Alert archive / South Dakota / Tornado Warnings in 2017
Tornado Warning 37, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Sep 15, 2017, 7:30 PM CDT for Brookings County, Kingsbury County, South Dakota. It was in force for 30 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
- Sep 15, 2017, 7:30 PM CDT (00:30 UTC)
- Expired
- Sep 15, 2017, 8:00 PM CDT
- In force
- 30 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Brookings County, SD, Kingsbury County, SD
The radar
The Sioux Falls radar (KFSD), 83 km from the middle of the area, began a volume at 00:30 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 nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 0.5 hours before the alert went out and 128 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
- 553 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 564 m²/s²
- 0-3 km storm-relative helicity
- 636 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
The text
As transmitted.
017
WFUS53 KFSD 160030
TORFSD
SDC011-077-160100-
/O.NEW.KFSD.TO.W.0037.170916T0030Z-170916T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
730 PM CDT FRI SEP 15 2017
The National Weather Service in Sioux Falls has issued a
* Tornado Warning for...
Southeastern Kingsbury County in east central South Dakota...
Southwestern Brookings County in east central South Dakota...
* Until 800 PM CDT
* At 729 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Sinai, or 14 miles west of Brookings, moving
northeast at 30 mph.
HAZARD...Tornado.
SOURCE...Weather spotters reported funnel cloud.
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...
Volga around 750 PM CDT.
Oakwood State Park around 800 PM CDT.
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 4421 9702 4428 9716 4449 9705 4436 9679
TIME...MOT...LOC 0029Z 220DEG 25KT 4427 9708
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
JM1 follow-up statement
042
WWUS53 KFSD 160050
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
750 PM CDT FRI SEP 15 2017
SDC011-077-160100-
/O.EXP.KFSD.TO.W.0037.000000T0000Z-170916T0100Z/
Kingsbury SD-Brookings SD-
750 PM CDT FRI SEP 15 2017
...THE TORNADO WARNING FOR SOUTHEASTERN KINGSBURY AND SOUTHWESTERN
BROOKINGS COUNTIES WILL EXPIRE AT 800 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning will be allowed to expire.
LAT...LON 4421 9702 4428 9716 4449 9705 4436 9679
TIME...MOT...LOC 0050Z 220DEG 25KT 4438 9696
$$
JMNearby
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.