Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 87, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Aug 20, 2011, 6:10 AM CDT for Grant County, Wisconsin. It was in force for 21 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 20, 2011, 6:10 AM CDT (11:10 UTC)
- Expired
- Aug 20, 2011, 6:31 AM CDT
- In force
- 21 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Grant County, WI
The radar
The La Crosse radar (KARX), 117 km from the middle of the area, began a volume at 11:12 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 20, 6:12 AM CDT | HAIL 1 | 5 W Lancaster, WI |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 11.2 hours before the alert went out and 137 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
- 511 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 1905 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- -62 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
581
WUUS53 KARX 201110
SVRARX
WIC043-201215-
/O.NEW.KARX.SV.W.0087.110820T1110Z-110820T1215Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
610 AM CDT SAT AUG 20 2011
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL GRANT COUNTY IN SOUTHWEST WISCONSIN...
* UNTIL 715 AM CDT
* AT 608 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR KLONDYKE SECLUDED ACRES...OR NEAR
LANCASTER...MOVING EAST AT 20 MPH. THIS STORM CAN PRODUCE
QUARTER SIZE HAIL.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
LANCASTER AROUND 615 AM...
LANCASTER MUNICIPAL AIRPORT AROUND 620 AM...
STITZER AROUND 625 AM...
ELLENBORO AROUND 630 AM...
ANNATON AROUND 640 AM...
UNION AROUND 645 AM...
PLATTEVILLE AROUND 650 AM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.
&&
LAT...LON 4276 9090 4293 9090 4297 9043 4291 9042
4273 9042
TIME...MOT...LOC 1110Z 270DEG 18KT 4285 9075
WIND...HAIL <50MPH 1.00IN
$$
JW2 follow-up statements
393
WWUS53 KARX 201119
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
619 AM CDT SAT AUG 20 2011
WIC043-201215-
/O.CON.KARX.SV.W.0087.000000T0000Z-110820T1215Z/
GRANT WI-
619 AM CDT SAT AUG 20 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL GRANT
COUNTY UNTIL 715 AM CDT...
AT 617 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR LANCASTER...MOVING EAST AT 20 MPH.
THIS STORM CAN PRODUCE QUARTER SIZE HAIL.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
STITZER AROUND 625 AM...
ELLENBORO AROUND 630 AM...
ANNATON AROUND 640 AM...
UNION AROUND 645 AM...
PLATTEVILLE AROUND 650 AM...
ARTHUR AND LIVINGSTON AROUND 655 AM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.
&&
LAT...LON 4276 9081 4294 9081 4297 9043 4291 9042
4273 9042
TIME...MOT...LOC 1119Z 270DEG 18KT 4285 9069
WIND...HAIL <50MPH 1.00IN
$$
JW654
WWUS53 KARX 201131
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
631 AM CDT SAT AUG 20 2011
WIC043-201140-
/O.CAN.KARX.SV.W.0087.000000T0000Z-110820T1215Z/
GRANT WI-
631 AM CDT SAT AUG 20 2011
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL GRANT COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED. HOWEVER...THE
STORM MAY PRODUCE SMALL HAIL AND WIND GUSTS TO 30 MPH.
LAT...LON 4276 9081 4294 9081 4297 9043 4291 9042
4273 9042
TIME...MOT...LOC 1130Z 270DEG 18KT 4285 9061
$$Nearby
Severe Thunderstorm Warnings in Wisconsin, 2011Every severe thunderstorm warning in 2011
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.