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Higher Summits Forecast

Mountain weather is subject to rapid changes and extreme conditions. Always be prepared to make your own assessment of travel and weather conditions. This outlook is one tool to help you plan a safe trip. Always travel with adequate clothing, shelter, food, and water.
Wednesday, July 23, 2014
4:21 AM
Severe afternoon/evening thunderstorms possible w/ heavy rain, large hail, and violent winds...

High pressure will continue to slide offshore this morning, pumping warm, moist air in over the region ahead of a strong cold front expected to arrive this afternoon. Ahead of the approaching front, convective cells will pop up around the region, initially bringing scattered rain showers. But as the front itself approaches, models are in agreement that strong convective cells will form with multi-cellular structures likely forming and some cells possibly even becoming isolated supercells. All of this will translate into heavy rain, large hail, violent winds, and frequent lightning. The heavy rain will be sudden possibly leading to localized flooding in neighboring ravines and swollen river crossings at lower elevations. Larger hail formation could reach up to an inch or more in diameter and might fall with high velocities. Downdrafts and line driven winds could come down suddenly and without notice with gusts reaching hurricane force or even triple digits under some cells. With fog expected above tree line, these thunderstorm formations will be obscured with thunder drowned out by wind, meaning they will arrive with little to no warning making it difficult to seek shelter or a proper lightning stance.

This line of severe weather is expected to continue into the evening before tapering late overnight as the front exits and atmospheric conditions once again stabilize. Some upslope showers and fog will linger early on Thursday but a building high from the west will allow for a general clearing trend on and above the summits for the afternoon. Temperatures overnight into Thursday will also be noticeably cooler as northern air moves in behind todays passing front.

Ryan Knapp
Staff Meteorologist


Mostly in the clouds under mostly cloudy skies w/ afternoon showers and thunderstorms, possibly severe.

Highs: around 60 °F

Wind: W 45-60 mph decreasing to 35-50 mph w/ higher gusts


In the clouds w/ showers and thunderstorms, possibly severe.

Lows: mid 40s °F

Wind: W shifting NW 35-50 mph w/ higher gusts then decreasing to 20-35 mph


In and out of the clouds under mostly cloudy skies trending towards clearing. Chance of morning rain showers.

Highs: lower 50s °F

Wind: NW 15-30 mph

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