Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 74, NWS Aberdeen, SD

July 25, 2021Lyman County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 25, 2021, 6:43 PM CDT for Lyman County, South Dakota. It was in force for 22 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 25, 2021, 6:43 PM CDT (23:43 UTC)
Expired: Jul 25, 2021, 7:05 PM CDT
In force: 22 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Lyman County, SD

The radar

The Aberdeen radar (KABR), 205 km from the middle of the area, began a volume at 23:46 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 12:00Z, 11.7 hours before the alert went out and 159 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2316 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

466 
WUUS53 KABR 252343
SVRABR
SDC085-260045-
/O.NEW.KABR.SV.W.0074.210725T2343Z-210726T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
643 PM CDT Sun Jul 25 2021

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Central Lyman County in central South Dakota...

* Until 745 PM CDT.

* At 643 PM CDT, a severe thunderstorm was located near Fate Dam, or
  7 miles northeast of Presho, moving southeast at 10 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...
  Byre Lake and Kennebec.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Aberdeen.

&&

LAT...LON 4394 10008 4409 9997 4401 9964 4380 9979
TIME...MOT...LOC 2343Z 301DEG 10KT 4398 9994 

HAIL...1.00IN
WIND...60MPH
 
$$

Parkin

1 follow-up statement

254 
WWUS53 KABR 260005
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
705 PM CDT Sun Jul 25 2021

SDC085-260014-
/O.CAN.KABR.SV.W.0074.000000T0000Z-210726T0045Z/
Lyman SD-
705 PM CDT Sun Jul 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LYMAN COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 4394 10008 4409 9997 4401 9964 4380 9979
TIME...MOT...LOC 0003Z 301DEG 10KT 4395 9987 

$$

Parkin

The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 25, 4:33 PM CDT	Special Weather Statement	ABR	Jones	57 min
Jul 25, 5:31 PM CDT	Special Weather Statement	ABR	Hughes	44 min
Jul 25, 5:37 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Stanley	14 min
Jul 25, 5:55 PM CDT	Severe Thunderstorm Warning	ABR	Jones	50 min
Jul 25, 6:03 PM CDT	Severe Thunderstorm Warning	ABR	Hughes	29 min
Jul 25, 6:20 PM CDT	Severe Thunderstorm Warning	ABR	Hand, Hyde	40 min
Jul 25, 6:24 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand, Hyde	51 min
Jul 25, 6:41 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Stanley	25 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2021 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.