Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 85, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 6, 2021, 11:10 PM CDT for Brule County, South Dakota. It was in force for 35 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
- Aug 6, 2021, 11:10 PM CDT (04:10 UTC)
- Expired
- Aug 6, 2021, 11:45 PM CDT
- In force
- 35 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Brule County, SD
The radar
The Aberdeen radar (KABR), 204 km from the middle of the area, began a volume at 04:10 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 |
|---|---|---|---|
| Aug 6, 10:08 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 4.2 hours before the alert went out and 148 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
- 466 J/kg
- Mixed-layer CIN
- -132 J/kg
- Mixed-layer LCL
- 1480 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
432
WUUS53 KFSD 070410
SVRFSD
SDC015-070445-
/O.NEW.KFSD.SV.W.0085.210807T0410Z-210807T0445Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
1110 PM CDT Fri Aug 6 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Western Brule County in south central South Dakota...
* Until 1145 PM CDT.
* At 1109 PM CDT, a severe thunderstorm was located near Dude Ranch,
or 9 miles southwest of Chamberlain, moving northeast at 35 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.
* This severe thunderstorm will be near...
Lake Francis Case around 1115 PM CDT.
Other locations in the path of this severe thunderstorm include
Chamberlain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 4370 9941 4375 9942 4377 9941 4380 9936
4386 9931 4390 9936 4393 9935 4394 9893
4365 9914 4357 9933 4364 9936 4366 9938
4366 9946 4368 9947
TIME...MOT...LOC 0409Z 233DEG 30KT 4371 9949
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Weisser2 follow-up statements
117
WWUS53 KFSD 070426
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
1126 PM CDT Fri Aug 6 2021
SDC015-070445-
/O.CON.KFSD.SV.W.0085.000000T0000Z-210807T0445Z/
Brule SD-
1126 PM CDT Fri Aug 6 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR WESTERN BRULE COUNTY...
At 1125 PM CDT, a severe thunderstorm was located near Chamberlain,
moving northeast at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe thunderstorm will remain over mainly rural areas of
western Brule County, including the following locations... Pukwana.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4370 9941 4375 9942 4377 9941 4380 9936
4386 9931 4390 9936 4393 9935 4394 9893
4365 9914 4357 9933 4364 9936 4366 9938
4366 9946 4368 9947
TIME...MOT...LOC 0425Z 233DEG 30KT 4379 9934
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Weisser545
WWUS53 KFSD 070441
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
1141 PM CDT Fri Aug 6 2021
SDC015-070451-
/O.EXP.KFSD.SV.W.0085.000000T0000Z-210807T0445Z/
Brule SD-
1141 PM CDT Fri Aug 6 2021
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN BRULE COUNTY WILL
EXPIRE AT 1145 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 gusty
winds are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
south central South Dakota.
LAT...LON 4370 9941 4375 9942 4377 9941 4380 9936
4386 9931 4390 9936 4393 9935 4394 9893
4365 9914 4357 9933 4364 9936 4366 9938
4366 9946 4368 9947
TIME...MOT...LOC 0441Z 216DEG 34KT 4384 9922
$$
WeisserNearby
Severe Thunderstorm Warnings in South Dakota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.