Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 99, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Sep 4, 2012, 5:50 PM CDT for Houston County, Minnesota. It was in force for 40 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, 5:50 PM CDT (22:50 UTC)
- Expired
- Sep 4, 2012, 6:30 PM CDT
- In force
- 40 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
County Houston County, MN
The radar
The La Crosse radar (KARX), 38 km from the middle of the area, began a volume at 22:50 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, 6:00 PM CDT | HAIL 2.5 | Spring Grove, MN | |
| Sep 4, 6:05 PM CDT | HAIL 1 | Spring Grove, MN |
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, 10.8 hours before the alert went out and 214 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.
741 WUUS53 KARX 042250 SVRARX MNC055-042330- /O.NEW.KARX.SV.W.0099.120904T2250Z-120904T2330Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 550 PM CDT TUE SEP 4 2012 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN HOUSTON COUNTY IN SOUTHEAST MINNESOTA... * UNTIL 630 PM CDT * AT 545 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM LOCATED NEAR SPRING GROVE...OR 7 MILES SOUTHWEST OF CALEDONIA...MOVING EAST AT 25 MPH. THIS STORM CAN PRODUCE LARGE DAMAGING HAIL UP TO GOLF BALL SIZE AND DAMAGING WINDS IN EXCESS OF 60 MPH. TRAINED WEATHER SPOTTERS HAVE ALREADY REPORTED TENNIS BALL SIZE HAIL WITH THIS STORM. * THE SEVERE THUNDERSTORM WILL BE NEAR... CALEDONIA AND DUN ROMIN PARK CAMPGROUND AROUND 600 PM... EITZEN AROUND 605 PM... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. DAMAGING WINDS ARE ALSO EXPECTED...WHICH WILL UPROOT TREES AND DOWN POWER LINES. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4367 9144 4350 9144 4350 9173 4366 9173 TIME...MOT...LOC 2250Z 266DEG 23KT 4359 9159 WIND...HAIL 60MPH 1.75IN $$ BAUMGARDT
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 4:39 AM CDT | Dense Fog Advisory | ARX | Dodge, Fillmore, Houston, Mower, Olmsted, Wabasha and 1 more | 4 hr |
| Sep 4, 4:00 PM CDT | Severe Thunderstorm Warning | ARX | Winona | 30 min |
| Sep 4, 4:29 PM CDT | Severe Thunderstorm Warning | ARX | Winona | 46 min |
| Sep 4, 4:53 PM CDT | Areal Flood Advisory | ARX | Winona | 97 min |
| Sep 4, 5:17 PM CDT | Severe Thunderstorm Warning | ARX | Houston | 28 min |
| Sep 4, 5:29 PM CDT | Severe Thunderstorm Warning | ARX | Houston, Winona | 46 min |
| Sep 4, 5:38 PM CDT | Severe Thunderstorm Warning | ARX | Fillmore | 28 min |
| Sep 4, 6:14 PM CDT | Severe Thunderstorm Warning | ARX | Houston | 46 min |
Nearby
Severe 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.