Alert archive / Minnesota / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 21, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 20, 2024, 9:37 PM CDT for Cottonwood County, Jackson County, Minnesota. It was in force for 53 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
- May 20, 2024, 9:37 PM CDT (02:37 UTC)
- Expired
- May 20, 2024, 10:30 PM CDT
- In force
- 53 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Cottonwood County, MN, Jackson County, MN
The radar
The Sioux Falls radar (KFSD), 131 km from the middle of the area, began a volume at 02:38 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 |
|---|---|---|---|
| May 20, 6:45 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 2.6 hours before the alert went out and 173 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
- 1078 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1148 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.4
The text
As transmitted.
195
WUUS53 KFSD 210237
SVRFSD
MNC033-063-210330-
/O.NEW.KFSD.SV.W.0021.240521T0237Z-240521T0330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
937 PM CDT Mon May 20 2024
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Northern Jackson County in southwestern Minnesota...
Southeastern Cottonwood County in southwestern Minnesota...
* Until 1030 PM CDT.
* At 936 PM CDT, a severe thunderstorm was located near Heron Lake,
or 14 miles northeast of Worthington, moving east at 25 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...
Heron Lake around 940 PM CDT.
Lakefield around 950 PM CDT.
Windom and Kilen Woods State Park around 955 PM CDT.
Other locations in the path of this severe thunderstorm include
Bergen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4368 9545 4385 9545 4390 9486 4371 9485
4366 9486 4366 9487
TIME...MOT...LOC 0236Z 264DEG 22KT 4377 9539
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
IG2 follow-up statements
955
WWUS53 KFSD 210309
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
1009 PM CDT Mon May 20 2024
MNC033-063-210330-
/O.CON.KFSD.SV.W.0021.000000T0000Z-240521T0330Z/
Jackson MN-Cottonwood MN-
1009 PM CDT Mon May 20 2024
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR NORTHERN JACKSON AND SOUTHEASTERN COTTONWOOD COUNTIES...
At 1009 PM CDT, a severe thunderstorm was located near Lakefield, or
8 miles southwest of Windom, moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Windom, Lakefield, Bergen and Kilen Woods State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4368 9536 4386 9536 4390 9486 4371 9485
4366 9486
TIME...MOT...LOC 0309Z 273DEG 15KT 4376 9519
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
IG039
WWUS53 KFSD 210323
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
1023 PM CDT Mon May 20 2024
MNC033-063-210333-
/O.EXP.KFSD.SV.W.0021.000000T0000Z-240521T0330Z/
Jackson MN-Cottonwood MN-
1023 PM CDT Mon May 20 2024
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN JACKSON AND
SOUTHEASTERN COTTONWOOD COUNTIES WILL EXPIRE AT 1030 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However, heavy
rain is still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until midnight CDT for
southwestern Minnesota.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Sioux Falls.
&&
LAT...LON 4368 9536 4386 9536 4390 9486 4371 9485
4366 9486
TIME...MOT...LOC 0323Z 268DEG 17KT 4377 9514
$$
IGThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 9:03 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson, Murray, Nobles | 57 min |
| May 21, 2:38 AM CDT | Wind Advisory | FSD | Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 2 more | 19 hr |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2024Every severe thunderstorm warning in 2024
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.