Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 110, NWS Bismarck, ND

July 19, 2021Rolette County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 19, 2021, 6:44 PM CDT for Rolette County, North Dakota. It was in force for 36 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, 6:44 PM CDT (23:44 UTC)
Expired: Jul 19, 2021, 7:20 PM CDT
In force: 36 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Rolette County, ND

The radar

The Minot AFB radar (KMBX), 102 km from the middle of the area, began a volume at 23:46 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, 6:51 PM CDT	HAIL 1	2 Ne Mylo, ND	TIME ESTIMATED BASED ON 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, 11.7 hours before the alert went out and 231 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: 1332 J/kg
Mixed-layer CIN: -233 J/kg
Mixed-layer LCL: 1421 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

902 
WUUS53 KBIS 192344
SVRBIS
NDC079-200030-
/O.NEW.KBIS.SV.W.0110.210719T2344Z-210720T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
644 PM CDT Mon Jul 19 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Southeastern Rolette County in north central North Dakota...

* Until 730 PM CDT.

* At 643 PM CDT, a severe thunderstorm was located 7 miles west of
  Bisbee, or 14 miles south of Rolla, moving southeast at 35 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.

* Locations impacted include...
  Mylo and Agate. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4886 9953 4873 9953 4872 9952 4872 9949
      4855 9949 4854 9953 4855 9967 4875 9975
TIME...MOT...LOC 2343Z 333DEG 31KT 4866 9954 

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

EDWARDS

2 follow-up statements

027 
WWUS53 KBIS 200001
SVSBIS

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

NDC079-200030-
/O.CON.KBIS.SV.W.0110.000000T0000Z-210720T0030Z/
Rolette ND-
701 PM CDT Mon Jul 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR SOUTHEASTERN ROLETTE COUNTY...

At 700 PM CDT, a severe thunderstorm was located 7 miles southwest of
Bisbee, or 22 miles south of Rolla, moving southeast at 35 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.

Locations impacted include...
Mylo and Agate. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4873 9953 4872 9952 4872 9949 4855 9949
      4854 9953 4855 9967 4865 9971 4880 9953
TIME...MOT...LOC 0000Z 333DEG 30KT 4855 9947 

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

EDWARDS

225 
WWUS53 KBIS 200020
SVSBIS

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

NDC079-200029-
/O.CAN.KBIS.SV.W.0110.000000T0000Z-210720T0030Z/
Rolette ND-
720 PM CDT Mon Jul 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ROLETTE COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

LAT...LON 4873 9953 4872 9952 4872 9949 4855 9949
      4854 9953 4855 9967 4865 9971 4880 9953
TIME...MOT...LOC 0017Z 333DEG 31KT 4840 9935 

$$

EDWARDS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 4:23 AM CDT	Heat Advisory	BIS	Billings, Burleigh, Divide, Dunn, Golden Valley, McHenry and 8 more	17 hr
Jul 19, 9:03 AM CDT	Special Weather Statement	BIS	Rolette	42 min
Jul 19, 5:28 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	62 min
Jul 19, 6:26 PM CDT	Severe Thunderstorm Warning	BIS	McHenry	64 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.