Alert archive / Montana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 49, NWS Glasgow, MT

June 10, 20214 counties in Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 10, 2021, 9:03 PM MDT for 4 counties in Montana. It was in force for 57 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: Jun 10, 2021, 9:03 PM MDT (03:03 UTC)
Expired: Jun 10, 2021, 10:00 PM MDT
In force: 57 min
Issued by: NWS Glasgow, MT
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Dawson County, MT, McCone County, MT, Richland County, MT, Roosevelt County, MT

The radar

The Glasgow radar (KGGW), 117 km from the middle of the area, began a volume at 03:05 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
Jun 10, 8:54 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 3.1 hours before the alert went out and 116 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: 1762 J/kg
Mixed-layer CIN: -194 J/kg
Mixed-layer LCL: 1872 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 262 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.5

Open this sounding in Storm Lab

The text

As transmitted.

714 
WUUS55 KGGW 110303
SVRGGW
MTC021-055-083-085-110400-
/O.NEW.KGGW.SV.W.0049.210611T0303Z-210611T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Glasgow MT
903 PM MDT Thu Jun 10 2021

The National Weather Service in Glasgow has issued a

* Severe Thunderstorm Warning for...
  Central Roosevelt County in northeastern Montana...
  Northeastern McCone County in northeastern Montana...
  Northwestern Dawson County in northeastern Montana...
  Northwestern Richland County in northeastern Montana...

* Until 1000 PM MDT.

* At 903 PM MDT, severe thunderstorms were located along a line
  extending from Wolf Point to 7 miles north of Richey, moving
  northeast at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Wolf Point, Poplar, Culbertson, Brockton, Sprole and Fort Kipp. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Wind damage with these storms will occur before any rain or
lightning. Do not wait for the sound of thunder before taking cover.
SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.

&&

LAT...LON 4767 10508 4807 10576 4856 10512 4856 10501
      4810 10424
TIME...MOT...LOC 0303Z 226DEG 30KT 4807 10563 4775 10511 

HAIL...<.75IN
WIND...60MPH
 
$$

NWS Glasgow

1 follow-up statement

726 
WWUS55 KGGW 110333
SVSGGW

Severe Weather Statement
National Weather Service Glasgow MT
933 PM MDT Thu Jun 10 2021

MTC021-110343-
/O.CAN.KGGW.SV.W.0049.000000T0000Z-210611T0400Z/
Dawson MT-
933 PM MDT Thu Jun 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN DAWSON COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 200 AM MDT for
northeastern Montana.

LAT...LON 4778 10491 4807 10576 4856 10512 4856 10501
      4810 10424
TIME...MOT...LOC 0333Z 227DEG 46KT 4821 10541 4799 10472 

$$

MTC055-083-085-110400-
/O.CON.KGGW.SV.W.0049.000000T0000Z-210611T0400Z/
Roosevelt MT-McCone MT-Richland MT-
933 PM MDT Thu Jun 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM MDT
FOR CENTRAL ROOSEVELT...NORTHEASTERN MCCONE AND NORTHWESTERN RICHLAND
COUNTIES...

At 933 PM MDT, severe thunderstorms were located along a line
extending from 12 miles northwest of Poplar to 14 miles southeast of
Brockton, moving northeast at 55 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...
Wolf Point, Poplar, Culbertson, Brockton, Sprole and Fort Kipp. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Wind damage with these storms will occur before any rain or
lightning. Do not wait for the sound of thunder before taking cover.
SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.

&&

LAT...LON 4778 10491 4807 10576 4856 10512 4856 10501
      4810 10424
TIME...MOT...LOC 0333Z 227DEG 46KT 4821 10541 4799 10472 

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

NWS Glasgow

The office that day

Everything else NWS Glasgow, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 6:24 PM MDT	Areal Flood Advisory	GGW	Richland, Wibaux	2 hr
Jun 10, 6:40 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Wibaux	65 min
Jun 10, 6:54 PM MDT	Special Weather Statement	GGW	Garfield	51 min
Jun 10, 7:22 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Valley	53 min
Jun 10, 7:30 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Garfield, McCone, Prairie	60 min
Jun 10, 7:42 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Wibaux	40 min
Jun 10, 7:52 PM MDT	Tornado Warning	GGW	Daniels, Roosevelt, Valley	26 min
Jun 10, 7:57 PM MDT	Areal Flood Advisory	GGW	Daniels, Roosevelt, Valley	98 min
Jun 10, 8:09 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan, Valley	32 min
Jun 10, 8:23 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	67 min
Jun 10, 8:37 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Valley	33 min
Jun 10, 9:05 PM MDT	Special Weather Statement	GGW	Daniels, Roosevelt, Sheridan	40 min
Jun 10, 9:15 PM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt	60 min
Jun 10, 9:48 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	57 min

Nearby

Severe Thunderstorm Warnings in Montana, 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.