textproduct: Billings

KEY MESSAGES

- Some thunderstorms may become strong to severe in SE Montana and NE Wyoming this afternoon and evening.

- Main threats with severe thunderstorms today are large hail, strong winds, and heavy rain. Secondary threat is isolated tornadoes over far south-eastern Montana.

- Isolated to scattered showers and thunderstorms Saturday with a late today cold front. A few thunderstorms may become strong to severe over eastern Montana.

- Daily chance of showers and thunderstorms continues Sunday into next week.

UPDATE

Updated for Severe Thunderstorm Watch now in effect for Custer, Carter, Fallon, and Powder River Counties until 9 PM this evening. Chambers

AVIATION

18z Discussion...Threat to aviation interests today through tomorrow morning will be scattered convection this afternoon through this evening, and fog potential in the sunrise hours. Isolated morning convection over SE Montana will continue to shift eastward through the early afternoon hours, potentially bringing some MVFR conditions to KMLS/KBHK, along with isolated wind gusts to 35kts. Scattered showers and stronger thunderstorms are expected to develop over central areas of the forecast area (KBIL) around 20z, and shift eastward through the evening hours. Stronger storms during this period may produce IFR conditions in heavy rain, along with large hail and wind gusts over 50kts. Convection should exit to the east of the forecast area between 05-07z tonight. By the early morning hours, locations that received significant precipitation could see localized fog development (IFR or lower) lasting until 16z tomorrow morning. Chambers

PRELIMINARY POINT TEMP/POPS

Fri Sat Sun Mon Tue Wed Thu ----------------------------------------------------------- BIL 052/088 057/087 055/071 046/080 055/083 054/079 052/074 20/U 00/B 25/T 31/B 11/B 45/T 54/T LVM 044/085 049/084 047/067 037/074 045/075 044/070 041/065 20/U 02/T 37/T 41/B 12/T 47/T 66/T HDN 048/088 054/090 053/073 044/082 053/084 052/081 050/075 20/U 00/B 15/T 40/U 11/B 34/T 54/T MLS 050/085 058/092 057/075 047/079 057/085 057/083 055/076 40/U 00/U 32/W 41/U 21/B 22/T 53/W 4BQ 050/086 059/096 058/077 048/080 058/089 057/085 054/078 50/U 01/U 31/B 51/U 11/B 22/T 43/W BHK 047/082 055/092 056/078 045/076 053/087 056/085 054/078 60/U 00/U 31/B 41/U 11/B 22/T 43/T SHR 045/087 050/094 052/074 042/081 050/086 050/082 047/074 30/U 01/B 17/T 61/U 01/B 24/T 54/T

BYZ WATCHES/WARNINGS/ADVISORIES

MT...Severe Thunderstorm Watch 272 in effect until 9 PM MDT this evening FOR ZONES 32-33-36-37. WY...None.