Friday will be a quieter day with mostly cloudy skies in the morning giving way to partly cloudy skies in the afternoon with highs reaching the low 60s in the valley. Mostly dry conditions are expected, though an isolated shower can’t entirely be ruled out on Friday afternoon. Winds will be light to moderate out of the west/southwest across all elevations.
Saturday will start out dry in the morning with mostly sunny skies, but isolated showers and thunderstorms will become possible by Saturday afternoon and into Saturday night as a low pressure system approaches from the northwest. Sunday is looking more active with isolated morning showers giving way to more widespread shower and thunderstorm activity during the afternoon behind the first of two cold fronts that will arrive around midday. Temperatures will be cooler on Sunday with the rain/snow line ranging from 8,000-9,000 ft.
Late Sunday night or early Monday morning, a stronger cold front will arrive, allowing for snow levels to drop to near or just above the valley floor, so we could see some non-accumulating snowflakes in the town of Jackson on Monday morning. Scattered showers will remain possible throughout the day on Monday with the rain/snow line rising to 7,000-8,000 ft. during the afternoon. Total snow amounts across the mid to higher elevations of the Tetons on Sunday and Monday should range anywhere from 1-5 inches.
Conditions should start to dry out on Monday evening, with Tuesday looking mostly sunny and dry at this time.
Alan Smith, Meteorologist