Greg Porter

California, Edinburgh

Senior Newsroom Meteorologist at San Francisco Chronicle

Senior Newsroom Meteorologist for the @sfchronicle. Previously @washingtonpost. Lover of snowstorms, hurricanes and kitties 🐈‍⬛

Articles

Change in ocean temperatures is impacting Bay Area weather

2 days ago | sfchronicle.com | Greg Porter

Warmer temperatures will start to appear across the Bay Area on Wednesday after another cloudy start to the day. Baron/Lynx The Bay Area will stay cool Wednesday while much of the eastern United States swelters under an early-season heat wave that’s pushing temperatures 15 to 20 degrees above normal across the Mid-Atlantic and Northeast.
Here’s why Bay Area weather is at its foggiest in June

6 days ago | sfchronicle.com | Greg Porter

The Golden Gate Bridge just barely peeks out from behind a thick layer of fog. Courtesy of Stacey McIntoshJune is one of the Bay Area’s foggiest months. It’s the season of sunrises that don’t really brighten, long sleeves that never quite come off, and afternoons that stubbornly remain gray west of the hills. But why? The answer isn’t rooted in unusual weather patterns.
Bay Area sees elevated fire risk as blustery weather returns

1 week ago | sfchronicle.com | Greg Porter

Winds will be noticeable on Thursday afternoon, with gusts between 20 and 35 mph common. Baron/Lynx Wednesday brought the Bay Area a brief reprieve from what’s been a chilly June. Inland locations cracked 80 degrees, and even parts of San Francisco made a run at their warmest day of the month. But that warmth won’t last.
Tropical Storm Erick eyes Mexico as Pacific’s first major hurricane of 2025

1 week ago | sfchronicle.com | Greg Porter

Tropical Storm Erick was looking disorganized on Tuesday, but forecasts call for the storm to rapidly strengthen to near major hurricane status over the next 36 hours. Baron/Lynx Tropical Storm Erick is quickly building south of Mexico and could make landfall to become the season’s first major hurricane late Wednesday, forecasters warned Tuesday.
Bay Area’s cool June continues, but these cities will heat up

2 weeks ago | sfchronicle.com | Greg Porter

Winds will be gusty on Friday, especially along the coast. Baron/Lynx A classic Bay Area weather split is shaping up for the weekend, and it’s one of those setups that could warrant an outfit change from fleece to shorts depending on the ZIP code. A shallow but stubborn marine layer will keep San Francisco, the Peninsula and parts of the East Bay shrouded in low clouds through the late morning hours each day, with only modest clearing expected before fog returns by sundown.
Bay Area sunshine may be short-lived. Here's why

2 weeks ago | sfchronicle.com | Greg Porter

Temperatures in the Bay Area will be the warmest of the week on Thursday thanks to a weaker marine layer. Baron/LynxAfter several days of subdued sun and a stubborn marine layer, the Bay Area’s cooler than average June continues Thursday, though a modest inland warmup is on the way. Parts of the North Bay, including Petaluma, Santa Rosa and Napa, are off to one of their cooler starts to June in recent memory.
This spot in California is so windy, locals call it a ‘little hurricane’ zone

2 weeks ago | sfchronicle.com | Greg Porter |Jack Lee

A sailboat passes by an American flag waving in the wind on the waterfront of Port Costa in Contra Costa County during a June day in 2024. Adahlia Cole/Special to The ChronicleCalifornia is a state defined by wildly diverse topography; from the tall peaks of the Sierra Nevada, to the lush lowlands of the Central Valley and the rugged cliffs lining more than 800 miles of coastline.
Here’s why forecasters see California turning red on this map

3 weeks ago | sfchronicle.com | Greg Porter

Above-average heat is favored across all of California, strongest over the Central Valley, deserts, and Sierra foothills while easing a notch at the immediate coast. Baron/Lynx California’s first real taste of summer arrived recently, with temperatures pushing triple-digit highs from Redding to Palm Springs, heat more typical of July than spring.
Here’s when the Bay Area’s gloomy, colder weather is expected to return

3 weeks ago | sfchronicle.com | Greg Porter

The long range forecast now shows cooler than normal temperatures by the middle of the month. Baron/Lynx June opened on a familiar note. There have been frequent coastal eddies helping to keep the fog at bay, while inland high temperatures have only nudged a few degrees above average since late May’s brief heat spike. But that easy rhythm looks set to break.
California heat wave to bring triple-digit temps. Here’s the day-by-day forecast

4 weeks ago | sfchronicle.com | Greg Porter

Forecast highs soar across California on Friday, with triple digits expected in the Central Valley and interior Northern California. Baron/Lynx The first significant heat event of the season is ramping up across California, with temperatures expected to spike sharply across inland areas Friday and Saturday. While early forecasts predicted all-time May temperature records could fall, confidence in record-breaking heat has dropped a bit.