Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 125, NWS Bismarck, ND

August 9, 2021McHenry County, Pierce County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 9, 2021, 6:10 PM CDT for McHenry County, Pierce County, North Dakota. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 9, 2021, 6:10 PM CDT (23:10 UTC)
Expired: Aug 9, 2021, 6:45 PM CDT
In force: 35 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties McHenry County, ND, Pierce County, ND

The radar

The Minot AFB radar (KMBX), 65 km from the middle of the area, began a volume at 23:12 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 9, 4:01 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.2 hours before the alert went out and 164 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: 851 J/kg
Mixed-layer CIN: -361 J/kg
Mixed-layer LCL: 1736 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

726 
WUUS53 KBIS 092310
SVRBIS
NDC049-069-092345-
/O.NEW.KBIS.SV.W.0125.210809T2310Z-210809T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
610 PM CDT Mon Aug 9 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Northwestern Pierce County in north central North Dakota...
  East central McHenry County in north central North Dakota...

* Until 645 PM CDT.

* At 610 PM CDT, a severe thunderstorm was located 8 miles southwest
  of Balta, or 19 miles southwest of Rugby, moving northeast at 45
  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 be near...
  Balta around 620 PM CDT.

Other locations in the path of this severe thunderstorm include
Rugby.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4823 9984 4811 9985 4797 10025 4812 10042
      4842 10006
TIME...MOT...LOC 2310Z 229DEG 38KT 4812 10020 

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

$$

HARGROVE

2 follow-up statements

773 
WWUS53 KBIS 092324
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
624 PM CDT Mon Aug 9 2021

NDC049-092334-
/O.CAN.KBIS.SV.W.0125.000000T0000Z-210809T2345Z/
McHenry ND-
624 PM CDT Mon Aug 9 2021

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

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
north central North Dakota.

LAT...LON 4823 9984 4811 9985 4804 10005 4818 10022
      4837 10000
TIME...MOT...LOC 2324Z 235DEG 27KT 4818 10008 

$$

NDC069-092345-
/O.CON.KBIS.SV.W.0125.000000T0000Z-210809T2345Z/
Pierce ND-
624 PM CDT Mon Aug 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR WEST CENTRAL PIERCE COUNTY...

At 624 PM CDT, a severe thunderstorm was located over Balta, or 13
miles south of Rugby, moving northeast at 30 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 west
central Pierce County, including the following locations... Silva.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4823 9984 4811 9985 4804 10005 4818 10022
      4837 10000
TIME...MOT...LOC 2324Z 235DEG 27KT 4818 10008 

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

$$

HARGROVE

280 
WWUS53 KBIS 092336
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
636 PM CDT Mon Aug 9 2021

NDC069-092346-
/O.EXP.KBIS.SV.W.0125.000000T0000Z-210809T2345Z/
Pierce ND-
636 PM CDT Mon Aug 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL PIERCE COUNTY
WILL EXPIRE AT 645 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.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
north central North Dakota.

LAT...LON 4823 9984 4811 9985 4804 10005 4818 10022
      4837 10000
TIME...MOT...LOC 2336Z 229DEG 38KT 4826 9995 

$$

TELKEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 10:10 PM CDT	Special Weather Statement	BIS	Golden Valley, Slope	50 min
Aug 9, 3:55 AM CDT	Fire Weather Watch	BIS	Adams, Bowman, Hettinger, Slope	24 hr
Aug 9, 2:15 PM CDT	Special Weather Statement	BIS	Ward	45 min
Aug 9, 2:49 PM CDT	Special Weather Statement	BIS	Renville	41 min
Aug 9, 5:23 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Wells	52 min
Aug 9, 5:29 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Kidder, Wells	46 min
Aug 9, 5:53 PM CDT	Special Weather Statement	BIS	Rolette	37 min
Aug 9, 6:02 PM CDT	Severe Thunderstorm Warning Destructive damage threat	BIS	Foster, Wells	43 min
Aug 9, 6:43 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Foster	47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.