Alert archive / Minnesota / Tornado Warnings in 2012
Tornado Warning 8, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Apr 21, 2012, 3:33 PM CDT for Redwood County, Minnesota. It was in force for 28 min. 1 report 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
- Apr 21, 2012, 3:33 PM CDT (20:33 UTC)
- Expired
- Apr 21, 2012, 4:01 PM CDT
- In force
- 28 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
County Redwood County, MN
The radar
The Sioux Falls radar (KFSD), 138 km from the middle of the area, began a volume at 20:34 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 |
|---|---|---|---|
| Apr 21, 3:45 PM CDT | TORNADO | 7 S Lucan, MN | TIME ESTIMATED BETWEEN 330 AND 400 PM CDT. DAMAGE TO A FLOWER SHOP. |
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 12:00Z, 8.6 hours before the alert went out and 149 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.
121
WFUS53 KMPX 212033
TORMPX
MNC127-212115-
/O.NEW.KMPX.TO.W.0008.120421T2033Z-120421T2115Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
333 PM CDT SAT APR 21 2012
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* TORNADO WARNING FOR...
SOUTH CENTRAL REDWOOD COUNTY IN SOUTHWEST MINNESOTA...
* UNTIL 415 PM CDT
* AT 332 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A
TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS 5 MILES NORTH OF
REVERE...AND MOVING SOUTHEAST AT 25 MPH.
* LOCATIONS IN THE WARNING INCLUDE...
REVERE...
LAMBERTON...
SANBORN...
WALNUT GROVE...
WANDA...
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 4437 9534 4429 9510 4419 9512 4418 9536
4423 9551
TIME...MOT...LOC 2033Z 302DEG 23KT 4428 9536
$$2 follow-up statements
397
WWUS53 KMPX 212050
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
350 PM CDT SAT APR 21 2012
MNC127-212115-
/O.CON.KMPX.TO.W.0008.000000T0000Z-120421T2115Z/
REDWOOD MN-
350 PM CDT SAT APR 21 2012
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL REDWOOD
COUNTY UNTIL 415 PM CDT...
AT 346 PM CDT...LOCAL LAW ENFORCEMENT REPORTED SEVERAL FUNNEL CLOUDS
LIFTING UP AND DOWN OVER SOUTHERN REDWOOD COUNTY. THE STORM
PRODUCING THE FUNNEL CLOUDS WAS LOCATED NEAR LAMBERTON...OR 23 MILES
SOUTH OF REDWOOD FALLS...MOVING SOUTHEAST AT 25 MPH.
LOCATIONS IMPACTED INCLUDE...
SANBORN.
LAMBERTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
YOU SHOULD MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY
BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4420 9539 4432 9520 4429 9510 4419 9512
4418 9536
TIME...MOT...LOC 2048Z 302DEG 23KT 4422 9525
$$670
WWUS53 KMPX 212101
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
401 PM CDT SAT APR 21 2012
MNC127-212116-
/O.CAN.KMPX.TO.W.0008.000000T0000Z-120421T2115Z/
REDWOOD MN-
401 PM CDT SAT APR 21 2012
...THE TORNADO WARNING FOR SOUTH CENTRAL REDWOOD COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.
LAT...LON 4420 9539 4432 9520 4429 9510 4419 9512
4418 9536
TIME...MOT...LOC 2101Z 302DEG 23KT 4417 9516
$$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, 4:09 PM CDT | Tornado Warning | MPX | Chippewa, Kandiyohi, Renville | 36 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.