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
Joined October 2010
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A clearing trend yesterday revealed the extent of the ghostly #rimeice deposited on Halloween. However, the rime ice isn't expected to stick around, with some models suggesting we will challenge daily record high temperatures later this week.
A couple more pictures from yesterday's MWOBS #Halloween celebration, featuring 5 pumpkins carved by summit staff and Nimbus's Halloween costume (he dressed up as intern Ellie).
Which carved pumpkin is your favorite?
A scarecrow, a cool gorilla, a T-Rex, Nimbus the cat, and a penguin walk into a weather station...
#HappyHalloween from the Mount Washington Observatory!
We are excited to offer a new broadcast meteorology internship at MWOBS! These interns will have the unique opportunity to expand MWOBS’ forecasting and weather-focused content production for a range of media platforms. For more information, visit mountwashington.org/internsh…
The 2027 Mount Washington Observatory calendars are available at lulu.com/spotlight/mwo231
Order NOW and use the code EARLY20 at checkout to get 20% off your order! Code EXPIRES at 2359 EDT on 10/30!
Pick up your favorite today and enjoy a year of Mount Washington images! 🏔️📅🐱
The sky lit up at sunrise this morning as a series of fuel trucks made their way up the auto road, delivering the fuel that will help power backup generators and keep weather observers and state park staff warm through the winter. #nh #mwobs #mountwashington #winteriscoming
There were mostly clear skies at sunrise this morning, allowing the shadow of Mount Washington to appear particularly prominent on small patches of valley fog. Mostly sunny skies and dry conditions will persist through the weekend before a cold front approaches on Monday.
The high-level clouds lit up around sunset this evening. These clouds will thicken and lower overnight, with intermittent fog possible tomorrow afternoon.
For more forecast details, please visit mountwashington.org/forecast.
#MWOBS #sunset #nhwx
The weekend began with 2.3 inches of fresh snowfall, but ample sunshine, low humidity, and above-freezing temperatures over the past few days have nearly returned the ground to bare rocks.
#NHwx #NH #mountains #snow #WhiteMountainsNH
We are excited to offer a new broadcast meteorology internship at MWOBS! These interns will have the unique opportunity to expand MWOBS’ forecasting and weather-focused content production for a range of media platforms. For more information, visit mountwashington.org/internsh…
Looking towards Mt. Clay, Jefferson, Adams, and Madison at #sunset today (19 Oct 2026).
#mountains #NHwx #snow #whitemountainsNH
Golden hour light this afternoon (18 Oct 2026), looking down at Mt. Monroe and the neighboring Lakes of the Clouds.
#NHwx #Mountains #snow #goldenhour #mtmonroe
Looking down at the southern summits of the Presidential Range (Monroe, Franklin, Pierce, Jackson, and Webster) at sunset today (17 Oct 2026).
#NHwx #NH #mountains #snow #sunset
We're looking for two educators to plan and implement our K-12 weather education programs. Learn more about the STEM Programs Manager and Lead STEM Programs Educator roles at the link below!
mountwashington.org/about-us…
#stemeducation #mountwashington #weatherscience
Our neighbors at Mount Washington State Park posted on Facebook/Instagram that their facilities are now closed for the winter season (see their post in the attached image or visit facebook.com/NewHampshireSta…)
The weather tower aglow in yesterday's sunrise, with a few remnants of rime ice hanging on before being gobbled up by today's warm, wet fog. Behind the tower off to the west you can see the shadow of Mount Washington, cast by the rising sun. #nh #mountwashington #sunrise #mwobs
The summit burst out of the fog this morning and was treated to pretty spectacular snoliage! Temperatures will rise well above freezing tomorrow, however, melting much of the rime ice we've been able to accumulate over the past several days. #nh #mountwashington #snoliage
