Brandon Holden

Great Lakes Birding Forecast for October:

OctoberRares.jpeg

(probably thrown all over, well past me in the southern Great Lakes, but still super exciting)

Over a cool billion on birdcast too. 👀

Awesome to see this huge fall bird migrations on radar - def. one of the biggest liftoffs of the year here #birding #wxbirding

CRPL alert 🚨

Photo from the perspective of the NOAA Hurricane Hunter aircraft in the eye of Hurricane Erin. A blue ocean can be seen along with the clouds marking the edge of the hurricane's eyewall.

📸August 16: Images from the NOAA Hurricane Hunter and our NOAA Satellites Ocean Winds team show an intense eyewall in Hurricane #Erin This photo shows the ocean surface calm in the eye and roaring in the eyewall. For the latest forecast visit hurricanes.gov

Image of the 500 hPa heights forecast for 0 UTC 24 June 2025, in 3D perspective

Visualizing the heat dome forecast.
Data from @ecmwf.int, plotted with @blender.org.
#science #scicomm #sciart

Kaboom #birding

omgz^2

Omgz #birding

Forester's Terns!

Check out our new @copernicusecmwf.bsky.social explorer!

ERA5 data to explore at your fingertips

#dataviz 🌏🛰️⚒️🧪🌡️

Ok - thank you!!

I'll keep my eyes peeled for the update for 2023-2024 ✌️

Hey @simonleewx.com - is it possible to find the past regimes online anywhere? I'm interested in using them as a way to discuss the effects of weather on bird migration... So (for example) having the daily regime from Jul-Dec 2024 is something I'm currently interested in... Thanks in advance!!

Frame this one #birding

#birding

Check out our new Polar Vortex Blog! Though parts of the US have been very cold and snowy, experts do not think there's much evidence that the polar vortex is the main driver of our winter weather so far this year. www.climate.gov/news-feature...

Final set of additions to PolarWx for the time being - two AI emulator models (ECMWF's AIFS, and the GFS-based GraphCast) are now plotting in real time:

polarwx.com/models/?mode...
polarwx.com/models/?mode...

This is the kind of weather shenanigans (with reforming lows etc.) that make for really exciting weather-focused birding in the GL's! I'm so excited to see what's out there over the next few days..... #soexcited #birding #wxbirding

North American jet stream pattern is just a smidged amplified this week.

Super interested to see what sort of vagrants turn up in the Great Lakes over the next 2-3 weeks....... Weather support is in overdrive #birding

Interesting to see what this hog of a low pressure system does for AK birding (and downstream effects on NA birding through Nov) --- 850mb winds shown

Climatology + MJO + Intense pre-season forecasts = 👀 👀 👀 for Mid-August onwards for a few weeks... Not to mention the increasing interest and knowledge in knowing when and where birders end up in the field...
#birding
#hurricanebirding

To-be "Post-tropical" Beryl is going to do it's very best to displace some birds into the southern Great Lakes in the coming days... Jet stream boost activated! #birding #hurricanebirding

I just... can't explain how exciting these maps are to a bird watcher from SW Ontario... #birding

A long-ish op-ed style piece from me in Nature, in which I consider the question "how doomed are we?" tl;dr: it's an existential, philosophical, and personal question. It sometimes gets posed as if it were a scientific one, but it mostly isn't. www.nature.com/articles/d41...

Ok thank you :) I'll keep searching!

Hi Signe - can I ask you a question? Are you aware of any work estimating the sea ice extent at the end of the last ice age? Thank you in advance