Lightnews — Scholar-powered news

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 2d

Another warm one tomorrow with mostly 80s all around (a few 90s possible inland) then eyes on the rain chances starting up later Thursday and into Friday. Medium range ensembles not quite seeing eye to eye on the pattern yet (other than higher totals north), thus we have this. Stay tuned. 10/6/2025

15

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 3d

Some offshore wind to start the week, mainly across the mountains, but the effects will be felt down to sea level with warm temperatures near the coast and inner bay. There is another chance for more rain later in the week, something to keep an eye on. 10/5/2025 @nbcbayarea.com

18

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 7d

Fall fast forward: some soaking rains are starting the day, should see more activity moving to the east later. Chance for some stronger showers, isolated T-storms esp North Bay Mtns… and yes, that is high elevation Sierra snow at times into tomorrow. #CAwx 10/2/2025

1 18

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 8d

As these things typically go this early in the season… top rain totals were in the North Bay, Mt Tam at 0.77” generally less than 0.10” elsewhere south. #CAwx 10/1/2025

1 10

Reposted by Rob Mayeda NBC Bay Area

Eos @eos.org · 8d

Seismic data from the #NASA #InSight mission reveal a solid inner core at the center of Mars.

Story by @javibar.bsky.social

eos.org/articles/sci...

Scientists May Have Finally Detected a Solid Inner Core on Mars - Eos

Seismic clues from NASA’s InSight mission suggest that Mars hides a solid inner core, and raise new questions about why the planet’s magnetic field disappeared.

eos.org

2 16 55

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 8d

Almost always … SFO issues are ceiling related, even if visibility or RVR is good. AWC 👀appears to be CIG. Not seeing anything crazy in the pilot reports, might possibly have a little bit of low level wind shear, as you noted with that change in wind direction.

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 8d

Wednesday being best for rain still looking good esp. late morning to midday timeframe. Should get some clearing Thursday-Friday although may see showers over the inland mtns during the afternoon, eyes on what that low does into the weekend for both wind (north/offshore) & precip east. Stay tuned.

1 7

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 11d

Smoke from a complex of fires in SW Oregon continues lingering in the Bay Area, although we should begin to see a reversal in that wind pattern with rain chances over the next couple of days that should help. @nbcbayarea.com #CAwx 9/28/2025

2 4 25

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 11d

Well… about that northward shift. Monday’s weather system coming in weaker in terms of rain chances. Follow up system Tuesday night until Wednesday may have better totals but again mainly north of SF. We’ll see if this trend continues with the evening model runs tonight. #CAwx 9/28/2025

1 18

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 11d

This visualization illustrates it a little bit better… should see better atmospheric mixing / air quality as the weather gets more active into Monday and through midweek. And hopefully quite a bit of rain on those fires to our north. #CAwx 9/27/2025

2 29

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 11d

Smoky conditions around the Bay Area, but no fires nearby… So what’s going on? Smoke from fires to our north is moving south along the coast and into the Bay Area. South winds increase tomorrow which should help some ahead of Monday rain chances later #CAwx 9/27/2025

3 3 30

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 12d

More clouds, breezy and cooler finish to the weekend ahead of the first storms of Fall next week (yes, a bit early) Although better rain totals likely stay north this really isn’t your typical September weather w/ daily rain averages mostly 0.01” or less. Stay tuned #CAwx 9/27/2025

4 18

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 12d

Ensemble wx models still in agreement, trending w/ significant rain totals especially north. National blend of wx models sees the same with high elevation snow potential. We’ll have to see if things take more of a northward shift as we get closer. Stay tuned! #CAwx 9/26/2025

2 1 20

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 13d

Yes, that was space junk spotted in our bay area skies this evening, video by Jamie Li spotted from San Mateo. As a general rule: meteors move much faster and usually end with a flash of light, space junk moves more slowly and can be easily followed across the sky. 9/25/2025 @nbcbayarea #spacejunk

10 17 74

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 14d

We may have broken dry September.
Stay tuned next wk. #CAwx 9/25/2025

1 25

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 14d

Strong thunderstorm prompting a special weather statement along the Diablo range / East Bay approaching midnight 9/24/2025 #CAwx

1 18

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 14d

Vivid lightning display approaching 10pm near Danville 9/24/2025 @nwsbayarea @nbcbayarea.com #CAwx

3 1 46

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 14d

9pm update: thunderstorms along the Diablo Range / East Bay, likely staying active into Thursday AM as well

3 1 16

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 15d

4pm update: showers continue including isolated thunderstorms approaching the Diablo Range from the SE. Shower chances will linger into early Thursday before shifting East. 9/24/2025 #CAwx

1 12

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 15d

Radar loop looks mostly aligned with the sharp range models bringing a chance of some rain at times and thunderstorms into the Bay Area tonight into Wednesday. 9/23/2025 #CAwx

2 20

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 17d

Heat on the way tomorrow but into tomorrow evening and night we will be watching radar for rain chances and isolated thunder into Wednesday. Still appears the Central Coast will see more precip regionally. Stay tuned. #CAwx 9/22/2025

1 17

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 17d

Updated shaking intensity map for the early morning 4.3 earthquake 3.1 miles from Piedmont 9/22/2025 #BayArea

2 2 22

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 17d

Preliminary magnitude 4.6 earthquake at 2:56am near Berkeley to start the morning 9/22/2025

10 8 69

Rob Mayeda NBC Bay Area @robmayeda.bsky.social · 19d

Fall begins… but weird September weather reigns. Dry offshore wind across the inland mountains into Monday. Temps will jump back into the 90s inland and 70s and 80s bayside. Then (weird) an upper level low brings a chance of showers and isolated thunder midweek. Stay tuned. 9/20/2025 @nbcbayarea

1 30

Reposted by Rob Mayeda NBC Bay Area

Anthony Edwards @edwardsanthonyb.bsky.social · 21d

From Caltrans District 8 on Facebook and CHP reports:

Highway 38 to Big Bear "completely washed out" from mudslides according to CHP on QuickMaps.
"Closed in both directions from Valley of the Falls to the bottom of South Fork," Caltrans said on Facebook

Photo credit: Caltrans

6 29 57