Grand Teton Forecast Thursday – Friday 2-3 September

  • 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.

Showers and thundershowers later today, then the dry spell resumes…

Thursday: Mostly sunny. Chance of an afternoon or evening thunderstorm. Afternoon wind gusts 15-20 mph except higher near thunderstorms. Highs in the mid 70’s. Occasional thunderstorms may continue throughout the night.

Friday: Chance of a morning shower, then clearing throughout the day. Highs around 70 deg.

Smoke forecast: The smoke, mostly from California, will continue over the Park. Little change over the next two days with periods of moderate to heavy smoke.

Extended Outlook:

Saturday: Mostly sunny. Highs in the low 70’s.

Sunday: Mostly sunny. High in the mid 70’s.

Monday – Wednesday: Mostly sunny. Highs near 80 deg.

Extended outlook through the first half of September: Above normal temperatures and below normal precipitation through the first 10 days. Then turning cooler but likely remaining dry.

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