Marina Bro. Mountain Runner. Tweets about SF, weather, and mountain running.
San Francisco, CA
Joined September 2011
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MarinaBros retweeted
California just had its hottest and driest March ever recorded.
It was warmer than any April on record since 1895.
Warmer than the average May. And as dry as a typical July.
A month that would have been virtually impossible in the pre-industrial climate.
MarinaBros retweeted
Whew.
All signs are increasingly pointing to a significant, if not strong to very strong, El Niño event. I'll have more to say in coming weeks & months, but for now I'll just say that this is increasingly likely to become a major regional-to-global climate driver in 2026-2027.
ALT Time series plot depicting predicted Nino 3.4 region ocean temperature anomalies from the latest (Mar 2026) ECMWF ensemble. It depicts an extremely rapid rise in such temperatures, from modest negative anomalies to strong positive anomalies, by mid-summer 2026--indicative of a transition from weak-moderate La Nina conditions to moderate-strong El Nino conditions over just a few months.
MarinaBros retweeted
Hello spring! Meteorological winter is over.
The season featured record warmth in the West and was the coldest in a decade or more in the East.
According to preliminary data, it was the second warmest winter on record for the contiguous United States as a whole.
MarinaBros retweeted
Winter 2025/2026 will go down as the warmest winter in recorded history for the Western United States.
MarinaBros retweeted
Today was one of the hottest winter days in California history:
Indio – 100°F
Los Angeles – 91°F
Monterey – 82°F
Escondido – 96°F
San Francisco – 75°F
Long Beach – 92°F
San Luis Obispo – 86°F
Half Moon Bay – 79°F
San Diego – 85°F
MarinaBros retweeted
ALERTSF: A young mountain lion was spotted near Pacific/Octavia. If you see the mountain lion, slowly back away, do not run. Call Animal Care & Control at 415-554-9400 or 911 in a life safety emergency.
If you have a child with you - pick them up - and keep dogs on leash. If the mountain lion approaches - make yourself 'big' wave your arms, shout, throw something, and again, do not run.
manager.everbridge.net/pub/2…
MarinaBros retweeted
Marco Rubio realizing that Jim Cantore isn't covering the coming Winter Storm...
MarinaBros retweeted
Senator Ted Cruz (R-Texas) was spotted earlier today, January 20, 2026, on a plane heading to Laguna Beach as the state of Texas braces for a rare ice threat and arctic cold front.
MarinaBros retweeted
⚠️PARTICULARLY DANGEROUS SITUATION FRIDAY⚠️
We rarely issue these, but Friday will be a Particularly Dangerous Situation regarding potential for rapid wildfire spread in and immediately adjacent to the Boulder/Jefferson County foothills. Be ready to take swift action. #COwx
ALT Graphic shows expected wind speeds along the Front Range for Friday, with gusts to 80-105 mph in the foothills of Boulder County. Peak gusts close to 40 mph will likely spread east to I-25, with gusts 30 mph or less farther east.
MarinaBros retweeted
OK, now that things have calmed down for the time being. Let's take a look 🧐back at the recent lightning ⚡event. What was the final strike count? 🤔The region experienced over 13k total flashes, 6500 in-cloud, and 6700 cloud-ground. Most were wet with no 🔥 concerns. #CAwx
MarinaBros retweeted
I reverse engineered the San Francisco parking ticket system. I can see every ticket seconds after it's written
So I made a website. Find My Friends? AVOID THE PARKING COPS.
MarinaBros retweeted
I’m excited to share our new @Nature paper 📝, which provides strong evidence that the walkability of our built environment matters a great deal to our physical activity and health.
Details in thread.🧵
nature.com/articles/s41586-0…
MarinaBros retweeted
I compared the first 2 quarters of 2025 with the first and last 2 quarters of 2024.
Y'all, I don't think Trump's economy is doing well.
MarinaBros retweeted
What are the odds this July’s Mediterranean heat is natural?
About 1 in a billion!
It's the most extreme Mediterannean heatwave on record. Peak anomalies +8C (+14F) now off France/ Italy with absolute peak temps near 31C/88F.
Those are isolated, but how deviant are the overall Med SST's from the norm? Around 6 deviations (sigma) or a roughly a 1-in-a-billion chance. So, basically, it's NOT possible in a natural climate.
BUT heat waves like this are not caused solely by climate change. So let's dig deeper with a thread... 1/
