Alert archive / South Dakota / Tornado Warnings in 2017
Tornado Warning 21, NWS Aberdeen, SD
NWS Aberdeen, SD issued this tornado warning at Sep 19, 2017, 9:24 PM CDT for Clark County, Codington County, Day County, South Dakota. It was in force for 36 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
- Sep 19, 2017, 9:24 PM CDT (02:24 UTC)
- Expired
- Sep 19, 2017, 10:00 PM CDT
- In force
- 36 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Clark County, SD, Codington County, SD, Day County, SD
The radar
The Aberdeen radar (KABR), 85 km from the middle of the area, began a volume at 02:22 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 |
|---|---|---|---|
| Sep 19, 9:26 PM CDT | TORNADO | Bradley, SD | BRIEF TOUCHDOWN REPORTED BY WXNATION TV METEOROLOGIST. |
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 |
|---|---|---|---|
| Sep 19, 3:37 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 2.4 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
- 2563 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 1127 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 229 m²/s²
- 0-3 km storm-relative helicity
- 239 m²/s²
- Significant tornado parameter
- 2.6
- Supercell composite
- 16.8
The text
As transmitted.
521
WFUS53 KABR 200224
TORABR
SDC025-029-037-200300-
/O.NEW.KABR.TO.W.0021.170920T0224Z-170920T0300Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Aberdeen SD
924 PM CDT TUE SEP 19 2017
The National Weather Service in Aberdeen has issued a
* Tornado Warning for...
Southeastern Day County in northeastern South Dakota...
Northeastern Clark County in northeastern South Dakota...
Northwestern Codington County in northeastern South Dakota...
* Until 1000 PM CDT
* At 923 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Bradley, or 12 miles northeast of Clark, moving
northeast at 30 mph.
HAZARD...Tornado and quarter size hail.
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...
Swan Lake around 930 PM CDT.
Wallace around 935 PM CDT.
Florence and Grass Lake around 945 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.
Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!
&&
LAT...LON 4482 9764 4507 9783 4529 9744 4506 9710
TIME...MOT...LOC 0223Z 237DEG 27KT 4504 9758
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
Connelly2 follow-up statements
953
WWUS53 KABR 200248
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
948 PM CDT TUE SEP 19 2017
SDC025-200257-
/O.CAN.KABR.TO.W.0021.000000T0000Z-170920T0300Z/
Clark SD-
948 PM CDT TUE SEP 19 2017
...THE TORNADO WARNING FOR NORTHEASTERN CLARK COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.
A tornado watch remains in effect until midnight CDT for northeastern
South Dakota.
LAT...LON 4507 9712 4496 9732 4512 9750 4515 9749
4515 9750 4525 9738
TIME...MOT...LOC 0247Z 237DEG 27KT 4514 9736
$$
SDC029-037-200300-
/O.CON.KABR.TO.W.0021.000000T0000Z-170920T0300Z/
Day SD-Codington SD-
948 PM CDT TUE SEP 19 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
SOUTHEASTERN DAY AND NORTHWESTERN CODINGTON COUNTIES...
At 947 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Grass Lake, or 15 miles southeast of Webster, 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 tornadic thunderstorm will remain over mainly rural areas of
southeastern Day and northwestern Codington Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!
&&
LAT...LON 4507 9712 4496 9732 4512 9750 4515 9749
4515 9750 4525 9738
TIME...MOT...LOC 0247Z 237DEG 27KT 4514 9736
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Connelly942
WWUS53 KABR 200258
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
958 PM CDT TUE SEP 19 2017
SDC029-037-200306-
/O.EXP.KABR.TO.W.0021.000000T0000Z-170920T0300Z/
Day SD-Codington SD-
958 PM CDT TUE SEP 19 2017
...THE TORNADO WARNING FOR SOUTHEASTERN DAY AND NORTHWESTERN
CODINGTON COUNTIES WILL EXPIRE AT 1000 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.
A tornado watch remains in effect until midnight CDT for northeastern
South Dakota.
Remember, a Tornado Warning still remains in effect for parts of
southeast Day and north central Codington counties until 1030 PM CDT.
LAT...LON 4507 9712 4496 9732 4512 9750 4515 9749
4515 9750 4525 9738
TIME...MOT...LOC 0256Z 237DEG 27KT 4517 9729
$$
ConnellyThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 19, 7:01 PM CDT | Tornado Warning | ABR | Campbell, Edmunds, McPherson, Walworth | 29 min |
| Sep 19, 7:23 PM CDT | Tornado Warning | ABR | McPherson | 20 min |
| Sep 19, 7:29 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Marshall | 46 min |
| Sep 19, 7:40 PM CDT | Tornado Warning | ABR | Spink | 35 min |
| Sep 19, 7:46 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Spink | 44 min |
| Sep 19, 7:52 PM CDT | Tornado Warning | ABR | McPherson | 24 min |
| Sep 19, 8:12 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Marshall | 33 min |
| Sep 19, 8:13 PM CDT | Tornado Warning | ABR | Clark, Spink | 32 min |
| Sep 19, 8:23 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Day, Marshall, Spink | 37 min |
| Sep 19, 8:28 PM CDT | Tornado Warning | ABR | Clark, Spink | 32 min |
| Sep 19, 8:41 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Marshall | 34 min |
| Sep 19, 8:53 PM CDT | Tornado Warning | ABR | Clark, Codington, Day, Spink | 37 min |
| Sep 19, 9:54 PM CDT | Tornado Warning | ABR | Codington, Day, Grant, Roberts | 15 min |
| Sep 19, 10:43 PM CDT | Areal Flood Warning | ABR | Codington | 3 hr |
| Sep 19, 10:49 PM CDT | Severe Thunderstorm Warning | ABR | Grant, Roberts | 41 min |
| Sep 19, 11:26 PM CDT | Severe Thunderstorm Warning | ABR | Grant, Roberts | 19 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.