Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 91, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 8, 2021, 12:56 AM CDT for Clark County, South Dakota. It was in force for 49 min. 2 reports 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
- Aug 8, 2021, 12:56 AM CDT (05:56 UTC)
- Expired
- Aug 8, 2021, 1:45 AM CDT
- In force
- 49 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Clark County, SD
The radar
The Aberdeen radar (KABR), 76 km from the middle of the area, began a volume at 05:56 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 |
|---|---|---|---|
| Aug 8, 1:20 AM CDT | HAIL 0.25 | 2 N Clark, SD | |
| Aug 8, 1:22 AM CDT | HAIL 0.7 | 3 W Hillcrest Colony, SD | DIME SIZE HAIL AND MEASURED 43 MPH WINDS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 5.9 hours before the alert went out and 47 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
- 2053 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1417 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.0
The text
As transmitted.
249
WUUS53 KABR 080556
SVRABR
SDC025-080645-
/O.NEW.KABR.SV.W.0091.210808T0556Z-210808T0645Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
1256 AM CDT Sun Aug 8 2021
The National Weather Service in Aberdeen has issued a
* Severe Thunderstorm Warning for...
Central Clark County in northeastern South Dakota...
* Until 145 AM CDT.
* At 1255 AM CDT, a severe thunderstorm was located near Raymond, or
8 miles northwest of Clark, moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will be near...
Clark around 115 AM CDT.
Other locations in the path of this severe thunderstorm include
Hillcrest Colony and Garden City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4488 9796 4502 9794 4504 9756 4479 9759
TIME...MOT...LOC 0555Z 274DEG 19KT 4495 9789
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Serr2 follow-up statements
643
WWUS53 KABR 080617
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
117 AM CDT Sun Aug 8 2021
SDC025-080645-
/O.CON.KABR.SV.W.0091.000000T0000Z-210808T0645Z/
Clark SD-
117 AM CDT Sun Aug 8 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 AM CDT
FOR CENTRAL CLARK COUNTY...
At 117 AM CDT, a severe thunderstorm was located over Hillcrest
Colony, or near Clark, moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Hillcrest Colony and Garden City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4485 9783 4502 9781 4504 9756 4479 9759
TIME...MOT...LOC 0617Z 274DEG 19KT 4494 9773
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Serr143
WWUS53 KABR 080637
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
137 AM CDT Sun Aug 8 2021
SDC025-080646-
/O.EXP.KABR.SV.W.0091.000000T0000Z-210808T0645Z/
Clark SD-
137 AM CDT Sun Aug 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CLARK COUNTY WILL
EXPIRE AT 145 AM 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. However small hail, gusty winds and heavy rain
are still possible with this thunderstorm.
LAT...LON 4485 9783 4502 9781 4504 9756 4479 9759
TIME...MOT...LOC 0636Z 274DEG 19KT 4493 9761
$$
SerrThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 7:05 PM CDT | Severe Thunderstorm Warning | ABR | Brown, McPherson | 40 min |
| Aug 7, 7:26 PM CDT | Severe Thunderstorm Warning | ABR | Brown | 49 min |
| Aug 7, 8:09 PM CDT | Special Weather Statement | ABR | Brown | 36 min |
| Aug 7, 8:18 PM CDT | Special Weather Statement | ABR | Brown | 27 min |
| Aug 7, 9:07 PM CDT | Special Weather Statement | ABR | Brown | 23 min |
| Aug 7, 10:09 PM CDT | Special Weather Statement | ABR | Brown | 36 min |
| Aug 7, 10:53 PM CDT | Special Weather Statement | ABR | Spink | 37 min |
| Aug 7, 11:01 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Spink | 44 min |
| Aug 7, 11:25 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Clark, Day, Spink | 50 min |
| Aug 8, 3:37 AM CDT | Areal Flood Warning | ABR | Clark, Day | 5 hr |
| Aug 8, 5:02 AM CDT | Areal Flood Warning | ABR | Clark, Codington, Grant | 4 hr |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2021Every severe thunderstorm warning 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.