textproduct: Billings

KEY MESSAGES

- Scattered showers and thunderstorms through early evening. Severe thunderstorms expected over southeastern Montana and north central Wyoming. Widespread damaging wind threat possible Rosebud County eastward late today.

- Mainly dry Monday; then a daily chance of showers and thunderstorms rest of the work week.

UPDATE

A Severe Thunderstorm Watch has been issued for Sheridan County Wyoming and Big Horn, Treasure, Rosebud, Powder River, Carter, Custer, and Fallon Counties in Montana. The main threat with these storms will be strong winds up to 85 mph and large hail up to 2 inches in diameter.

AVIATION

18z UPDATE...

Confidence is increasing that a line of severe thunderstorms will form around KBIL/KSHR between 18-19z and quickly strengthen and move eastwards. Sites such as KMLS/KBHK/K00U may see erratic winds of up to 60 kts, localized hail, LIFR VIS, and frequent lightning. The greatest risk for KMLS/KBHK is between 21z and 03z. WMR

12z Discussion...

Areas of MVFR stratus have developed west of KMLS-K00F early this morning. Through daytime mixing these low clouds should dissipate by 14-16z. Showers w/ a few weak t-storms in the far west this morning may produce local MVFR near KHWQ & KLVM, while mountains are occasionally obscured.

Scattered thunderstorms are expected this afternoon and early evening. Some storms (mainly from Billings eastward) may be severe and produce large hail and strong winds, along with brief heavy rain (MVFR/IFR expected in heavier showers). Peak timing for TS today is from 19z to 02z. An afternoon cold front will bring breezy NW-N winds across the region into the evening, with widespread gusts of 25-35kts. VFR will prevail and winds will decrease late tonight as high pressure builds back over the region.

JKL

PRELIMINARY POINT TEMP/POPS

Tdy Mon Tue Wed Thu Fri Sat ------------------------------------------------------- BIL 077 044/076 054/078 050/068 048/074 050/075 049/069 7/T 10/B 02/T 62/T 31/N 11/U 23/T LVM 069 035/073 048/069 039/061 036/069 041/071 041/065 4/T 00/B 19/T 95/T 31/N 12/T 24/T HDN 078 042/078 052/080 048/070 045/073 046/075 047/069 8/T 20/B 02/T 74/W 42/W 11/U 23/T MLS 081 046/075 055/082 052/069 048/070 049/073 048/069 8/T 80/B 11/E 43/W 33/T 11/U 13/T 4BQ 084 046/077 058/085 050/068 047/070 048/074 048/068 8/T 80/B 12/T 84/T 33/W 01/B 23/T BHK 084 044/073 053/084 049/068 045/068 045/071 044/067 8/T 80/U 12/T 54/T 54/T 12/T 13/T SHR 081 040/078 049/081 043/064 041/070 043/072 044/065 8/T 51/B 03/T 78/T 43/T 12/T 24/T

BYZ WATCHES/WARNINGS/ADVISORIES

MT...Severe Thunderstorm Watch 285 in effect until 10 PM MDT this evening FOR ZONES 30>33-36-37-57-58-138-139-169-171. WY...Severe Thunderstorm Watch 285 in effect until 10 PM MDT this evening FOR ZONES 198-199.