Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 111, NWS Bismarck, ND

July 19, 2021McHenry County, McLean County, Sheridan County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 19, 2021, 7:19 PM CDT for McHenry County, McLean County, Sheridan County, North Dakota. It was in force for 18 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 19, 2021, 7:19 PM CDT (00:19 UTC)
Expired: Jul 19, 2021, 7:37 PM CDT
In force: 18 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 2.75 in
Wind: 70.0 mph

Counties McHenry County, ND, McLean County, ND, Sheridan County, ND

The radar

The Minot AFB radar (KMBX), 70 km from the middle of the area, began a volume at 00:22 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 19, 7:20 PM CDT	TSTM WND GST 60	2 Nnw Kief, ND	COMBINED WITH PEA SIZE HAIL.

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, 0.3 hours before the alert went out and 117 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: 114 J/kg
Mixed-layer CIN: -159 J/kg
Mixed-layer LCL: 2818 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

As transmitted.

986 
WUUS53 KBIS 200019
SVRBIS
NDC049-055-083-200115-
/O.NEW.KBIS.SV.W.0111.210720T0019Z-210720T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
719 PM CDT Mon Jul 19 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Northern Sheridan County in south central North Dakota...
  Northeastern McLean County in south central North Dakota...
  Southeastern McHenry County in north central North Dakota...

* Until 815 PM CDT.

* At 718 PM CDT, a severe thunderstorm was located 6 miles west of
  Drake, or 27 miles west of Harvey, moving south at 15 mph.

  This is a very dangerous storm.

  HAZARD...Baseball size hail and 70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be severely injured. 
           Expect shattered windows, extensive damage to roofs, 
           siding, and vehicles.

* Locations impacted include...
  Drake, Anamoose, Butte, Balfour, Kief, Sheyenne Lake and Krueger
  Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

&&

LAT...LON 4795 10064 4801 10049 4796 10025 4761 10014
      4757 10048 4762 10081
TIME...MOT...LOC 0018Z 359DEG 15KT 4789 10051 

HAIL...2.75IN
WIND...70MPH
 
$$

EDWARDS

1 follow-up statement

700 
WWUS53 KBIS 200037
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
737 PM CDT Mon Jul 19 2021

NDC049-055-083-200047-
/O.CAN.KBIS.SV.W.0111.000000T0000Z-210720T0115Z/
Sheridan ND-McLean ND-McHenry ND-
737 PM CDT Mon Jul 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN SHERIDAN...
NORTHEASTERN MCLEAN AND SOUTHEASTERN MCHENRY COUNTIES 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 4795 10064 4801 10049 4796 10025 4761 10014
      4757 10048 4762 10081
TIME...MOT...LOC 0036Z 359DEG 15KT 4781 10051 

$$

EDWARDS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 8:46 PM CDT	Special Weather Statement	BIS	Pierce	29 min
Jul 19, 11:29 PM CDT	Special Weather Statement	BIS	Rolette	31 min
Jul 20, 3:47 AM CDT	Red Flag Warning	BIS	Billings, Bowman, Golden Valley, Slope	19 hr
Jul 20, 5:48 PM CDT	Special Weather Statement	BIS	Golden Valley	27 min
Jul 20, 5:58 PM CDT	Severe Thunderstorm Warning	BIS	Golden Valley	34 min
Jul 20, 6:42 PM CDT	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.