Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 22, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 1, 2012, 8:09 PM CDT for Brown County, Nicollet County, Sibley County, Minnesota. It was in force for 66 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
- May 1, 2012, 8:09 PM CDT (01:09 UTC)
- Expired
- May 1, 2012, 9:15 PM CDT
- In force
- 66 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Brown County, MN, Nicollet County, MN, Sibley County, MN
The radar
The Minneapolis radar (KMPX), 92 km from the middle of the area, began a volume at 01:13 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 1, 2:59 PM CDT | Tornado Watch | SPC | 6 hr |
| May 1, 6:10 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 1.2 hours before the alert went out and 90 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
- 279 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 1279 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 227 m²/s²
- 0-3 km storm-relative helicity
- 393 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.9
The text
As transmitted, in the capitals the NWS used until 2016.
474
WUUS53 KMPX 020109
SVRMPX
MNC015-103-143-020215-
/O.NEW.KMPX.SV.W.0022.120502T0109Z-120502T0215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
809 PM CDT TUE MAY 1 2012
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
BROWN COUNTY IN SOUTH CENTRAL MINNESOTA...
NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA...
SOUTHERN SIBLEY COUNTY IN CENTRAL MINNESOTA...
* UNTIL 915 PM CDT
* AT 808 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 60 MPH. THIS
STORM WAS LOCATED NEAR SLEEPY EYE...OR ABOUT 17 MILES WEST OF NEW
ULM...AND MOVING EAST AT 30 MPH.
LOCATIONS IN THE WARNING INCLUDE...
NEW ULM...
GAYLORD...
EVAN...
SLEEPY EYE...
HANSKA...
ST GEORGE...
GIBBON...
KLOSSNER...
COURTLAND...
LAFAYETTE...
WINTHROP...
NORSELAND...
RUSH RIVER...
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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT TUESDAY EVENING
FOR SOUTHERN MINNESOTA.
&&
LAT...LON 4445 9462 4456 9462 4457 9390 4445 9403
4423 9425 4427 9438 4412 9438 4411 9496
4429 9487 4445 9485
TIME...MOT...LOC 0109Z 255DEG 27KT 4426 9478
WIND...HAIL 60MPH 1.00IN
$$3 follow-up statements
532
WWUS53 KMPX 020144
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
844 PM CDT TUE MAY 1 2012
MNC015-020159-
/O.CAN.KMPX.SV.W.0022.000000T0000Z-120502T0215Z/
BROWN MN-
844 PM CDT TUE MAY 1 2012
...THE SEVERE THUNDERSTORM WARNING FOR BROWN COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 4427 9438 4441 9451 4456 9443 4457 9390
4445 9403 4423 9425
TIME...MOT...LOC 0144Z 255DEG 27KT 4443 9422
$$
MNC103-143-020215-
/O.CON.KMPX.SV.W.0022.000000T0000Z-120502T0215Z/
NICOLLET MN-SIBLEY MN-
844 PM CDT TUE MAY 1 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
SIBLEY AND CENTRAL NICOLLET COUNTIES UNTIL 915 PM CDT...
AT 840 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 7 MILES EAST OF
LAFAYETTE...OR 9 MILES SOUTH OF GAYLORD...MOVING EAST AT 30 MPH.
LOCATIONS IMPACTED INCLUDE...
GAYLORD...NORSELAND...RUSH RIVER...NEW SWEDEN AND NEW ROME.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.
&&
LAT...LON 4427 9438 4441 9451 4456 9443 4457 9390
4445 9403 4423 9425
TIME...MOT...LOC 0144Z 255DEG 27KT 4443 9422
WIND...HAIL 60MPH 1.00IN
$$270
WWUS53 KMPX 020158
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
858 PM CDT TUE MAY 1 2012
MNC103-143-020215-
/O.CON.KMPX.SV.W.0022.000000T0000Z-120502T0215Z/
NICOLLET MN-SIBLEY MN-
858 PM CDT TUE MAY 1 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
SIBLEY AND NORTH CENTRAL NICOLLET COUNTIES UNTIL 915 PM CDT...
AT 854 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR NORSELAND...
OR 10 MILES SOUTHEAST OF GAYLORD...MOVING EAST AT 30 MPH.
LOCATIONS IMPACTED INCLUDE...
RUSH RIVER AND NEW ROME.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.
&&
LAT...LON 4436 9412 4440 9434 4456 9422 4457 9390
4445 9403
TIME...MOT...LOC 0158Z 255DEG 27KT 4444 9407
WIND...HAIL 60MPH 1.00IN
$$079
WWUS53 KMPX 020206
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
906 PM CDT TUE MAY 1 2012
MNC103-143-020221-
/O.EXP.KMPX.SV.W.0022.000000T0000Z-120502T0215Z/
NICOLLET MN-SIBLEY MN-
906 PM CDT TUE MAY 1 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SIBLEY AND NORTH
CENTRAL NICOLLET COUNTIES WILL EXPIRE AT 915 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA...HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.
IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO
WATCH REMAINS IN EFFECT UNTIL 10 PM CDT.
LAT...LON 4436 9412 4440 9434 4456 9422 4457 9390
4445 9403
TIME...MOT...LOC 0206Z 255DEG 27KT 4444 9398
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 7:08 PM CDT | Severe Thunderstorm Warning | MPX | Sherburne, Stearns, Wright | 52 min |
| May 1, 7:23 PM CDT | Special Weather Statement | MPX | Isanti, Kanabec | 52 min |
| May 1, 7:24 PM CDT | Severe Thunderstorm Warning | MPX | Carver, McLeod, Sibley | 51 min |
| May 1, 7:30 PM CDT | Severe Thunderstorm Warning | MPX | Chisago, Isanti, Kanabec | 45 min |
| May 1, 7:55 PM CDT | Special Weather Statement | MPX | Anoka | 50 min |
| May 1, 8:08 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Chisago, Isanti | 37 min |
| May 1, 8:13 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood | 25 min |
| May 1, 9:24 PM CDT | Special Weather Statement | MPX | Nicollet, Sibley | 51 min |
| May 1, 10:11 PM CDT | Special Weather Statement | MPX | Blue Earth, Faribault, Le Sueur, Martin, Nicollet | 49 min |
| May 1, 11:12 PM CDT | Special Weather Statement | MPX | Freeborn, Rice, Steele, Waseca | 48 min |
| May 2, 5:22 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Brown, Watonwan | 53 min |
| May 2, 5:50 PM CDT | Tornado Warning | MPX | Blue Earth, Brown, Nicollet, Watonwan | 40 min |
| May 2, 6:20 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Le Sueur, Nicollet, Waseca | 55 min |
| May 2, 6:45 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue, Rice, Steele | 60 min |
| May 2, 6:45 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood | 60 min |
| May 2, 6:58 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur, Rice, Steele, Waseca | 47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.