Mount Washington Observatory (MWOBS)

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 Observatory (MWOBS) @MWObs]

SAVE THE DATE 🗓 #NHGives is on June 9-10!
This year, your gift to MWOBS of any amount will be MATCHED 1:1 up to $20,000 from 5:00 p.m. on June 9 to 5:00 p.m. on June 10, so you can double your giving impact. Bookmark our NH Gives page below!

[Mount Washington Observatory (MWOBS) @MWObs]

Summit interns, Aubrey and Aspen, joined this week's summit volunteers, Kally and Eric, by the summit sign to enjoy the colorful sunset views today (6/2/2026).

#NHwx #NH #mountains #sunset #sunsetcolors

[Mount Washington Observatory (MWOBS) @MWObs]

Please consider a donation on our page on June 9 starting at 5pm EST. Thank you for your support! https://t.co/IeqKCbrUPi

[Mount Washington Observatory (MWOBS) @MWObs]

SAVE THE DATE 🗓 #NHGives is on June 9-10!
This year, your gift to MWOBS of any amount will be MATCHED 1:1 up to $20,000 from 5:00 p.m. on June 9 to 5:00 p.m. on June 10, so you can double your giving impact. Bookmark our NH Gives page below!

[Mount Washington Observatory (MWOBS) @MWObs]

Frosty T. Snowman, sporting his nicest scarf, scratched a June bucket list item off by getting a picture taken by the summit sign this morning.

#NHwx #NH #mountains #snow

[Mount Washington Observatory (MWOBS) @MWObs]

Sunrise from the summit of Mt Washington, NH, this morning (31 May 2026). Mixed showers and some thunderstorms are expected today. Full details available at https://t.co/d1cUZjg1E0

#NHwx #NH #mountains #snow #sunrise

[Mount Washington Observatory (MWOBS) @MWObs]

Sunset lighting up our recent snowfall on the summit.

#NHwx #NH #mountains #sunset

[Mount Washington Observatory (MWOBS) @MWObs]

A break in the fog revealed a partial undercast and a wintry-looking summit cone, with 5.9" of snow and sleet recorded over the past 24 hours with the recent storm.

[Mount Washington Observatory (MWOBS) @MWObs]

It's snowing and blowing on the summit this morning. Winter weather will continue through the weekend.

#NHwx #mountains #snow #blowingsnow #snowinMay

[Mount Washington Observatory (MWOBS) @MWObs]

For full details, visit https://t.co/nTW5QhHNSU.

[Mount Washington Observatory (MWOBS) @MWObs]

Join Meteorologist Alex Branton as she discusses this weekend's Higher Summits Forecast. https://t.co/MMp8og8FR3

[Mount Washington Observatory (MWOBS) @MWObs]

Glaze and rime ice on the summit sign this morning. The higher elevations of the White Mountains will continue to see ice and snow this weekend. Full details available at https://t.co/d1cUZjg1E0

#NHwx #NH #mountains #iceicebaby #winterinspring #snowinMay #snow #icy #summitsign

[Mount Washington Observatory (MWOBS) @MWObs]

Winter weather (freezing rain, sleet, snow, rime ice, cold, windy, etc) will be returning to the White Mountains this weekend. Additional details are available at https://t.co/d1cUZjg1E0 (forecast updated twice a day by 6 am and 6 pm)

#NHwx #NH #mountains #snow #winterinspring

[Mount Washington Observatory (MWOBS) @MWObs]

Hike solo, start a team with your family and friends, or get your work crew together! Register today at https://t.co/2bT2bLpqjb

[Mount Washington Observatory (MWOBS) @MWObs]

We’ve hit an exciting milestone for #SeekthePeak 2026! 🎉As of today, 400 participants have signed up for our largest fundraiser of the year— together, you’ve set a new record for May! There’s still plenty of time to seek your peak at https://t.co/A2VXFhpMzl.

[Mount Washington Observatory (MWOBS) @MWObs]

Before the summits descended into the clouds today, our night observer was able to capture a faint rainbow illuminated over station this morning, as the sun briefly peaked out through low-level clouds and freezing rain.

[Mount Washington Observatory (MWOBS) @MWObs]

Another thing to celebrate this Memorial Day weekend is that our building is officially open to tours for the summer! Tours are offered every day except Wednesdays at 11 AM, 1 PM, and 3 PM, and can be booked in advance on our website at https://t.co/DSuNuLTLUU

[Mount Washington Observatory (MWOBS) @MWObs]

Happy Alton Weagle Day from the Mount Washington Observatory! This morning, dozens of people attempted novel or unique ascents of the auto road - by unicycle, go kart, & recumbent bicycle - in honor of Mr. Weagle, whose passion for climbing the summit in new ways spans decades.

[Mount Washington Observatory (MWOBS) @MWObs]

One of the best parts of spring on the higher summits is watching patches of green gradually creep up from the valleys and notches towards the peaks! Pictured here is an early season @cograilway train making its way past Mount Clay and towards the summit.

[Mount Washington Observatory (MWOBS) @MWObs]

Summit interns Kathryn Hawkes, Athena Hendrick, & Alek Libby got to enjoy playing around in the hurricane force winds at sunset tonight, knowing that with summer just around the corner, winds like this are fewer and farther between, but sunsets like this are just getting started!

[Mount Washington Observatory (MWOBS) @MWObs]

Thank you to project partners Mount Washington State Park, @MtWashCogRR, Mt. Washington Auto Road, @AppMtnClub, White Mountain National Forest, Townsquare Media, and the incredible group of students at WPI.

[Mount Washington Observatory (MWOBS) @MWObs]

We are excited to launch our first virtual tour in partnership with undergraduate students at Worcester Polytechnic Institute (WPI) to improve summit accessibility and educational opportunities for the public. Take the tour here: https://t.co/2WedTKbIUK