Alert archive / South Dakota / Tornado Warnings in 2021
Tornado Warning 17, NWS Aberdeen, SD
NWS Aberdeen, SD issued this tornado warning at Oct 9, 2021, 6:14 PM CDT for Marshall County, Roberts County, South Dakota. It was in force for 31 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, 6:14 PM CDT (23:14 UTC)
- Expired
- Oct 9, 2021, 6:45 PM CDT
- In force
- 31 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Marshall County, SD, Roberts County, SD
The radar
The Aberdeen radar (KABR), 99 km from the middle of the area, began a volume at 23:15 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 9, 6:44 PM CDT | TSTM WND GST 70 | 10 S Lidgerwood, SD | TRAINED SPOTTER REPORTS 70MPH WIND GUSTS |
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, 11.2 hours before the alert went out and 135 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.
941
WFUS53 KABR 092314
TORABR
SDC091-109-092345-
/O.NEW.KABR.TO.W.0017.211009T2314Z-211009T2345Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Aberdeen SD
614 PM CDT Sat Oct 9 2021
The National Weather Service in Aberdeen has issued a
* Tornado Warning for...
Northwestern Roberts County in northeastern South Dakota...
Northeastern Marshall County in northeastern South Dakota...
* Until 645 PM CDT.
* At 613 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Sica Hollow State Park, or 12 miles northwest 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...
Veblen and Veblen Flats Housing around 625 PM CDT.
Other locations in the path of this tornadic thunderstorm include
Claire City.
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 4573 9688 4553 9721 4573 9736 4593 9766
4594 9763 4593 9696
TIME...MOT...LOC 2313Z 216DEG 27KT 4576 9727
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Connelly1 follow-up statement
109
WWUS53 KABR 092342
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
642 PM CDT Sat Oct 9 2021
SDC091-109-092351-
/O.EXP.KABR.TO.W.0017.000000T0000Z-211009T2345Z/
Roberts SD-Marshall SD-
642 PM CDT Sat Oct 9 2021
...THE TORNADO WARNING FOR NORTHWESTERN ROBERTS AND NORTHEASTERN
MARSHALL COUNTIES WILL EXPIRE AT 645 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
northeastern South Dakota.
LAT...LON 4573 9688 4553 9721 4573 9736 4593 9766
4594 9763 4593 9696
TIME...MOT...LOC 2341Z 216DEG 27KT 4592 9710
$$
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, 6:15 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.