Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 155, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 31, 2021, 12:15 AM CDT for Hanson County, Hutchinson County, South Dakota. It was in force for 45 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 31, 2021, 12:15 AM CDT (05:15 UTC)
- Expired
- Aug 31, 2021, 1:00 AM CDT
- In force
- 45 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
Counties Hanson County, SD, Hutchinson County, SD
The radar
The Sioux Falls radar (KFSD), 90 km from the middle of the area, began a volume at 05:15 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 30, 9:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 5.3 hours before the alert went out and 178 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
- 205 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 1953 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
958 WUUS53 KFSD 310515 SVRFSD SDC061-067-310600- /O.NEW.KFSD.SV.W.0155.210831T0515Z-210831T0600Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Sioux Falls SD 1215 AM CDT Tue Aug 31 2021 The National Weather Service in Sioux Falls has issued a * Severe Thunderstorm Warning for... Southern Hanson County in southeastern South Dakota... Central Hutchinson County in southeastern South Dakota... * Until 100 AM CDT. * At 1215 AM CDT, a severe thunderstorm was located near Milltown, or near Parkston, moving northeast at 15 mph. HAZARD...Half dollar size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * This severe thunderstorm will be near... Milltown around 1235 AM CDT. Other locations in the path of this severe thunderstorm include Clayton. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4328 9788 4337 9794 4355 9772 4332 9757 TIME...MOT...LOC 0515Z 239DEG 13KT 4336 9786 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.25 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ APT
2 follow-up statements
703
WWUS53 KFSD 310527
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
1227 AM CDT Tue Aug 31 2021
SDC061-067-310600-
/O.CON.KFSD.SV.W.0155.000000T0000Z-210831T0600Z/
Hanson SD-Hutchinson SD-
1227 AM CDT Tue Aug 31 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM CDT
FOR SOUTHERN HANSON AND NORTH CENTRAL HUTCHINSON COUNTIES...
At 1227 AM CDT, a severe thunderstorm was located over Milltown, or 9
miles east of Parkston, moving northeast at 20 mph.
HAZARD...Golf ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect damage
to roofs, siding, windows, and vehicles.
This severe storm will be near...
Clayton around 1245 AM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4333 9784 4341 9789 4355 9772 4337 9760
TIME...MOT...LOC 0527Z 229DEG 19KT 4341 9781
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
APT887
WWUS53 KFSD 310551
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
1251 AM CDT Tue Aug 31 2021
SDC061-067-310601-
/O.EXP.KFSD.SV.W.0155.000000T0000Z-210831T0600Z/
Hanson SD-Hutchinson SD-
1251 AM CDT Tue Aug 31 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN HANSON AND NORTH
CENTRAL HUTCHINSON COUNTIES WILL EXPIRE AT 100 AM 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 are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 500 AM CDT for
southeastern South Dakota.
LAT...LON 4333 9784 4341 9789 4355 9772 4337 9760
TIME...MOT...LOC 0551Z 239DEG 13KT 4345 9772
$$
APTThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 7:29 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Union | 46 min |
| Aug 30, 7:57 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson, McCook, Minnehaha, Turner | 48 min |
| Aug 30, 11:19 PM CDT | Severe Thunderstorm Warning | FSD | Beadle, Jerauld, Sanborn | 41 min |
| Aug 31, 12:00 AM CDT | Flash Flood Warning | FSD | Aurora, Brule | 3 hr |
| Aug 31, 12:05 AM CDT | Severe Thunderstorm Warning | FSD | Aurora, Davison, Douglas | 40 min |
| Aug 31, 1:26 AM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix, Gregory | 49 min |
| Aug 31, 2:14 AM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix | 31 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.