Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 233, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 13, 2012, 8:29 PM CDT for Steele County, Minnesota. It was in force for 31 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
- Jul 13, 2012, 8:29 PM CDT (01:29 UTC)
- Expired
- Jul 13, 2012, 9:00 PM CDT
- In force
- 31 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Steele County, MN
The radar
The Minneapolis radar (KMPX), 97 km from the middle of the area, began a volume at 01:30 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 nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 1.5 hours before the alert went out and 98 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
- 286 J/kg
- Mixed-layer CIN
- -125 J/kg
- Mixed-layer LCL
- 1653 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
428 WUUS53 KMPX 140129 SVRMPX MNC147-140200- /O.NEW.KMPX.SV.W.0233.120714T0129Z-120714T0200Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 829 PM CDT FRI JUL 13 2012 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL STEELE COUNTY IN SOUTH CENTRAL MINNESOTA... * UNTIL 900 PM CDT * AT 825 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR OWATONNA...AND MOVING EAST AT 20 MPH. LOCATIONS IN THE WARNING INCLUDE... MAINLY RURAL AREAS OF EASTERN STEELE COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4400 9325 4410 9320 4407 9303 4396 9304 TIME...MOT...LOC 0129Z 286DEG 15KT 4405 9313 WIND...HAIL <50MPH 1.00IN $$
1 follow-up statement
621 WWUS53 KMPX 140151 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 851 PM CDT FRI JUL 13 2012 MNC147-140207- /O.EXP.KMPX.SV.W.0233.000000T0000Z-120714T0200Z/ STEELE MN- 851 PM CDT FRI JUL 13 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL STEELE COUNTY WILL EXPIRE AT 900 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF THE WARNED AREA. LAT...LON 4400 9325 4410 9320 4407 9303 4396 9304 TIME...MOT...LOC 0152Z 286DEG 15KT 4402 9300 $$
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 7:12 PM CDT | Special Weather Statement | MPX | Faribault | 48 min |
| Jul 13, 7:16 PM CDT | Special Weather Statement | MPX | Steele | 44 min |
| Jul 13, 7:36 PM CDT | Severe Thunderstorm Warning | MPX | Faribault, Freeborn | 24 min |
| Jul 13, 7:50 PM CDT | Severe Thunderstorm Warning | MPX | Steele | 25 min |
| Jul 13, 7:57 PM CDT | Special Weather Statement | MPX | Freeborn | 48 min |
| Jul 13, 8:16 PM CDT | Severe Thunderstorm Warning | MPX | Freeborn | 31 min |
| Jul 13, 8:53 PM CDT | Special Weather Statement | MPX | Steele | 37 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.