Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 85, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Aug 8, 2012, 7:08 PM CDT for Chickasaw County, Howard County, Iowa. It was in force for 52 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
- Aug 8, 2012, 7:08 PM CDT (00:08 UTC)
- Expired
- Aug 8, 2012, 8:00 PM CDT
- In force
- 52 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Chickasaw County, IA, Howard County, IA
The radar
The La Crosse radar (KARX), 123 km from the middle of the area, began a volume at 00:10 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
Minneapolis, MN (KMPX), launched 00:00Z, 0.1 hours before the alert went out and 213 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
- 6 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 785 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
494
WUUS53 KARX 090008
SVRARX
IAC037-089-090100-
/O.NEW.KARX.SV.W.0085.120809T0008Z-120809T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
708 PM CDT WED AUG 8 2012
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CHICKASAW COUNTY IN NORTHEAST IOWA...
SOUTHERN HOWARD COUNTY IN NORTHEAST IOWA...
* UNTIL 800 PM CDT
* AT 705 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SEVERE THUNDERSTORMS ROUGHLY ALONG A LINE EXTENDING FROM ELMA TO
IONIA...MOVING EAST AT 20 MPH. THESE STORMS CAN PRODUCE QUARTER
SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. CHARLES CITY
AUTOMATED OBSERVING SYSTEM REPORTED A WIND GUST OF 63 MPH AT 655 PM.
* THE SEVERE THUNDERSTORMS WILL BE NEAR...
ELMA AROUND 720 PM...
NEW HAMPTON AROUND 725 PM...
FREDERICKSBURG AND JERICO AROUND 740 PM...
LAWLER AROUND 750 PM...
PROTIVIN AROUND 800 PM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THESE STORMS...PREPARE IMMEDIATELY FOR
LARGE HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 4334 9255 4333 9208 4291 9208 4290 9237
4290 9255 4329 9256
TIME...MOT...LOC 0008Z 263DEG 19KT 4326 9253 4308 9245
4299 9244
WIND...HAIL 60MPH 1.00IN
$$
DTJ3 follow-up statements
403
WWUS53 KARX 090024
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
724 PM CDT WED AUG 8 2012
IAC037-089-090100-
/O.CON.KARX.SV.W.0085.000000T0000Z-120809T0100Z/
HOWARD IA-CHICKASAW IA-
724 PM CDT WED AUG 8 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CHICKASAW AND
SOUTHERN HOWARD COUNTIES UNTIL 800 PM CDT...
AT 719 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM ELMA TO NEW
HAMPTON TO IONIA...MOVING EAST AT 20 MPH. THESE STORMS CAN PRODUCE
UP TO QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORMS WILL BE NEAR...
NEW HAMPTON AROUND 730 PM...
JERICO AROUND 735 PM...
LAWLER AND FREDERICKSBURG AROUND 750 PM...
PROTIVIN AROUND 755 PM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THESE STORMS...PREPARE IMMEDIATELY FOR
LARGE HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 4334 9255 4333 9208 4291 9208 4290 9237
4290 9255 4329 9256
TIME...MOT...LOC 0024Z 263DEG 19KT 4326 9231 4309 9233
4297 9237
WIND...HAIL 60MPH 1.00IN
$$
DTJ855
WWUS53 KARX 090041
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
741 PM CDT WED AUG 8 2012
IAC037-089-090100-
/O.CON.KARX.SV.W.0085.000000T0000Z-120809T0100Z/
HOWARD IA-CHICKASAW IA-
741 PM CDT WED AUG 8 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CHICKASAW AND
SOUTHEASTERN HOWARD COUNTIES UNTIL 800 PM CDT...
AT 738 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM ELMA TO JERICO
TO FREDERICKSBURG...MOVING EAST AT 20 MPH. THESE STORMS CAN PRODUCE
DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORMS WILL BE NEAR...
LAWLER AND FREDERICKSBURG AROUND 755 PM...
PROTIVIN AROUND 800 PM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THESE STORMS...PREPARE IMMEDIATELY FOR
DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS.
TORRENTIAL RAINFALL FROM THESE STORMS MAY ALSO CAUSE THE PONDING OF
WATER ON ROADWAYS AND LOCALIZED FLOODING.
&&
LAT...LON 4321 9251 4333 9239 4333 9208 4291 9208
4290 9255
TIME...MOT...LOC 0041Z 263DEG 19KT 4327 9230 4316 9220
4298 9229
WIND...HAIL 60MPH <.50IN
$$
DTJ794
WWUS53 KARX 090055
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
755 PM CDT WED AUG 8 2012
IAC037-089-090105-
/O.EXP.KARX.SV.W.0085.000000T0000Z-120809T0100Z/
HOWARD IA-CHICKASAW IA-
755 PM CDT WED AUG 8 2012
...THE SEVERE THUNDERSTORM WARNING FOR CHICKASAW AND SOUTHEASTERN
HOWARD COUNTIES WILL EXPIRE AT 800 PM CDT...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS. HOWEVER...THE LINE OF STORMS REMAINS STRONG AND COULD
PRODUCE SMALL HAIL AND GUSTY WINDS...IN ADDITION TO LIGHTNING AND
HEAVY RAIN.
LAT...LON 4321 9251 4333 9239 4333 9208 4291 9208
4290 9255
TIME...MOT...LOC 0055Z 111DEG 10KT 4328 9228 4317 9218
4299 9228
$$
DTJThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 4:49 PM CDT | Severe Thunderstorm Warning | ARX | Fayette, Winneshiek | 56 min |
| Aug 9, 4:55 PM CDT | Tornado Warning | ARX | Fayette, Winneshiek | 20 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.