Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 50, NWS Aberdeen, SD

July 5, 2021Hughes County, Stanley County, Sully County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 5, 2021, 12:14 PM CDT for Hughes County, Stanley County, Sully County, South Dakota. It was in force for 46 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: Jul 5, 2021, 12:14 PM CDT (17:14 UTC)
Expired: Jul 5, 2021, 1:00 PM CDT
In force: 46 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hughes County, SD, Stanley County, SD, Sully County, SD

The radar

The Rapid City radar (KUDX), 183 km from the middle of the area, began a volume at 17:16 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
Jul 5, 12:15 PM CDT	HAIL 1.75	2 Wnw Chantler Creek Re, SD

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 12:00Z, 5.2 hours before the alert went out and 179 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: 1844 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

695 
WUUS53 KABR 051714
SVRABR
SDC065-117-119-051800-
/O.NEW.KABR.SV.W.0050.210705T1714Z-210705T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
1214 PM CDT Mon Jul 5 2021

The National Weather Service in Aberdeen has issued a

* Severe Thunderstorm Warning for...
  Southwestern Sully County in central South Dakota...
  Central Stanley County in central South Dakota...
  Northwestern Hughes County in central South Dakota...

* Until 100 PM CDT/noon MDT/.

* At 1214 PM CDT/1114 AM MDT/, a severe thunderstorm was located over
  southern Lake Oahe, or 14 miles northwest of Fort Pierre, moving
  east at 15 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...
  Oahe Mission Rec Area, Okobojo Point Rec Area, Spring Creek Rec 
  Area, Cow Creek Rec Area, West Shore Rec Area and southern Lake 
  Oahe.

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 4439 10068 4457 10072 4465 10038 4425 10042
TIME...MOT...LOC 1714Z 274DEG 11KT 4448 10062 

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

Dorn

2 follow-up statements

923 
WWUS53 KABR 051734
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
1234 PM CDT Mon Jul 5 2021

SDC065-117-119-051800-
/O.CON.KABR.SV.W.0050.000000T0000Z-210705T1800Z/
Sully SD-Stanley SD-Hughes SD-
1234 PM CDT Mon Jul 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM
CDT/NOON MDT/ FOR SOUTH CENTRAL SULLY...CENTRAL STANLEY AND
NORTHWESTERN HUGHES COUNTIES...

At 1233 PM CDT/1133 AM MDT/, a severe thunderstorm was located over
southern Lake Oahe, or 10 miles northwest of Fort Pierre, moving east
at 15 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Okobojo Point Rec Area, Spring Creek Rec Area, Cow Creek Rec Area,
West Shore Rec Area, Oahe Mission Rec Area and Chantier Creek
Recreation Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near southern Lake Oahe, get away from the water and move 
indoors or inside a vehicle. remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4444 10063 4455 10064 4465 10038 4434 10041
TIME...MOT...LOC 1733Z 270DEG 12KT 4448 10053 

HAIL...1.25IN
WIND...60MPH
 
$$

Dorn

487 
WWUS53 KABR 051754
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
1254 PM CDT Mon Jul 5 2021

SDC065-117-119-051804-
/O.EXP.KABR.SV.W.0050.000000T0000Z-210705T1800Z/
Sully SD-Stanley SD-Hughes SD-
1254 PM CDT Mon Jul 5 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SULLY...CENTRAL
STANLEY AND NORTHWESTERN HUGHES COUNTIES WILL EXPIRE AT 100 PM
CDT/NOON MDT/...
                
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 will be allowed to expire.  However small hail
and heavy rain are still possible with this thunderstorm.

LAT...LON 4444 10063 4455 10064 4465 10038 4434 10041
TIME...MOT...LOC 1754Z 274DEG 11KT 4448 10045 

$$

Dorn

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 11:15 AM CDT	Special Weather Statement	ABR	Stanley	30 min
Jul 5, 11:48 AM CDT	Special Weather Statement	ABR	Stanley	27 min
Jul 5, 12:48 PM CDT	Special Weather Statement	ABR	Hughes	42 min
Jul 5, 1:30 PM CDT	Special Weather Statement	ABR	Lyman	45 min
Jul 5, 1:50 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	40 min
Jul 5, 2:30 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	30 min
Jul 5, 3:13 PM CDT	Areal Flood Warning	ABR	Lyman	6 hr
Jul 5, 3:18 PM CDT	Areal Flood Warning	ABR	Jones	6 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.