Grand Teton Forecast Monday – Tuesday August 30-31

  • 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.

Two warm – but smoky – days; showers return starting Wednesday

Monday: Mostly sunny. Southwesterly winds gusts 22-26 mph in the afternoon. High temperature around 80 deg.

Tuesday: Mostly sunny. Windy in the afternoon with gusts 28-34 mph. High temperature around 80 deg.

Smoke forecast: Unfortunately the upper level winds have shifted and we will return to a smoky pattern as the California fires continue to burn. Increasing wildfire smoke over the Park Monday, with smoke becoming heavy by evening. Tuesday will have moderate to heavy smoke.

Extended Outlook:

Wednesday – Sunday: Mostly sunny in the mornings but with a chance of showers each afternoon. Showers will be most numerous on Friday. High each day in the low 70’s.

Extended outlook through the first third of September: Temperatures will be near or slightly below the long-term average for this time of year. It will be drier than normal.

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