Alert archive / South Dakota / Tornado Warnings in 2021
Tornado Warning 18, NWS Aberdeen, SD
NWS Aberdeen, SD issued this tornado warning at Oct 9, 2021, 6:28 PM CDT for Roberts County, South Dakota. It was in force for 21 min. 1 report 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
- Oct 9, 2021, 6:28 PM CDT (23:28 UTC)
- Expired
- Oct 9, 2021, 6:49 PM CDT
- In force
- 21 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Roberts County, SD
The radar
The Aberdeen radar (KABR), 119 km from the middle of the area, began a volume at 23:29 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 |
|---|---|---|---|
| Oct 9, 6:36 PM CDT | TSTM WND DMG | 3 Nw Peever, SD | 30 FOOT TRAILER PULLED BY A PICK UP TRUCK OVERTURNED ON INTERSTATE 29. TIME ESTIMATED BY RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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, 11.5 hours before the alert went out and 138 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.
362
WFUS53 KABR 092328
TORABR
SDC109-100000-
/O.NEW.KABR.TO.W.0018.211009T2328Z-211010T0000Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Aberdeen SD
628 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...
* Until 700 PM CDT.
* At 628 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Finley Heights Housing, or 15 miles south of
Sisseton, moving northeast at 30 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 dangerous storm will be near...
Agency Village around 640 PM CDT.
Peever and Peever Flats Housing around 645 PM CDT.
Other locations in the path of this tornadic thunderstorm include
Browns Valley and Dakota Connection & Casino.
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.
&&
LAT...LON 4564 9684 4560 9685 4554 9678 4551 9676
4534 9697 4545 9716 4567 9697
TIME...MOT...LOC 2328Z 216DEG 27KT 4543 9703
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Connelly1 follow-up statement
413
WWUS53 KABR 092349
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
649 PM CDT Sat Oct 9 2021
SDC109-092359-
/O.CAN.KABR.TO.W.0018.000000T0000Z-211010T0000Z/
Roberts SD-
649 PM CDT Sat Oct 9 2021
...THE TORNADO WARNING FOR SOUTHWESTERN ROBERTS COUNTY IS
CANCELLED...
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
west central Minnesota...and northeastern South Dakota.
LAT...LON 4564 9684 4560 9685 4554 9678 4551 9676
4534 9697 4545 9716 4567 9697
TIME...MOT...LOC 2346Z 216DEG 27KT 4556 9690
$$
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, 6:07 PM CDT | Tornado Warning | ABR | Day, Roberts | 23 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 |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.