Marc Alessi
@marc-alessi.bsky.social
PhD Climate Scientist | Science Fellow, Union of Concerned Scientists | Colorado State/Cornell alum | Syracuse, NY | opinions my own #JoinYourUnion
It got down to -22F at Saranac Lake Airport last night 🧊
December 5, 2025 at 6:44 PM
It got down to -22F at Saranac Lake Airport last night 🧊
Thursday night temps 👀👀👀
December 2, 2025 at 4:39 PM
Thursday night temps 👀👀👀
Was checking out the snowfall totals on CoCoRaHS from the lake effect event on Friday... I didn't realize that some locations got over a foot in Madison and Oneida counties! I ended up with about 8 inches in the city of Syracuse
December 1, 2025 at 7:24 PM
Was checking out the snowfall totals on CoCoRaHS from the lake effect event on Friday... I didn't realize that some locations got over a foot in Madison and Oneida counties! I ended up with about 8 inches in the city of Syracuse
The US dodged a bullet this year with no direct hit by a hurricane… especially during the government shutdown. Huge props to the forecasters at the NHC who worked without pay (and the hurricane hunters!)
November 30, 2025 at 11:26 PM
The US dodged a bullet this year with no direct hit by a hurricane… especially during the government shutdown. Huge props to the forecasters at the NHC who worked without pay (and the hurricane hunters!)
We even got that Georgian Bay connection today 😍
November 28, 2025 at 7:20 PM
We even got that Georgian Bay connection today 😍
Wind at surface (with temp) and at 750 mb according to GFS
November 10, 2025 at 1:56 PM
Wind at surface (with temp) and at 750 mb according to GFS
So cool: northerly wind at the surface bringing in lake effect snow from Lake Ontario, and southerly wind higher up in the atmosphere bringing in snow from the south. Two different types of snow ❄️
November 10, 2025 at 1:56 PM
So cool: northerly wind at the surface bringing in lake effect snow from Lake Ontario, and southerly wind higher up in the atmosphere bringing in snow from the south. Two different types of snow ❄️
Wore my rejecting kings shirt to the gym today 😤 love feeling hopeful
November 5, 2025 at 3:42 PM
Wore my rejecting kings shirt to the gym today 😤 love feeling hopeful
Just plotted the 58 METAR stations that are expected to stop reporting observations due to the FAA ending their contracts. Overlaid the counties in NC that issued a disaster declaration after Hurricane Helene last year.
November 4, 2025 at 4:55 PM
Just plotted the 58 METAR stations that are expected to stop reporting observations due to the FAA ending their contracts. Overlaid the counties in NC that issued a disaster declaration after Hurricane Helene last year.
Going to be a gusty Halloween evening for trick or treaters! 7pm ET forecast has gusts near 50 mph in Syracuse 🌬️
October 31, 2025 at 2:00 PM
Going to be a gusty Halloween evening for trick or treaters! 7pm ET forecast has gusts near 50 mph in Syracuse 🌬️
Some much needed rain working through CNY
October 30, 2025 at 3:40 PM
Some much needed rain working through CNY
The irony of not having access to your own journal article 😭
October 29, 2025 at 2:35 PM
The irony of not having access to your own journal article 😭
I hope you'll join me in canceling your Spotify subscription. Absolutely sickening stuff.
October 29, 2025 at 2:19 PM
I hope you'll join me in canceling your Spotify subscription. Absolutely sickening stuff.
Melissa turning more northerly in the last few frames as it approaches Jamaica-- more of a wobble? Effects of the eyewall will reach Montego Bay shortly...
October 28, 2025 at 3:36 PM
Melissa turning more northerly in the last few frames as it approaches Jamaica-- more of a wobble? Effects of the eyewall will reach Montego Bay shortly...
This type of -80C cloud top symmetry for an Atlantic hurricane? Just insane
October 28, 2025 at 2:12 AM
This type of -80C cloud top symmetry for an Atlantic hurricane? Just insane
Cat 5, 175 mph Hurricane Melissa starting its northward turn toward Jamaica ☹️
October 27, 2025 at 6:58 PM
Cat 5, 175 mph Hurricane Melissa starting its northward turn toward Jamaica ☹️
Absolutely crazy Melissa won’t make landfall in Jamaica until Tuesday morning… how many eyewall replacement cycles and wind field expansions will it undergo before then?
October 26, 2025 at 1:33 PM
Absolutely crazy Melissa won’t make landfall in Jamaica until Tuesday morning… how many eyewall replacement cycles and wind field expansions will it undergo before then?
Jamaica will deal with hurricane force winds, storm surge, and intense rain for not just hours, but days. The storm is then expected to cross Jamaica. Rainfall totals over 30 inches are possible
October 25, 2025 at 1:14 PM
Jamaica will deal with hurricane force winds, storm surge, and intense rain for not just hours, but days. The storm is then expected to cross Jamaica. Rainfall totals over 30 inches are possible
We are on the verge of a major humanitarian disaster for Jamaica and southern Haiti. Melissa is expected to rapidly intensify into a category 4 hurricane while moving slowly along the Jamaican coast…. www.hurricanes.gov
October 25, 2025 at 1:14 PM
We are on the verge of a major humanitarian disaster for Jamaica and southern Haiti. Melissa is expected to rapidly intensify into a category 4 hurricane while moving slowly along the Jamaican coast…. www.hurricanes.gov
Folks, please only get your forecasts from the National Hurricane Center where the experts are (www.hurricanes.gov). Here's the latest Melissa forecast:
October 23, 2025 at 7:23 PM
Folks, please only get your forecasts from the National Hurricane Center where the experts are (www.hurricanes.gov). Here's the latest Melissa forecast:
@accuweather.com what are y'all doing? Absolutely dangerous to be issuing your own cone forecasts on Melissa. It reminds me of something in particular...
October 23, 2025 at 7:23 PM
@accuweather.com what are y'all doing? Absolutely dangerous to be issuing your own cone forecasts on Melissa. It reminds me of something in particular...
Over 50 dbz in a lake effect squall...
October 22, 2025 at 2:38 PM
Over 50 dbz in a lake effect squall...
This band of lake effect rain from Lake Erie is intense! Some lightning/thunder mixed into a few of those squalls!
October 22, 2025 at 2:06 PM
This band of lake effect rain from Lake Erie is intense! Some lightning/thunder mixed into a few of those squalls!