Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 82, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 21, 2011, 8:39 PM CDT for Pipestone County, Rock County, Minnesota; Minnehaha County, Moody County, South Dakota. It was in force for 36 min. 2 reports 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
- May 21, 2011, 8:39 PM CDT (01:39 UTC)
- Expired
- May 21, 2011, 9:15 PM CDT
- In force
- 36 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 70.0 mph
Counties Pipestone County, MN, Rock County, MN, Minnehaha County, SD, Moody County, SD
The radar
The Sioux Falls radar (KFSD), 33 km from the middle of the area, began a volume at 01:41 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 |
|---|---|---|---|
| May 21, 8:45 PM CDT | TSTM WND GST 60 | 10 Nw Luverne, MN | POWER OUT. ALSO QUARTER SIZE HAIL. |
| May 21, 8:45 PM CDT | HAIL 1 | 10 Nw Luverne, MN | ALSO ESTIMATED 60 MPH WIND GUSTS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 1.7 hours before the alert went out and 201 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
- 361 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 1036 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- -50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
592 WUUS53 KFSD 220139 SVRFSD MNC117-133-SDC099-101-220215- /O.NEW.KFSD.SV.W.0082.110522T0139Z-110522T0215Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 839 PM CDT SAT MAY 21 2011 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN PIPESTONE COUNTY IN SOUTHWEST MINNESOTA... ROCK COUNTY IN SOUTHWEST MINNESOTA... EASTERN MINNEHAHA COUNTY IN SOUTHEAST SOUTH DAKOTA... SOUTHEASTERN MOODY COUNTY IN EAST CENTRAL SOUTH DAKOTA... * UNTIL 915 PM CDT * AT 839 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS LOCATED NEAR VALLEY SPRINGS...OR 13 MILES EAST OF SIOUX FALLS...AND MOVING NORTH AT 45 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... PALISADES STATE PARK AND LUVERNE AROUND 845 PM CDT... SHERMAN...GARRETSON AND BLUE MOUNDS STATE PARK AROUND 850 PM CDT... JASPER AND HARDWICK AROUND 900 PM CDT... TROSKY AROUND 905 PM CDT... EDGERTON AROUND 910 PM CDT... OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE IHLEN. 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 DAMAGING WIND. THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4397 9656 4388 9609 4351 9625 4358 9663 TIME...MOT...LOC 0139Z 193DEG 39KT 4361 9645 WIND...HAIL 70MPH <1.00IN $$ HANKO
2 follow-up statements
336 WWUS53 KFSD 220152 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 852 PM CDT SAT MAY 21 2011 MNC117-133-SDC099-101-220215- /O.CON.KFSD.SV.W.0082.000000T0000Z-110522T0215Z/ PIPESTONE MN-ROCK MN-MOODY SD-MINNEHAHA SD- 852 PM CDT SAT MAY 21 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN MINNEHAHA...SOUTHEASTERN MOODY...NORTHWESTERN ROCK AND SOUTHWESTERN PIPESTONE COUNTIES UNTIL 915 PM CDT... AT 851 PM CDT...A SEVERE THUNDERSTORM WAS REPORTED...PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS LOCATED NEAR SHERMAN...OR 11 MILES WEST OF LUVERNE...MOVING NORTH AT 45 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... JASPER AND HARDWICK AROUND 900 PM CDT... TROSKY AROUND 905 PM CDT... EDGERTON AROUND 910 PM CDT... OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE IHLEN. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WIND. THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4397 9656 4388 9609 4361 9624 4370 9658 TIME...MOT...LOC 0151Z 193DEG 39KT 4374 9641 WIND...HAIL 70MPH <1.00IN $$ HANKO
875 WWUS53 KFSD 220216 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 916 PM CDT SAT MAY 21 2011 MNC117-133-SDC099-101-220226- /O.EXP.KFSD.SV.W.0082.000000T0000Z-110522T0215Z/ PIPESTONE MN-ROCK MN-MOODY SD-MINNEHAHA SD- 916 PM CDT SAT MAY 21 2011 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MINNEHAHA... SOUTHEASTERN MOODY...NORTHERN ROCK AND SOUTHWESTERN PIPESTONE COUNTIES HAS EXPIRED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF THE WARNED AREA...HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 4397 9656 4388 9609 4361 9624 4370 9658 TIME...MOT...LOC 0152Z 193DEG 39KT 4375 9641 $$ HANKO
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 8:16 PM CDT | Severe Thunderstorm Warning | FSD | Rock | 29 min |
| May 21, 8:29 PM CDT | Severe Thunderstorm Warning | FSD | Jackson | 31 min |
| May 21, 8:57 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson | 33 min |
| May 21, 9:17 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson | 43 min |
| May 21, 9:32 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood | 13 min |
| May 21, 9:58 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood | 32 min |
| May 21, 7:05 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Turner | 25 min |
| May 21, 7:28 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Lincoln, Turner | 32 min |
| May 21, 7:38 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Union | 37 min |
| May 21, 7:49 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Union | 26 min |
| May 22, 10:52 AM CDT | River Flood Warning | FSD | Minnehaha, Moody | 22 hr |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2011Severe Thunderstorm Warnings in South Dakota, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.