Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 102, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 24, 2021, 10:00 AM CDT for 4 counties in Minnesota. It was in force for 45 min. 1 report 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 24, 2021, 10:00 AM CDT (15:00 UTC)
- Expired
- Aug 24, 2021, 10:45 AM CDT
- In force
- 45 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Cottonwood County, MN, Jackson County, MN, Nobles County, MN, Rock County, MN
The radar
The Sioux Falls radar (KFSD), 118 km from the middle of the area, began a volume at 14:59 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 24, 10:46 AM CDT | HAIL 0.7 | 8 E Round Lake, MN | DICKENSON COUNTY EM REPORTED DIME TO NICKLE SIZED HAIL NEAR SIOUX VALLEY, MN (ABOUT 6 MILES NORTH OF LAKEPARK IA). |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 3.0 hours before the alert went out and 182 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
- 1192 J/kg
- Mixed-layer CIN
- -180 J/kg
- Mixed-layer LCL
- 1234 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 178 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.9
The text
As transmitted.
557
WUUS53 KFSD 241500
SVRFSD
MNC033-063-105-133-241545-
/O.NEW.KFSD.SV.W.0102.210824T1500Z-210824T1545Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
1000 AM CDT Tue Aug 24 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Southeastern Rock County in southwestern Minnesota...
Jackson County in southwestern Minnesota...
Nobles County in southwestern Minnesota...
Southeastern Cottonwood County in southwestern Minnesota...
* Until 1045 AM CDT.
* At 959 AM CDT, severe thunderstorms were located along a line
extending from near Butterfield to near Heron Lake to 6 miles
southeast of Rushmore, moving east at 30 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...
Worthington, Windom, Jackson In Jackson County, Mountain Lake,
Lakefield, Adrian, Bergen, Heron Lake, Brewster, Ellsworth, Round
Lake, Rushmore, Bingham Lake, Kilen Woods State Park, Bigelow,
Okabena, Alpha, Wilder and Delft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4350 9500 4350 9618 4370 9586 4382 9544
4410 9507 4410 9486 4367 9485
TIME...MOT...LOC 1459Z 263DEG 27KT 4399 9484 4379 9524 4354 9572
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BP1 follow-up statement
500
WWUS53 KFSD 241523
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
1023 AM CDT Tue Aug 24 2021
MNC133-241532-
/O.CAN.KFSD.SV.W.0102.000000T0000Z-210824T1545Z/
Rock MN-
1023 AM CDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ROCK COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 4350 9500 4350 9590 4375 9568 4382 9543
4386 9508 4400 9497 4403 9486 4367 9485
TIME...MOT...LOC 1522Z 259DEG 23KT 4383 9490 4371 9526 4354 9559
$$
MNC033-063-105-241545-
/O.CON.KFSD.SV.W.0102.000000T0000Z-210824T1545Z/
Jackson MN-Nobles MN-Cottonwood MN-
1023 AM CDT Tue Aug 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR JACKSON...EASTERN NOBLES AND SOUTHEASTERN COTTONWOOD COUNTIES...
At 1022 AM CDT, severe thunderstorms were located along a line
extending from near Bergen to near Lakefield to near Round Lake,
moving east at 25 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...
Worthington, Windom, Jackson In Jackson County, Mountain Lake,
Lakefield, Bergen, Heron Lake, Brewster, Round Lake, Rushmore,
Bingham Lake, Kilen Woods State Park, Bigelow, Okabena, Alpha and
Wilder.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4350 9500 4350 9590 4375 9568 4382 9543
4386 9508 4400 9497 4403 9486 4367 9485
TIME...MOT...LOC 1522Z 259DEG 23KT 4383 9490 4371 9526 4354 9559
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BPThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 8:16 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Murray | 44 min |
| Aug 24, 8:59 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Murray | 61 min |
| Aug 24, 9:43 AM CDT | Severe Thunderstorm Warning | FSD | Nobles | 47 min |
| Aug 24, 10:44 AM CDT | Severe Thunderstorm Warning | FSD | Jackson, Nobles | 30 min |
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.