Alert archive / Minnesota / Tornado Warnings in 2012
Tornado Warning 9, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Apr 21, 2012, 4:09 PM CDT for Chippewa County, Kandiyohi County, Renville County, Minnesota. It was in force for 36 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
- Apr 21, 2012, 4:09 PM CDT (21:09 UTC)
- Expired
- Apr 21, 2012, 4:45 PM CDT
- In force
- 36 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Chippewa County, MN, Kandiyohi County, MN, Renville County, MN
The radar
The Minneapolis radar (KMPX), 135 km from the middle of the area, began a volume at 21:11 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 12:00Z, 9.2 hours before the alert went out and 132 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1566 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
093 WFUS53 KMPX 212109 TORMPX MNC023-067-129-212145- /O.NEW.KMPX.TO.W.0009.120421T2109Z-120421T2145Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 409 PM CDT SAT APR 21 2012 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * TORNADO WARNING FOR... EAST CENTRAL CHIPPEWA COUNTY IN WEST CENTRAL MINNESOTA... SOUTHWESTERN KANDIYOHI COUNTY IN CENTRAL MINNESOTA... NORTHWESTERN RENVILLE COUNTY IN CENTRAL MINNESOTA... * UNTIL 445 PM CDT * AT 404 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS NEAR CLARA CITY...OR OVER CLARA CITY...AND MOVING SOUTHEAST AT 25 MPH. * LOCATIONS IN THE WARNING INCLUDE... CLARA CITY... PRINSBURG... PRECAUTIONARY/PREPAREDNESS ACTIONS... WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. && LAT...LON 4493 9512 4484 9527 4496 9547 4501 9539 TIME...MOT...LOC 2108Z 301DEG 23KT 4495 9535 $$ CLF
1 follow-up statement
869 WWUS53 KMPX 212137 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 437 PM CDT SAT APR 21 2012 MNC023-067-129-212145- /O.CON.KMPX.TO.W.0009.000000T0000Z-120421T2145Z/ CHIPPEWA MN-KANDIYOHI MN-RENVILLE MN- 437 PM CDT SAT APR 21 2012 ...A TORNADO WARNING REMAINS IN EFFECT FOR EXTREME NORTHWESTERN RENVILLE AND SOUTHWESTERN KANDIYOHI COUNTIES IN CENTRAL MINNESOTA... AND SOUTHEASTERN CHIPPEWA COUNTY IN WEST CENTRAL MINNESOTA UNTIL 445 PM CDT... AT 435 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS STORM WAS LOCATED NEAR PRINSBURG...OR 15 MILES NORTHWEST OF OLIVIA...MOVING SOUTHEAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF EXTREME NORTHWESTERN RENVILLE COUNTY. LAT...LON 4498 9529 4493 9512 4484 9527 4491 9539 TIME...MOT...LOC 2137Z 310DEG 22KT 4487 9524 $$
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 1:50 PM CDT | Special Weather Statement | MPX | Stevens | 55 min |
| Apr 21, 2:04 PM CDT | Severe Thunderstorm Warning | MPX | Stevens | 14 min |
| Apr 21, 2:28 PM CDT | Special Weather Statement | MPX | Chippewa, Douglas, Pope, Redwood, Swift | 62 min |
| Apr 21, 3:22 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood | 38 min |
| Apr 21, 3:29 PM CDT | Tornado Warning | MPX | Chippewa, Swift | 46 min |
| Apr 21, 3:33 PM CDT | Tornado Warning | MPX | Redwood | 28 min |
| Apr 21, 4:21 PM CDT | Special Weather Statement | MPX | Pope | 39 min |
| Apr 21, 4:49 PM CDT | Special Weather Statement | MPX | Renville | 41 min |
| Apr 21, 5:01 PM CDT | Tornado Warning | MPX | Martin, Watonwan | 44 min |
| Apr 21, 5:53 PM CDT | Special Weather Statement | MPX | Martin | 37 min |
Nearby
Tornado Warnings in Minnesota, 2012Every tornado warning in 2012Tornadoes 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.