Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 168, NWS Bismarck, ND

September 2, 2021Billings County, Golden Valley County, Slope County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Sep 2, 2021, 9:04 AM MDT for Billings County, Golden Valley County, Slope County, North Dakota. It was in force for 41 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 2, 2021, 9:04 AM MDT (15:04 UTC)
Expired: Sep 2, 2021, 9:45 AM MDT
In force: 41 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Billings County, ND, Golden Valley County, ND, Slope County, ND

The radar

The Bismarck radar (KBIS), 213 km from the middle of the area, began a volume at 15:04 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 2, 9:08 AM MDT	HAIL 1	9 Ene Three V Crossing, ND	MUCH WIND-DRIVEN HAIL FELL. MOST WAS SMALLER BUT SOME WAS THE SIZE OF QUARTERS. A SKYLIGHT ON A HOME WAS BROKEN. TIME ESTIMATED FROM RADAR.

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, 3.1 hours before the alert went out and 218 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: 422 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 889 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: -44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

643 
WUUS53 KBIS 021504
SVRBIS
NDC007-033-087-021545-
/O.NEW.KBIS.SV.W.0168.210902T1504Z-210902T1545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
904 AM MDT Thu Sep 2 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Southeastern Golden Valley County in southwestern North Dakota...
  Southwestern Billings County in southwestern North Dakota...
  North central Slope County in southwestern North Dakota...

* Until 945 AM MDT.

* At 904 AM MDT, a severe thunderstorm was located 16 miles northwest
  of Amidon, 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.

* This severe thunderstorm will remain over mainly rural areas of
  southeastern Golden Valley, southwestern Billings and north central
  Slope Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4670 10370 4671 10360 4674 10326 4652 10326
      4659 10367 4663 10369
TIME...MOT...LOC 1504Z 269DEG 13KT 4664 10357 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SCHILD

3 follow-up statements

708 
WWUS53 KBIS 021513
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
913 AM MDT Thu Sep 2 2021

NDC007-033-087-021545-
/O.CON.KBIS.SV.W.0168.000000T0000Z-210902T1545Z/
Golden Valley ND-Billings ND-Slope ND-
913 AM MDT Thu Sep 2 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM MDT
FOR SOUTHEASTERN GOLDEN VALLEY...SOUTHWESTERN BILLINGS AND NORTH
CENTRAL SLOPE COUNTIES...

At 912 AM MDT, a severe thunderstorm was located 14 miles northwest
of Amidon, moving east at 15 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.

This severe thunderstorm will remain over mainly rural areas of
southeastern Golden Valley, southwestern Billings and north central
Slope Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4670 10370 4671 10360 4674 10326 4652 10326
      4659 10367 4663 10369
TIME...MOT...LOC 1512Z 269DEG 13KT 4664 10352 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SCHILD

836 
WWUS53 KBIS 021522
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
922 AM MDT Thu Sep 2 2021

NDC033-021532-
/O.CAN.KBIS.SV.W.0168.000000T0000Z-210902T1545Z/
Golden Valley ND-
922 AM MDT Thu Sep 2 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GOLDEN VALLEY
COUNTY IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4674 10326 4652 10326 4661 10360 4671 10360
TIME...MOT...LOC 1522Z 269DEG 13KT 4664 10347 

$$

NDC007-087-021545-
/O.CON.KBIS.SV.W.0168.000000T0000Z-210902T1545Z/
Billings ND-Slope ND-
922 AM MDT Thu Sep 2 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM MDT
FOR SOUTHWESTERN BILLINGS AND NORTH CENTRAL SLOPE COUNTIES...

At 922 AM MDT, a severe thunderstorm was located 12 miles northwest
of Amidon, 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.

This severe thunderstorm will remain over mainly rural areas of
southwestern Billings and north central Slope Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4674 10326 4652 10326 4661 10360 4671 10360
TIME...MOT...LOC 1522Z 269DEG 13KT 4664 10347 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SCHILD

902 
WWUS53 KBIS 021545
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
945 AM MDT Thu Sep 2 2021

NDC007-087-021555-
/O.EXP.KBIS.SV.W.0168.000000T0000Z-210902T1545Z/
Billings ND-Slope ND-
945 AM MDT Thu Sep 2 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN BILLINGS AND
NORTH CENTRAL SLOPE COUNTIES HAS EXPIRED...
                
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 allowed to expire.  However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.

LAT...LON 4674 10326 4652 10326 4661 10360 4671 10360
TIME...MOT...LOC 1545Z 269DEG 13KT 4664 10336 

$$

SCHILD

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 1, 9:54 PM MDT	Special Weather Statement	BIS	LaMoure	36 min
Sep 2, 4:32 AM MDT	Special Weather Statement	BIS	Mountrail	28 min
Sep 2, 4:39 AM MDT	Special Weather Statement	BIS	Renville	51 min
Sep 2, 4:45 AM MDT	Severe Thunderstorm Warning	BIS	Mountrail	30 min
Sep 2, 4:56 AM MDT	Special Weather Statement	BIS	Mountrail	34 min
Sep 2, 5:28 AM MDT	Special Weather Statement	BIS	Renville	47 min
Sep 2, 5:30 AM MDT	Special Weather Statement	BIS	McKenzie	30 min
Sep 2, 5:51 AM MDT	Special Weather Statement	BIS	Kidder, Stutsman	39 min
Sep 2, 5:55 AM MDT	Special Weather Statement	BIS	Dunn	35 min
Sep 2, 6:22 AM MDT	Special Weather Statement	BIS	Bottineau, Ward	23 min
Sep 2, 6:40 AM MDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville, Ward	29 min
Sep 2, 7:30 AM MDT	Special Weather Statement	BIS	Bottineau	30 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.