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Posts by Union City, CA Weather

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A Coastal Flood Advisory is in effect through 2 PM Sunday for the Pacific Coast and Bay Shorelines. Up to 2.2 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. #CAwx #BayAreaWX https://x.com/NWSBayArea/status/2006418679190184287

3 months ago 6 3 0 0
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There is a 70-90% chance of rain throughout the region tonight. Be cautious when driving in wet conditions and make sure to grab your rain coat if heading out for New Year's Eve festivities! #CAwx https://x.com/NWSBayArea/status/2006512055898329288

3 months ago 6 2 0 0
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Alberta clipper reinforces lake-effect snow as heavy rain targets southern California into the New Year A surge of Arctic air, reinforced lake-effect snowfall, and an atmospheric river are forecast to affect large portions of the United States from December 31, 2025, into January 2, 2026.

Alberta clipper reinforces lake-effect snow as heavy rain targets southern California into the New Year
watchers.news/2025/12/31/a...

3 months ago 0 0 0 0
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Long-duration M7.1 solar flare erupts from AR 4324 A long-duration solar flare measuring M7.1 at its peak erupted from Active Region 4324 at 13:51 UTC on December 31, 2025. The event started at 13:12 and ended at 14:11 UTC.

Long-duration M7.1 solar flare erupts from AR 4324

A long-duration solar flare measuring M7.1 at its peak erupted from Active Region 4324 at 13:51 UTC on December 31, 2025. The event started at 13:12 and ended at 14:11 UTC.
watchers.news/2025/12/31/l...

3 months ago 0 0 0 0
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Back to back atmospheric rivers forecast to bring heavy rain and mountain snow to California Heavy rain and snow are forecast across California and Sierra Nevada through January 4, 2026. The first wave will target southern California with subtropical moisture, followed by a stronger system…

Back to back atmospheric rivers forecast to bring heavy rain and mountain snow to California
watchers.news/2025/12/31/b...

3 months ago 0 0 0 0
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Evacuation warnings issued for Los Angeles County burn scar areas ahead of New Year storm Evacuation warnings were issued for Los Angeles County, California for multiple burn scars across the region as an atmospheric river brings in the threat of flash floods and debris flows through New…

Evacuation warnings issued for Los Angeles County burn scar areas ahead of New Year storm
watchers.news/2025/12/31/e...

3 months ago 1 0 0 0
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Southerly winds are forecast to increase across the region on Friday. There are medium (40-70%) to high (70-100%) probabilities of wind gusts above 40 mph. These probabilities are greatest along the coast and areas of higher terrain. #weather #SFBA #CAwx

3 months ago 0 0 0 0
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A Coastal Flood Advisory has been issued and will go into effect 5 AM Wednesday and end at 2 PM Sunday for the Pacific Coast and Bay Shorelines. Up to 1.8 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. #weather #SFBA #CAwx

3 months ago 0 0 0 0
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Subtropical moisture and re-intensified atmospheric river to impact California through New Year’s weekend A surge of subtropical moisture is forecast to bring moderate to heavy rain to southern and central California on Wednesday, December 31, 2025, with rain spreading north on Thursday, January 1, 2026.

Subtropical moisture and re-intensified atmospheric river to impact California through New Year’s weekend #weather #AR #SFBA #CAwx
watchers.news/2025/12/30/s...

3 months ago 0 1 0 0
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Low visibility could make driving conditions hazardous across the North Bay and East Bay. If driving, slow down, use your low beam headlights, and leave plenty of distance ahead of you. If commuting, allow extra drive time to reach your destination safely. #weather #SFBA #CAwx
www.weather.gov/mtr/

3 months ago 0 0 0 0
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Tornadoes rip through Tazewell, Christian, and Macon counties, leaving thousands without power, Illinois Multiple tornadoes, including an EF-1 with peak winds of 158 km/h (98 mph), touched down in Illinois on Sunday, December 28, 2025, with significant damage and power outages being reported across…

Tornadoes rip through Tazewell, Christian, and Macon counties, leaving thousands without power, Illinois #weather #tornadoes #ILwx
watchers.news/2025/12/29/t...

3 months ago 0 0 0 0
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Earth-directed CME from M4.2 flare forecast to produce G1 geomagnetic storm on New Year’s Day A coronal mass ejection (CME) associated with an M4.2 solar flare from Region 4317 is expected to produce a G1 – Minor geomagnetic storm as it grazes Earth late on December 31 into early January 1…

Earth-directed CME from M4.2 flare forecast to produce G1 geomagnetic storm on New Year’s Day #spaceweather #CME
watchers.news/2025/12/29/e...

3 months ago 0 0 0 0

#weather #SFBA #CAwx

3 months ago 0 0 0 0
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KMTR Coastal Flood Advisory #17 San Francisco, Coastal North Bay Including Point Reyes National Seashore, North Bay Interior Valleys, San Francisco Bay Shoreline, San Francisco Peninsula Coast, Northern Monterey Bay, Southern Monter...

MTR issues Coastal Flood Advisory valid at Dec 31, 5:00 AM PST for Coastal North Bay Including Point Reyes National Seashore, North Bay Interior Valleys, Northern Monterey Bay, San Francisco, San Francisco Bay Shoreline... [CA] till Jan 4, 2:00 PM PST
mesonet.agron.iastate.edu/vtec/?year=2...

3 months ago 0 0 1 0
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Over 30 weather-related crashes, one fatality reported as extreme cold and snow hit Iowa The Iowa State Patrol responded to 31 crashes during extreme winter weather on December 28, 2025, as snow, high winds, and whiteout conditions spread across the state. One person was killed…

Over 30 weather-related crashes, one fatality reported as extreme cold and snow hit Iowa #weather #IAwx
watchers.news/2025/12/29/o...

3 months ago 0 0 0 0

King tides are coming this week. Here's why in order of importance: • There's a Full Moon on 1/3 • The Moon is closest to the Earth on 1/1 • The Earth is closest to the Sun on 1/3 https://x.com/NWSBayArea/status/2005391434762146037

3 months ago 10 5 0 1
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A Cold Weather Advisory is in effect tonight for much of the Interior Bay Area and Central Coast. This goes for everyone but especially those still without power: do not use generators or grills inside as carbon monoxide poisoning can result! #CAwx https://x.com/NWSBayArea/status/2005393544391856476

3 months ago 7 3 0 0
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MTR issues Cold Weather Advisory valid at Dec 29, 1:00 AM PST for 9 forecast zones in [CA] till Dec 29, 9:00 AM PST Link

3 months ago 0 1 0 0
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Rapidly intensifying winter storm to strike Ontario with snow, ice, and high winds A powerful bomb cyclone is forecast to strike Ontario bringing heavy snow, freezing rain, and severe winds from Sunday through Tuesday, December 28 to 30, 2025, as the deepening low crosses the Great…

Rapidly intensifying winter storm to strike Ontario with snow, ice, and high winds #weather #Ontario #Canada
watchers.news/2025/12/28/r...

3 months ago 1 0 0 0
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Major winter storm prompts Blizzard Warnings across Minnesota, Iowa, Wisconsin, and Michigan, U.S. Blizzard warnings have been issued across the Upper Midwest from Sunday into Monday, December 28–29, 2025, as a powerful winter storm moves toward the Great Lakes, bringing blizzard conditions to…

Major winter storm prompts Blizzard Warnings across Minnesota, Iowa, Wisconsin, and Michigan, U.S.
#weather #blizzardwarning
watchers.news/2025/12/28/m...

3 months ago 0 0 0 0
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Winter Storm Ezra – Multi-hazard winter storm forecast to bring blizzard conditions and significant icing to Upper Midwest, Great Lakes and Northeast Winter Storm Ezra is forecast to bring severe winter weather across large parts of the United States from Sunday through Tuesday, December 28–30, 2025, as it moves from the Great Lakes into southern…

Winter Storm Ezra – Multi-hazard winter storm forecast to bring blizzard conditions and significant icing to Upper Midwest, Great Lakes and Northeast
watchers.news/2025/12/28/w...

3 months ago 1 1 0 0
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Temperatures are expected to cool throughout this week with below normal temperatures returning for locations within the marine layer. #CAwx https://x.com/NWSBayArea/status/1955124256150327738

8 months ago 7 1 1 0
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Heading to the beach today? Be aware - there will be an increased risk for sneaker waves and rip currents due to long period southwesterly swell. Never turn your back on the ocean! #CAwx https://x.com/NWSBayArea/status/1954879384533254317

8 months ago 3 2 0 0
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Long period swell from the southwest will impact our coastline through Tuesday with some sneaker waves and increased current activity. Never turn your back on the ocean. When in doubt don't go out. #CAwx #BayAreaWX https://x.com/NWSBayArea/status/1955019312600633775

8 months ago 3 1 0 0

We're concerned about elevated fire weather conditions through the weekend into beginning of next week, fire starts like this have the potential for rapidly spreading. Be careful out there, only you can prevent wildfires! #CAwx @ALERTCalifornia ... https://x.com/NWSBayArea/status/1953601889565593720

8 months ago 6 2 0 1
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Hot days inland, busy days at the beach Long period SW swell will cause increased currents and a low end chance of sneaker waves. Know before you go. Swim at lifeguarded beaches. See alt text for the deep dive. https://x.com/NWSBayArea/status/1953553722128335004

8 months ago 3 1 0 0
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Las temperaturas cálidas pueden aumentar rápidamente a niveles peligrosos - especialmente en el verano y en autos estacionados. Manténgase #ListoMeteorológicamente y no subestime el calor #NIHHIS @HeatGov weather.gov/heat https://x.com/NWSBayArea/status/1953479999840759933

8 months ago 0 1 0 0
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During a heat wave, practice heat safety wherever you are. Heat related deaths and illnesses are preventable! @HeatGov weather.gov/heat https://x.com/NWSBayArea/status/1953478740912017808

8 months ago 2 1 0 0
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IEM :: AWW from NWS MTR AWW issued by NWS SFO at 04 Aug 2025 09:06 UTC

MTR issues Airport Weather Warning (AWW) at Aug 4, 2:06 AM PDT ...AIRPORT WEATHER WARNING IN EFFECT FROM 2 PM THIS AFTERNOON TO 9 PM PDT THIS EVENING FOR SFO AIRPORT... #weather #SFO #SFBA
mesonet.agron.iastate.edu/wx/afos/p.ph...

8 months ago 0 0 0 0
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Hundreds of vehicles stranded as rare snowstorm hits New South Wales, Australia Up to 50 cm (20 inches) of snow fell across elevated areas of New South Wales’ Northern Tablelands on Saturday, August 2, 2025, as a rare winter storm disrupted transport and triggered widespread…

Hundreds of vehicles stranded as rare snowstorm hits New South Wales, Australia

Around 200 vehicles were stranded due to the severe weather, with the State Emergency Services responding to 745 weather related incidents in just 24 hours. #snowstorm #NSW #Australia
watchers.news/2025/08/02/h...

8 months ago 0 0 0 0