Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 88, NWS La Crosse, WI

August 15, 2012Buffalo County, Trempealeau County, Wisconsin; Wabasha County, Winona County, Minnesota

NWS La Crosse, WI issued this severe thunderstorm warning at Aug 15, 2012, 11:37 PM CDT for Buffalo County, Trempealeau County, Wisconsin; Wabasha County, Winona County, Minnesota. It was in force for 38 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
Aug 15, 2012, 11:37 PM CDT (04:37 UTC)
Expired
Aug 16, 2012, 12:15 AM CDT
In force
38 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Wabasha County, MN, Winona County, MN, Buffalo County, WI, Trempealeau County, WI

The radar

The La Crosse radar (KARX), 77 km from the middle of the area, began a volume at 04:38 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

TimeReportWhereRemark
Aug 16, 12:00 AM CDTTSTM WND DMG2 Nnw Fountain City, WITREES DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.6 hours before the alert went out and 151 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.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2012-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 700 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2012-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
700 J/kg
Mixed-layer CIN
-151 J/kg
Mixed-layer LCL
1324 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
175 m²/s²
Significant tornado parameter
0.1
Supercell composite
5.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

536 
WUUS53 KARX 160437
SVRARX
MNC157-169-WIC011-121-160515-
/O.NEW.KARX.SV.W.0088.120816T0437Z-120816T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1137 PM CDT WED AUG 15 2012

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN WABASHA COUNTY IN SOUTHEAST MINNESOTA...
  NORTHWESTERN WINONA COUNTY IN SOUTHEAST MINNESOTA...
  CENTRAL BUFFALO COUNTY IN WEST CENTRAL WISCONSIN...
  CENTRAL TREMPEALEAU COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 1215 AM CDT

* AT 1134 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ROUGHLY ALONG A LINE EXTENDING FROM ALMA TO
  BUFFALO...MOVING EAST AT 40 MPH. THESE STORMS CAN PRODUCE QUARTER
  SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.  

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  MODENA AROUND 1140 PM...
  ARCADIA AND INDEPENDENCE AROUND 1210 AM...
  WHITEHALL AROUND 1215 AM...

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 4442 9209 4448 9207 4445 9130 4413 9134
      4415 9213
TIME...MOT...LOC 0437Z 270DEG 34KT 4442 9187 4421 9190
WIND...HAIL 60MPH 1.00IN

$$

HALBACH
1 follow-up statement
418 
WWUS53 KARX 160452
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1152 PM CDT WED AUG 15 2012

MNC157-169-WIC011-121-160515-
/O.CON.KARX.SV.W.0088.000000T0000Z-120816T0515Z/
WABASHA MN-WINONA MN-BUFFALO WI-TREMPEALEAU WI-
1152 PM CDT WED AUG 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
TREMPEALEAU...SOUTHERN BUFFALO...NORTHWESTERN WINONA AND EAST CENTRAL
WABASHA COUNTIES UNTIL 1215 AM CDT...

AT 1147 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR HIGHWAY 88 AND COUNTY O...OR 9 MILES
SOUTHEAST OF ALMA...MOVING EAST AT 40 MPH. THIS STORM CAN PRODUCE
QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HIGHWAY 95 AND COUNTY C AND WICKHAM VALLEY AROUND 1205 AM...
  ARCADIA AND INDEPENDENCE AROUND 1210 AM...
  WHITEHALL AND SQUARE BLUFF AROUND 1215 AM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE
AND STAY AWAY FROM WINDOWS.

LIGHTNING AND FALLING TREES CAN KILL. CAMPING VEHICLES AND TENTS ARE
NOT SAFE DURING THUNDERSTORMS. MOVE TO A PRE-DESIGNATED SHELTER IF
AVAILABLE. IF NO STRONG SHELTER IS AVAILABLE...SEEK SHELTER IN A
DEPRESSION OR RAVINE...BUT AVOID STREAM BEDS AND DRY WASHES. ASSUME
THE LIGHTNING POSITION BY MINIMIZING YOUR HEIGHT AND CONTACT WITH THE
GROUND. CROUCH LOW AND WRAP YOUR ARMS AROUND YOUR LEGS.

&&

LAT...LON 4438 9188 4445 9130 4413 9134 4415 9213
TIME...MOT...LOC 0452Z 276DEG 35KT 4426 9171
WIND...HAIL 60MPH 1.00IN

$$

HALBACH

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 16, 12:03 AM CDTSevere Thunderstorm WarningARXBuffalo, Trempealeau27 min
Aug 16, 12:29 AM CDTSevere Thunderstorm WarningARXJackson, La Crosse, Monroe, Trempealeau46 min
Aug 16, 1:08 AM CDTSevere Thunderstorm WarningARXMonroe, Vernon37 min
Aug 16, 3:09 AM CDTSevere Thunderstorm WarningARXAdams, Juneau36 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012Severe Thunderstorm Warnings in Minnesota, 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.