Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 46, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 6, 2021, 1:14 PM CDT for Clay County, Turner County, Yankton County, South Dakota. It was in force for 31 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, 1:14 PM CDT (18:14 UTC)
- Expired
- Jul 6, 2021, 1:45 PM CDT
- In force
- 31 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Clay County, SD, Turner County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 68 km from the middle of the area, began a volume at 18:13 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
Omaha, NE (KOAX), launched 12:00Z, 6.2 hours before the alert went out and 204 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.
113
WUUS53 KFSD 061814
SVRFSD
SDC027-125-135-061845-
/O.NEW.KFSD.SV.W.0046.210706T1814Z-210706T1845Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
114 PM CDT Tue Jul 6 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Northern Clay County in southeastern South Dakota...
Northeastern Yankton County in southeastern South Dakota...
Southeastern Turner County in southeastern South Dakota...
* Until 145 PM CDT.
* At 113 PM CDT, severe thunderstorms were located along a line
extending from near Mayfield to near Volin, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Weather instrument. At 12:57 pm, the Yankton surface
observation site reported a wind gust of 60 mph.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Wakonda around 125 PM CDT.
Viborg around 130 PM CDT.
Centerville around 135 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4312 9752 4321 9693 4309 9692 4308 9690
4291 9687 4290 9745
TIME...MOT...LOC 1813Z 268DEG 40KT 4314 9730 4302 9724 4291 9720
HAIL...<.75IN
WIND...60MPH
$$
APT2 follow-up statements
240
WWUS53 KFSD 061832
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
132 PM CDT Tue Jul 6 2021
SDC027-125-135-061845-
/O.CON.KFSD.SV.W.0046.000000T0000Z-210706T1845Z/
Clay SD-Yankton SD-Turner SD-
132 PM CDT Tue Jul 6 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT
FOR NORTHERN CLAY...NORTHEASTERN YANKTON AND SOUTHEASTERN TURNER
COUNTIES...
At 131 PM CDT, severe thunderstorms were located along a line
extending from near Irene to Wakonda to near Meckling, moving east at
35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Centerville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4321 9693 4309 9692 4308 9690 4291 9687
4290 9724 4314 9741
TIME...MOT...LOC 1831Z 266DEG 32KT 4315 9716 4303 9710 4292 9706
HAIL...<.75IN
WIND...60MPH
$$
APT058
WWUS53 KFSD 061844
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
144 PM CDT Tue Jul 6 2021
SDC027-125-135-061854-
/O.EXP.KFSD.SV.W.0046.000000T0000Z-210706T1845Z/
Clay SD-Yankton SD-Turner SD-
144 PM CDT Tue Jul 6 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CLAY...NORTHEASTERN
YANKTON AND SOUTHEASTERN TURNER COUNTIES WILL EXPIRE AT 145 PM CDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose 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 these thunderstorms.
LAT...LON 4321 9693 4309 9692 4308 9690 4291 9687
4290 9724 4314 9741
TIME...MOT...LOC 1844Z 268DEG 40KT 4315 9700 4303 9694 4292 9690
$$
APTThe 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, 1:05 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Yankton | 25 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.