San Francisco Bay Area Skywarn
@sfoskywarn.bsky.social
San Francisco Bay Area Skywarn is a group of trained weather spotter volunteers. Our website is sfoskywarn.org.
Reposted by San Francisco Bay Area Skywarn
(2/2) Gutters should be cleaned out and loose outdoor items secured by Thursday. Impactful weather in the form of rain, wind, and even a slight chance for thunderstorms returns Sunday. Rainy and windy conditions are expected to continue into nex... https://x.com/NWSBayArea/status/2001262720935682240
December 17, 2025 at 12:09 PM
(2/2) Gutters should be cleaned out and loose outdoor items secured by Thursday. Impactful weather in the form of rain, wind, and even a slight chance for thunderstorms returns Sunday. Rainy and windy conditions are expected to continue into nex... https://x.com/NWSBayArea/status/2001262720935682240
Reposted by San Francisco Bay Area Skywarn
(1/2) Good early Wednesday morning! Light rain showers will move into the area from the north this morning, becoming isolated to scattered this afternoon. More light rain showers are expected tomorrow ahead of widespread beneficial rainfall Frid... https://x.com/NWSBayArea/status/2001262718540742843
December 17, 2025 at 12:09 PM
(1/2) Good early Wednesday morning! Light rain showers will move into the area from the north this morning, becoming isolated to scattered this afternoon. More light rain showers are expected tomorrow ahead of widespread beneficial rainfall Frid... https://x.com/NWSBayArea/status/2001262718540742843
Reposted by San Francisco Bay Area Skywarn
🚨Attention drivers and mariners! 🚨 Dense fog is being reported across the region. Follow the safety precautions in the images if you are unable to delay travel. #CAwx https://x.com/NWSBayArea/status/1999822300560883724
December 13, 2025 at 12:59 PM
🚨Attention drivers and mariners! 🚨 Dense fog is being reported across the region. Follow the safety precautions in the images if you are unable to delay travel. #CAwx https://x.com/NWSBayArea/status/1999822300560883724
Reposted by San Francisco Bay Area Skywarn
A Dense Fog Advisory is in effect for the North Bay Interior Valleys, East Bay Interior Valleys through 11AM Saturday. Expect visibility less than 1/4 mile at times. https://x.com/NWSBayArea/status/1999698654014115992
December 13, 2025 at 4:39 AM
A Dense Fog Advisory is in effect for the North Bay Interior Valleys, East Bay Interior Valleys through 11AM Saturday. Expect visibility less than 1/4 mile at times. https://x.com/NWSBayArea/status/1999698654014115992
Reposted by San Francisco Bay Area Skywarn
🌧️A pattern change is expected through the weekend with chances for light rain across the middle of next week, followed by possible heavy rain for the following weekend! Our colleagues at the @NWSCPC have more info. Keep track of forecast u... https://x.com/NWSBayArea/status/1999606112065085684
December 12, 2025 at 10:35 PM
🌧️A pattern change is expected through the weekend with chances for light rain across the middle of next week, followed by possible heavy rain for the following weekend! Our colleagues at the @NWSCPC have more info. Keep track of forecast u... https://x.com/NWSBayArea/status/1999606112065085684
Although Skywarn Recognition Day (SRD) has been officially cancelled for 2025, this Saturday, December 6 from 0000-2359 UTC (4pm PST Friday Dec 5 through 3:59pm PST Saturday Dec 6), WX6MTR will be on the air participating in SRD in an unofficial capacity. sfoskywarn.org/2025/12/05/s...
Skywarn Recognition Day — WX6MTR will be on the air – San Francisco Bay Area SKYWARN®
sfoskywarn.org
December 5, 2025 at 6:53 PM
Although Skywarn Recognition Day (SRD) has been officially cancelled for 2025, this Saturday, December 6 from 0000-2359 UTC (4pm PST Friday Dec 5 through 3:59pm PST Saturday Dec 6), WX6MTR will be on the air participating in SRD in an unofficial capacity. sfoskywarn.org/2025/12/05/s...
Reposted by San Francisco Bay Area Skywarn
🌫️Dense Fog Advisory for the East Bay interior valleys through 11 AM due to visibilities of 1/4 miles or less in patchy dense fog making driving hazardous. If driving, slow down, use your low beam headlights, and leave plenty of distance ah... https://x.com/NWSBayArea/status/1996961743659036677
December 5, 2025 at 3:25 PM
🌫️Dense Fog Advisory for the East Bay interior valleys through 11 AM due to visibilities of 1/4 miles or less in patchy dense fog making driving hazardous. If driving, slow down, use your low beam headlights, and leave plenty of distance ah... https://x.com/NWSBayArea/status/1996961743659036677
Reposted by San Francisco Bay Area Skywarn
Patchy dense fog is being reported in the inland valleys, including Santa Rosa and Hollister. Drivers: if you encounter dense fog, slow down, use low beam headlights, and keep extra space between you and the car in front! #CAwx https://x.com/NWSBayArea/status/1994380168698413487
November 28, 2025 at 12:30 PM
Patchy dense fog is being reported in the inland valleys, including Santa Rosa and Hollister. Drivers: if you encounter dense fog, slow down, use low beam headlights, and keep extra space between you and the car in front! #CAwx https://x.com/NWSBayArea/status/1994380168698413487
Reposted by San Francisco Bay Area Skywarn
Unfortunately we have had a couple of incidents where people have been swept out to sea by hazardous surf conditions, including sneaker waves and rip currents, and died as a result. If your weekend plans involve a trip to the beach, NEVER turn y... https://x.com/NWSBayArea/status/1994375948721160303
November 28, 2025 at 12:12 PM
Unfortunately we have had a couple of incidents where people have been swept out to sea by hazardous surf conditions, including sneaker waves and rip currents, and died as a result. If your weekend plans involve a trip to the beach, NEVER turn y... https://x.com/NWSBayArea/status/1994375948721160303
Reposted by San Francisco Bay Area Skywarn
⚠️🌊Heads up! A Beach Hazards Statement is in effect now through 10 PM Sunday along the Pacific coast. There will be an increased risk for sneaker waves and rip currents with breaking waves between 13 to 18 feet expected. Never turn your b... https://x.com/NWSBayArea/status/1994369639036408219
November 28, 2025 at 11:51 AM
⚠️🌊Heads up! A Beach Hazards Statement is in effect now through 10 PM Sunday along the Pacific coast. There will be an increased risk for sneaker waves and rip currents with breaking waves between 13 to 18 feet expected. Never turn your b... https://x.com/NWSBayArea/status/1994369639036408219
Reposted by San Francisco Bay Area Skywarn
This was fun to write! But also one of the more complex topics that I’ve covered!
The polar vortex is about to weaken sharply, as part of a rare event called “sudden stratospheric warming.” It’s a big deal for weather around the country.
Rare stratospheric warming event is about to occur. Here's the California impact
The polar vortex is about to weaken sharply, as part of a rare event called “sudden stratospheric warming.” It’s a big deal for weather around the country.
bit.ly
November 19, 2025 at 8:16 PM
This was fun to write! But also one of the more complex topics that I’ve covered!
Reposted by San Francisco Bay Area Skywarn
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...
Reposted by San Francisco Bay Area Skywarn
3:15PM 11/20/25 Radar Update: Showers slowly slide through and taper off this afternoon. Here's a nice shot of some rain showers from @ALERTCalifornia via the West Gonzalez camera. For those looking to dry out for a bit, fret not that arrives to... https://x.com/NWSBayArea/status/1991647964360831441
November 20, 2025 at 11:39 PM
3:15PM 11/20/25 Radar Update: Showers slowly slide through and taper off this afternoon. Here's a nice shot of some rain showers from @ALERTCalifornia via the West Gonzalez camera. For those looking to dry out for a bit, fret not that arrives to... https://x.com/NWSBayArea/status/1991647964360831441
Reposted by San Francisco Bay Area Skywarn
⚠️Heads up! A Beach Hazards Statement will go into effect at 4 PM Thursday and continue through Monday night. There will be an increased risk for sneaker waves and rip currents with breaking waves between 13 to 18 feet expected. Never turn y... https://x.com/NWSBayArea/status/1991117789810090278
November 19, 2025 at 12:33 PM
⚠️Heads up! A Beach Hazards Statement will go into effect at 4 PM Thursday and continue through Monday night. There will be an increased risk for sneaker waves and rip currents with breaking waves between 13 to 18 feet expected. Never turn y... https://x.com/NWSBayArea/status/1991117789810090278
Reposted by San Francisco Bay Area Skywarn
🌧️More rain on the way. Here's the latest rainfall totals with next storm. While there still is some uncertainty with the exact track of the storm boom and bust rainfall scenarios don't vary that much. Heaviest rain will be Wed PM-> Thu AM ... https://x.com/NWSBayArea/status/1991118757100392497
November 19, 2025 at 12:33 PM
🌧️More rain on the way. Here's the latest rainfall totals with next storm. While there still is some uncertainty with the exact track of the storm boom and bust rainfall scenarios don't vary that much. Heaviest rain will be Wed PM-> Thu AM ... https://x.com/NWSBayArea/status/1991118757100392497
Reposted by San Francisco Bay Area Skywarn
We're getting a better look at the main rain band as it approaches the coast this morning. The latest Mesoscale Precipitation Discussion from the @NWSWPC states, "Flash flooding is expected on at least an isolated basis" https://www.wpc.ncep.noa... https://x.com/NWSBayArea/status/1988912993598386242
November 13, 2025 at 10:26 AM
We're getting a better look at the main rain band as it approaches the coast this morning. The latest Mesoscale Precipitation Discussion from the @NWSWPC states, "Flash flooding is expected on at least an isolated basis" https://www.wpc.ncep.noa... https://x.com/NWSBayArea/status/1988912993598386242
Reposted by San Francisco Bay Area Skywarn
The main band of rain has reached the North Bay as of 2:45 AM. Steady rain will continue here until 10 AM or so #CAwx https://x.com/NWSBayArea/status/1988923459695423706
November 13, 2025 at 11:05 AM
The main band of rain has reached the North Bay as of 2:45 AM. Steady rain will continue here until 10 AM or so #CAwx https://x.com/NWSBayArea/status/1988923459695423706
Reposted by San Francisco Bay Area Skywarn
Rain returns midweek! 🌧️ Probabilities are increasing for 2"+ of rain Wed–Fri, highest in the North Bay, Santa Cruz Mountains, & Big Sur coast (60–90%), lower across the South Bay & interior valleys (10–30%). #CAwx #BayAreaWX https://x.com/NWSBayArea/status/1987568636882518119
November 9, 2025 at 5:29 PM
Rain returns midweek! 🌧️ Probabilities are increasing for 2"+ of rain Wed–Fri, highest in the North Bay, Santa Cruz Mountains, & Big Sur coast (60–90%), lower across the South Bay & interior valleys (10–30%). #CAwx #BayAreaWX https://x.com/NWSBayArea/status/1987568636882518119
Reposted by San Francisco Bay Area Skywarn
☀️➡️🌧️Today is a warm and sunny day... the perfect time to begin preparing for a rainy midweek period! Latest forecast shows most intense rain expected late Wednesday into Thursday. Clean out gutters and storm drains to prevent road... https://x.com/NWSBayArea/status/1987463883494179152
November 9, 2025 at 10:29 AM
☀️➡️🌧️Today is a warm and sunny day... the perfect time to begin preparing for a rainy midweek period! Latest forecast shows most intense rain expected late Wednesday into Thursday. Clean out gutters and storm drains to prevent road... https://x.com/NWSBayArea/status/1987463883494179152
Reposted by San Francisco Bay Area Skywarn
Higher than normal tides are expected this week thanks to a Supermoon taking place on November 5th. The Supermoon brings the highest (and lowest) tides of all and can result in coastal flooding. A Coastal Flood Advisory remains in effect now thr... https://x.com/NWSBayArea/status/1985811175414677525
November 4, 2025 at 8:51 PM
Higher than normal tides are expected this week thanks to a Supermoon taking place on November 5th. The Supermoon brings the highest (and lowest) tides of all and can result in coastal flooding. A Coastal Flood Advisory remains in effect now thr... https://x.com/NWSBayArea/status/1985811175414677525
Reposted by San Francisco Bay Area Skywarn
It's going to be a wet commute this morning. Allow extra patience, space, and time when driving this morning and remember to turn on your headlights! #CAwx https://x.com/NWSBayArea/status/1985986936842919942
November 5, 2025 at 8:33 AM
It's going to be a wet commute this morning. Allow extra patience, space, and time when driving this morning and remember to turn on your headlights! #CAwx https://x.com/NWSBayArea/status/1985986936842919942
Reposted by San Francisco Bay Area Skywarn
The NOAA Weather Radio Weekly Test has been cancelled today due to impactful weather. Visit http://weather.gov/nwr for more information. Next week's test will occur on Wednesday, November 12th, 2025 between 11 AM and 12 PM. #CAwx https://x.com/NWSBayArea/status/1986011309469548872
November 5, 2025 at 10:13 AM
The NOAA Weather Radio Weekly Test has been cancelled today due to impactful weather. Visit http://weather.gov/nwr for more information. Next week's test will occur on Wednesday, November 12th, 2025 between 11 AM and 12 PM. #CAwx https://x.com/NWSBayArea/status/1986011309469548872
Reposted by San Francisco Bay Area Skywarn
⚠️🍃Wind Advisory issued for most of the Bay Area and Santa Cruz Mountains Tuesday night through Wednesday due to gusts 35-45 mph. Unsecured objects will blow away, downed tree limbs will cause isolated power outages, and high profile vehi... https://x.com/NWSBayArea/status/1985522269741879799
November 4, 2025 at 1:46 AM
⚠️🍃Wind Advisory issued for most of the Bay Area and Santa Cruz Mountains Tuesday night through Wednesday due to gusts 35-45 mph. Unsecured objects will blow away, downed tree limbs will cause isolated power outages, and high profile vehi... https://x.com/NWSBayArea/status/1985522269741879799
Reposted by San Francisco Bay Area Skywarn
🌧️❓Heavy rain may be on the way! 🌧️ The highest chance for over 1 inch of rain in 72 hours is in the North Bay and Santa Cruz Mountains (up to 55%). Rain starts late Monday night with the greatest impacts expected Wednesday across th... https://x.com/NWSBayArea/status/1984305851838935499
October 31, 2025 at 5:14 PM
🌧️❓Heavy rain may be on the way! 🌧️ The highest chance for over 1 inch of rain in 72 hours is in the North Bay and Santa Cruz Mountains (up to 55%). Rain starts late Monday night with the greatest impacts expected Wednesday across th... https://x.com/NWSBayArea/status/1984305851838935499
Reposted by San Francisco Bay Area Skywarn
Light to moderate 🌧️continues to move across the North Bay! The heaviest rain (up to 0.50" in the past 12 hours) is over the Coastal Ranges in Sonoma County. Lesser amounts in the valleys. Front moves south this afternoon, but little/no rai... https://x.com/NWSBayArea/status/1982110926510637321
October 25, 2025 at 3:50 PM
Light to moderate 🌧️continues to move across the North Bay! The heaviest rain (up to 0.50" in the past 12 hours) is over the Coastal Ranges in Sonoma County. Lesser amounts in the valleys. Front moves south this afternoon, but little/no rai... https://x.com/NWSBayArea/status/1982110926510637321