Severe Thunderstorm Warning 27, NWS Great Falls, MT

620 
WWUS55 KTFX 100142
SVSTFX

Severe Weather Statement
National Weather Service Great Falls MT
742 PM MDT SAT JUN 9 2018

MTC027-045-100200-
/O.CON.KTFX.SV.W.0027.000000T0000Z-180610T0200Z/
Judith Basin MT-Fergus MT-
742 PM MDT SAT JUN 9 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MDT
FOR NORTHEASTERN JUDITH BASIN AND WEST CENTRAL FERGUS COUNTIES...

At 741 PM MDT, a severe thunderstorm was located near Denton, or 19
miles northeast of Stanford, moving northeast at 20 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Denton and Danvers. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4712 10984 4725 11006 4744 10992 4729 10964
TIME...MOT...LOC 0141Z 215DEG 19KT 4729 10985 

HAIL...1.50IN
WIND...60MPH
 
$$

PN

278 
WWUS55 KTFX 100156
SVSTFX

Severe Weather Statement
National Weather Service Great Falls MT
756 PM MDT SAT JUN 9 2018

MTC027-045-100205-
/O.EXP.KTFX.SV.W.0027.000000T0000Z-180610T0200Z/
Judith Basin MT-Fergus MT-
756 PM MDT SAT JUN 9 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JUDITH BASIN AND
WEST CENTRAL FERGUS COUNTIES WILL EXPIRE AT 800 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
central Montana.

LAT...LON 4712 10984 4725 11006 4744 10992 4729 10964
TIME...MOT...LOC 0155Z 221DEG 15KT 4733 10980 

$$

PN

Area Forecast Discussion
National Weather Service Great Falls MT
657 PM MDT Sat Jun 9 2018

...FURTHER UPDATED SEVERE THUNDERSTORM WATCH INFORMATION...

.SYNOPSIS...
A cold front will move through the region tonight, producing
showers and thunderstorms. Some storms could be severe early this
evening. Much colder temperatures will move into the region by
Sunday morning, with snow possible over the higher elevations of
Southwest MT and the Rocky Mountain Front. Generally dry
conditions are expected over the Plains for Sunday afternoon
through Monday, but afternoon highs will be well below normal,
generally in the 50s and 60s.

&&

.DISCUSSION...

Additional updates to Severe Thunderstorm Watch...After coordinating
with the Storm Prediction Center, have expanded the Watch to include
Blaine and Fergus Counties in the eastern portion of the TFX
forecast area. Strong storms moving off the Little Belt Mountains
and north into Hill County are holding together as they approach
Fergus and Blaine Counties, and instability/moisture there appear to
be sufficient to support at least strong storms there. Overall, the
Watch will continue through 9 pm MDT, but will be re-evaluated as to
whether an extension in time is needed.  Coulston

Update to Severe Thunderstorm Watch...Scattered thunderstorms
continue to move northeast from west of the Continental Divide over
the Rocky Mountain Front and central Montana mountain areas.
However, they are much weaker over the last hour or so than
previously, and the airmass seems to be cooling and becoming much
less unstable as a cold front moves into the area. Have therefore
cancelled the Severe Thunderstorm Watch for areas along and east of
Interstate 15. Storms have been developing over the Little Belt
Mountains and north to the Canadian border, so will keep the Watch
going there. Will also monitor thunderstorm potential for
Fergus/Blaine Counties and coordinate with the Storm Prediction
Center for possible Watch expansion into those counties. Coulston

Tonight through Sunday...A strong Pacific cold front is moving
into western Montana. This front will move eastward through the
region tonight. Expect showers and thunderstorms along the front.
Some storms will be severe over portions of Central/North Central
MT, mainly before 9 PM this evening. The airmass is more unstable
as you go east, but no lift at the moment to trigger any storms in
the Lewistown area. That could change later this evening. As
colder air moves into the region tonight, the rain will change to
snow, mainly for elevations above 6000 feet. A winter weather
advisory was issued for the higher elevations for those recreating
that might be unprepared for cold/snow. Temperatures will be
below normal on Sunday along with gusty west winds. Wind speeds
should remain below warning criteria.

For Monday through Wednesday, expect a few showers to exit the
region on Monday, as temperatures climb back above seasonal
normals by Wednesday. Generally dry/quiet conditions expected on
Tue into Wed.

Wed night through Saturday...Another upper level trof will move
through the region, producing a chance for showers/thunderstorms.
Some models indicate isolated areas of heavy rainfall on Thursday.
Temperatures will cool to near normal by the end of the week.
Brusda

&&

.AVIATION...
UPDATED 0025Z.

VFR conditions are mostly expected to continue over the next 24
hours. However, as a cold front currently over a KCTB-KHLN-KDLN line
moves east across the forecast area through 08Z, strong southerly
winds will shift more westerly and decrease somewhat. Scattered
thunderstorms ahead of the front will mainly produce damaging wind
gusts at times, while scattered showers behind the front will be
better rain producers but still with some gusty winds. Precipitation
will become more widespread behind the front, making high MVFR
conditions and mountain obscuration more likely. Ceilings will go
back to VFR generally by 15Z, as westerly winds increase once again
and clouds/showers decrease.  Coulston

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  48  61  41  61 /  80  70  30  20
CTB  44  58  39  58 / 100  40  30  20
HLN  48  59  39  61 /  90  50  30  20
BZN  45  61  35  59 /  50  70  40  20
WEY  38  54  27  53 /  10  30  30  20
DLN  41  55  32  57 /  70  40  30  20
HVR  52  69  43  64 /  40  30  10  20
LWT  48  64  38  58 /  30  20  10  20

&&

.TFX WATCHES/WARNINGS/ADVISORIES...

Winter Weather Advisory from 3 AM to 10 AM MDT Sunday above 6000
feet for Beaverhead...Central and Southern Lewis and Clark...
Gallatin...Jefferson...Madison...Northern Rocky Mountain Front...
Southern Rocky Mountain Front.

&&

http://www.weather.gov/greatfalls

Special Weather Statement
National Weather Service Great Falls MT
510 PM MDT SAT JUN 9 2018

MTZ012-050-054-092345-
Cascade-Judith Basin-Meagher-
510 PM MDT SAT JUN 9 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL MEAGHER...WEST
CENTRAL JUDITH BASIN AND SOUTHEASTERN CASCADE COUNTIES...

At 510 PM MDT, a strong thunderstorm was located 16 miles north of
White Sulphur Springs, moving north at 45 mph.

Wind gusts up to 50 mph and dime size hail are possible with this
storm.

Locations impacted include...
Neihart and Monarch.

This includes Highway 89 between mile markers 10 and 20, and between
mile markers 33 and 59.

LAT...LON 4669 11080 4671 11100 4720 11097 4715 11049
TIME...MOT...LOC 2310Z 191DEG 39KT 4678 11088

KJ

Special Weather Statement
National Weather Service Great Falls MT
553 PM MDT SAT JUN 9 2018

MTZ012-050-100030-
Cascade MT-Judith Basin MT-
553 PM MDT SAT JUN 9 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MEAGHER...WESTERN
JUDITH BASIN AND SOUTHEASTERN CASCADE COUNTIES UNTIL 630 PM MDT...

At 552 PM MDT, Doppler radar was tracking a strong thunderstorm 23
miles northeast of White Sulphur Springs, moving northeast at 55 mph.

Half inch hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Stanford, Geyser and Windham.

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.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
central Montana.

LAT...LON 4671 11050 4674 11056 4677 11056 4677 11062
      4682 11065 4684 11070 4684 11072 4685 11075
      4688 11076 4729 11051 4711 11001
TIME...MOT...LOC 2352Z 204DEG 46KT 4682 11061

PN

Special Weather Statement
National Weather Service Great Falls MT
636 PM MDT SAT JUN 9 2018

MTZ011-045-100100-
Liberty-Hill-
636 PM MDT SAT JUN 9 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN LIBERTY
AND WESTERN HILL COUNTIES...

At 635 PM MDT, radar indicated strong thunderstorms were located
along a line extending from 18 miles north of Chester to 19 miles
northeast of Inverness to 13 miles south of Gildford. Movement was
north at 50 mph.

Wind gusts of 50 to 55 mph and pea size hail are possible with these
storms.

Locations impacted include...
Gildford, Hingham, Simpson and Kremlin.

This includes Highway 2 between mile markers 348 and 363.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4875 10996 4831 11027 4831 11034 4868 11047
      4869 11120 4900 11108 4900 11003
TIME...MOT...LOC 0035Z 200DEG 44KT 4877 11103 4876 11040 4838 11029

Coulston

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
646 PM MDT SAT JUN 9 2018

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

0430 PM     TSTM WND GST     6 NNW SUNBURST          48.96N 111.94W
06/09/2018  M62 MPH          TOOLE              MT   DEPT OF HIGHWAYS

&&

Special Weather Statement
National Weather Service Great Falls MT
708 PM MDT SAT JUN 9 2018

MTZ011-013-100145-
Chouteau-Hill-
708 PM MDT SAT JUN 9 2018

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN LIBERTY...
SOUTHWESTERN HILL AND NORTH CENTRAL CHOUTEAU COUNTIES...

At 708 PM MDT, a strong thunderstorm was located 24 miles south of
Inverness, or 24 miles southeast of Chester, moving north at 45 mph.

Wind gusts of 50 to 55 mph and half inch hail are possible with this
storm.

Locations impacted include...
Inverness, Hingham and Rudyard.

This includes Highway 2 between mile markers 336 and 352.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4855 11027 4810 11059 4816 11082 4818 11083
      4822 11082 4822 11075 4836 11076 4864 11066
TIME...MOT...LOC 0108Z 199DEG 39KT 4820 11068

Coulston

Special Weather Statement
National Weather Service Great Falls MT
710 PM MDT SAT JUN 9 2018

MTZ011-100145-
Hill-
710 PM MDT SAT JUN 9 2018

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT NORTH CENTRAL HILL
COUNTY...

At 710 PM MDT, strong thunderstorms were clustered 18 miles northeast
of Gildford, or 27 miles northwest of Havre, moving north at 45 mph.

Wind gusts up to 50 mph and pea size hail are possible with this
storm.

Locations impacted include...
Simpson.

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.

LAT...LON 4858 11001 4869 11041 4900 11028 4900 10969
TIME...MOT...LOC 0110Z 199DEG 39KT 4881 11013

Coulston