
4267 9577 4236 9538 4220 9580
TIME...MOT...LOC 0255Z 215DEG 56KT 4258 9574
$$
JMNearby
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.