textproduct: Billings

KEY MESSAGES

- Strong gap winds (40-55 mph) in foothills by Monday night. (Livingston/Nye) - Frontal system Tuesday may bring light snow and brisk/strong winds to region.

- Much colder temperatures with light snow possible Friday into weekend.

UPDATE

Weak upslope flow into the Beartooth mountains is persisting longer than the models anticipated this evening. Updated forecast to increase precipitation chances in the Red Lodge and Nye areas through Midnight tonight to account for this. Already seeing pressures start to drop lee of the divide this past hour which signals the beginning of the end of northerly flow into the mountains and the end of snowfall as we get into late tonight. Could see half an inch to an inch of additional snowfall before snow ends tonight in these upslope favored areas, with the heaviest snowfall being in the higher slopes around Red Lodge ski area. Rest of the forecast is in good shape. Warm advection kicks in around sunrise Monday morning with westerly winds becoming predominant during the morning hours. This will bring a warmer and breezy holiday Monday to the region. Chambers

AVIATION

03z Discussion... Upslope winds will keep MVFR to IFR ceilings and light snow over the Beartooth foothills (Red Lodge) through the early morning hours, with mountain obscuration diminishing after 08z. Otherwise VFR ceilings are in place across the area with partial clearing expected in the early morning toward sunrise hours. Light winds will turn westerly over the western foothills around sunrise as pressures fall lee of the divide and cold air retreats into the northern plains. West to southwest winds gusting 20 to 30kts can be expected from Billings west into the mountains, as well as south of Billings into the KSHR vicinity through the day Monday. Northwest winds gusting to 25kts are expected along the eastern state line into the early afternoon hours. Chambers

PRELIMINARY POINT TEMP/POPS

Mon Tue Wed Thu Fri Sat Sun ----------------------------------------------------------- BIL 019/045 031/043 024/037 024/046 015/022 002/012 902/019 00/B 01/E 01/B 01/B 35/S 43/S 22/S LVM 019/042 026/039 020/037 024/045 017/027 004/019 005/030 10/B 01/N 00/B 01/B 35/S 43/S 22/S HDN 015/043 025/042 022/036 017/044 012/023 901/012 905/020 00/B 03/S 11/B 01/B 46/S 55/S 32/S MLS 010/030 019/033 019/027 012/032 006/012 907/004 910/012 00/E 02/S 11/B 01/E 34/S 43/S 21/B 4BQ 012/034 021/036 021/029 015/039 011/021 901/010 905/017 00/B 03/S 11/B 00/B 24/S 42/S 21/B BHK 000/022 011/027 012/021 005/027 000/010 912/002 913/007 00/E 14/S 31/Q 00/B 33/S 43/S 21/B SHR 013/041 019/039 017/033 014/045 011/025 903/014 905/025 00/B 03/S 01/N 01/B 24/S 43/S 21/B

BYZ WATCHES/WARNINGS/ADVISORIES

MT...None. WY...None.