Alert archive / Montana / Special Weather Statements in 2016

Special Weather Statement, NWS Missoula, MT

August 9, 2016Powell County, Montana

NWS Missoula, MT issued this special weather statement at Aug 9, 2016, 9:50 PM MDT for Powell County, Montana. It was in force for 25 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
Aug 9, 2016, 9:50 PM MDT (03:50 UTC)
Expired
Aug 9, 2016, 10:15 PM MDT
In force
25 min
Issued by
NWS Missoula, MT

County Powell County, MT

The radar

The Missoula radar (KMSX), 118 km from the middle of the area, began a volume at 03:53 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.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

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 Aug 9, 2:44 PM MDT, 7 hours 6 minutes earlier.

Area forecast discussion, Aug 9, 2:44 PM MDT, 7 hours 6 minutes before
Area Forecast Discussion
National Weather Service Missoula MT
244 PM MDT Tue Aug 9 2016

.DISCUSSION...A broad area of low pressure in eastern Washington
continues to usher in moisture and instability into the northern
Rockies this afternoon. Thunderstorms have developed across
central Idaho through west central and southwest Montana. Storms
are expected to continue to develop over this area and spread
northward into northwest Montana and along the Continental Divide
into Glacier NP. Storms have and will likely contain hail, gusty
outflows, and local areas of heavy rain.

The upper low will move over northwest Montana tonight. As it
does, expect continued thunderstorm activity and heavy rain
potential in northwest Montana. Glacier NP may be impacted the most
by heavy rain. The upper low will progress northeast into southern
Alberta early Wednesday. Wrap around moisture will occur behind
this low. Expect steady rain and cooler temperatures across the
Canadian border, especially over Glacier NP. A raw, cool
Wednesday is in store with snow levels lowering to around 8000
feet.

Thursday we will be influenced by a cooler northwesterly flow
with a few showers along the Divide.

A change to a warm and dry pattern under a high pressure ridge is
likely Friday and Saturday. A quick moving low pressure trough and
associated cool front will pass through the region Sunday. Expect
breezy conditions late Saturday and Sunday.

The dry pattern with a general westerly flow will continue through
early next week.

&&

.AVIATION...Scattered showers and thunderstorms will impact all
terminals this afternoon and evening. In addition to gusts to 40
mph and local heavy rain, some of the stronger storms may produce
half inch hail. After 10/0600z the upper low will move across
northwest Montana and the focus of most precip will be over KGPI
where showers will persist through Wednesday morning. Thunder
potential will diminish after midnight at KGPI.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...Red Flag Warning until 9 PM MDT this evening East Beaverhead.

ID...&&

In the hours before

Special weather statement, Aug 9, 4:27 PM MDT, 5 hours 23 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
427 PM MDT TUE AUG 9 2016

MTZ007-092300-
BUTTE/BLACKFOOT REGION MT-
427 PM MDT TUE AUG 9 2016

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL GRANITE AND SOUTH
CENTRAL POWELL COUNTIES UNTIL 500 PM MDT...

AT 426 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 12
MILES SOUTHWEST OF GARRISON...OR 14 MILES WEST OF DEER LODGE...MOVING
NORTHEAST AT 30 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
DEER LODGE...GARRISON...JENS...GOLDCREEK...PRINCETON AND BROCK CREEK.

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.

&&

LAT...LON 4629 11301 4641 11320 4673 11290 4653 11258
TIME...MOT...LOC 2226Z 222DEG 25KT 4642 11302

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 6:04 PM MDTSpecial Weather StatementMSOLincoln26 min
Aug 9, 6:40 PM MDTSpecial Weather StatementMSOLincoln35 min
Aug 9, 9:16 PM MDTSpecial Weather StatementMSODeer Lodge29 min

Nearby

Special Weather Statements in Montana, 2016Every special weather statement in 2016

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.