Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 39, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Apr 9, 2011, 9:45 PM CDT for Lyon County, Minnesota. It was in force for 30 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 9, 2011, 9:45 PM CDT (02:45 UTC)
- Expired
- Apr 9, 2011, 10:15 PM CDT
- In force
- 30 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 58.0 mph
County Lyon County, MN
The radar
The Sioux Falls radar (KFSD), 123 km from the middle of the area, began a volume at 02:45 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 9, 7:42 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 9, 7:47 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 2.8 hours before the alert went out and 176 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
- 612 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 355 m²/s²
- 0-3 km storm-relative helicity
- 550 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.2
The text
As transmitted, in the capitals the NWS used until 2016.
094
WUUS53 KFSD 100245
SVRFSD
MNC083-100315-
/O.NEW.KFSD.SV.W.0039.110410T0245Z-110410T0315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
945 PM CDT SAT APR 9 2011
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
LYON COUNTY IN SOUTHWEST MINNESOTA...
* UNTIL 1015 PM CDT
* AT 945 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR
SIZE HAIL. THIS STORM WAS LOCATED NEAR FLORENCE...OR 16 MILES
SOUTHWEST OF MARSHALL...AND MOVING NORTHEAST AT 45 MPH.
AT 925 PM HAIL TO THE SIZE OF PING PONG BALLS WAS REPORTED IN
RUSSEL WITH THIS STORM.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
CAMDEN STATE PARK AROUND 950 PM CDT...
MARSHALL...GHENT AND TRACY AROUND 1000 PM CDT...
OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE LYND.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!
&&
LAT...LON 4454 9558 4420 9559 4420 9608 4455 9608
4462 9560
TIME...MOT...LOC 0245Z 231DEG 41KT 4431 9597
WIND...HAIL <58MPH 1.25IN
$$
LIEBL2 follow-up statements
294
WWUS53 KFSD 100303
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1003 PM CDT SAT APR 9 2011
MNC083-100315-
/O.CON.KFSD.SV.W.0039.000000T0000Z-110410T0315Z/
LYON MN-
1003 PM CDT SAT APR 9 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR LYON COUNTY
UNTIL 1015 PM CDT...
AT 1004 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL. THIS STORM WAS LOCATED 6 MILES EAST OF CAMDEN STATE PARK...OR
9 MILES SOUTH OF MARSHALL...MOVING NORTHEAST AT 45 MPH.
THIS SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF LYON
COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 4454 9558 4420 9559 4420 9608 4455 9608
4462 9560
TIME...MOT...LOC 0304Z 233DEG 40KT 4435 9575
WIND...HAIL <58MPH 1.00IN
$$
LIEBL191
WWUS53 KFSD 100312
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1012 PM CDT SAT APR 9 2011
MNC083-100322-
/O.EXP.KFSD.SV.W.0039.000000T0000Z-110410T0315Z/
LYON MN-
1012 PM CDT SAT APR 9 2011
...THE SEVERE THUNDERSTORM WARNING FOR LYON COUNTY WILL EXPIRE AT
1015 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY...HOWEVER SMALL HAIL AND HEAVY RAIN ARE STILL POSSIBLE WITH
THIS THUNDERSTORM.
LAT...LON 4454 9558 4420 9559 4420 9608 4455 9608
4462 9560
TIME...MOT...LOC 0312Z 233DEG 40KT 4440 9565
$$
LIEBLThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 8:55 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon, Murray, Pipestone | 50 min |
| Apr 9, 9:17 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone, Rock | 43 min |
| Apr 9, 9:54 PM CDT | Severe Thunderstorm Warning | FSD | Murray, Nobles, Pipestone, Rock | 51 min |
| Apr 9, 11:16 PM CDT | Severe Thunderstorm Warning | FSD | Jackson, Nobles | 21 min |
| Apr 10, 3:12 AM CDT | River Flood Warning | FSD | Lyon | 55 hr |
| Apr 10, 10:42 AM CDT | River Flood Warning | FSD | Lyon | 22 hr |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2011Every severe thunderstorm warning in 2011
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.