Grand Teton Forecast Wednesday – Thursday August 11-12

  • 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.

Warming trend continues

Wednesday: Sunny. Afternoon gusts 12-16 mph. Highs in the lower-80’s.

Thursday: Mostly sunny and warm. Light winds. Highs in the mid 80’s.

Smoke forecast: The heaviest smoke in the west will remain to our south for at least the next couple of days. What smoke we will see comes from Washington and British Columbia. Smoke concentrations over Grand Teton Park should remain light through Thursday.

Extended Outlook:

Friday: Mostly sunny and very warm. Highs in the mid to upper 80’s.

Saturday: Mostly sunny and very warm. Slight chance of a late afternoon shower. Highs in the upper 80’s.

Sunday: Mostly sunny in the morning with a chance of afternoon showers. Highs in the mid-80’s.

Monday: Sunny in the morning, then clouding up with a better chance of showers and thunderstorms. Highs around 80 deg.

Tuesday: Mostly cloudy with periods of rain. Some embedded heavier showers and thunderstorms. Highs near 70 deg.

Wednesday: Variable cloudiness with scattered showers. Highs in the low to mid 70’s.

The 6-10 day outlook is now showing below normal temperatures and above average rainfall for northwest Wyoming for the start of the second half of August.

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