Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 277, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 4, 2012, 5:06 PM CDT for Eau Claire County, Wisconsin. It was in force for 39 min. 2 reports 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
- Sep 4, 2012, 5:06 PM CDT (22:06 UTC)
- Expired
- Sep 4, 2012, 5:45 PM CDT
- In force
- 39 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Eau Claire County, WI
The radar
The La Crosse radar (KARX), 90 km from the middle of the area, began a volume at 22:06 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 |
|---|---|---|---|
| Sep 4, 5:46 PM CDT | HAIL 1.75 | 3 S Fall Creek, WI | |
| Sep 4, 5:46 PM CDT | HAIL 2 | 3 S Fall Creek, WI |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 4, 3:27 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 10.1 hours before the alert went out and 185 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
- 1446 J/kg
- Mixed-layer CIN
- -171 J/kg
- Mixed-layer LCL
- 1471 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 172 m²/s²
- 0-3 km storm-relative helicity
- 221 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.8
The text
As transmitted, in the capitals the NWS used until 2016.
191
WUUS53 KMPX 042206
SVRMPX
WIC035-042245-
/O.NEW.KMPX.SV.W.0277.120904T2206Z-120904T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
506 PM CDT TUE SEP 4 2012
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN EAU CLAIRE COUNTY IN WEST CENTRAL WISCONSIN...
* UNTIL 545 PM CDT
* AT 504 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 60 MPH. THIS
STORM WAS LOCATED 5 MILES NORTHWEST OF STRUM...OR ABOUT 11 MILES
EAST OF MONDOVI...AND MOVING EAST AT 25 MPH.
LOCATIONS IN THE WARNING INCLUDE...
ALLEN...
BRACKETT...
FOSTER...
AUGUSTA...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH AND LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 4459 9128 4459 9129 4459 9149 4469 9153
4477 9107 4459 9101
TIME...MOT...LOC 2206Z 258DEG 21KT 4462 9143
WIND...HAIL 60MPH 1.00IN
$$2 follow-up statements
928 WWUS53 KMPX 042221 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 521 PM CDT TUE SEP 4 2012 WIC035-042245- /O.CON.KMPX.SV.W.0277.000000T0000Z-120904T2245Z/ EAU CLAIRE WI- 521 PM CDT TUE SEP 4 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN EAU CLAIRE COUNTY IN WEST CENTRAL WISCONSIN UNTIL 545 PM CDT... AT 518 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS OF 60 MPH. THIS STORM WAS LOCATED 7 MILES NORTH OF STRUM...OR 14 MILES SOUTHEAST OF EAU CLAIRE...MOVING EAST AT 25 MPH. NICKEL SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS. LOCATIONS IMPACTED INCLUDE... AUGUSTA. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. && LAT...LON 4459 9139 4470 9148 4477 9107 4459 9101 TIME...MOT...LOC 2221Z 253DEG 21KT 4465 9131 WIND...HAIL 60MPH 0.88IN $$
367 WWUS53 KMPX 042238 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 538 PM CDT TUE SEP 4 2012 WIC035-042253- /O.EXP.KMPX.SV.W.0277.000000T0000Z-120904T2245Z/ EAU CLAIRE WI- 538 PM CDT TUE SEP 4 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN EAU CLAIRE COUNTY IN WEST CENTRAL WISCONSIN WILL EXPIRE AT 545 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. THIS STORM HAS MERGED WITH A STORM OVER CENTRAL EAU CLAIRE COUNTY THAT IS COVER IS SEVERE THUNDERSTORM WARNING NUMBER 278. LAT...LON 4459 9139 4470 9148 4477 9107 4459 9101 TIME...MOT...LOC 2238Z 253DEG 21KT 4468 9118 $$ LS
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 3:55 PM CDT | Special Weather Statement | MPX | Chippewa | 50 min |
| Sep 4, 4:17 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Chippewa, Rusk | 43 min |
| Sep 4, 4:55 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa | 50 min |
| Sep 4, 5:19 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 26 min |
| Sep 4, 5:39 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Eau Claire | 36 min |
| Sep 4, 6:11 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 30 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 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.