Special Weather Statement, NWS Missoula, MT

Area Forecast Discussion
National Weather Service Missoula MT
208 PM MDT Mon Jul 10 2017

.DISCUSSION...An approaching disturbance is causing the strong
ridge of high pressure to finally break down. This feature is also
the kicker for convection across Lemhi county into southwest
Montana. The combination of significant instability and more wind
shear will contribute to stronger storms across the
aforementioned region. These storms will be capable of hail, gusty
winds and brief heavy rain.

A few showers will linger throughout the night along the
Continental Divide. Westerly flow will persist over the northern
Rockies through Tuesday keeping the temperatures cooler to near
normal readings.

The heatwave returns by Wednesday, and will last through the
weekend and into early next week. In fact, each day will warm by
5 to 7 degrees or so, with Friday, Saturday, and Sunday topping
out as the hottest days during this particular stretch.
Temperatures will have the potential to reach 100 degrees in valleys
across western Montana and central Idaho on Friday, with an even
greater chance of hitting 100 degrees, or slightly higher
(102-105F), both Saturday and Sunday.

With such strong high pressure locked in place across the western
half of the United States, our forecast models show no
foreseeable break in this hot and dry pattern through at least
July 20th.

&&

.AVIATION...
Scattered to numerous showers and thunderstorms will continue to
develop across Lemhi county into southwest Montana. A few of these
storms could become fairly strong, producing gusty winds, hail and
brief heavy rain. KSMN and KBTM have the best chance of being
impacted by these storms through 11/03z. A few showers will be
traversing northwest Montana this afternoon and evening, but
having a minimal impact to KGPI. A few showers could linger along
the Continental Divide throughout the night.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...None.
&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
400 PM MDT MON JUL 10 2017

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

0329 PM     HAIL             6 SE JANNEY             45.84N 112.41W
07/10/2017  E1.25 INCH       SILVER BOW         MT   PUBLIC

            RESIDENT ON Z BAR T ROAD REPORTED HAIL
            SMALLER THAN GOLF BALLS BUT LARGER THAN
            QUARTERS. DAMAGES INCLUDED TREE BRANCHES
            DOWN AND DENTS OVER THE SURFACE OF CAMPER.
            WIND WAS NOT OVERLY STRONG.

&&

LV

Special Weather Statement
National Weather Service Missoula MT
412 PM MDT MON JUL 10 2017

MTZ007-102245-
Butte/Blackfoot Region MT-
412 PM MDT MON JUL 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DEER LODGE...
SOUTHEASTERN GRANITE...NORTH CENTRAL SILVER BOW AND SOUTHEASTERN
POWELL COUNTIES UNTIL 445 PM MDT...

At 412 PM MDT, Doppler radar was tracking a strong thunderstorm near
Anaconda, moving east at 40 mph.

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

Locations impacted include...
Deer Lodge, Anaconda, Warm Springs, Galen, Lost Creek, Opportunity
and Racetrack.

LAT...LON 4639 11240 4635 11245 4633 11245 4634 11250
      4633 11250 4633 11253 4630 11257 4626 11256
      4624 11260 4622 11257 4618 11257 4618 11251
      4614 11252 4608 11298 4632 11311 4649 11239
      4639 11236
TIME...MOT...LOC 2212Z 251DEG 35KT 4622 11292

Special Weather Statement
National Weather Service Missoula MT
420 PM MDT MON JUL 10 2017

MTZ007-102245-
Butte/Blackfoot Region MT-
420 PM MDT MON JUL 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SILVER BOW COUNTY UNTIL
445 PM MDT...

At 419 PM MDT, Doppler radar was tracking a strong thunderstorm near
Silver Bow, or 7 miles southwest of Butte, moving northeast at 35
mph.

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

Locations impacted include...
Butte, Silver Bow, Walkerville, Janney, Newcomb and Nissler.

LAT...LON 4586 11243 4579 11263 4594 11278 4612 11251
      4610 11247 4607 11247 4605 11248 4602 11244
      4593 11244 4593 11242 4589 11240
TIME...MOT...LOC 2219Z 234DEG 31KT 4592 11262

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