Greg Porter
@gporterwx.bsky.social
Senior newsroom meteorologist. Lover of snowstorms and hurricanes. And kitties 🐈⬛
Scotland!!!!! On the World Cup!
November 18, 2025 at 9:51 PM
Scotland!!!!! On the World Cup!
Lets go Scotland! One win please!!!🏴
November 18, 2025 at 7:47 PM
Lets go Scotland! One win please!!!🏴
Secondary low! Or a mesoscale low located over the North Bay is pulling in some heavy rain showers for SF right now.
November 17, 2025 at 6:52 PM
Secondary low! Or a mesoscale low located over the North Bay is pulling in some heavy rain showers for SF right now.
I've been trying to write this story for months. I've had a sneaking suspicion that the public perception of what El Nino and La Nina means for weather outcomes is not aligned with the truth.
www.sfchronicle.com/weather/arti...
www.sfchronicle.com/weather/arti...
California’s rule book on El Niño and La Niña is broken
La Niña is back, but week-to-week jet-stream chaos really decide whether California floods or stays dry.
www.sfchronicle.com
November 16, 2025 at 8:26 PM
I've been trying to write this story for months. I've had a sneaking suspicion that the public perception of what El Nino and La Nina means for weather outcomes is not aligned with the truth.
www.sfchronicle.com/weather/arti...
www.sfchronicle.com/weather/arti...
Some pop up storms on the Peninsula today!
Was just hit by a terrain-induced convective shower in San Francisco’s Twin Peaks neighborhood, the first I’ve experienced in my time living here. The marine layer typically limits surface convection along the San Francisco Peninsula, but it’s nonexistent today, making these showers possible. #CAwx
November 14, 2025 at 9:25 PM
Some pop up storms on the Peninsula today!
Can you spot the atmospheric river? The intensity of the low pressure system off the PNW has oriented the AR in a north/south direction over California. Keeps the party going for awhile in SF and Sacramento!
November 13, 2025 at 9:54 PM
Can you spot the atmospheric river? The intensity of the low pressure system off the PNW has oriented the AR in a north/south direction over California. Keeps the party going for awhile in SF and Sacramento!
Still raining in the Bay Area. Complex storm system meets atmospheric river
November 13, 2025 at 9:44 PM
Still raining in the Bay Area. Complex storm system meets atmospheric river
Reposted by Greg Porter
Read more >> https://bit.ly/3JINd53
November 13, 2025 at 7:29 PM
Read more >> https://bit.ly/3JINd53
High wind warning for San Francisco from 10pm tonight through 10am Thursday
November 12, 2025 at 3:50 PM
High wind warning for San Francisco from 10pm tonight through 10am Thursday
Dreary out this morning in the Bay Area. Soon it will be wet and windy. The storm details and timeline
www.sfchronicle.com/weather-fore...
www.sfchronicle.com/weather-fore...
Atmospheric river to hit California with heavy rain, strong winds. Here’s a timeline of the storm
A fast-moving storm driven by an atmospheric river will sweep down the California coast, bringing a quick burst of heavy rain, strong winds and snow in the Sierra Nevada.
www.sfchronicle.com
November 12, 2025 at 3:38 PM
Dreary out this morning in the Bay Area. Soon it will be wet and windy. The storm details and timeline
www.sfchronicle.com/weather-fore...
www.sfchronicle.com/weather-fore...
The Bay Area will have a few hours of clear(ish) skies! This is the modeled cloud cover at 9pm. White is overcast, blut is clear. Clouds will fill in everywhere overnight, so give it a shot now!
www.sfchronicle.com/california/a...
www.sfchronicle.com/california/a...
November 12, 2025 at 3:15 AM
The Bay Area will have a few hours of clear(ish) skies! This is the modeled cloud cover at 9pm. White is overcast, blut is clear. Clouds will fill in everywhere overnight, so give it a shot now!
www.sfchronicle.com/california/a...
www.sfchronicle.com/california/a...
Some temps around the Bay today
SF- 77 (highest Nov temp since 2020)
Oak - 82 (first back to back 82 degree days in Nov since 1991)
Livermore - 82 (daily record tied)
San Jose - 80 (first back to back 80 degree days in Nov since 2012)
SF- 77 (highest Nov temp since 2020)
Oak - 82 (first back to back 82 degree days in Nov since 1991)
Livermore - 82 (daily record tied)
San Jose - 80 (first back to back 80 degree days in Nov since 2012)
November 11, 2025 at 1:14 AM
Some temps around the Bay today
SF- 77 (highest Nov temp since 2020)
Oak - 82 (first back to back 82 degree days in Nov since 1991)
Livermore - 82 (daily record tied)
San Jose - 80 (first back to back 80 degree days in Nov since 2012)
SF- 77 (highest Nov temp since 2020)
Oak - 82 (first back to back 82 degree days in Nov since 1991)
Livermore - 82 (daily record tied)
San Jose - 80 (first back to back 80 degree days in Nov since 2012)
Time to open the resorts in Tahoe? This weeks storm is trending colder. Looks like a good 10 to 15 inches for most resorts and 3 to 6 inches at lake level by Friday.
November 10, 2025 at 5:41 PM
Time to open the resorts in Tahoe? This weeks storm is trending colder. Looks like a good 10 to 15 inches for most resorts and 3 to 6 inches at lake level by Friday.
Excellent story from Andrea, but my mind naturally wanders to an unanswered question. @bmcnoldy.bsky.social's OHC charts show October 2023 to 2025 with historically high levels. Why?
Thanks to @bmcnoldy.bsky.social & @drkimwood.bsky.social for help with this story. We were all struggling to find sufficient words.
“It’s this frustrating combination of, scientifically speaking, we know this is possible, but as humans we are flabbergasted at seeing manifest in this way.” -Kim 🧪
“It’s this frustrating combination of, scientifically speaking, we know this is possible, but as humans we are flabbergasted at seeing manifest in this way.” -Kim 🧪
The Science of How Hurricane Melissa Became So Extreme
A nearly perfect alignment of factors has enabled Hurricane Melissa to become one of the most intense Atlantic storms ever recorded
www.scientificamerican.com
October 30, 2025 at 11:14 PM
Excellent story from Andrea, but my mind naturally wanders to an unanswered question. @bmcnoldy.bsky.social's OHC charts show October 2023 to 2025 with historically high levels. Why?
I've missed writing about hurricanes, but this was not a fun strom to write about. Devastation awaits Jamaica and Cuba.
www.sfchronicle.com/weather/arti...
www.sfchronicle.com/weather/arti...
Hurricane Melissa nears landfall, putting Jamaica at risk of a generational disaster
The Category 5 storm is expected to cause “total structural failure” in parts of the island and unleash up to 40 inches of rain.
www.sfchronicle.com
October 27, 2025 at 10:16 PM
I've missed writing about hurricanes, but this was not a fun strom to write about. Devastation awaits Jamaica and Cuba.
www.sfchronicle.com/weather/arti...
www.sfchronicle.com/weather/arti...
Also, Hurricane Melissa is quite a thing to look at. Beautiful and terrifying. One recent measurement recorded sustained winds of 180 mph around the eye. This will be a historic storm for Jamaica and not in a good way.
October 27, 2025 at 4:33 PM
Also, Hurricane Melissa is quite a thing to look at. Beautiful and terrifying. One recent measurement recorded sustained winds of 180 mph around the eye. This will be a historic storm for Jamaica and not in a good way.
Forecast:
"San Francisco: Monday should start off with sunshine and clear skies across the city, a nice reprieve from the overcast skies this weekend."
Reality:
You win again San Francisco
"San Francisco: Monday should start off with sunshine and clear skies across the city, a nice reprieve from the overcast skies this weekend."
Reality:
You win again San Francisco
October 27, 2025 at 4:20 PM
Forecast:
"San Francisco: Monday should start off with sunshine and clear skies across the city, a nice reprieve from the overcast skies this weekend."
Reality:
You win again San Francisco
"San Francisco: Monday should start off with sunshine and clear skies across the city, a nice reprieve from the overcast skies this weekend."
Reality:
You win again San Francisco
“We do our jobs very well, despite the fact I’m not getting a paycheck right now.”
The NWS and other NOAA departments are reaching a breaking point.
@edwardsanthonyb.bsky.social with the story.
www.sfchronicle.com/weather/arti...
The NWS and other NOAA departments are reaching a breaking point.
@edwardsanthonyb.bsky.social with the story.
www.sfchronicle.com/weather/arti...
California weather offices brace for storms as short-staffing fears grow
The National Weather Service, grappling with staffing shortages, is cutting back on some forecasts in California. State officials fear flood forecasts could be impacted.
www.sfchronicle.com
October 27, 2025 at 3:41 PM
“We do our jobs very well, despite the fact I’m not getting a paycheck right now.”
The NWS and other NOAA departments are reaching a breaking point.
@edwardsanthonyb.bsky.social with the story.
www.sfchronicle.com/weather/arti...
The NWS and other NOAA departments are reaching a breaking point.
@edwardsanthonyb.bsky.social with the story.
www.sfchronicle.com/weather/arti...
I feel personally insulted when I misspell a word so badly that the correct word doesn't even show up in the suggestions.
October 21, 2025 at 7:05 PM
I feel personally insulted when I misspell a word so badly that the correct word doesn't even show up in the suggestions.
What’s the winter look like for California after a wet start?
California’s rainy season is off to a fast start. This has many people asking the natural question: Is this a sign of a wet winter to come?
California’s wet season starts strong. Here’s what that means for the winter ahead
California’s rainy season is off to a fast start. This has many people asking the natural question: Is this a sign of a wet winter to come?
bit.ly
October 18, 2025 at 2:45 PM
What’s the winter look like for California after a wet start?
😬
LOX issues Tornado Warning [tornado: RADAR INDICATED, hail: <.75 IN] for San Luis Obispo [CA] till 12:15 AM PDT Link
October 14, 2025 at 6:22 AM
😬
Wow, some impressive rainfall totals around the Bay Area. Much of this fell in just a few hours. 1.69 inches in San Jose would make it a top 10 wettest day in the last two decades. And how about that 2.19 inch reading in Oakland!
October 14, 2025 at 5:36 AM
Wow, some impressive rainfall totals around the Bay Area. Much of this fell in just a few hours. 1.69 inches in San Jose would make it a top 10 wettest day in the last two decades. And how about that 2.19 inch reading in Oakland!
Oh hi there! Parent low pressure system is finally making its way to the Bay Area tonight. This system has already dumped a ton of rain across NoCal and figures to wreck more havoc on CA tomrorrow.
October 14, 2025 at 3:56 AM
Oh hi there! Parent low pressure system is finally making its way to the Bay Area tonight. This system has already dumped a ton of rain across NoCal and figures to wreck more havoc on CA tomrorrow.
Reposted by Greg Porter
Rain is approaching San Francisco and will begin within the next 30 min. Downpours across the Bay Area could cause nuisance flooding, especially during the evening commute. Thunder and lightning is possible as the atmosphere becomes increasingly unstable this afternoon. #CAwx
October 13, 2025 at 7:02 PM
Rain is approaching San Francisco and will begin within the next 30 min. Downpours across the Bay Area could cause nuisance flooding, especially during the evening commute. Thunder and lightning is possible as the atmosphere becomes increasingly unstable this afternoon. #CAwx