Mount Washington Observatory is a non-profit institution working to advance understanding of the natural systems that create the Earth's weather and climate.

Mount Washington, NH
Summit staff and volunteers gathered outside for a vibrant sunset tonight as mid- and upper-level clouds roll in ahead of this weekend's storm system approaching from off the Carolina coast.
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Meet Kaitlin Farrell, who overcame a fear of tornadoes to become a storm chaser, and now a Summit Intern at our extreme weather station atop Mount Washington! Read Kaitlin's blog post here: mountwashington.org/my-fear-… #mountwashington #weather #stormchaser #internship
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Upper-level clouds will continue to spread in over the region today from the south ahead of a coastal low tracking towards the southern New England coast this weekend. For full forecast details, visit mountwashington.org/forecast
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Our weekly shift change this morning from the upbound crew's point of view featured displays of the vibrant fall foliage nearing its peak on the higher elevations of the White Mountains 🍂
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The top of Mt. Washington was in the clouds overnight as temps plunged into the upper 20s, leaving a fresh coating of rime ice down to about 5800ft. Here's the view at sunrise (23 Sept 2026) looking towards the northern summits of the Presidential Range from our instrument tower.
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Looking down at the southern summits of the Presidential Range and neighboring peaks of the White Mountains at sunset today (22 Sept 2026). #NHwx #NH #mountains #sunset
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Two of our fall interns, Kaitlin and Ellie, were out on the observation deck (pic 1) enjoying the sunrise with a bit of undercast (pic 2) this morning (20 Sept 2026). #NHwx #mountains #sunrise #undercast
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Sunset from the summit of Mt. Washington today (19 Sept 2026). For what to expect on Sunday, please check out our Higher Summits Forecast at mountwashington.org/weather/… #NHwx #NH #mountains #sunset
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Applications are now being accepted for the MWOBS/USFS (MWAC) Joint Internship. We are looking for individuals with interests and skills in meteorology, snow science, and winter recreation to join our teams from January through April. Visit mountwashington.org/internsh… for more info.
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Earlier this shift on Sunday, the summit cleared from the fog in time to reveal a partial undercast to our west as the sun was setting and lighting up the clouds. The summit will be dry today and fog-free as high pressure crests overhead and then shifts offshore.
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September 10th was a notably windy day on the summit. The peak wind gust for the day was 104 mph, which reset the daily wind record (originally 98 mph in 1972). The daily average wind speed of 70.1 mph was our highest since January 12th, and is currently the 4th highest of 2026.
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The first clear night since Wednesday allowed the first unobstructed views of the Honor Summit lights from the summit, seen here backlighting the tower, the parapet, and a vertical shot where the parallel light beams appear to cross. (1/2)
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While clearly viewed from the summit, with a bit of haze down in the valleys and fairly clean air at summit-level, the light beams were not scattered efficiently horizontally, making them difficult to see from distant vantage points.
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We expect good visibility tonight on the 25th anniversary of 9/11. View the Honor Summit Lights on our webcams below… From Wildcat Mountain (likely best view) piped.video/watch?v=JS679d7W… From the Cog Railway piped.video/watch?v=xYbH_qKY… From the Observatory Tower piped.video/watch?v=JuJVUhj9…
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Winter is coming! Early this morning, summit temperatures dipped just below freezing while in the fog, coating our tower instruments in a thin glaze of ice, allowing us to deice for the first time in months!
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Well said, Governor Ayotte. Jack meant so much to @mwobs and the entire Mount Washington community.
With Jack Middleton’s passing yesterday, New Hampshire has lost a great man and an icon in the legal field. Jack practiced law for 70 years, was a litigation expert, President of the New Hampshire Bar Association, a New Hampshire District Court Judge, and a foundational partner at McLane Middleton, where I started my legal career. From his time working up at the Mount Washington Observatory to traveling the globe, Jack was an adventurer. To me, he was also a role model and mentor who knew that attorneys had to give good legal advice but also had to use good judgment. I am thankful for Jack’s impact on my career and for his decades of friendship. My thoughts and prayers are with the entire Middleton family and the McLane Middleton law firm.
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A layer of haze settled below the higher summits before sunset today as high clouds ahead of the next system began rolling in from the west.
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