Area Forecast Discussion
Issued by NWS Glasgow, MT
Issued by NWS Glasgow, MT
479 FXUS65 KGGW 222059 AFDGGW Area Forecast Discussion National Weather Service Glasgow MT Issued by National Weather Service Billings MT 259 PM MDT Thu May 22 2025 .DISCUSSION... .KEY MESSAGES... - An upper level disturbance will move in this evening to bring rain showers and isolated thunderstorms tonight to mainly the southern zones, with accumulating rainfall possible. Precipitation chances decrease into Sunday with spotty showers. - A Lake Wind Advisory for Fort Peck Lake remains in effect for gusty east winds tonight. && .DISCUSSION... WEATHER PATTERN OVERVIEW: A disturbance moving northeast out of ID will bring showers and isolated thunderstorms through mainly Friday evening. Northeast of Whitewater to Sidney line stand to receive very little if any rainfall from this system. Greatest amounts will be near and south of a Jordan line with amounts of a third to a half an inch a good possibility. The disturbance will then drift to our south Saturday and toward the central Plains next week. An upper trough will move through the Pacific NW Monday but lift up into Canada next week, leaving northeast Montana mainly dry. Chances for rainfall for the remainder of the period look slim as an upper ridge tries to build in over the area. This will eventually allow temperatures to warm to above normal levels by the middle or the later portion of next week with dry conditions. && .AVIATION... A round of showers and MVFR ceilings will move into the TAF site late tonight and Friday. Better conditions are expected at KSDY but low ceilings elsewhere are expected to continue into Saturday. East to SE winds of 10-20 kts will continue through Friday. && .GGW WATCHES/WARNINGS/ADVISORIES... Lake Wind Advisory from 6 PM this evening to 4 AM MDT Friday for Central and Southeast Phillips-Central and Southern Valley- Garfield-McCone-Petroleum. && $$ weather.gov/glasgow