Alert archive / South Dakota / Tornado Warnings in 2021
Tornado Warning 16, NWS Aberdeen, SD
NWS Aberdeen, SD issued this tornado warning at Oct 9, 2021, 6:07 PM CDT for Day County, Roberts County, South Dakota. It was in force for 23 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
- Oct 9, 2021, 6:07 PM CDT (23:07 UTC)
- Expired
- Oct 9, 2021, 6:30 PM CDT
- In force
- 23 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Tornado
- Observed
- Hail
- 0.75 in
Counties Day County, SD, Roberts County, SD
The radar
The Aberdeen radar (KABR), 97 km from the middle of the area, began a volume at 23:09 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 |
|---|---|---|---|
| Oct 9, 2:56 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 11.1 hours before the alert went out and 114 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
- 4 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 713 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
948
WFUS53 KABR 092307
TORABR
SDC037-109-092330-
/O.NEW.KABR.TO.W.0016.211009T2307Z-211009T2330Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Aberdeen SD
607 PM CDT Sat Oct 9 2021
The National Weather Service in Aberdeen has issued a
* Tornado Warning for...
Southwestern Roberts County in northeastern South Dakota...
East central Day County in northeastern South Dakota...
* Until 630 PM CDT.
* At 606 PM CDT, a confirmed tornado was located over Ortley, or 15
miles east of Webster, moving northeast at 30 mph.
HAZARD...Damaging tornado.
SOURCE...Public confirmed tornado.
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.
* The tornado will be near...
Rudebusch Corner, Enemy Swim Lake and Pickerel Lake Rec Area
around 615 PM CDT.
Finley Heights Housing around 625 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. 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.
&&
LAT...LON 4547 9690 4530 9714 4530 9722 4526 9723
4533 9734 4556 9724 4556 9723 4559 9723
4561 9722
TIME...MOT...LOC 2306Z 216DEG 27KT 4536 9721
TORNADO...OBSERVED
MAX HAIL SIZE...<.75 IN
$$
Connelly1 follow-up statement
732
WWUS53 KABR 092324
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
624 PM CDT Sat Oct 9 2021
SDC037-092334-
/O.CAN.KABR.TO.W.0016.000000T0000Z-211009T2330Z/
Day SD-
624 PM CDT Sat Oct 9 2021
...THE TORNADO WARNING FOR EAST CENTRAL DAY COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
northeastern South Dakota.
LAT...LON 4547 9690 4535 9707 4542 9723 4558 9722
4559 9723 4561 9722
TIME...MOT...LOC 2324Z 216DEG 27KT 4547 9709
$$
SDC109-092330-
/O.CON.KABR.TO.W.0016.000000T0000Z-211009T2330Z/
Roberts SD-
624 PM CDT Sat Oct 9 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
SOUTHWESTERN ROBERTS COUNTY...
At 624 PM CDT, a confirmed tornado was located over Finley Heights
Housing, or 13 miles south of Sisseton, moving northeast at 30 mph.
HAZARD...Damaging tornado.
SOURCE...Public confirmed tornado.
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
southwestern Roberts County, including the following locations...
Lake Traverse Reservation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. 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.
&&
LAT...LON 4547 9690 4535 9707 4542 9723 4558 9722
4559 9723 4561 9722
TIME...MOT...LOC 2324Z 216DEG 27KT 4547 9709
TORNADO...OBSERVED
MAX HAIL SIZE...<.75 IN
$$
ConnellyThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 9, 12:05 PM CDT | Severe Thunderstorm Warning | ABR | Jones, Lyman | 27 min |
| Oct 9, 1:57 PM CDT | Special Weather Statement | ABR | Lyman | 33 min |
| Oct 9, 4:10 PM CDT | Tornado Warning | ABR | Brown, Spink | 35 min |
| Oct 9, 4:30 PM CDT | Tornado Warning | ABR | Brown | 15 min |
| Oct 9, 4:33 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Clark, Codington, Day, Hamlin, Spink | 42 min |
| Oct 9, 4:33 PM CDT | Tornado Warning | ABR | Brown, Day, Spink | 27 min |
| Oct 9, 4:57 PM CDT | Tornado Warning | ABR | Brown, Day, Marshall | 18 min |
| Oct 9, 5:16 PM CDT | Tornado Warning | ABR | Day, Marshall | 29 min |
| Oct 9, 5:17 PM CDT | Tornado Warning | ABR | Brown, Day, Marshall | 28 min |
| Oct 9, 5:18 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Clark, Codington, Day, Grant, Hamlin and 2 more | 57 min |
| Oct 9, 5:44 PM CDT | Tornado Warning | ABR | Brown, Marshall | 31 min |
| Oct 9, 5:47 PM CDT | Tornado Warning | ABR | Day, Marshall, Roberts | 28 min |
| Oct 9, 6:14 PM CDT | Tornado Warning | ABR | Marshall, Roberts | 31 min |
| Oct 9, 6:15 PM CDT | Severe Thunderstorm Warning | ABR | Codington, Day, Deuel, Grant, Hamlin, Marshall and 1 more | 60 min |
| Oct 9, 6:28 PM CDT | Tornado Warning | ABR | Roberts | 21 min |
Nearby
Tornado Warnings in South Dakota, 2021Every tornado warning in 2021Tornadoes 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.