Alert archive / South Dakota / Tornado Warnings in 2020
Tornado Warning 18, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Aug 30, 2020, 7:23 PM CDT for Beadle County, South Dakota. It was in force for 17 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
- Aug 30, 2020, 7:23 PM CDT (00:23 UTC)
- Expired
- Aug 30, 2020, 7:40 PM CDT
- In force
- 17 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Tornado
- Observed
- Hail
- 0.75 in
County Beadle County, SD
The radar
The Aberdeen radar (KABR), 132 km from the middle of the area, began a volume at 00:26 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 |
|---|---|---|---|
| Aug 30, 4:55 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 0.4 hours before the alert went out and 70 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
- 5 J/kg
- Mixed-layer CIN
- -191 J/kg
- Mixed-layer LCL
- 914 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -1.2
The text
As transmitted.
795
WFUS53 KFSD 310023
TORFSD
SDC005-310100-
/O.NEW.KFSD.TO.W.0018.200831T0023Z-200831T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
723 PM CDT Sun Aug 30 2020
The National Weather Service in Sioux Falls has issued a
* Tornado Warning for...
Southeastern Beadle County in east central South Dakota...
* Until 800 PM CDT.
* At 723 PM CDT, a confirmed tornado was located near Virgil, or near
Huron, moving east at 35 mph.
HAZARD...Damaging tornado.
SOURCE...Law enforcement 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...
Huron around 730 PM CDT.
Cavour around 745 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 4420 9840 4438 9840 4443 9792 4420 9792
TIME...MOT...LOC 0023Z 265DEG 32KT 4429 9830
TORNADO...OBSERVED
HAIL...<.75IN
$$
VandenBoogart2 follow-up statements
390
WWUS53 KFSD 310037
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
737 PM CDT Sun Aug 30 2020
SDC005-310100-
/O.CON.KFSD.TO.W.0018.000000T0000Z-200831T0100Z/
Beadle SD-
737 PM CDT Sun Aug 30 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR
SOUTHEASTERN BEADLE COUNTY...
At 735 PM CDT, radar continues to indicate broad rotation with a
storm that previously produced a confirmed tornado. This storm is
currently located south of Huron, moving east at 30 mph.
HAZARD...Damaging tornado.
SOURCE...Law enforcement confirmed tornado.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornado will be near...
Cavour around 750 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 4423 9826 4433 9827 4439 9792 4422 9792
TIME...MOT...LOC 0035Z 264DEG 26KT 4429 9818
TORNADO...OBSERVED
HAIL...<.75IN
$$
VandenBoogart593
WWUS53 KFSD 310040
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
740 PM CDT Sun Aug 30 2020
SDC005-310050-
/O.CAN.KFSD.TO.W.0018.000000T0000Z-200831T0100Z/
Beadle SD-
740 PM CDT Sun Aug 30 2020
...THE TORNADO WARNING FOR SOUTHEASTERN BEADLE COUNTY IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until midnight CDT for
east central South Dakota.
LAT...LON 4423 9826 4433 9827 4439 9792 4422 9792
TIME...MOT...LOC 0038Z 265DEG 32KT 4429 9812
$$
VandenBoogartThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 7:06 PM CDT | Tornado Warning | FSD | Beadle | 24 min |
| Aug 30, 7:29 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Jerauld | 46 min |
| Aug 30, 8:12 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Jerauld, Sanborn | 20 min |
| Aug 31, 4:02 AM CDT | Severe Thunderstorm Warning | FSD | Union | 28 min |
Nearby
Tornado Warnings in South Dakota, 2020Every tornado warning in 2020Tornadoes in 2020
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.