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The Sierra Crest is noted for having the capacity to produce four seasons of weather during a single Summer Day. Rain, snow, hail, fog, lightening, and a bit of sunshine can all happen in quick sequence.

The High Sierras are noted for rapid changes in weather and temperature, and the sudden appearance of harsh weather trends. You may experience anything from intense heat to bitterly cold Summer snow storms. Or you may not.
In any case, weather must be considered and preparations made to deal with these weather facts BEFORE entering the High Sierras.

Long Distance Backpackers who were on the High Sierra Crest in early August of 2009 (and July of 2015) experienced just such a series of Summer Snow Storms.

Temperatures dropped to the high teens and low twenties, snow and hail fell which partially obscured the trails, and all of those who entertained the misconception that the Sierras only have fine weather during the Summertime were bitterly disappointed.

Luckily for the many backcountry travelers who were not properly prepared, those storms blew apart, rather than consolidated and deepened.

(The 2015 storms had their way)

Weather considerations should guide your gear selection.

Weather Preparations for Backcountry Travel

All Seasons

1st:
Tahoe to Whitney
Complete High Sierra Weather Resources

Next, check the National Weather Service Satellites

The NWS Satellites will give you an orbital view of potiential storm activity. Combined with your use of the NWS Maps and Forecasts, you can prepare yourself for the likely weather. Note: especially check the 28km infrared and water vapor animations, which require Java Script.

Check the National Weather Service Maps

NWS Maps Note: Especially Check the 24 to 48 Hour fronts and Precipitation Maps.

The National Weather Service Home Page displays large and small scale weather warnings which may pertain to your High Sierra backpacking plans.

All these resources, and more, are found on the Tahoe to Whitney Complete Highe Sierra Weather resources page.

U.S. Geological Survey
Department of the Interior

The
USGS

USGS MAP LOCATOR

Use search term "Meeks Bay," and "Address," as search type to locate this USGS map.

USGS Topographic
Map Symbols Information

Have a great Sierra Nevada route or trip to
Investigate or Relate?

Post it on
TahoetoWhitney.Org
The Backpacker's Forum.

Experiences, comments, or pictures about High Sierra Weather?
Let it Rip HERE:

North Sierra Weather Forum