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Blizzard Conditions Over the Sierra Nevada Mountains; Critical Fire Weather in the High Plains

A strong winter storm across the west is currently producing heavy mountain snow, strong/high winds, and heavy low elevation rain to parts of the Pacific Northwest, Great Basin, California and the northern/central Rockies. Impacts are expected to continue through Sunday. Across the High Plains, strong winds and dry air will support Critical to Elevated fire weather conditions through the weekend. Read More >


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Expected Fire Weather Conditions:

Sunday and Labor Day:  Slightly elevated fire weather conditions across portions of southern WY where gusty southwest winds will combine with afternoon relative humidity in the 20 to 25 percent range. Otherwise the sharp trend of decreasing fire weather conditions will continue as cooler and inclement weather continues Sunday. On Monday most of the precipitation will be confined across northwest and northern Wyoming.  Minor mountain snow accumulations could occur Sunday night and Monday. Please see the special weather statement for more details.

Looking for information about fuel conditions, precipitation and temperature trends, and drought conditions?  You can find it all on our specialized fire weather website.

Evacuations and Closures:

There are local area and trail closures in Grand Teton and Yellowstone national parks.  Please check with national park rangers and/or visitor services for the latest closures and re-openings.  Berry Fire closure maps can be found at  and closure maps for the Yellowstone fires can be found at  All main highways and roads are open in both parks.

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Forecasted Snowfall through Labor Day. Snow levels will
remain above 10500+ feet through Sunday, but lower to
7000-8000 Sunday night/Monday morning.

Forecast precipitation amounts from Saturday night
through the day Monday.
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High Temperatures expected
on Sunday, September 4.

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Minimum Relative Humidity
for Sunday, September 4.

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Maximum Wind Gust
for Sunday, September 4.



One Less Spark Infographics - Click To Enlarge
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