Alert archive / South Dakota / Tornado Warnings in 2023
Tornado Warning 21, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Sep 23, 2023, 3:59 PM CDT for Brookings County, South Dakota. It was in force for 46 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 23, 2023, 3:59 PM CDT (20:59 UTC)
- Expired
- Sep 23, 2023, 4:45 PM CDT
- In force
- 46 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Brookings County, SD
The radar
The Sioux Falls radar (KFSD), 97 km from the middle of the area, began a volume at 20:58 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 23, 4:05 PM CDT | TORNADO | 4 Ene Bruce, SD | Multiple storm chasers report tornado northeast of Bruce. Appears to be in an open field. |
| Sep 23, 4:16 PM CDT | TORNADO | 6 Ne Bruce, SD | Storm chaser reported a brief touchdown in a soybean field. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 9.0 hours before the alert went out and 134 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
- 719 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
269
WFUS53 KFSD 232059
TORFSD
SDC011-232145-
/O.NEW.KFSD.TO.W.0021.230923T2059Z-230923T2145Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
359 PM CDT Sat Sep 23 2023
The National Weather Service in Sioux Falls has issued a
* Tornado Warning for...
North central Brookings County in east central South Dakota...
* Until 445 PM CDT.
* At 358 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Bruce, or 8 miles south of Estelline, moving north
at 10 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This tornadic thunderstorm will remain over mainly rural areas of
north central Brookings County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Sioux Falls.
&&
LAT...LON 4440 9680 4442 9692 4454 9690 4454 9666
TIME...MOT...LOC 2058Z 189DEG 7KT 4446 9684
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
BP1 follow-up statement
724
WWUS53 KFSD 232127
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
427 PM CDT Sat Sep 23 2023
SDC011-232145-
/O.CON.KFSD.TO.W.0021.000000T0000Z-230923T2145Z/
Brookings SD-
427 PM CDT Sat Sep 23 2023
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR NORTH
CENTRAL BROOKINGS COUNTY...
At 427 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Estelline, moving north at 10 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
north central Brookings County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.
&&
LAT...LON 4446 9677 4446 9689 4454 9690 4454 9668
TIME...MOT...LOC 2127Z 189DEG 7KT 4452 9683
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
BPThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 23, 4:12 PM CDT | Tornado Warning | FSD | Brookings | 33 min |
Nearby
Tornado Warnings in South Dakota, 2023Every tornado warning in 2023Tornadoes in 2023
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.