textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 1218 AM PDT Tue May 5 2026

- Cool temperatures and cloudy with light rain ending this morning

- Warmer and drier conditions return for the middle of the week through the weekend

SHORT TERM

Issued at 1218 AM PDT Tue May 5 2026 (today and tonight)

Rain totals over the North Bay have so far varied from 0.10" to as much as 0.50". Steady light to moderate rain will continue to move southward across the rest of the Bay Area through morning, likely affecting the morning commute with wet roads. A few areas of light drizzle and/or light rain may reach the north Central Coast. Isolated instability did produce a couple thunderstorms Monday evening. One thunderstorm developed over the coastal waters southwest of Point Arena and another over far northern Napa County. The 500 mb low pressure system is beginning to pick up speed and will move eastward while caught up in the subtropical jet stream. The rain diminishes later in the morning with drier conditions returning, however it may take some time for the sun to break through the clouds later today. Highs today are forecast to reach the 60s.

Cloudy with patchy fog tonight with temperatures lowering to the 50s and 40s.

LONG TERM

Issued at 1218 AM PDT Tue May 5 2026 (Wednesday through Monday)

There's good global model agreement that a high pressure system will move in across the forecast area during this timeframe. Expect dry weather along with a warming trend from mid to late week and the weekend. Compressional warming aloft and surface warming will result in above to well above normal high temperatures by late in the week and weekend. Far inland locations will reach the 80s and 90s. Moderate HeatRisk likely develops over inland locations by Sunday. Please stay tuned to the latest updates.

AVIATION

(06Z TAFS) Issued at 921 PM PDT Mon May 4 2026

Precip is finally trending southward toward SF Bay and ending for the N Bay. Despite some precip CIGs remain rather high with VFR and occasional MVFR. Will keep this trend through early Tuesday AM. The farther south the precip moves it will begin to fade more too. SJC will only have VCSH and MRY/SNS remain dry. Some clearing expected Tuesday with VFR. Tuesday evening residual moisture will bring a lot of strato-cu to the region with MVFR CIGs.

Vicinity of SFO...VFR this evening with light rain and MVFR CIGs possible by Tuesday AM. VFR expected for Tuesday afternoon with a few CU. MVFR CIGs return Tuesday evening.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR and dry. No precip expected later, but some MVFR CIGs possible then VFR Tuesday afternoon with nearby CU.

MARINE

(Tonight through next Sunday) Issued at 921 PM PDT Mon May 4 2026

Unsettled weather over the northern waters with passing showers due to a weak weather system moving through early Tuesday. light to gentle northerly breezes will persist Tuesday. Light wind and seas continue through Wednesday as high pressure builds. Northerly wind and seas increase Thursday into the weekend as more typically strong springtime onshore surface pressure gradients develop over the waters.

MTR WATCHES/WARNINGS/ADVISORIES

CA...None. PZ...None.