Issued at 955 AM PDT Mon Mar 31 2025
Scattered light showers continue to move on shore and track E-NE late this morning. Added a mention of isolated thunderstorms across the North Bay for this afternoon and early evening. An upper level low positioned offshore of the Pacific Northwest will begin to move inland tonight and early tomorrow morning. The best instability is well to our north, however cannot rule out isolated thunderstorms this afternoon in areas that see enough clearing and subsequent increased diabatic heating.
Issued at 201 AM PDT Mon Mar 31 2025
Rain, wind, and a slight chance for thunderstorms through tomorrow. Warming and drying trend kicks off Wednesday.
, (Today and tonight) Issued at 201 AM PDT Mon Mar 31 2025
The last day of March will be pretty March-y as a cold front will continue to trek across the region from northwest to southeast through the morning hours. As a result, expect rainfall to increase in coverage and intensity and southwesterly winds to strengthen and veer. Rainfall totals up to 0.50" can be expected with locally higher totals up to 1.00" expected in the North Bay Mountains and along the Big Sur Coast. Widespread wind gusts of 20-30 mph, gusts up to 45 mph in the higher terrain are expected. There's a slight (15%) chance for thunderstorms for most of the area through tomorrow afternoon. As is typical for the region, a low CAPE high shear regime can be expected with conditionally unstable lapse rates at best. The driver seems to be post-frontal clearing allowing for the surface to heat below recent cold air advection aloft making the atmosphere unstable. If a thunderstorm were to develop, the primary hazards will be lightning, locally heavy rainfall and gusty winds, and small hail.
..(Tuesday through Sunday) Issued at 201 AM PDT Mon Mar 31 2025
The parent low and an attendant coastal trough will sweep through on Tuesday bringing with it widespread rainfall, gusty winds, and a slight (15%) chance for thunderstorms. Widespread rainfall totals up to 0.25" are expected with the higher terrain receiving up to 1.00". Westerly winds will strengthen and veer through the day with widespread wind gusts of 20-30 mph, up to 45 mph expected in the higher terrain. Wednesday kicks off the warming and drying trend as global ensemble clusters suggest it is likely that a ridge of high pressure will build into the Eastern Pacific Ocean and drift eastward through the week resulting in above normal temperatures by the weekend.
(12z TAFS) Issued at 448 AM PDT Mon Mar 31 2025
A cold front will move through this morning, bringing periods of light rain, strong WSW wind and a slight chance for thunderstorms through the TAF period. Behind the front, there will be a break in precipitation through the mid to late morning. In the afternoon the precipitation mode will change to showers, with MVFR-VFR ceilings and some Sun breaks. Showers and gusty winds will continue well into Tuesday.
(today through Saturday) Issued at 955 AM PDT Mon Mar 31 2025
A cold front is moving through the coastal zones bringing scattered showers, strong westerly wind, and a slight chance for thunderstorms through the day. By Tuesday, a large W-NW swell will build as the strong breeze shifts from W to NW. Significant wave heights will peak at around 15 feet Tuesday before subsiding Wednesday.
Ca, None. PZ, Small Craft Advisory from 9 AM to 9 PM PDT Tuesday for Mry Bay- Pigeon Pt to Pt Pinos 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm-SF Bay N of Bay Bridge.
Small Craft Advisory until 9 PM PDT Tuesday for Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM.
Small Craft Advisory from 9 PM this evening to 9 PM PDT Tuesday for Pigeon Pt to Pt Pinos 10-60 NM.
