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Hurricane #Polo has FINALLY made landfall in Baja California after almost 8 days over the ocean, and hitting category 5 status three different times.

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Cory's app is quietly the best weather app I've come across in years. $3.99/month. Built by a NWS meteorologist. Highly recommend

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I think papers touting prediction markets over models are misleading. Kalshi’s bots adjust odds using 1-min obs. The National Blend of Models updates way less often. I wish they tested SFO. I’ve seen bots fail there. Markets don’t solve everything. arxiv.org/pdf/2609.23969

arxiv.org

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Greg Porter @gporterwx.bsky.social · 28/09/2026

Southern New England got soaked!

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Holy moly. Hawaii narrowly avoids yet another major hurricane. #Nolo

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Greg Porter @gporterwx.bsky.social · 27/09/2026

I loved writing this story! California vineyards are experiencing one of their strangest weather years ever. And it's lead to record early harvests, lower crop yields, but a spike in quality. Now, El Niño is coming.

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Greg Porter @gporterwx.bsky.social · 27/09/2026

"Clouds are expected to build across the Bay Area and could obscure the view on Saturday in San Francisco and around the bay, according to Chronicle meteorologist Greg Porter." BREAKING: I was mostly wrong about this! The Harvest Moon is gorgeous and very visible!

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Greg Porter @gporterwx.bsky.social · 26/09/2026

I am coining this phrase. I’ve been throwing it around for a few months now. We are in the era where everyone is a “pocket” meteorologist. It’s made my job much harder.

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Greg Porter @gporterwx.bsky.social · 26/09/2026

This #ElNiño is basically creating one big monsoon season across the Pacific. Not an easterly to be found anywhere.

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Greg Porter @gporterwx.bsky.social · 26/09/2026

Wow. A recon mission into #Polo just measured a wind speed of 215 mph a few thousand feet above the surface.

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Greg Porter @gporterwx.bsky.social · 25/09/2026

Another three peat in the Pacific

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Greg Porter @gporterwx.bsky.social · 25/09/2026

Running out of words for what's going on in the Pacific. Three hurricanes once again. Two major (Polo, Cat 5, 180mph) (Odalys, Cat 4, 130 mph). Nolo reached hurricane status and will become a major hurricane soon. Hawaii will be lashed with torrential rain, coastal flooding and high winds.

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‘Frustrated and upset’: Angel Island burn that sent smoke across Bay Area triggers call for review

www.sfchronicle.com/climate/arti... Glad this is happening and I am grateful to have been able to provide a first hand impacts report and some meteorological context. In short, the burn should not have been called off in the morning based on weather conditions

sfchronicle.com

A Bay Area Air District board member is calling for a review of prescribed-burn policies after a second Angel Island operation this month sent smoke into Bay Area communities.

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Here is a term that I've never heard of before. Parasitic convection. Apparently, that's what is causing these weird bursts of deep convection on the edge of Hurricane #Polo I guess hurricanes can grow parasites

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#Polo keeps getting weirder. The odd blob now has colder cloud tops (more intense) thunderstorm clusters than the eyewall.🧐

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Greg Porter @gporterwx.bsky.social · 23/09/2026

#Polo looks odd this morning. Not sure what this blob is on the northern side of the storm

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The equinox has come! Summer if officially over. Happy Fall 🍁

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Wow! Recon flights inside of #Polo just recorded a central pressure of 889 mb. That's in the top 5 for the strongest storms on record in the EPAC

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#Polo's incredible rise from a tropical storm to a massive category 5 monster appears to have set a record.

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Holy crap. #Polo looks like an incredibly strong storm right now

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