Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 138, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 28, 2021, 7:34 PM CDT for Lyon County, Murray County, Pipestone County, Minnesota. It was in force for 56 min. 5 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
- Aug 28, 2021, 7:34 PM CDT (00:34 UTC)
- Expired
- Aug 28, 2021, 8:30 PM CDT
- In force
- 56 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Lyon County, MN, Murray County, MN, Pipestone County, MN
The radar
The Sioux Falls radar (KFSD), 104 km from the middle of the area, began a volume at 00:35 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 |
|---|---|---|---|
| Aug 28, 7:36 PM CDT | HAIL 3.5 | 2 Ssw Current Lake, MN | PICTURE VIA SOCIAL MEDIA. |
| Aug 28, 7:40 PM CDT | HAIL 2 | 3 Ssw Current Lake, MN | DELAYED REPORT. MEASURED HAIL AT 2.25 INCHES IN DIAMETER. |
| Aug 28, 7:41 PM CDT | HAIL 4 | 2 Ssw Current Lake, MN | DELAYED REPORT. SOCIAL MEDIA REPORTS LARGE HAIL MEASURED AT 3.75 INCHES. |
| Aug 28, 8:21 PM CDT | HAIL 1.75 | 4 N Currie, MN | LOTS OF GOLF BALL SIZED HAIL AND HEAVY RAINFALL 3.40 INCHES SO FAR. |
| Aug 28, 8:39 PM CDT | TSTM WND GST 59 | 3 W Dovray, MN | DELAYED REPORT FROM MESONET STATION MN038 DOVRAY MN-30 MILE POST 49. |
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 |
|---|---|---|---|
| Aug 28, 3:44 PM CDT | Tornado Watch | SPC | 5 hr |
| Aug 28, 3:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.6 hours before the alert went out and 184 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
- 1990 J/kg
- Mixed-layer CIN
- -120 J/kg
- Mixed-layer LCL
- 977 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 252 m²/s²
- 0-3 km storm-relative helicity
- 227 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.0
The text
As transmitted.
211
WUUS53 KFSD 290034
SVRFSD
MNC083-101-117-290130-
/O.NEW.KFSD.SV.W.0138.210829T0034Z-210829T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
734 PM CDT Sat Aug 28 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Southeastern Lyon County in southwestern Minnesota...
Northern Murray County in southwestern Minnesota...
Northeastern Pipestone County in southwestern Minnesota...
* Until 830 PM CDT.
* At 734 PM CDT, a severe thunderstorm was located near Woodstock, or
14 miles east of Pipestone, moving northeast at 20 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* This severe thunderstorm will be near...
Lake Wilson around 740 PM CDT.
Current Lake around 750 PM CDT.
Other locations in the path of this severe thunderstorm include
Balaton, Currie, Lake Shetek State Park and Tracy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for southwestern
Minnesota.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 900 PM CDT for southwestern
Minnesota.
&&
LAT...LON 4427 9559 4420 9559 4419 9555 4403 9548
4394 9607 4416 9622 4434 9562
TIME...MOT...LOC 0034Z 244DEG 19KT 4406 9603
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kalin2 follow-up statements
248
WWUS53 KFSD 290048
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
748 PM CDT Sat Aug 28 2021
MNC083-101-117-290130-
/O.CON.KFSD.SV.W.0138.000000T0000Z-210829T0130Z/
Lyon MN-Murray MN-Pipestone MN-
748 PM CDT Sat Aug 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHEASTERN LYON...NORTHERN MURRAY AND NORTHEASTERN PIPESTONE
COUNTIES...
At 747 PM CDT, a severe thunderstorm was located near Current Lake,
or 10 miles northwest of Slayton, moving northeast at 30 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Currie, Lake Shetek State Park and Tracy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for southwestern
Minnesota.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4427 9559 4420 9559 4419 9555 4403 9548
4394 9607 4416 9622 4434 9562
TIME...MOT...LOC 0047Z 245DEG 27KT 4411 9588
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kalin699
WWUS53 KFSD 290112
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
812 PM CDT Sat Aug 28 2021
MNC117-290121-
/O.CAN.KFSD.SV.W.0138.000000T0000Z-210829T0130Z/
Pipestone MN-
812 PM CDT Sat Aug 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PIPESTONE COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM CDT for southwestern
Minnesota.
LAT...LON 4427 9559 4420 9559 4419 9555 4403 9548
4396 9592 4422 9600 4434 9562
TIME...MOT...LOC 0111Z 244DEG 19KT 4417 9572
$$
MNC083-101-290130-
/O.CON.KFSD.SV.W.0138.000000T0000Z-210829T0130Z/
Lyon MN-Murray MN-
812 PM CDT Sat Aug 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHEASTERN LYON AND NORTHERN MURRAY COUNTIES...
At 811 PM CDT, a severe thunderstorm was located near Lake Shetek
State Park, or 12 miles north of Slayton, moving northeast at 20 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Slayton, Tracy, Balaton, Currie, Dovray, Lake Shetek State Park,
Current Lake, Garvin and Hadley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for southwestern
Minnesota.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4427 9559 4420 9559 4419 9555 4403 9548
4396 9592 4422 9600 4434 9562
TIME...MOT...LOC 0111Z 244DEG 19KT 4417 9572
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KalinThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 7:00 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon, Murray, Pipestone | 45 min |
| Aug 28, 7:23 PM CDT | Severe Thunderstorm Warning | FSD | Rock | 52 min |
| Aug 28, 7:48 PM CDT | Severe Thunderstorm Warning | FSD | Rock | 31 min |
| Aug 28, 8:03 PM CDT | Flash Flood Warning | FSD | Murray, Pipestone | 6 hr |
| Aug 28, 8:06 PM CDT | Severe Thunderstorm Warning | FSD | Nobles, Rock | 54 min |
| Aug 28, 8:17 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Lyon, Murray | 58 min |
| Aug 28, 8:52 PM CDT | Severe Thunderstorm Warning | FSD | Murray, Nobles, Rock | 23 min |
| Aug 28, 9:13 PM CDT | Severe Thunderstorm Warning | FSD | Jackson, Nobles, Rock | 47 min |
| Aug 28, 9:29 PM CDT | Flash Flood Warning | FSD | Murray, Nobles, Pipestone, Rock | 3 hr |
| Aug 28, 10:04 PM CDT | Flash Flood Warning | FSD | Cottonwood, Jackson, Murray, Nobles | 4 hr |
| Aug 28, 10:24 PM CDT | Flash Flood Warning | FSD | Cottonwood, Jackson | 5 hr |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2021Every severe thunderstorm warning in 2021
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.