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Current watches, warnings, and advisories for San Francisco Bay Shoreline (CAZ508) CA
Last Update: May 9 2025 at 8:00 pm EDT
Current watches, warnings, and advisories for Alameda County (CAC001) CA
Last Update: May 9 2025 at 8:00 pm EDT
Current watches, warnings, and advisories for PZZ531
Last Update: May 15 2025 at 11:38 pm EDT
Small Craft Advisory
- Issued May 15 at 8:38PM PDT until May 17 at 3:00AM PDT
- by NWS San Francisco CA
San Francisco Bay South of the Bay Bridge
* WHAT...West winds 10 to 21 kt and choppy waters expected.

* WHERE...San Francisco Bay South of the Bay Bridge.

* WHEN...From 3 PM Friday to 3 AM PDT Saturday.

* IMPACTS...Conditions will be hazardous to small craft.

Updated: @ 16-May-2025 2:10am - next update at 2:20am

Summary / Temperature

Wind

Rain

Outlook

clear

55.7°F

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Feels like: 56°F

24-hr difference
2.3°F

	Today	Yesterday
High:	55.7°F 2:04am	73.3°F 2:26pm
Low:	55.2°F 12:15am	49.5°F 5:39am

	W 0.2 Gust: 0.0
0 Bft - Calm
Today: 2.3 12:22am
Gust Month: 23.0 May 3

Rain Today:	0.00 in
Rain Rate (/hr):	0.000 in
Rain Yesterday:	0.00 in
Storm Rain:	0.00 in
This Month:	0.14 in
Season Total:	9.87 in
1 rain day in May.

Friday

Sunny

Sunny

Humidity & Barometer

Almanac

Moon

Humidity:	78 %
Dew Point:	48.9°F
Barometer:	29.906 inHg
Baro Trend:	Steady

Sunrise:	5:57am
Sunset:	8:11pm
Moonrise:	11:35pm
Moonset:	8:38am

Waning Gibbous

88%
Illuminated

UV Index

Solar Radiation

0.0 None

High: 0.0 @ 12:00am

0 W/m² (0 %)

High: 0 @ 12:00am

The Watchers

First visible-light aurora on Mars detected from the surface

May 15 2025 at 17:05:00 UTC

A visible aurora has been recorded from the surface of Mars for the first time. NASA’s Perseverance rover detected a faint green glow of atomic oxygen triggered by a solar storm, confirming long-standing predictions about atmospheric emissions. The detection provides a new way to study Martian space weather from the surface.
Source
Ashfall blankets Kagoshima City after eruption at Sakurajima volcano, Japan

May 15 2025 at 12:38:14 UTC

Three eruptions were recorded at Sakurajima volcano in Kagoshima Prefecture, Japan, on May 15, 2025, with ash plumes reaching heights over 4 200 m (13 800 feet) above sea level. Ashfall was reported in Kagoshima City, reducing visibility on city roads.
Source
The Weekly Volcanic Activity Report: May 7–13, 2025

May 15 2025 at 11:16:20 UTC

New activity/unrest was reported for five volcanoes from May 7 to 13, 2025. During the same period, ongoing activity was reported for 20 volcanoes.
Source
Jet fuel leak in Pennsylvania contaminates drinking water and prompts investigations

May 15 2025 at 09:07:00 UTC

A jet fuel leak from Sunoco Pipeline’s Twin Oaks Pipeline in Bucks County, Pennsylvania, confirmed on January 31, 2025, has contaminated at least 38 private wells, prompting lawsuits and investigations. The leak, undetected for months, was first reported by residents in 2023.
Source
Enhanced Risk issued for May 16 as tornadoes and severe storms threaten Ohio and Mississippi valleys, U.S.

May 15 2025 at 08:25:00 UTC

A widespread severe weather threat is expected on Friday, May 16, 2025, as a strong low-pressure system moves from the Upper Midwest into the Ohio and Mississippi valleys, affecting Kentucky, Tennessee, Arkansas, Missouri, Illinois, and Ohio.
Source
Massive hailstorm in Beijing shatters windshields, causes traffic and flight chaos

May 15 2025 at 07:50:29 UTC

A severe hailstorm struck Beijing on May 13, 2025, producing hailstones up to 4 cm (1.6 inches) in diameter that caused widespread vehicle damage, disrupted traffic, and led to flight cancellations. The storm triggered multiple alerts from the Beijing Meteorological Observatory and impacted 13 districts.
Source
One person killed in Virginia as flash floods strike Mid-Atlantic

May 15 2025 at 03:04:11 UTC

A 12-year-old was found deceased in Albemarle County, Virginia, after flash floods struck parts of the Mid-Atlantic on Tuesday, May 13, 2025, prompting Flash Flood Emergencies in multiple counties and evacuations in areas including Westernport, Maryland.
Source
New research reveals bioelectrical coordination in trees during solar eclipse

May 14 2025 at 17:05:00 UTC

A recent study reveals that Norway spruce trees in the Italian Alps exhibited synchronized bioelectrical activity during the March 2015 solar eclipse. Using high-resolution sensors, researchers detected collective responses to the eclipse’s rapid environmental changes, indicating a potential shared signaling mechanism among trees.
Source
Eruption at Kanlaon produces pyroclastic flows, ash plume 7 km (4.3 miles) a.s.l, Philippines

May 14 2025 at 12:37:06 UTC

An explosive eruption occurred at the summit of Kanlaon volcano in the Philippines at 02:55 local time on May 13, 2025, prompting authorities to raise the Alert Level to Level 3 due to magmatic unrest and the potential for life-threatening volcanic hazards. Authorities have advised communities within 6 km (3.7 miles) of the summit crater to evacuate.
Source
Second earthquake swarm hits Campi Flegrei one day after state of emergency declaration

May 14 2025 at 09:14:07 UTC

A new earthquake swarm began in the Campi Flegrei caldera at 14:23 local time on May 14, 2025, just five hours after Italy’s National Institute of Geophysics and Volcanology (INGV) reported the end of a previous swarm that led to a state of emergency declaration.
Source