Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 61, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 23, 2021, 9:11 PM CDT for Aurora County, Davison County, Hanson County, South Dakota. It was in force for 49 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
- Jul 23, 2021, 9:11 PM CDT (02:11 UTC)
- Expired
- Jul 23, 2021, 10:00 PM CDT
- In force
- 49 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Aurora County, SD, Davison County, SD, Hanson County, SD
The radar
The Sioux Falls radar (KFSD), 115 km from the middle of the area, began a volume at 02:13 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 nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 2.2 hours before the alert went out and 133 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
- 3002 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 1613 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 6.9
The text
As transmitted.
619 WUUS53 KFSD 240211 SVRFSD SDC003-035-061-240300- /O.NEW.KFSD.SV.W.0061.210724T0211Z-210724T0300Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Sioux Falls SD 911 PM CDT Fri Jul 23 2021 The National Weather Service in Sioux Falls has issued a * Severe Thunderstorm Warning for... Northern Davison County in southeastern South Dakota... East central Aurora County in south central South Dakota... Northwestern Hanson County in southeastern South Dakota... * Until 1000 PM CDT. * At 910 PM CDT, a severe thunderstorm was located over Mount Vernon, or 10 miles west of Mitchell, moving east at 25 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * This severe thunderstorm will be near... Loomis around 930 PM CDT. Mitchell around 935 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4364 9834 4378 9836 4385 9788 4366 9784 TIME...MOT...LOC 0210Z 260DEG 23KT 4371 9824 HAIL...<.75IN WIND...60MPH $$ Chapman
3 follow-up statements
900
WWUS53 KFSD 240223
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
923 PM CDT Fri Jul 23 2021
SDC003-240232-
/O.CAN.KFSD.SV.W.0061.000000T0000Z-210724T0300Z/
Aurora SD-
923 PM CDT Fri Jul 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL AURORA COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4364 9828 4379 9830 4385 9788 4366 9784
TIME...MOT...LOC 0222Z 258DEG 27KT 4374 9807
$$
SDC035-061-240300-
/O.CON.KFSD.SV.W.0061.000000T0000Z-210724T0300Z/
Davison SD-Hanson SD-
923 PM CDT Fri Jul 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR NORTHERN DAVISON AND NORTHWESTERN HANSON COUNTIES...
At 922 PM CDT, a severe thunderstorm was located just west of
Mitchell, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe thunderstorm will remain over mainly rural areas of
northern Davison and northwestern Hanson Counties, but will impact
areas near Loomis.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4364 9828 4379 9830 4385 9788 4366 9784
TIME...MOT...LOC 0222Z 258DEG 27KT 4374 9807
HAIL...<.75IN
WIND...60MPH
$$
Chapman415
WWUS53 KFSD 240247
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
947 PM CDT Fri Jul 23 2021
SDC035-240256-
/O.CAN.KFSD.SV.W.0061.000000T0000Z-210724T0300Z/
Davison SD-
947 PM CDT Fri Jul 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN DAVISON COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4368 9794 4383 9797 4385 9788 4366 9784
TIME...MOT...LOC 0246Z 260DEG 23KT 4377 9786
$$
SDC061-240300-
/O.CON.KFSD.SV.W.0061.000000T0000Z-210724T0300Z/
Hanson SD-
947 PM CDT Fri Jul 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR NORTHWESTERN HANSON COUNTY...
At 946 PM CDT, a severe thunderstorm was located near Fulton, or 9
miles east of Mitchell, moving east at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe thunderstorm will remain over mainly rural areas of
northwestern Hanson County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4368 9794 4383 9797 4385 9788 4366 9784
TIME...MOT...LOC 0246Z 260DEG 23KT 4377 9786
HAIL...<.75IN
WIND...60MPH
$$
Chapman704
WWUS53 KFSD 240251
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
951 PM CDT Fri Jul 23 2021
SDC061-240301-
/O.EXP.KFSD.SV.W.0061.000000T0000Z-210724T0300Z/
Hanson SD-
951 PM CDT Fri Jul 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN HANSON COUNTY
WILL EXPIRE AT 1000 PM CDT...
The severe thunderstorm which prompted the warning has weakened and
moved out of the warned area. Therefore, the warning will be allowed
to expire. However, gusty winds of 35 to 45 mph are still possible
with this thunderstorm.
LAT...LON 4368 9794 4383 9797 4385 9788 4366 9784
TIME...MOT...LOC 0251Z 260DEG 23KT 4377 9784
$$
ChapmanThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 9:06 PM CDT | Severe Thunderstorm Warning | FSD | Kingsbury | 39 min |
| Jul 23, 9:15 PM CDT | Severe Thunderstorm Warning | FSD | Kingsbury | 30 min |
Nearby
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.