Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 166, NWS Bismarck, ND

September 2, 2021Mountrail County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Sep 2, 2021, 5:45 AM CDT for Mountrail County, North Dakota. It was in force for 30 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, 5:45 AM CDT (10:45 UTC)
Expired: Sep 2, 2021, 6:15 AM CDT
In force: 30 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Mountrail County, ND

The radar

The Minot AFB radar (KMBX), 98 km from the middle of the area, began a volume at 10:47 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, 5:50 AM CDT	HAIL 1	1 W Stanley, ND

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 00:00Z, 10.8 hours before the alert went out and 213 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: 124 J/kg
Mixed-layer CIN: -334 J/kg
Mixed-layer LCL: 1070 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

293 
WUUS53 KBIS 021045
SVRBIS
NDC061-021115-
/O.NEW.KBIS.SV.W.0166.210902T1045Z-210902T1115Z/

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

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Northeastern Mountrail County in northwestern North Dakota...

* Until 615 AM CDT.

* At 544 AM CDT, a severe thunderstorm was located over Stanley,
  moving northeast at 30 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Palermo around 600 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4842 10197 4838 10197 4819 10241 4833 10258
      4855 10227 4855 10213
TIME...MOT...LOC 1044Z 230DEG 24KT 4831 10241 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

ANGLIN

3 follow-up statements

266 
WWUS53 KBIS 021052
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
552 AM CDT Thu Sep 2 2021

NDC061-021115-
/O.CON.KBIS.SV.W.0166.000000T0000Z-210902T1115Z/
Mountrail ND-
552 AM CDT Thu Sep 2 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 AM CDT
FOR NORTHEASTERN MOUNTRAIL COUNTY...

At 551 AM CDT, a severe thunderstorm was located over Stanley, moving
northeast at 30 mph.

HAZARD...Quarter size hail.

SOURCE...Trained weather spotters quarter size hail near Stanley.

IMPACT...Damage to vehicles is expected.

This severe storm will be near...
  Palermo around 600 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4842 10197 4838 10197 4819 10241 4833 10258
      4855 10227 4855 10213
TIME...MOT...LOC 1051Z 230DEG 24KT 4834 10235 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

ANGLIN

632 
WWUS53 KBIS 021104
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
604 AM CDT Thu Sep 2 2021

NDC061-021115-
/O.CON.KBIS.SV.W.0166.000000T0000Z-210902T1115Z/
Mountrail ND-
604 AM CDT Thu Sep 2 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 AM CDT
FOR NORTHEASTERN MOUNTRAIL COUNTY...

At 603 AM CDT, a severe thunderstorm was located near Palermo, or 8
miles northeast of Stanley, moving northeast at 30 mph.

HAZARD...Quarter size hail.

SOURCE...At 547 AM CDT trained weather spotters report quarter size 
         hail near Stanley.

IMPACT...Damage to vehicles is expected.

This severe thunderstorm will remain over mainly rural areas of
northeastern Mountrail County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4842 10197 4838 10197 4821 10235 4837 10252
      4855 10227 4855 10213
TIME...MOT...LOC 1103Z 230DEG 24KT 4839 10225 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

ANGLIN

404 
WWUS53 KBIS 021112
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
612 AM CDT Thu Sep 2 2021

NDC061-021122-
/O.EXP.KBIS.SV.W.0166.000000T0000Z-210902T1115Z/
Mountrail ND-
612 AM CDT Thu Sep 2 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MOUNTRAIL COUNTY
WILL EXPIRE AT 615 AM CDT...
                
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
is still possible with this thunderstorm.

LAT...LON 4842 10197 4838 10197 4821 10235 4837 10252
      4855 10227 4855 10213
TIME...MOT...LOC 1112Z 230DEG 24KT 4841 10221 

$$

ANGLIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 1, 10:54 PM CDT	Special Weather Statement	BIS	LaMoure	36 min
Sep 2, 5:32 AM CDT	Special Weather Statement	BIS	Mountrail	28 min
Sep 2, 5:39 AM CDT	Special Weather Statement	BIS	Renville	51 min
Sep 2, 5:56 AM CDT	Special Weather Statement	BIS	Mountrail	34 min
Sep 2, 6:28 AM CDT	Special Weather Statement	BIS	Renville	47 min
Sep 2, 6:30 AM CDT	Special Weather Statement	BIS	McKenzie	30 min
Sep 2, 6:51 AM CDT	Special Weather Statement	BIS	Kidder, Stutsman	39 min
Sep 2, 6:55 AM CDT	Special Weather Statement	BIS	Dunn	35 min
Sep 2, 7:22 AM CDT	Special Weather Statement	BIS	Bottineau, Ward	23 min
Sep 2, 7:40 AM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville, Ward	29 min
Sep 2, 8:30 AM CDT	Special Weather Statement	BIS	Bottineau	30 min
Sep 2, 10:04 AM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, Slope	41 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.