Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 270, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 23, 2012, 7:46 PM CDT for Carver County, McLeod County, Wright County, Minnesota. It was in force for 44 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
- Aug 23, 2012, 7:46 PM CDT (00:46 UTC)
- Expired
- Aug 23, 2012, 8:30 PM CDT
- In force
- 44 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Carver County, MN, McLeod County, MN, Wright County, MN
The radar
The Minneapolis radar (KMPX), 39 km from the middle of the area, began a volume at 00:49 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 23, 7:55 PM CDT | HAIL 1 | 3 Ene Winsted, MN | |
| Aug 23, 8:00 PM CDT | TSTM WND DMG | 4 Nnw New Germany, MN | LARGE POLE BARN LIFTED UP AND DROPPED. LARGE AREA OF GRASS FLATTENED ABOUT 1/2 MILE FARTHER SOUTH. |
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, 0.8 hours before the alert went out and 37 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
- 1357 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 1842 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 223 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 8.5
The text
As transmitted, in the capitals the NWS used until 2016.
069 WUUS53 KMPX 240046 SVRMPX MNC019-085-171-240130- /O.NEW.KMPX.SV.W.0270.120824T0046Z-120824T0130Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 746 PM CDT THU AUG 23 2012 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME NORTHWESTERN CARVER COUNTY IN EAST CENTRAL MINNESOTA... NORTHEASTERN MCLEOD COUNTY IN CENTRAL MINNESOTA... SOUTH CENTRAL WRIGHT COUNTY IN CENTRAL MINNESOTA... * UNTIL 830 PM CDT * AT 744 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 60 MPH. THIS STORM WAS LOCATED 15 MILES NORTHWEST OF WACONIA...OR ABOUT 18 MILES EAST OF HUTCHINSON...AND MOVING NORTHEAST AT 10 MPH. LOCATIONS IN THE WARNING INCLUDE... MONTROSE... WAVERLY... 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 4516 9397 4507 9378 4491 9402 4495 9413 TIME...MOT...LOC 0046Z 225DEG 7KT 4498 9403 WIND...HAIL 60MPH 1.00IN $$ JRB
2 follow-up statements
263
WWUS53 KMPX 240057
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
757 PM CDT THU AUG 23 2012
MNC085-240112-
/O.CAN.KMPX.SV.W.0270.000000T0000Z-120824T0130Z/
MCLEOD MN-
757 PM CDT THU AUG 23 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MCLEOD COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 4510 9385 4507 9378 4491 9401 4492 9402
4497 9402 4498 9403 4505 9405 4516 9397
TIME...MOT...LOC 0057Z 225DEG 7KT 4499 9401
$$
MNC019-171-240130-
/O.CON.KMPX.SV.W.0270.000000T0000Z-120824T0130Z/
CARVER MN-WRIGHT MN-
757 PM CDT THU AUG 23 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
WRIGHT AND EXTREME NORTHWESTERN CARVER COUNTIES UNTIL 830 PM CDT...
AT 753 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS OF 60 MPH. THIS STORM WAS LOCATED 14 MILES NORTHWEST OF
WACONIA...OR 19 MILES EAST OF HUTCHINSON...MOVING NORTHEAST AT 10
MPH.
LOCATIONS IMPACTED INCLUDE...
WAVERLY AND MONTROSE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
&&
LAT...LON 4510 9385 4507 9378 4491 9401 4492 9402
4497 9402 4498 9403 4505 9405 4516 9397
TIME...MOT...LOC 0057Z 225DEG 7KT 4499 9401
WIND...HAIL 60MPH 1.00IN
$$
JRB153
WWUS53 KMPX 240105
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
805 PM CDT THU AUG 23 2012
MNC019-171-240130-
/O.CON.KMPX.SV.W.0270.000000T0000Z-120824T0130Z/
CARVER MN-WRIGHT MN-
805 PM CDT THU AUG 23 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
WRIGHT AND EXTREME NORTHWESTERN CARVER COUNTIES UNTIL 830 PM CDT...
AT 802 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING QUARTER SIZE HAIL ABOUT 5 MILES NORTHEAST OF
WINSTED. THIS STORM WAS LOCATED 14 MILES SOUTHWEST OF BUFFALO...OR
20 MILES EAST OF HUTCHINSON...MOVING NORTHEAST AT 10 MPH.
LOCATIONS IMPACTED INCLUDE...
WAVERLY AND MONTROSE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
&&
LAT...LON 4508 9379 4507 9379 4491 9401 4492 9402
4498 9402 4498 9403 4505 9405 4514 9393
TIME...MOT...LOC 0104Z 225DEG 7KT 4500 9400
WIND...HAIL <50MPH 1.00IN
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 7:02 PM CDT | Special Weather Statement | MPX | Wright | 28 min |
| Aug 23, 7:08 PM CDT | Special Weather Statement | MPX | Redwood | 52 min |
| Aug 23, 7:12 PM CDT | Severe Thunderstorm Warning | MPX | Wright | 33 min |
| Aug 23, 7:53 PM CDT | Severe Thunderstorm Warning | MPX | Renville, Sibley | 37 min |
| Aug 23, 8:07 PM CDT | Severe Thunderstorm Warning | MPX | McLeod, Sibley | 38 min |
| Aug 23, 8:37 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin, McLeod, Sibley | 38 min |
| Aug 23, 8:47 PM CDT | Areal Flood Advisory | MPX | Carver, Hennepin, McLeod, Wright | 3 hr |
| Aug 23, 8:49 PM CDT | Tornado Warning | MPX | Carver | 14 min |
| Aug 23, 9:00 PM CDT | Special Weather Statement | MPX | Carver, Dakota, Hennepin, Ramsey, Scott, Washington and 1 more | 90 min |
| Aug 23, 9:02 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin, Scott | 23 min |
| Aug 23, 9:32 PM CDT | Areal Flood Advisory | MPX | Carver, Dakota, Hennepin, Ramsey, Scott | 3 hr |
| Aug 23, 10:33 PM CDT | Flash Flood Warning | MPX | Carver, Wright | 2 hr |
| Aug 23, 10:43 PM CDT | Special Weather Statement | MPX | Scott | 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.