Alert archive / Montana / Tornado Warnings in 2021

Tornado Warning 2, NWS Glasgow, MT

June 10, 2021Richland County, Roosevelt County, Montana

NWS Glasgow, MT issued this tornado warning at Jun 10, 2021, 4:12 PM MDT for Richland County, Roosevelt County, Montana. It was in force for 33 min. 3 reports 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, 4:12 PM MDT (22:12 UTC)
Expired
Jun 10, 2021, 4:45 PM MDT
In force
33 min
Issued by
NWS Glasgow, MT
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.5 in

Counties Richland County, MT, Roosevelt County, MT

The radar

The Glasgow radar (KGGW), 189 km from the middle of the area, began a volume at 22:15 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, 4:22 PM MDTHAIL 1.5Sidney, MTCORRECTS PREVIOUS HAIL REPORT FROM SIDNEY. CONTINUED PEA SIZE HAIL, WITH BRIEFLY UP TO PING PONG BALL SIZE.
Jun 10, 4:22 PM MDTHAIL 1.75Sidney, MTCONTINUED PEA SIZE HAIL, WITH BRIEFLY UP TO PING PONG BALL SIZE.
Jun 10, 4:30 PM MDTHAIL 25 Sse Sidney, MT2 INCH HAIL ALONG LOST HIGHWAY IN SIDNEY. REPORT 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

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 10.2 hours before the alert went out and 187 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 12:00Z on 2021-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 929 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Glasgow Intl Airport, MT at 12:00Z on 2021-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 651 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
929 J/kg
Mixed-layer CIN
-480 J/kg
Mixed-layer LCL
774 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
651 m²/s²
0-3 km storm-relative helicity
663 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

520 
WFUS55 KGGW 102212
TORGGW
MTC083-085-102245-
/O.NEW.KGGW.TO.W.0002.210610T2212Z-210610T2245Z/

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

The National Weather Service in Glasgow has issued a

* Tornado Warning for...
  Southeastern Roosevelt County in northeastern Montana...
  Eastern Richland County in northeastern Montana...

* Until 445 PM MDT.
    
* At 411 PM MDT, a severe thunderstorm capable of producing a tornado
  was located near Sidney, moving north at 15 mph.

  HAZARD...Tornado and ping pong ball 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 dangerous storm will be near...
  Fairview around 440 PM MDT.

Other locations impacted by this tornadic thunderstorm include Nohly,
Snowden, Wooley, Fort Union and Crane.

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 4752 10407 4749 10428 4767 10434 4778 10444
      4811 10433 4805 10404 4755 10404
TIME...MOT...LOC 2211Z 190DEG 14KT 4777 10424 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

NWS Glasgow
rux
1 follow-up statement
744 
WWUS55 KGGW 102244
SVSGGW

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

MTC083-085-102252-
/O.EXP.KGGW.TO.W.0002.000000T0000Z-210610T2245Z/
Roosevelt MT-Richland MT-
444 PM MDT Thu Jun 10 2021

...THE TORNADO WARNING FOR SOUTHEASTERN ROOSEVELT AND EASTERN
RICHLAND COUNTIES WILL EXPIRE AT 445 PM MDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

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

Remember, a Severe Thunderstorm Warning still remains in effect for
Richland County!

LAT...LON 4752 10407 4749 10428 4767 10434 4778 10444
      4811 10433 4805 10404 4755 10404
TIME...MOT...LOC 2242Z 190DEG 14KT 4788 10421 

$$

NWS Glasgow
rux

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 9, 6:56 PM MDTSevere Thunderstorm WarningGGWPhillips64 min
Jun 9, 7:51 PM MDTSevere Thunderstorm WarningGGWPhillips54 min
Jun 9, 8:30 PM MDTSpecial Weather StatementGGW45 min
Jun 9, 8:33 PM MDTSpecial Weather StatementGGWPetroleum42 min
Jun 9, 8:44 PM MDTSevere Thunderstorm WarningGGWPhillips, Valley61 min
Jun 9, 9:18 PM MDTSpecial Weather StatementGGW42 min
Jun 9, 9:32 PM MDTSevere Thunderstorm WarningGGWPetroleum, Phillips58 min
Jun 9, 10:16 PM MDTSpecial Weather StatementGGWPhillips44 min
Jun 9, 10:25 PM MDTSevere Thunderstorm WarningGGWPetroleum, Phillips65 min
Jun 9, 10:37 PM MDTSpecial Weather StatementGGW38 min
Jun 9, 10:38 PM MDTSevere Thunderstorm WarningGGWPhillips67 min
Jun 9, 11:28 PM MDTSevere Thunderstorm WarningGGWPhillips, Valley25 min
Jun 9, 11:56 PM MDTSpecial Weather StatementGGWPhillips94 min
Jun 10, 3:47 AM MDTRed Flag WarningGGWDawson, McCone, Prairie, Richland, Wibaux16 hr
Jun 10, 2:32 PM MDTSevere Thunderstorm WarningGGWDawson, Richland16 min
Jun 10, 3:14 PM MDTSevere Thunderstorm WarningGGWDawson, Richland, Roosevelt, Sheridan61 min
Jun 10, 3:27 PM MDTSevere Thunderstorm WarningGGWGarfield, Petroleum63 min
Jun 10, 3:31 PM MDTSevere Thunderstorm WarningGGWDaniels, Roosevelt, Sheridan59 min
Jun 10, 3:41 PM MDTTornado WarningGGWRichland34 min
Jun 10, 4:05 PM MDTSevere Thunderstorm WarningGGWGarfield, Petroleum55 min
Jun 10, 4:22 PM MDTSpecial Weather StatementGGW38 min
Jun 10, 4:23 PM MDTSevere Thunderstorm WarningGGWSheridan67 min
Jun 10, 4:38 PM MDTSevere Thunderstorm WarningGGWRichland, Roosevelt, Wibaux45 min
Jun 10, 5:21 PM MDTSpecial Weather StatementGGWGarfield39 min
Jun 10, 5:44 PM MDTSevere Thunderstorm WarningGGWDawson, Richland, Wibaux61 min
Jun 10, 5:54 PM MDTSevere Thunderstorm WarningGGWGarfield66 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.