Alert archive / Montana / Special Weather Statements in 2021

Special Weather Statement, NWS Glasgow, MT

June 9, 2021Phillips County, Montana

NWS Glasgow, MT issued this special weather statement at Jun 9, 2021, 10:16 PM MDT for Phillips County, Montana. It was in force for 44 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 9, 2021, 10:16 PM MDT (04:16 UTC)
Expired: Jun 9, 2021, 11:00 PM MDT
In force: 44 min
Issued by: NWS Glasgow, MT

County Phillips County, MT

The radar

The Glasgow radar (KGGW), 127 km from the middle of the area, began a volume at 04:16 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 nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 4.3 hours before the alert went out and 188 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: 22 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 1287 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 408 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Glasgow, MT wrote its last area forecast discussion before this special weather statement went out at Jun 9, 9:28 PM MDT, 48 minutes earlier.

Area forecast discussion, Jun 9, 9:28 PM MDT, 48 minutes before

Area Forecast Discussion
National Weather Service Glasgow MT
928 PM MDT Wed Jun 9 2021

.DISCUSSION...
Today is the lull between storms, with severe potential once again
Thursday with all modes of severe possible. In addition, locally
heavy rainfall is once again possible Thursday afternoon and
evening. In addition, there's a chance for some severe storms
tonight in the far northern and western portions of the CWA.

Tonight...
Showers and thunderstorms should enter the CWA late this evening
and overnight tonight, with some gusty winds and small hail
possible with any storms that do develop. In addition, the
environmental winds will begin to pick up area-wide, which will be
enough to reach Lake Wind Advisory criteria over Fort Peck Lake.
Some lingering showers and thunder is possible in the northeast
(Daniels and Sheridan Counties) from whatever's left over from
the overnight convection.

Thursday through Friday....
CAMs guidance in fairly good agreement in developing storms
tomorrow afternoon over the eastern half of the CWA in the
ballpark of 3 PM MDT. In addition, storms will be developing over
Central Montana as well, so there will be a dry slot in between
the two areas of convection. The eastern line will move into North
Dakota during the evening while the convection in Central Montana
spreads across the area. WPC has outlooked roughly the eastern
half of the CWA for a marginal risk of excessive rainfall, with a
slight risk roughly east of a Scobey to Wibaux line: this seems
reasonable given the doubleshot of storms this part of the area
should get, and a Flash Flood Watch may be needed in later
forecast packages. SPC has the eastern half of the CWA under an
enhanced risk, with a hatched area for winds and hail (with the
hatched hail area for almost all of the area):
this also is reasonable given the convective parameters that are
setting up. After the storms move out, the gusty environmental
winds will continue into Friday and temperatures will be much
cooler than it was today or what it will be on Thursday.

Saturday and beyond...
Upper level ridging will begin to build in, leading to rising
temperatures through the weekend into early next week. The peak of
the heat currently appears to be Monday and Tuesday. Dry weather
will return as well.

97

&&

.AVIATION...
FLIGHT CONDITIONS: Periods of MVFR ceilings are possible Thursday
morning at KGGW and KOLF. VFR conditions expected Thursday
afternoon.

LLWS: Possible overnight tonight just before sunrise at KSDY and
KGDV. Possible again at all terminals Thursday evening into Friday
morning.

WINDS: E 15-20 kts overnight tonight. SE-E 15-25 kts Thursday
morning, switching to the W-NW 15-25kts, gusts 30-35kts by
afternoon.

SYNOPSIS: A round of showers and thunderstorms will impact
Phillips, Petroleum and Valley counties overnight, possibly
impacting KGGW by early morning. Debris clouds left over from
these overnight storms may lower ceilings to MVFR conditions at
the western terminals. Ceilings lift by noon Thursday but
widespread showers and thunderstorms will develop by afternoon
with some of the storms becoming severe. The storms will begin to
push out of the area by midnight and should exit into North Dakota
by Friday morning.

RMB

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...
Fire Weather Watch from Thursday morning through Thursday
evening for MTZ122-137.

Lake Wind Advisory from 3 AM Thursday to 7 PM MDT Friday For
Fort Peck Lake for Central and Southeast Phillips...Central and
Southern Valley...Garfield...McCone...Petroleum.

&&

weather.gov/glasgow

In the hours before

Local storm report, Jun 9, 8:39 PM MDT, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
839 PM MDT WED JUN 9 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0730 PM     HAIL             8 SW PHILLIPS           48.02N 108.29W
06/09/2021  M2.00 INCH       PHILLIPS           MT   PUBLIC

            TWITTER PHOTO OF HAILSTONES WITH
            MEASUREMENT. TIME ESTIMATED.

&&

JEZ

Local storm report, Jun 9, 8:48 PM MDT, 1 hour 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
848 PM MDT WED JUN 9 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 PM     HAIL             8 E ZORTMAN             47.93N 108.35W
06/09/2021  M3.00 INCH       PHILLIPS           MT   PUBLIC

            TWITTER PHOTO OF HAIL MEASUREMENT. TIME
            ESTIMATED.

&&

JEZ

Special weather statement, Jun 9, 9:18 PM MDT, 58 minutes before

Special Weather Statement
National Weather Service Glasgow MT
918 PM MDT Wed Jun 9 2021

MTZ016-060-100400-
Southwest Phillips MT-Central and Southeast Phillips MT-
918 PM MDT Wed Jun 9 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN PHILLIPS COUNTY
UNTIL 1000 PM MDT...

At 918 PM MDT, Doppler radar was tracking a strong thunderstorm 17
miles northeast of Roy, or 27 miles south of Zortman, moving
northeast at 40 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Zortman, Landusky and Fred Robinson Bridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.

&&

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

LAT...LON 4792 10874 4792 10863 4799 10861 4798 10844
      4800 10843 4789 10808 4758 10841 4762 10844
      4760 10848 4760 10851 4762 10852 4761 10858
      4762 10861 4762 10867 4765 10873 4764 10876
      4766 10879 4768 10878 4771 10883
TIME...MOT...LOC 0318Z 206DEG 33KT 4754 10874

NWS Glasgow
TFJ

Local storm report, Jun 9, 9:27 PM MDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
927 PM MDT WED JUN 9 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0740 PM     HAIL             ZORTMAN                 47.92N 108.53W
06/09/2021  M1.70 INCH       PHILLIPS           MT   PUBLIC

            PHOTO SUBMITTED SHOWING GOLF BALL SIZED HAIL
            AND SHINGLE DAMAGE. TIME ESTIMATED.

&&

RUX

Local storm report, Jun 9, 9:31 PM MDT, 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
931 PM MDT WED JUN 9 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0719 PM     TSTM WND GST     5 WNW LANDUSKY          47.92N 108.73W
06/09/2021  M56 MPH          PHILLIPS           MT   MESONET

            WIND GUST FROM MESONET STATION MTHAY 6.1 SW
            HAYS (MT DOT). SUSTAINED WIND 44 MPH.

&&

JEZ

Special weather statement, Jun 9, 10:16 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Glasgow MT
1016 PM MDT Wed Jun 9 2021

MTZ016-060-100500-
Southwest Phillips MT-Central and Southeast Phillips MT-
1016 PM MDT Wed Jun 9 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL PHILLIPS COUNTY UNTIL
1100 PM MDT...

At 1015 PM MDT, Doppler radar was tracking a strong thunderstorm 11
miles northeast of Hays, or 12 miles north of Zortman, moving
northeast at 30 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Dodson and Phillips.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

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

LAT...LON 4822 10843 4822 10841 4837 10841 4845 10831
      4825 10788 4796 10840 4798 10844
TIME...MOT...LOC 0415Z 223DEG 27KT 4809 10845

NWS Glasgow
rux

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 6:56 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	64 min
Jun 9, 7:51 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	54 min
Jun 9, 8:30 PM MDT	Special Weather Statement	GGW		45 min
Jun 9, 8:33 PM MDT	Special Weather Statement	GGW	Petroleum	42 min
Jun 9, 8:44 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	61 min
Jun 9, 9:18 PM MDT	Special Weather Statement	GGW		42 min
Jun 9, 9:32 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum, Phillips	58 min
Jun 9, 10:25 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum, Phillips	65 min
Jun 9, 10:37 PM MDT	Special Weather Statement	GGW		38 min
Jun 9, 10:38 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	67 min
Jun 9, 11:28 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	25 min
Jun 9, 11:56 PM MDT	Special Weather Statement	GGW	Phillips	94 min
Jun 10, 3:47 AM MDT	Red Flag Warning	GGW	Dawson, McCone, Prairie, Richland, Wibaux	16 hr
Jun 10, 2:32 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	16 min
Jun 10, 3:14 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Roosevelt, Sheridan	61 min
Jun 10, 3:27 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	63 min
Jun 10, 3:31 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Sheridan	59 min
Jun 10, 3:41 PM MDT	Tornado Warning	GGW	Richland	34 min
Jun 10, 4:05 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	55 min
Jun 10, 4:12 PM MDT	Tornado Warning	GGW	Richland, Roosevelt	33 min
Jun 10, 4:22 PM MDT	Special Weather Statement	GGW		38 min
Jun 10, 4:23 PM MDT	Severe Thunderstorm Warning	GGW	Sheridan	67 min
Jun 10, 4:38 PM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt, Wibaux	45 min
Jun 10, 5:21 PM MDT	Special Weather Statement	GGW	Garfield	39 min
Jun 10, 5:44 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Wibaux	61 min
Jun 10, 5:54 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	66 min

Nearby

Special Weather Statements in Montana, 2021 Every special weather statement 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.