Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 182, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 25, 2011, 8:23 PM CDT for Rock County, Minnesota; Minnehaha County, South Dakota. It was in force for 37 min. 3 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
- Jul 25, 2011, 8:23 PM CDT (01:23 UTC)
- Expired
- Jul 25, 2011, 9:00 PM CDT
- In force
- 37 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Rock County, MN, Minnehaha County, SD
The radar
The Sioux Falls radar (KFSD), 24 km from the middle of the area, began a volume at 01:26 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 |
|---|---|---|---|
| Jul 25, 8:30 PM CDT | TSTM WND GST 65 | Garretson, SD | |
| Jul 25, 8:42 PM CDT | HAIL 1 | Garretson, SD | |
| Jul 25, 8:45 PM CDT | TSTM WND DMG | Garretson, SD | 2-3 INCH DIAMETER TREE BRANCHES BLOWN DOWN BY SEVERE THUNDERSTORM WIND GUSTS. RAINFALL ESTIMATED AT 1-2 INCHES IS CAUSING STREET FLOODING. QUARTER SIZED HAIL EARLIER STOPPED, BUT NOW PENNY SIZED HAIL IS BEGINNING. |
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, 1.4 hours before the alert went out and 209 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
- 2164 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
848 WUUS53 KFSD 260123 SVRFSD MNC133-SDC099-260200- /O.NEW.KFSD.SV.W.0182.110726T0123Z-110726T0200Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 823 PM CDT MON JUL 25 2011 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN ROCK COUNTY IN SOUTHWEST MINNESOTA... EASTERN MINNEHAHA COUNTY IN SOUTHEAST SOUTH DAKOTA... * UNTIL 900 PM CDT * AT 823 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SHERMAN...OR 15 MILES NORTHWEST OF LUVERNE...AND MOVING SOUTH AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... PALISADES STATE PARK AROUND 835 PM CDT... BEAVER CREEK AND BRANDON AROUND 850 PM CDT... VALLEY SPRINGS AROUND 855 PM CDT... 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 4354 9631 4354 9661 4380 9664 4382 9635 TIME...MOT...LOC 0123Z 352DEG 18KT 4374 9647 WIND...HAIL 60MPH 1.00IN $$ CJ
2 follow-up statements
421 WWUS53 KFSD 260133 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 833 PM CDT MON JUL 25 2011 MNC133-SDC099-260200- /O.CON.KFSD.SV.W.0182.000000T0000Z-110726T0200Z/ ROCK MN-MINNEHAHA SD- 833 PM CDT MON JUL 25 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN MINNEHAHA AND WESTERN ROCK COUNTIES UNTIL 900 PM CDT... AT 832 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR GARRETSON...OR 14 MILES WEST OF LUVERNE...MOVING SOUTH AT 20 MPH. AT 830 PM CDT WIND GUSTS TO 65 MPH WERE REPORTED IN GARRETSON WITH THIS STORM. THE SEVERE THUNDERSTORM WILL BE NEAR... BRANDON AROUND 850 PM CDT... VALLEY SPRINGS AND BEAVER CREEK AROUND 855 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WIND. THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4354 9631 4354 9661 4380 9664 4382 9635 TIME...MOT...LOC 0132Z 352DEG 18KT 4370 9649 WIND...HAIL 60MPH <1.00IN $$ CJ
491 WWUS53 KFSD 260145 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 845 PM CDT MON JUL 25 2011 MNC133-SDC099-260200- /O.CON.KFSD.SV.W.0182.000000T0000Z-110726T0200Z/ ROCK MN-MINNEHAHA SD- 845 PM CDT MON JUL 25 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN MINNEHAHA AND WESTERN ROCK COUNTIES UNTIL 900 PM CDT... AT 846 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR PALISADES STATE PARK...OR 14 MILES NORTHEAST OF SIOUX FALLS...MOVING SOUTH AT 20 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... BRANDON AND BEAVER CREEK AROUND 855 PM CDT... VALLEY SPRINGS AROUND 900 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS IF YOU ARE IN THE PATH OF THIS STORM. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4377 9663 4381 9635 4354 9631 4354 9661 TIME...MOT...LOC 0146Z 350DEG 18KT 4365 9653 WIND...HAIL 60MPH 1.00IN $$ CJ
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 7:24 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone | 36 min |
| Jul 25, 7:53 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone, Rock | 37 min |
| Jul 25, 8:53 PM CDT | Severe Thunderstorm Warning | FSD | Rock | 37 min |
| Jul 25, 9:04 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone | 41 min |
| Jul 25, 9:36 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone | 24 min |
| Jul 25, 10:29 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Turner | 31 min |
| Jul 25, 10:54 PM CDT | Severe Thunderstorm Warning | FSD | Turner | 36 min |
| Jul 26, 3:17 AM CDT | Flash Flood Warning | FSD | Beadle, Kingsbury | 4 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.