Alert archive / Montana / Special Weather Statements in 2016
Special Weather Statement, NWS Missoula, MT
NWS Missoula, MT issued this special weather statement at Aug 8, 2016, 5:45 PM MDT for Powell County, Montana. It was in force for 45 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 8, 2016, 5:45 PM MDT (23:45 UTC)
- Expired
- Aug 8, 2016, 6:30 PM MDT
- In force
- 45 min
- Issued by
- NWS Missoula, MT
County Powell County, MT
The radar
The Missoula radar (KMSX), 59 km from the middle of the area, began a volume at 23:47 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 12:00Z, 11.8 hours before the alert went out and 221 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1661 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</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 8, 2:54 PM MDT, 2 hours 51 minutes earlier.
Area forecast discussion, Aug 8, 2:54 PM MDT, 2 hours 51 minutes before
Area Forecast Discussion National Weather Service Missoula MT 254 PM MDT Mon Aug 8 2016 .DISCUSSION...Increasing cumulus clouds this afternoon and some thunderstorms starting to develop across Lemhi county and central western Montana this afternoon. Expect thunderstorms to develop over the Sapphire mountains and move northeast tonight affecting Philipsburg to Ovando and locations further east. Good shear and moderate instability will help the storms organize and be long lived as they move across the area, however, it is not unstable enough to expect anything but a slight chance of a storm producing large hail or severe winds. Most storms will have wind gusts around 35 to 40 mph and frequent lightning, and most storms will be out of the area by 9pm MDT. Tomorrow the upper level low currently over central Washington will move over northwest Montana causing showers and thunderstorms over much of northwestern and central western Montana. Temperatures will be much cooler with 80s in central Idaho with 70s in most of the valleys of Montana. The low pressure system will begin to slowly exit the region on Wednesday, but rain will likely linger over northwest Montana through most of the day particularly the Glacier park region. Snow levels could drop down to 8000-9000 feet, thus people in the backcountry should expect raw conditions on Wednesday. For Thursday and Friday, lingering instability combined with afternoon heating could lead to the development of afternoon thunderstorms mainly along the Continental Divide and northwest Montana. Any storms that develop will be slow moving and should mainly be anchored over the higher terrain. A brief ridge of high pressure will begin to build over the region on Saturday and will lead to a warm and sunny Saturday with highs approaching 90 degrees for most valleys. Models are hinting at another disturbance moving in Sunday into Monday, which could bring the return of thunderstorms to our area. && .AVIATION...Southwest flow and increasing clouds this afternoon and evening at most area terminals. KBTM will be the exception with some thunderstorms developing this afternoon and evening and moving through with wind gusts 25-35 knots from the southwest expected. KSMN may also be briefly affected by storms this afternoon, though they are expected to develop and move to the northeast quickly. Expect these storms to diminish quickly after sunset. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...None. &&
In the hours before
Special weather statement, Aug 8, 5:14 PM MDT, 31 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 514 PM MDT MON AUG 8 2016 MTZ006-007-043-082345- POTOMAC/SEELEY LAKE REGION MT-BITTERROOT/SAPPHIRE MOUNTAINS MT- BUTTE/BLACKFOOT REGION MT- 514 PM MDT MON AUG 8 2016 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN GRANITE AND SOUTHEASTERN MISSOULA COUNTIES UNTIL 545 PM MDT... AT 513 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 16 MILES NORTHWEST OF PHILIPSBURG...OR 17 MILES SOUTHWEST OF DRUMMOND... MOVING NORTH AT 30 MPH. HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... BEARMOUTH AND NIMROD. 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 4640 11339 4646 11364 4682 11352 4672 11315 TIME...MOT...LOC 2313Z 199DEG 25KT 4655 11346
Special weather statement, Aug 8, 5:45 PM MDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 545 PM MDT MON AUG 8 2016 MTZ006-007-043-090030- POTOMAC/SEELEY LAKE REGION MT-BITTERROOT/SAPPHIRE MOUNTAINS MT- BUTTE/BLACKFOOT REGION MT- 545 PM MDT MON AUG 8 2016 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL GRANITE... SOUTHEASTERN MISSOULA AND WEST CENTRAL POWELL COUNTIES UNTIL 630 PM MDT... AT 545 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 12 MILES WEST OF DRUMMOND...MOVING NORTH AT 25 MPH. NICKEL SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... CLEARWATER...NIMROD...GREENOUGH...GARNET AND BEARMOUTH. 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 4658 11331 4664 11356 4703 11343 4693 11305 TIME...MOT...LOC 2345Z 198DEG 21KT 4668 11341
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 6:36 PM MDT | Special Weather Statement | MSO | Flathead | 39 min |
| Aug 8, 2:06 PM MDT | Fire Weather Watch | MSO | Beaverhead, Jefferson, Madison, Silver Bow | 13 hr |
| Aug 8, 5:14 PM MDT | Special Weather Statement | MSO | Granite | 31 min |
| Aug 8, 5:37 PM MDT | Areal Flood Advisory | MSO | Granite | 53 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.