Alert archive / Montana / Special Weather Statements in 2017

Special Weather Statement, NWS Missoula, MT

July 10, 2017Powell County, Montana

NWS Missoula, MT issued this special weather statement at Jul 10, 2017, 5:38 PM MDT for Powell County, Montana. It was in force for 37 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: Jul 10, 2017, 5:38 PM MDT (23:38 UTC)
Expired: Jul 10, 2017, 6:15 PM MDT
In force: 37 min
Issued by: NWS Missoula, MT

County Powell County, MT

The radar

The Missoula radar (KMSX), 108 km from the middle of the area, began a volume at 23:41 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 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 Missoula, MT wrote its last area forecast discussion before this special weather statement went out at Jul 10, 2:08 PM MDT, 3 hours 30 minutes earlier.

Area forecast discussion, Jul 10, 2:08 PM MDT, 3 hours 30 minutes before

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.
&&

In the hours before

Special weather statement, Jul 10, 4:12 PM MDT, 1 hour 26 minutes before

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, Jul 10, 4:20 PM MDT, 1 hour 18 minutes before

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

Local storm report, Jul 10, 4:37 PM MDT, 1 hour 1 minute before

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Special weather statement, Jul 10, 4:51 PM MDT, 47 minutes before

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Special weather statement, Jul 10, 5:04 PM MDT, 34 minutes before

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Special weather statement, Jul 10, 5:38 PM MDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 6:14 PM MDT	Special Weather Statement	MSO	Powell	46 min
Jul 9, 6:46 PM MDT	Special Weather Statement	MSO	Powell	44 min
Jul 9, 7:06 PM MDT	Special Weather Statement	MSO	Ravalli	39 min
Jul 9, 7:46 PM MDT	Special Weather Statement	MSO	Ravalli	44 min
Jul 9, 8:37 PM MDT	Special Weather Statement	MSO	Deer Lodge	38 min
Jul 9, 9:34 PM MDT	Special Weather Statement	MSO		41 min
Jul 9, 10:17 PM MDT	Special Weather Statement	MSO	Ravalli	43 min
Jul 10, 1:29 PM MDT	Special Weather Statement	MSO	Silver Bow	46 min
Jul 10, 3:12 PM MDT	Severe Thunderstorm Warning	MSO	Silver Bow	33 min
Jul 10, 3:40 PM MDT	Special Weather Statement	MSO	Deer Lodge	35 min
Jul 10, 4:12 PM MDT	Special Weather Statement	MSO	Deer Lodge	33 min
Jul 10, 4:16 PM MDT	Severe Thunderstorm Warning	MSO	Deer Lodge, Powell, Silver Bow	29 min
Jul 10, 4:20 PM MDT	Special Weather Statement	MSO	Silver Bow	25 min
Jul 10, 4:22 PM MDT	Severe Thunderstorm Warning	MSO	Silver Bow	23 min
Jul 10, 4:51 PM MDT	Special Weather Statement	MSO	Deer Lodge	24 min
Jul 10, 5:04 PM MDT	Special Weather Statement	MSO	Ravalli	26 min
Jul 10, 5:45 PM MDT	Special Weather Statement	MSO	Granite	45 min

Nearby

Special Weather Statements in Montana, 2017 Every special weather statement in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.