textproduct: Billings

KEY MESSAGES

- Areas of fog through this morning, dense at times. Prepare for reductions to visibility.

- High confidence for widespread precipitation later today through Monday. Snowfall in the Absaroka/Beartooths and Bighorns and rain across the lower elevations. Record daily precipitation amounts for the month of November possible for some locations.

- Windy conditions on Monday, gusts 25 to 45 mph. A few gusts of 50 mph or higher in Southeast Montana and Northern Wyoming.

UPDATE

Ground observations indicate areas of dense fog have spread west toward the foothills. We have expanded the Dense Fog Advisory into Stillwater County and portions of Park, Sweet Grass and Carbon Counties. It appears the fog and stratus will be quite stubborn to improve until late morning. If we see any breaks they may be brief in the early afternoon before precipitation and moisture spread up from the south with the approaching weather system. BT

AVIATION

Areas of IFR/LIFR will be common across the forecast area due to stubborn stratus ceilings and fog. Patchy freezing drizzle cannot be ruled out through the morning, but the chance is too low to include in TAFs at this time. It appears the fog and stratus will be stubborn to improve at most locations this morning. We may see a period of IFR/MVFR briefly at some sites in the west (ie KLVM, KBIL) around midday before precipitation moves in again late in the day reducing flight categories again. Mountains will be obscured through the period. Winds will generally be light and variable across the region...but pick up tonight out of the N/NW. BT

PRELIMINARY POINT TEMP/POPS

Tdy Mon Tue Wed Thu Fri Sat ------------------------------------------------------- BIL 047 041/054 033/058 035/054 033/058 034/057 035/055 9/W +8/R 00/U 00/B 00/B 11/B 31/U LVM 047 033/048 026/057 031/053 028/054 027/053 026/051 8/W +5/O 00/B 00/B 01/B 11/B 40/U HDN 052 037/052 025/060 027/056 025/058 028/058 032/056 7/W ++/R 00/U 00/B 00/B 11/B 31/U MLS 054 041/049 030/056 031/053 029/054 032/055 035/053 8/W ++/R 00/U 00/B 00/B 01/U 21/B 4BQ 058 041/047 031/055 031/054 030/056 033/057 036/051 9/W 9+/R 20/U 00/B 00/B 01/U 32/W BHK 058 040/051 027/052 027/054 026/054 028/055 030/051 3/W ++/R 20/U 00/B 00/B 00/B 21/N SHR 051 032/046 025/059 028/055 026/058 028/058 030/054 5/W +9/R 10/U 00/B 00/U 11/U 32/W

BYZ WATCHES/WARNINGS/ADVISORIES

MT...Dense Fog Advisory in effect until noon MST today FOR ZONES 29>34-36-37-42-56>58-65-66-138-141-170-173-235. Winter Storm Watch in effect from this evening through Monday evening FOR ZONE 171. WY...Dense Fog Advisory in effect until noon MST today FOR ZONE 199. Winter Storm Watch in effect from this evening through Monday evening FOR ZONE 198.