Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 107, NWS Bismarck, ND

July 17, 2021Bottineau County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 17, 2021, 7:57 PM CDT for Bottineau County, North Dakota. It was in force for 48 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 17, 2021, 7:57 PM CDT (00:57 UTC)
Expired: Jul 17, 2021, 8:45 PM CDT
In force: 48 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

County Bottineau County, ND

The radar

The Minot AFB radar (KMBX), 64 km from the middle of the area, began a volume at 00:57 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 17, 8:16 PM CDT	HAIL 0.7	6 S Antler, 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, 1.0 hours before the alert went out and 241 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: 1344 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 2040 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

219 
WUUS53 KBIS 180057
SVRBIS
NDC009-180145-
/O.NEW.KBIS.SV.W.0107.210718T0057Z-210718T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
757 PM CDT Sat Jul 17 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Northwestern Bottineau County in north central North Dakota...

* Until 845 PM CDT.

* At 756 PM CDT, a severe thunderstorm was located near Antler, or 
  15 miles northeast of Mohall, moving east at 15 mph.

  HAZARD...Golf 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 
  northwestern Bottineau County, along with affecting the city of 
  Antler.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4883 10106 4890 10150 4900 10150 4900 10103
TIME...MOT...LOC 0056Z 281DEG 14KT 4893 10130 

HAIL...1.75IN
WIND...60MPH
 
$$

SCHILD

3 follow-up statements

376 
WWUS53 KBIS 180110
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
810 PM CDT Sat Jul 17 2021

NDC009-180145-
/O.CON.KBIS.SV.W.0107.000000T0000Z-210718T0145Z/
Bottineau ND-
810 PM CDT Sat Jul 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR NORTHWESTERN BOTTINEAU COUNTY...

At 809 PM CDT, a severe thunderstorm was located near Antler, or 17
miles northeast of Mohall, 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...
Antler.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4889 10145 4900 10144 4900 10103 4883 10106
TIME...MOT...LOC 0109Z 281DEG 14KT 4892 10122 

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

SCHILD

931 
WWUS53 KBIS 180120
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
820 PM CDT Sat Jul 17 2021

NDC009-180145-
/O.CON.KBIS.SV.W.0107.000000T0000Z-210718T0145Z/
Bottineau ND-
820 PM CDT Sat Jul 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR NORTHWESTERN BOTTINEAU COUNTY...

At 820 PM CDT, a severe thunderstorm was located 6 miles southeast of
Antler, or 16 miles northeast of Mohall, 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
northwestern Bottineau County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4888 10136 4896 10135 4895 10104 4883 10106
TIME...MOT...LOC 0120Z 289DEG 13KT 4889 10120 

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

SCHILD

495 
WWUS53 KBIS 180143
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
843 PM CDT Sat Jul 17 2021

NDC009-180153-
/O.EXP.KBIS.SV.W.0107.000000T0000Z-210718T0145Z/
Bottineau ND-
843 PM CDT Sat Jul 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BOTTINEAU COUNTY
WILL EXPIRE AT 845 PM 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 4888 10136 4896 10135 4895 10104 4883 10106
TIME...MOT...LOC 0143Z 281DEG 14KT 4888 10109 

$$

SCHILD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 7:32 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville	28 min
Jul 17, 8:15 PM CDT	Special Weather Statement	BIS	Bowman	30 min
Jul 17, 9:21 PM CDT	Special Weather Statement	BIS	Bowman	39 min
Jul 18, 1:22 AM CDT	Special Weather Statement	BIS	Bottineau	38 min
Jul 18, 2:00 AM CDT	Special Weather Statement	BIS	Rolette	45 min
Jul 18, 2:45 AM CDT	Special Weather Statement	BIS	Rolette	45 min
Jul 18, 3:30 AM CDT	Special Weather Statement	BIS	Rolette	30 min
Jul 18, 5:03 AM CDT	Special Weather Statement	BIS	Rolette	27 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.