Alert archive / South Dakota / Tornado Warnings in 2017
Tornado Warning 24, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jul 11, 2017, 9:28 PM CDT for Brookings County, South Dakota. It was in force for 32 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
- Jul 11, 2017, 9:28 PM CDT (02:28 UTC)
- Expired
- Jul 11, 2017, 10:00 PM CDT
- In force
- 32 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.5 in
County Brookings County, SD
The radar
The Sioux Falls radar (KFSD), 86 km from the middle of the area, began a volume at 02:29 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 11, 6:52 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 2.5 hours before the alert went out and 141 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
- 586 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 3131 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
859
WFUS53 KFSD 120228
TORFSD
SDC011-120300-
/O.NEW.KFSD.TO.W.0024.170712T0228Z-170712T0300Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
928 PM CDT TUE JUL 11 2017
The National Weather Service in Sioux Falls has issued a
* Tornado Warning for...
Central Brookings County in east central South Dakota...
* Until 1000 PM CDT
* At 928 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Brookings, moving southeast at 15 mph.
HAZARD...Tornado and ping pong ball size hail.
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...
Brookings around 955 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Bushnell.
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 4440 9687 4443 9680 4432 9663 4426 9678
TIME...MOT...LOC 0228Z 328DEG 12KT 4438 9680
TORNADO...RADAR INDICATED
HAIL...1.50IN
$$
Ferguson1 follow-up statement
620
WWUS53 KFSD 120248
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
948 PM CDT TUE JUL 11 2017
SDC011-120300-
/O.CON.KFSD.TO.W.0024.000000T0000Z-170712T0300Z/
Brookings SD-
948 PM CDT TUE JUL 11 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR CENTRAL
BROOKINGS COUNTY...
At 947 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Brookings, moving southeast at 15 mph.
HAZARD...Tornado and ping pong ball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
central Brookings County, including the following locations:
Bushnell.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!
&&
LAT...LON 4435 9680 4438 9672 4432 9663 4428 9673
TIME...MOT...LOC 0247Z 321DEG 12KT 4434 9673
TORNADO...RADAR INDICATED
HAIL...1.50IN
$$
FergusonThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 7:33 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 42 min |
| Jul 11, 8:08 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Davison | 37 min |
| Jul 11, 8:35 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Davison | 40 min |
| Jul 11, 8:36 PM CDT | Severe Thunderstorm Warning | FSD | Hanson, McCook, Miner, Sanborn | 24 min |
| Jul 11, 8:56 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 34 min |
| Jul 11, 9:08 PM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, Hutchinson | 37 min |
| Jul 11, 9:19 PM CDT | Tornado Warning | FSD | Brookings | 26 min |
| Jul 11, 9:25 PM CDT | Severe Thunderstorm Warning | FSD | Hanson, Hutchinson, McCook | 35 min |
| Jul 11, 9:29 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 31 min |
| Jul 11, 9:46 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Kingsbury | 29 min |
| Jul 11, 9:57 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Kingsbury | 33 min |
| Jul 11, 10:00 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 30 min |
| Jul 11, 10:27 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 33 min |
| Jul 11, 10:29 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 31 min |
| Jul 11, 10:48 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 27 min |
| Jul 11, 11:10 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Moody | 35 min |
Nearby
Tornado Warnings in South Dakota, 2017Every tornado warning in 2017Tornadoes in 2017
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.