Alert archive / Montana / Special Weather Statements in 2017
Special Weather Statement, NWS Missoula, MT
NWS Missoula, MT issued this special weather statement at Jul 14, 2017, 3:59 PM MDT for Deer Lodge County, Montana. It was in force for 46 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 14, 2017, 3:59 PM MDT (21:59 UTC)
- Expired
- Jul 14, 2017, 4:45 PM MDT
- In force
- 46 min
- Issued by
- NWS Missoula, MT
County Deer Lodge County, MT
The radar
The Missoula radar (KMSX), 132 km from the middle of the area, began a volume at 22:03 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, 10.0 hours before the alert went out and 234 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
- 3013 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 25 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 Jul 14, 2:21 PM MDT, 1 hour 38 minutes earlier.
Area forecast discussion, Jul 14, 2:21 PM MDT, 1 hour 38 minutes before
Area Forecast Discussion National Weather Service Missoula MT 221 PM MDT Fri Jul 14 2017 ...Thunderstorms with gusty winds Saturday... .DISCUSSION...Moisture that was previously in Nevada is moving north through southern Idaho and will help initiate a few gusty thunderstorms later this afternoon and evening. Simulated radar loops show most of the thunderstorms to move through Lemhi County and southwest Montana but some of the outflow winds could make it to Missoula this evening. Saturday remains the day with the highest potential for widespread thunderstorms. A few storms may move through northwest Montana during the morning, but the afternoon is the main focus for strong storms region-wide. Gusty winds and lightning are the main threats with storms but brief heavy rain and small hail will also become possible by the late afternoon. Sunday will be around 10 degrees cooler than Saturday due to the passage of a cold front. Winds are expected to become gusty by Sunday afternoon as well, so fire weather conditions may become critical in portions of the region. Much drier air is expected with the cold front passage which will lead to cool temperatures Monday morning. Near normal to slightly above normal temperatures are still expected next week as the upper level ridge flattens. Thunderstorms are possible on Monday but Tuesday now looks to have lower thunderstorm chances. && .AVIATION...A plumb of monsoon moisture is moving through southern Idaho and into southwest Montana this afternoon. Thunderstorms are beginning to develop in the aforementioned areas and will continue through the evening. The main threats with today's thunderstorms are lightning and gusty winds. A few storms may produce wind gusts over 50kts with the main threat between 14/2200Z-15/0400Z. Although most shower activity will diminish after sunset, another weak disturbance may set off isolated showers and thunderstorms early Saturday morning mainly north of I-90. && .FIRE WEATHER...An area of thunderstorms is expected to sweep north this evening...across mainly the eastern Clearwater mountain and areas east and southeast of that. Gusty winds can be expected with these storms. For Saturday, deep moisture will be present, resulting in more thunderstorms, but a better chance of rainfall with them. By Sunday, a cooler and breezy westerly flow will develop with drier air returning to the area. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...None. &&
In the hours before
Special weather statement, Jul 14, 3:59 PM MDT, 0 minutes before
Special Weather Statement National Weather Service Missoula MT 359 PM MDT FRI JUL 14 2017 MTZ007-142245- Butte/Blackfoot Region MT- 359 PM MDT FRI JUL 14 2017 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DEER LODGE...NORTH CENTRAL SILVER BOW AND SOUTHERN POWELL COUNTIES UNTIL 445 PM MDT... At 359 PM MDT, Doppler radar was tracking a thunderstorm over Anaconda, moving east at 10 mph. Winds in excess of 40 mph will be possible with this storm. Locations impacted include... Anaconda, West Valley, Warm Springs, Gregson Hot Springs, Lost Creek, Crackerville and Opportunity. LAT...LON 4599 11303 4616 11313 4629 11282 4604 11268 TIME...MOT...LOC 2159Z 248DEG 9KT 4610 11299
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 6:13 PM MDT | Special Weather Statement | MSO | Powell | 32 min |
| Jul 13, 6:47 PM MDT | Special Weather Statement | MSO | Powell | 28 min |
| Jul 13, 6:48 PM MDT | Special Weather Statement | MSO | Powell | 27 min |
| Jul 13, 7:37 PM MDT | Special Weather Statement | MSO | Deer Lodge | 23 min |
| Jul 13, 8:48 PM MDT | Special Weather Statement | MSO | Deer Lodge | 27 min |
| Jul 13, 9:17 PM MDT | Special Weather Statement | MSO | Deer Lodge | 28 min |
| Jul 13, 9:44 PM MDT | Special Weather Statement | MSO | Granite | 31 min |
Nearby
Special Weather Statements in Montana, 2017Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.