Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 1, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Apr 5, 2021, 7:03 PM CDT for McCook County, Minnehaha County, South Dakota. It was in force for 27 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
- Apr 5, 2021, 7:03 PM CDT (00:03 UTC)
- Expired
- Apr 5, 2021, 7:30 PM CDT
- In force
- 27 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties McCook County, SD, Minnehaha County, SD
The radar
The Sioux Falls radar (KFSD), 38 km from the middle of the area, began a volume at 00:07 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
Aberdeen, SD (KABR), launched 00:00Z, 0.1 hours before the alert went out and 168 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
- 3053 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- -70 m²/s²
- 0-3 km storm-relative helicity
- 246 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
210
WUUS53 KFSD 060003
SVRFSD
SDC087-099-060030-
/O.NEW.KFSD.SV.W.0001.210406T0003Z-210406T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
703 PM CDT Mon Apr 5 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Northwestern Minnehaha County in southeastern South Dakota...
East central McCook County in southeastern South Dakota...
* Until 730 PM CDT.
* At 703 PM CDT, a severe thunderstorm was located near Montrose, or
near Lake Vermillion State Recreation Area, moving east at 25 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 Vermillion State Recreation Area and Montrose around 710 PM
CDT.
Humboldt around 725 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4358 9732 4374 9734 4381 9701 4359 9698
TIME...MOT...LOC 0003Z 264DEG 22KT 4367 9725
HAIL...1.00IN
WIND...60MPH
$$
SG2 follow-up statements
240
WWUS53 KFSD 060023
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
723 PM CDT Mon Apr 5 2021
SDC087-060032-
/O.CAN.KFSD.SV.W.0001.000000T0000Z-210406T0030Z/
McCook SD-
723 PM CDT Mon Apr 5 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MCCOOK COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4381 9701 4359 9698 4359 9712 4378 9713
4380 9710
TIME...MOT...LOC 0022Z 258DEG 28KT 4370 9707
$$
SDC099-060030-
/O.CON.KFSD.SV.W.0001.000000T0000Z-210406T0030Z/
Minnehaha SD-
723 PM CDT Mon Apr 5 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR NORTHWESTERN MINNEHAHA COUNTY...
At 722 PM CDT, a severe thunderstorm was located near Humboldt, or 9
miles northeast of Lake Vermillion State Recreation Area, moving east
at 30 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
northwestern Minnehaha County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4381 9701 4359 9698 4359 9712 4378 9713
4380 9710
TIME...MOT...LOC 0022Z 258DEG 28KT 4370 9707
HAIL...1.00IN
WIND...60MPH
$$
SG597
WWUS53 KFSD 060029
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
729 PM CDT Mon Apr 5 2021
SDC099-060038-
/O.EXP.KFSD.SV.W.0001.000000T0000Z-210406T0030Z/
Minnehaha SD-
729 PM CDT Mon Apr 5 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MINNEHAHA COUNTY
WILL EXPIRE AT 730 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds up to 50 mph are still possible with this thunderstorm.
LAT...LON 4381 9701 4359 9698 4359 9712 4378 9713
4380 9710
TIME...MOT...LOC 0028Z 264DEG 22KT 4370 9703
$$
SGThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 5, 7:39 PM CDT | Severe Thunderstorm Warning | FSD | Moody | 36 min |
| Apr 5, 7:49 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson, Turner | 26 min |
| Apr 5, 8:44 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 31 min |
| Apr 5, 9:04 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha, Turner | 26 min |
| Apr 5, 9:27 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha | 33 min |
| Apr 5, 9:48 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 27 min |
| Apr 6, 9:39 AM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 10 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.