Alert archive / Minnesota / Tornado Warnings in 2012
Tornado Warning 4, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Apr 15, 2012, 3:41 PM CDT for Lyon County, Minnesota. It was in force for 19 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 15, 2012, 3:41 PM CDT (20:41 UTC)
- Expired
- Apr 15, 2012, 4:00 PM CDT
- In force
- 19 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
County Lyon County, MN
The radar
The Sioux Falls radar (KFSD), 111 km from the middle of the area, began a volume at 20:41 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 15, 4:10 PM CDT | HAIL 1 | 2 N Ghent, MN |
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 |
|---|---|---|---|
| Apr 15, 3:37 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 8.7 hours before the alert went out and 189 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
- 502 m above ground
- 0-6 km bulk shear
- 79 kt
- 0-1 km storm-relative helicity
- 125 m²/s²
- 0-3 km storm-relative helicity
- 222 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
885
WFUS53 KFSD 152041
TORFSD
MNC083-152100-
/O.NEW.KFSD.TO.W.0004.120415T2041Z-120415T2100Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
341 PM CDT SUN APR 15 2012
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* TORNADO WARNING FOR...
LYON COUNTY IN SOUTHWEST MINNESOTA...
* UNTIL 400 PM CDT
* AT 342 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
DANGEROUS STORM WAS LOCATED NEAR RUSSELL...OR 12 MILES SOUTHWEST OF
MARSHALL...AND MOVING NORTHEAST AT 30 MPH.
* THIS TORNADIC STORM WILL BE NEAR...
MARSHALL AND GHENT AROUND 400 PM CDT...
OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE LYND.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. 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 4446 9565 4422 9596 4427 9608 4430 9608
4457 9594
TIME...MOT...LOC 2042Z 216DEG 28KT 4434 9596
$$
LAFLIN2 follow-up statements
590 WWUS53 KFSD 152053 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 353 PM CDT SUN APR 15 2012 MNC083-152100- /O.CON.KFSD.TO.W.0004.000000T0000Z-120415T2100Z/ LYON MN- 353 PM CDT SUN APR 15 2012 ...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL LYON COUNTY UNTIL 400 PM CDT... AT 353 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR CAMDEN STATE PARK...OR 8 MILES WEST OF MARSHALL...MOVING NORTHEAST AT 30 MPH. THIS DANGEROUS STORM WILL BE NEAR... GHENT AROUND 400 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 4431 9592 4435 9601 4457 9594 4446 9565 TIME...MOT...LOC 2053Z 208DEG 26KT 4444 9593 $$ LAFLIN
482 WWUS53 KFSD 152059 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 359 PM CDT SUN APR 15 2012 MNC083-152109- /O.EXP.KFSD.TO.W.0004.000000T0000Z-120415T2100Z/ LYON MN- 359 PM CDT SUN APR 15 2012 ...THE TORNADO WARNING FOR CENTRAL LYON COUNTY WILL EXPIRE AT 400 PM CDT... THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA. LAT...LON 4431 9592 4435 9601 4457 9594 4446 9565 TIME...MOT...LOC 2059Z 208DEG 26KT 4448 9590 $$ LAFLIN
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 2:48 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone | 27 min |
| Apr 15, 3:05 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon, Murray, Pipestone | 25 min |
| Apr 15, 3:38 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon | 37 min |
| Apr 15, 4:14 PM CDT | Tornado Warning | FSD | Lyon | 16 min |
| Apr 15, 5:10 PM CDT | High Wind Warning | FSD | Lincoln, Pipestone, Rock | 11 hr |
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.