Sunrise 6:12 AM   Sunset 7:56 PM Moonrise 12:00 AM   Moonset 8:15 AM

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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 215 Pm Pdt Sun Apr 28 2024
.small craft advisory in effect through late tonight - .
Today - NW winds 20 to 30 knots. Gusts up to 30 knots this afternoon. Tonight - W winds 10 to 20 knots with gusts up to 30 knots. Mon - NW winds 15 to 25 knots with gusts up to 30 knots. Mon night - NW winds 15 to 25 knots with gusts up to 30 knots. Tue - W winds 10 to 15 knots with gusts up to 25 knots. Tue night - NW winds 10 to 15 knots with gusts up to 25 knots. Wed - NW winds 15 to 20 knots with gusts up to 30 knots. Thu - W winds 10 to 15 knots.

PZZ500 215 Pm Pdt Sun Apr 28 2024
Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
high pressure over the eastern pacific and low pressure inland will maintain strong northerly winds over the coastal waters and bays through the remainder of today. Winds will be strongest over the outer waters and along the big sur coast. The strong winds will produce fresh steep wind waves and hazardous conditions. Winds continue to increase during the first half of the week lasting through Thursday. Moderate period northwesterly swell will continue to move through the waters through Thursday causing wave heights up to 12 feet.

FXUS66 KMTR 282143 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 243 PM PDT Sun Apr 28 2024

New SHORT TERM, LONG TERM

SYNOPSIS
Issued at 1227 AM PDT Sun Apr 28 2024

High pressure brings quiet weather and slowly warming temperatures this week. Breezy onshore winds will keep temperatures along the coast cooler however.

SHORT TERM
(This evening through Monday)
Issued at 225 PM PDT Sun Apr 28 2024

Almost a repeat of Saturday weather wise: ample sunshine with fair weather cumulus, warming trend continues, and breezy to gusty onshore flow. Warmest inland temperatures will approach 80 degrees this afternoon, but will likely fall short by a degree or two. Closer to the coast and bays is much cooler thanks to the persistent onshore flow off the chilly coastal waters. Onshore flow is still showing gusts of 30-40 mph along the coast, gaps/passes, and higher terrain. For the curious weather watcher looking at satellite imagery this afternoon it's always impressive to see standing wave clouds form upwind of coastal terrain. Case in point are the line of the clouds near Pt Reyes, San Mateo coast, and Monterey Peninsula. For the weather geek, flow in the marine boundary layer is forced to decelerate as it hits the terrain causing a wave like feature to form and in this case an undular bore or visually the standing wave cloud.

Large zonal flow remains over the region tonight and early Monday.
A tight shortwave trough will zip through the zonal flow just north of CA early Monday. While this feature will be dry it will however give a re-enforcing shot of northwest winds over the coastal waters, gaps/passes, and higher terrain on Monday. While not strong enough for a Wind Advisory, gale force conditions will impact the coastal water. Similar to Sunday morning, patchy stratus will once again be possible early Monday. Monday afternoon will once again feature mostly sunny skies, patchy coastal stratus, and mild temperatures across the interior.

LONG TERM
(Monday night through next Sunday)
Issued at 236 PM PDT Sun Apr 28 2024

Subtle riding offshore/barely for CA develops through midweek as an upper low digs/sweeps through the Great Basin. Pretty quiet weather for the week as temperatures will warm gradually and onshore winds decrease. Interior locations will see more widespread 80s with Heat Risk values creeping into the minor category. Patchy night and morning stratus will be possible each day.

Heading into next week the longwave pattern begins to change and become more amplified. An upper low will move into the PacNW by Friday and become more of an open wave/upper trough by Saturday.
This feature will bring the tail end of a weak front across NorCal. As such, light rain is now in the forecast for the far North Bay Saturday night/Sunday morning. Not much QPF, but a few hundredths possible at this point.

Taking a peak farther down the road, clusters and ensembles show a deeper low/upper trough moving into the PacNW the first week of May. This will likely bring cooler temperatures and increased chances for precip. Latest CPC 8-14 day outlook follows that thinking through May 12.

AVIATION
(18Z TAFS)
Issued at 1040 AM PDT Sun Apr 28 2024

Morning MVFR/IFR cigs continue to dissipate with KSFO the only one still showing a cig. The bigger story through the taf period will be the winds. Stronger onshore flow will keep gusty winds in place. VFR tonight with the exception of a few cigs impacting KMRY and KSNS late tonight through early Monday.

Vicinity of SFO...Classic pesky feed situation for KSFO as cigs spill over the runway. Did amend taf early for cigs through 18Z.
Latest meso vis satellite finally shows a thinning of the feed with cigs staying closer to the gap. Winds are strong out of the NW with gusts close to 35 kts this afternoon. The sustained winds will likely impact runway pattern on the 01s due to strong crosswind. AWW criteria will be very close, but for now gusts to 34 kts in the taf.

SFO Bridge Approach...No impact from cigs. SKC. Still dealing with gusty NW winds through approach zone.

Monterey Bay Terminals...VFR for now. Will need to keep an eye out for developing cigs through the afternoon for KMRY as strong NW flow piles up over the peninsula. Do have cigs returning late tonight.

MARINE
(Today through Friday)
Issued at 1040 AM PDT Sun Apr 28 2024

High pressure over the Eastern Pacific and low pressure inland will maintain strong northerly winds over the coastal waters and bays today. Winds will be strongest over the outer waters and along the Big Sur coast. The strong winds will produce fresh steep wind waves and hazardous conditions. Winds continue to increase during the first half of the week lasting through Thursday.
Moderate period northwesterly swell will continue to move through the waters through Thursday causing wave heights up to 12 feet.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory until 3 AM PDT Monday for SF Bay N of Bay Bridge.

Small Craft Advisory until 9 PM PDT Monday for Mry Bay-Pigeon Pt to Pt Pinos 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.

Small Craft Advisory until 9 AM PDT Monday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM.

Gale Warning from 9 AM to 9 PM PDT Monday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM.

Gale Warning until 9 PM PDT Monday for Pt Pinos to Pt Piedras Blancas 0-10 nm.

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Alameda Creek
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Sun -- 12:14 AM PDT     Moonrise
Sun -- 03:08 AM PDT     5.81 feet High Tide
Sun -- 06:15 AM PDT     Sunrise
Sun -- 09:16 AM PDT     Moonset
Sun -- 11:44 AM PDT     -0.18 feet Low Tide
Sun -- 06:12 PM PDT     4.19 feet High Tide
Sun -- 07:56 PM PDT     Sunset
Sun -- 11:16 PM PDT     0.91 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Alameda Creek, San Francisco Bay, California, Tide feet

Dumbarton Point 2.3 mi NE
Click for Map
Sun -- 12:14 AM PDT     Moonrise
Sun -- 01:00 AM PDT     0.69 knots Max Flood
Sun -- 03:27 AM PDT     -0.00 knots Slack
Sun -- 06:15 AM PDT     Sunrise
Sun -- 08:53 AM PDT     -1.26 knots Max Ebb
Sun -- 09:17 AM PDT     Moonset
Sun -- 11:34 AM PDT     0.01 knots Slack
Sun -- 02:25 PM PDT     1.12 knots Max Flood
Sun -- 06:17 PM PDT     -0.00 knots Slack
Sun -- 07:56 PM PDT     Sunset
Sun -- 09:38 PM PDT     -0.41 knots Max Ebb
Sun -- 10:54 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current, knots

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