Alert archive / Montana / Tornado Warnings in 2021

Tornado Warning 3, NWS Glasgow, MT

June 10, 2021Daniels County, Roosevelt County, Valley County, Montana

NWS Glasgow, MT issued this tornado warning at Jun 10, 2021, 7:52 PM MDT for Daniels County, Roosevelt County, Valley County, Montana. It was in force for 26 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
Jun 10, 2021, 7:52 PM MDT (01:52 UTC)
Expired
Jun 10, 2021, 8:18 PM MDT
In force
26 min
Issued by
NWS Glasgow, MT
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Daniels County, MT, Roosevelt County, MT, Valley County, MT

The radar

The Glasgow radar (KGGW), 69 km from the middle of the area, began a volume at 01:53 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

TimeReportWhereRemark
Jun 10, 8:01 PM MDTHAIL 1Lustre, MTPEA TO QUARTER SIZED HAIL. TIME ESTIMATED FROM RADAR. STORM TOTAL RAINFALL OF 4 INCHES THROUGH FRIDAY MORNING. FROM SOCIAL MEDIA.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 10, 2:30 PM MDTTornado WatchSPC6 hr
Jun 10, 2:52 PM MDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 1.9 hours before the alert went out and 67 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-pSkew-T log-p diagram, Glasgow Intl Airport, MT at 00:00Z on 2021-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1762 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Glasgow Intl Airport, MT at 00:00Z on 2021-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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.

332 
WFUS55 KGGW 110152
TORGGW
MTC019-085-105-110245-
/O.NEW.KGGW.TO.W.0003.210611T0152Z-210611T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Glasgow MT
752 PM MDT Thu Jun 10 2021

The National Weather Service in Glasgow has issued a

* Tornado Warning for...
  South central Daniels County in northeastern Montana...
  Northwestern Roosevelt County in northeastern Montana...
  East central Valley County in northeastern Montana...

* Until 845 PM MDT.
    
* At 752 PM MDT, a severe thunderstorm capable of producing a tornado
  was located near Lustre, or 19 miles northwest of Wolf Point,
  moving northeast at 25 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  south central Daniels, northwestern Roosevelt and east central
  Valley Counties, including the following locations... Volt.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4827 10586 4834 10595 4870 10568 4853 10538
TIME...MOT...LOC 0152Z 215DEG 21KT 4835 10582 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

NWS Glasgow
rux
1 follow-up statement
182 
WWUS55 KGGW 110218
SVSGGW

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

MTC019-085-105-110226-
/O.CAN.KGGW.TO.W.0003.000000T0000Z-210611T0245Z/
Daniels MT-Roosevelt MT-Valley MT-
818 PM MDT Thu Jun 10 2021

...THE TORNADO WARNING FOR SOUTH CENTRAL DANIELS...NORTHWESTERN
ROOSEVELT AND EAST CENTRAL VALLEY COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.  However hail, gusty 
winds and heavy rain are still possible with this thunderstorm.

A Tornado Watch remains in effect until 900 PM MDT for northeastern
Montana.

A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for
northeastern Montana.

Remember, a Severe Thunderstorm Warning still remains in effect for 
Daniels County, Northwestern Roosevelt County and Northeastern 
Valley County.

LAT...LON 4827 10586 4834 10595 4870 10568 4853 10538
TIME...MOT...LOC 0215Z 215DEG 21KT 4847 10570 

$$

NWS Glasgow
rux

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 6:24 PM MDTAreal Flood AdvisoryGGWRichland, Wibaux2 hr
Jun 10, 6:40 PM MDTSevere Thunderstorm WarningGGWDawson, Richland, Wibaux65 min
Jun 10, 6:54 PM MDTSpecial Weather StatementGGWGarfield51 min
Jun 10, 7:22 PM MDTSevere Thunderstorm WarningGGWDaniels, Roosevelt, Valley53 min
Jun 10, 7:30 PM MDTSevere Thunderstorm WarningGGWDawson, Garfield, McCone, Prairie60 min
Jun 10, 7:42 PM MDTSevere Thunderstorm WarningGGWDawson, Richland, Wibaux40 min
Jun 10, 7:57 PM MDTAreal Flood AdvisoryGGWDaniels, Roosevelt, Valley98 min
Jun 10, 8:09 PM MDTSevere Thunderstorm WarningGGWDaniels, Roosevelt, Sheridan, Valley32 min
Jun 10, 8:23 PM MDTSevere Thunderstorm WarningGGWDawson, McCone, Richland67 min
Jun 10, 8:37 PM MDTSevere Thunderstorm WarningGGWDaniels, Roosevelt, Valley33 min
Jun 10, 9:03 PM MDTSevere Thunderstorm WarningGGWDawson, McCone, Richland, Roosevelt57 min
Jun 10, 9:05 PM MDTSpecial Weather StatementGGWDaniels, Roosevelt, Sheridan40 min
Jun 10, 9:15 PM MDTSevere Thunderstorm WarningGGWRichland, Roosevelt60 min
Jun 10, 9:48 PM MDTSevere Thunderstorm WarningGGWDaniels, Roosevelt, Sheridan57 min

Nearby

Tornado Warnings in Montana, 2021Every tornado warning in 2021Tornadoes 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.