Marine Weather and Tides
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
|Sunrise 7:29AM||Sunset 6:18PM||Tuesday October 27, 2020 7:25 AM PDT (14:25 UTC)||Moonrise 4:10PM||Moonset 3:00AM||Illumination 82%|
7 Day Forecast for Marine Location Near Point Arena, CAHourly EDIT Help
Area Discussion for - San Francisco/Monterey Bay Area, CA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 271147 AFDMTR
Area Forecast Discussion National Weather Service San Francisco Bay Area 447 AM PDT Tue Oct 27 2020
SYNOPSIS. Critical fire weather conditions will persist in the North Bay Mountains, East Bay Hills and the Diablo Range into Tuesday afternoon where gusty winds persist. Elsewhere, winds will remain light, yet dry conditions will persist through midweek. High pressure will bring sunny, mild afternoons and cool overnights through the remainder of the week.
DISCUSSION. as of 02:30 AM PDT Tuesday . Moderate to locally gusty conditions persist early this morning in the higher ridges and peaks of interior portions of the North and East Bay with relative humidity in single digits to teens. Additionally, wind gusts range from 45-60 mph in the highest peaks. Critical fire weather conditions will continue in the aforementioned locations where a Red Flag Warning remains in effect through 5 PM PDT Tuesday. Elsewhere, breezy conditions continue in the hills wild light and variable winds are common in the region's lower elevations. That said, dry conditions persist for much of the region as a cool, dry air mass settles into the region. If not for mixing from the stronger winds aloft, temperatures in the interior valleys of the North and East Bay would likely be much cooler this morning. Currently, temperatures are in the upper 40s to lower 50s in these areas and will likely bottom out in the low/mid 40s with a few of the coldest spots cooling into the upper 40s. Meanwhile, interior portions of Monterey and San Benito Counties will likely see more widespread 30s this morning.
Winds will gradually ease region-wide through midweek with a slight increase in humidity expected during the latter half of the week. Thus, fire weather concerns will diminish through the remainder of the week. Dry conditions will prevail however for much of the week as high pressure over the eastern Pacific builds near the West Coast. This will result in mild daytime temperatures generally warming into the 70s to lower 80s under mostly sunny sky conditions. Overnight temperatures will range from the 40s to lower 50s for most urban areas while remaining slightly warmer in the hills.
Medium-range models indicate the ridge aloft will weaken slightly by the upcoming weekend as a weak storm system pushes inland over the Pacific Northwest. At this time, dry weather will most likely persist through the end of the month and into early November as the storm track remains to the north. The good news, there does not appear to be any indications of additional offshore wind events in the current extended forecast period.
AVIATION. as of 4:45 AM PDT Tuesday . Continued dry air mass in place with no marine air mass intrusion expected. Thus, widespread VFR with prevailing offshore flow through the sunrise to mid morning hours, transitioning to onshore flow by the afternoon to evening. Low level wind shear of 25-30kt from the NNE expected through the early morning hours for locations on the lee side of hills or mountains in the San Francisco Bay Area.
Vicinity of KSFO . VFR through the period. Light winds at the surface with stronger winds aloft may cause LLWS overnight.
SFO Bridge Approach . Similar to KSFO.
Monterey Bay Terminals . VFR. East to southeast winds after midnight could get as strong as 10-15 kt in the Salinas Valley through mid morning.
FIRE WEATHER. as of 02:30 AM PDT Tuesday . A red flag warning remains in effect for the North Bay Mountains, East Bay Hills and the Diablo Range until 5 pm PDT Tuesday. Moderate winds with gusts of 45-60 mph are likely in the higher elevations of the interior North and East Bay into this afternoon before gradually diminishing late in the day. High pressure keeps things dry all week with warm days and cool nights. While a well established marine layer may not develop until late week, humidity levels should gradually improve in the region's lower elevations.
MARINE. as of 04:45 AM PDT Tuesday . Generally light north winds across the waters today. Winds turn south along the immediate coast Tuesday night while remaining predominately light. A pair of northwest swell trains with a lighter southerly swell will mix with some weak wind waves through the period.
MTR WATCHES/WARNINGS/ADVISORIES. Tday. Red Flag Warning . CAZ507-511
PUBLIC FORECAST: RGass AVIATION: DRP MARINE: DRP FIRE WEATHER: RGass
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GEOS Local Image of CentralWestCoast EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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