Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 45, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 6, 2021, 1:05 PM CDT for Clay County, Yankton County, South Dakota; Dixon County, Nebraska. It was in force for 25 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 6, 2021, 1:05 PM CDT (18:05 UTC)
- Expired
- Jul 6, 2021, 1:30 PM CDT
- In force
- 25 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Dixon County, NE, Clay County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 95 km from the middle of the area, began a volume at 18:07 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
Omaha, NE (KOAX), launched 12:00Z, 6.1 hours before the alert went out and 177 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1590 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
214
WUUS53 KFSD 061805
SVRFSD
NEC051-SDC027-135-061830-
/O.NEW.KFSD.SV.W.0045.210706T1805Z-210706T1830Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
105 PM CDT Tue Jul 6 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Northwestern Dixon County in northeastern Nebraska...
Southern Clay County in southeastern South Dakota...
Southeastern Yankton County in southeastern South Dakota...
* Until 130 PM CDT.
* At 104 PM CDT, a severe thunderstorm was located near Wynot, or 9
miles southeast of Yankton, moving east at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* This severe thunderstorm will be near...
Meckling around 115 PM CDT.
Vermillion around 125 PM CDT.
Other locations impacted by this severe thunderstorm include Gayville
and St. Helena Boat Dock.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4263 9702 4276 9702 4277 9713 4280 9716
4281 9721 4285 9723 4285 9729 4287 9730
4285 9736 4287 9741 4286 9742 4290 9744
4292 9687 4261 9682
TIME...MOT...LOC 1804Z 252DEG 34KT 4282 9723
HAIL...0.75IN
WIND...60MPH
$$
APT2 follow-up statements
141
WWUS53 KFSD 061824
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
124 PM CDT Tue Jul 6 2021
NEC051-SDC027-135-061830-
/O.CON.KFSD.SV.W.0045.000000T0000Z-210706T1830Z/
Dixon NE-Clay SD-Yankton SD-
124 PM CDT Tue Jul 6 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM CDT
FOR NORTHWESTERN DIXON...SOUTHERN CLAY AND SOUTHEASTERN YANKTON
COUNTIES...
At 124 PM CDT, a severe thunderstorm was located over Meckling, or 10
miles northwest of Vermillion, moving east at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe storm will be near...
Vermillion around 135 PM CDT.
Other locations impacted by this severe thunderstorm include
Gayville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4263 9702 4276 9702 4277 9713 4280 9716
4281 9721 4287 9722 4291 9724 4292 9687
4261 9682
TIME...MOT...LOC 1824Z 266DEG 32KT 4288 9707
HAIL...0.75IN
WIND...60MPH
$$
SG290
WWUS53 KFSD 061830
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
130 PM CDT Tue Jul 6 2021
NEC051-SDC027-135-061839-
/O.EXP.KFSD.SV.W.0045.000000T0000Z-210706T1830Z/
Dixon NE-Clay SD-Yankton SD-
130 PM CDT Tue Jul 6 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN DIXON...SOUTHERN
CLAY AND SOUTHEASTERN YANKTON COUNTIES WILL EXPIRE AT 130 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 and heavy rain are still possible with this thunderstorm.
Remember, a Severe Thunderstorm Warning still remains in effect for
northern Clay county and northeastern Yankton county until 145 PM
CDT.
LAT...LON 4263 9702 4276 9702 4277 9713 4280 9716
4281 9721 4287 9722 4291 9724 4292 9687
4261 9682
TIME...MOT...LOC 1829Z 251DEG 33KT 4288 9707
$$
SGThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 7:16 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha, Moody | 44 min |
| Jul 6, 12:54 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Turner, Yankton | 51 min |
| Jul 6, 1:14 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Turner, Yankton | 31 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2021Severe Thunderstorm Warnings in Nebraska, 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.