Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 112, NWS Bismarck, ND

July 20, 2021Golden Valley County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 20, 2021, 4:58 PM MDT for Golden Valley County, North Dakota. It was in force for 34 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 20, 2021, 4:58 PM MDT (22:58 UTC)
Expired: Jul 20, 2021, 5:32 PM MDT
In force: 34 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Golden Valley County, ND

The radar

The Bismarck radar (KBIS), 242 km from the middle of the area, began a volume at 23:01 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 20, 5:10 PM MDT	TSTM WND GST 53	4 Nne Golva, ND	MESONET STATION 320599 3 NNE GOLVA (NDAWN).

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.0 hours before the alert went out and 247 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: 35 J/kg
Mixed-layer CIN: -512 J/kg
Mixed-layer LCL: 1645 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -65 m²/s²
0-3 km storm-relative helicity: -38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

027 
WUUS53 KBIS 202258
SVRBIS
NDC033-202345-
/O.NEW.KBIS.SV.W.0112.210720T2258Z-210720T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
458 PM MDT Tue Jul 20 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Southern Golden Valley County in southwestern North Dakota...

* Until 545 PM MDT.

* At 458 PM MDT, a severe thunderstorm was located over Golva, or 11
  miles south of Beach, moving northeast at 20 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Sentinel Butte.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4707 10404 4705 10385 4685 10364 4663 10400
      4666 10405
TIME...MOT...LOC 2258Z 227DEG 18KT 4676 10401 

HAIL...1.50IN
WIND...60MPH
 
$$

HAMILTON

2 follow-up statements

146 
WWUS53 KBIS 202320
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
520 PM MDT Tue Jul 20 2021

NDC033-202345-
/O.CON.KBIS.SV.W.0112.000000T0000Z-210720T2345Z/
Golden Valley ND-
520 PM MDT Tue Jul 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MDT
FOR WEST CENTRAL GOLDEN VALLEY COUNTY...

At 519 PM MDT, a severe thunderstorm was located over Beach, moving
northeast at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail are possible. A 
         report of dime sized hail in Beach has been reported.

SOURCE...Radar indicated.

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

Locations impacted include...
Beach and Sentinel Butte. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4687 10402 4688 10403 4699 10404 4706 10396
      4705 10385 4694 10373
TIME...MOT...LOC 2319Z 232DEG 21KT 4694 10395 

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

Telken

424 
WWUS53 KBIS 202332
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
532 PM MDT Tue Jul 20 2021

NDC033-202341-
/O.CAN.KBIS.SV.W.0112.000000T0000Z-210720T2345Z/
Golden Valley ND-
532 PM MDT Tue Jul 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL GOLDEN VALLEY
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 4687 10402 4688 10403 4699 10404 4706 10396
      4705 10385 4694 10373
TIME...MOT...LOC 2330Z 227DEG 18KT 4698 10388 

$$

Telken

The office that day

Everything else NWS Bismarck, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 6:19 PM MDT	Severe Thunderstorm Warning	BIS	McHenry, McLean, Sheridan	18 min
Jul 19, 7:46 PM MDT	Special Weather Statement	BIS	Pierce	29 min
Jul 19, 10:29 PM MDT	Special Weather Statement	BIS	Rolette	31 min
Jul 20, 2:47 AM MDT	Red Flag Warning	BIS	Billings, Bowman, Golden Valley, Slope	19 hr
Jul 20, 4:48 PM MDT	Special Weather Statement	BIS	Golden Valley	27 min
Jul 20, 5:42 PM MDT	Special Weather Statement	BIS	Bowman	33 min

Nearby

Severe Thunderstorm Warnings in North 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.