Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 242, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 1, 2012, 9:19 PM CDT for Dakota County, Goodhue County, Rice County, Minnesota. It was in force for 41 min. 5 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 1, 2012, 9:19 PM CDT (02:19 UTC)
- Expired
- Aug 1, 2012, 10:00 PM CDT
- In force
- 41 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Dakota County, MN, Goodhue County, MN, Rice County, MN
The radar
The Minneapolis radar (KMPX), 68 km from the middle of the area, began a volume at 02:20 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 1, 9:19 PM CDT | TSTM WND GST 48 | Cannon Falls, MN | MNDOT ROAD SENSOR US-52 MILE POST 90. |
| Aug 1, 9:24 PM CDT | TSTM WND DMG | Northfield, MN | 50 FT LONG LARGE TREE LIMB DOWN AND OTHER DEBRIS. |
| Aug 1, 9:30 PM CDT | HAIL 1 | 1 Ssw Northfield, MN | TIME ESTIMATED |
| Aug 1, 9:34 PM CDT | TSTM WND DMG | 1 Ne Dundas, MN | LARGE TREE DOWN. |
| Aug 1, 10:10 PM CDT | HAIL 0.75 | Zumbrota, MN | DIME SIZED HAIL. ESTIMATED 50 MPH WINDS WITH SOME BRANCHES DOWN. TIME ESTIMATED. |
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 |
|---|---|---|---|
| Aug 1, 5:12 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 2.3 hours before the alert went out and 71 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
- 2247 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 1724 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
728 WUUS53 KMPX 020219 SVRMPX MNC037-049-131-020300- /O.NEW.KMPX.SV.W.0242.120802T0219Z-120802T0300Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 919 PM CDT WED AUG 1 2012 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN DAKOTA COUNTY IN EAST CENTRAL MINNESOTA... WESTERN GOODHUE COUNTY IN SOUTHEAST MINNESOTA... RICE COUNTY IN SOUTH CENTRAL MINNESOTA... * UNTIL 1000 PM CDT * AT 915 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 60 MPH. THIS STORM WAS LOCATED NEAR DUNDAS...OR ABOUT 10 MILES NORTH OF FARIBAULT...AND MOVING EAST AT 30 MPH. LOCATIONS IN THE WARNING INCLUDE... FARIBAULT... DUNDAS... NORTHFIELD... RUSKIN... NERSTRAND... STANTON... DENNISON... KENYON... CANNON FALLS... BOMBAY... WASTEDO... HADER... WANAMINGO... ZUMBROTA... 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 4457 9263 4422 9264 4428 9343 4456 9326 TIME...MOT...LOC 0219Z 280DEG 27KT 4444 9323 WIND...HAIL 60MPH 1.00IN $$
2 follow-up statements
751
WWUS53 KMPX 020236
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
936 PM CDT WED AUG 1 2012
MNC037-049-131-020300-
/O.CON.KMPX.SV.W.0242.000000T0000Z-120802T0300Z/
DAKOTA MN-GOODHUE MN-RICE MN-
936 PM CDT WED AUG 1 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
RICE...CENTRAL GOODHUE AND SOUTHEASTERN DAKOTA COUNTIES UNTIL 1000 PM
CDT...
AT 933 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS OF 60 MPH.
THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM RANDOLPH TO
DENNISON TO NERSTRAND...MOVING EAST AT 30 MPH. NICKEL SIZE HAIL MAY
ALSO ACCOMPANY THESE DAMAGING WINDS.
LOCATIONS IMPACTED INCLUDE...
DENNISON...KENYON...CANNON FALLS...BOMBAY...WASTEDO...HADER...
WANAMINGO...WELCH AND ZUMBROTA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
&&
LAT...LON 4427 9324 4456 9313 4457 9263 4422 9264
TIME...MOT...LOC 0237Z 280DEG 27KT 4453 9301 4442 9304
4429 9305
WIND...HAIL 60MPH 0.88IN
$$
LS525
WWUS53 KMPX 020301
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1001 PM CDT WED AUG 1 2012
MNC037-049-131-020316-
/O.EXP.KMPX.SV.W.0242.000000T0000Z-120802T0300Z/
DAKOTA MN-GOODHUE MN-RICE MN-
1001 PM CDT WED AUG 1 2012
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN RICE...CENTRAL GOODHUE
AND SOUTHEASTERN DAKOTA COUNTIES HAS EXPIRED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1 AM CDT.
LAT...LON 4427 9324 4456 9313 4457 9263 4422 9264
TIME...MOT...LOC 0236Z 280DEG 27KT 4450 9302 4439 9306
4426 9307
$$
JRBThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 7:08 PM CDT | Severe Thunderstorm Warning | MPX | McLeod, Renville, Sibley | 37 min |
| Aug 1, 7:44 PM CDT | Special Weather Statement | MPX | Blue Earth, Nicollet, Sibley, Watonwan | 61 min |
| Aug 1, 8:48 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin, Scott | 20 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.