Grand Teton Forecast Saturday – Sunday August 14-15

  • Short-term forecast, emphasizing weather parameters most important to visitors in the Jenny Lake / String Lake / Leigh Lake region
  • Animations of expected weather radar updated daily.
    • Other weather parameters (snow, wind, etc.) added when they may be significant.
    • For orientation, animation maps show Wyoming and a small portion of the surrounding states.
  • Temperature graphic is for the Airport. Subtract a couple of degrees for String Lake and 3-5 degrees if a visitor asks about Colter Bay.
  • The wind gusts forecasts are usually (in the summer) a reasonable forecast for average sustained wind speeds at 9,000 – 11,000 feet for backcountry hikers.
  • For those with access to Grand Teton Park Radios: Channel 16 is NOAA Weather Radio
  • Click here for access to the NOAA smoke-forecasting site.
  • Click here for an animation of smoke concentration over the northwest U.S. for the next two days.

A hot and smoky weekend – then cooling down by midweek

Saturday: Mostly sunny and hot. Some scattered afternoon showers to the east of the Park. Moderate afternoon breezes with gusts 12-18 mph. Highs near 90 deg.

Sunday: Mostly sunny and a not quite as hot as Saturday. Scattered showers east of the Park. Moderate afternoon breezes with gusts 12-18 mph. Highs in the mid to upper 80’s.

Smoke forecast: Heavy smoke is to the west of Grand Teton. Saturday will see moderate smoke, similar to what we experienced on Friday. The smoke concentration increases on Sunday, especially in the afternoon, as heavy smoke moves into the Tetons.

Extended Outlook:

Monday: Sunny in the morning, then clouding up with scattered showers and thunderstorms. Highs in the mid-80’s.

Tuesday: Variable cloudiness with afternoon scattered showers and thunderstorms likely. Breezy. Highs in the lower 80’s.

Wednesday: Mostly cloudy with periods of rain, showers, and an occasional thunderstorm. Breezy. Highs near 70 deg.

Thursday-Friday: Variable cloudiness with morning fog and a chance of afternoon showers. Highs around 70 deg.

Saturday: Partly cloudy. Highs in the low to mid 70’s.

Leave a Reply