Alert archive / South Dakota / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 239, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 25, 2017, 6:36 PM CDT for 4 counties in South Dakota. It was in force for 39 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 25, 2017, 6:36 PM CDT (23:36 UTC)
- Expired
- Aug 25, 2017, 7:15 PM CDT
- In force
- 39 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 70.0 mph
Counties Beadle County, SD, Kingsbury County, SD, Miner County, SD, Sanborn County, SD
The radar
The Sioux Falls radar (KFSD), 120 km from the middle of the area, began a volume at 23:39 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 25, 3:38 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 11.6 hours before the alert went out and 90 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
- 742 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
979
WUUS53 KFSD 252336
SVRFSD
SDC005-077-097-111-260015-
/O.NEW.KFSD.SV.W.0239.170825T2336Z-170826T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
636 PM CDT FRI AUG 25 2017
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Southwestern Kingsbury County in east central South Dakota...
Northern Sanborn County in east central South Dakota...
Southeastern Beadle County in east central South Dakota...
Northwestern Miner County in east central South Dakota...
* Until 715 PM CDT
* At 636 PM CDT, a severe thunderstorm was located 8 miles north of
Forestburg, or 16 miles south of Huron, moving east at 40 mph.
HAZARD...70 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
* This severe thunderstorm will be near,
Carthage around 705 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4397 9829 4421 9828 4443 9759 4412 9759
TIME...MOT...LOC 2336Z 247DEG 34KT 4414 9813
HAIL...1.25IN
WIND...70MPH
$$
MJF2 follow-up statements
819
WWUS53 KFSD 252354
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
654 PM CDT FRI AUG 25 2017
SDC005-077-097-111-260015-
/O.CON.KFSD.SV.W.0239.000000T0000Z-170826T0015Z/
Kingsbury SD-Sanborn SD-Beadle SD-Miner SD-
654 PM CDT FRI AUG 25 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR SOUTHWESTERN KINGSBURY...NORTHERN SANBORN...SOUTHEASTERN BEADLE
AND NORTHWESTERN MINER COUNTIES...
At 654 PM CDT, the most intense part of a severe thunderstorm was
located 8 miles west of Carthage, or 20 miles southeast of Huron,
moving east at 40 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe storm will be near...
Carthage around 705 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4397 9829 4421 9828 4443 9759 4412 9759
TIME...MOT...LOC 2354Z 253DEG 34KT 4417 9789
HAIL...1.25IN
WIND...60MPH
$$
MJF905
WWUS53 KFSD 260016
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
716 PM CDT FRI AUG 25 2017
SDC005-077-097-111-260026-
/O.EXP.KFSD.SV.W.0239.000000T0000Z-170826T0015Z/
Kingsbury SD-Sanborn SD-Beadle SD-Miner SD-
716 PM CDT FRI AUG 25 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN KINGSBURY...
NORTHERN SANBORN...SOUTHEASTERN BEADLE AND NORTHWESTERN MINER
COUNTIES HAS EXPIRED...
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 has been allowed to expire. However small hail
and gusty winds up to 50 mph are still possible with this
thunderstorm through 730 PM CDT.
A severe thunderstorm watch remains in effect until 1100 PM CDT for
east central South Dakota.
LAT...LON 4397 9829 4421 9828 4443 9759 4412 9759
TIME...MOT...LOC 0016Z 247DEG 34KT 4425 9763
$$
MJFThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 12:07 PM CDT | Flash Flood Warning | FSD | Union | 113 min |
| Aug 25, 5:32 PM CDT | Severe Thunderstorm Warning | FSD | Brule | 58 min |
| Aug 25, 5:42 PM CDT | Severe Thunderstorm Warning | FSD | Brule, Charles Mix, Gregory | 63 min |
| Aug 25, 6:48 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Davison, Jerauld, Sanborn | 57 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2017Every severe thunderstorm warning in 2017
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.