Weather

Link to Local Radar Data

Radar

Link to Satellite Data

Satellite

National Digital Forecast Database Maximum Temperature Forecast

Max Temps

National Digital Forecast Database Weather Element Forecast

Graphical Forecast

Area Forecast Discussion

FXUS66 KMTR [Monterey CA] 191654 AFDMTR 

FXUS66 KMTR 191654
AFDMTR [HEAD]

National Weather Service San Francisco Bay Area 8:54am PST Sun Jan 19 2020 

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
854 AM PST SUN JAN 19 2020 [HEAD]

Synopsis. High pressure building over the West Coast will result in dry and seasonably cool weather conditions through the weekend. Light rain is possible starting Monday, with higher chances of precipitation developing by Tuesday. Mostly dry conditions are then expected for the remainder of next week, with rain possibly returning next weekend. 

.SYNOPSIS... HIGH PRESSURE BUILDING OVER THE WEST COAST WILL
RESULT IN DRY AND SEASONABLY COOL WEATHER CONDITIONS THROUGH THE
WEEKEND. LIGHT RAIN IS POSSIBLE STARTING MONDAY, WITH HIGHER
CHANCES OF PRECIPITATION DEVELOPING BY TUESDAY. MOSTLY DRY
CONDITIONS ARE THEN EXPECTED FOR THE REMAINDER OF NEXT WEEK, WITH
RAIN POSSIBLY RETURNING NEXT WEEKEND. [DISC]

Discussion. As of 08:50am PST Sunday… the ongoing forecast through the short-term remains on track this morning with no updates needed at this time. Temperatures are generally in the upper 30s to upper 40s region-wide at this hour with high clouds streaming inland overhead. While patchy dense fog has been reported at the byron, California site in the far interior East Bay, fog is less widespread over the region this morning. For additional information, please see the previous forecast discussion below. 

.DISCUSSION...AS OF 08:50 AM PST SUNDAY...THE ONGOING FORECAST
THROUGH THE SHORT-TERM REMAINS ON TRACK THIS MORNING WITH NO
UPDATES NEEDED AT THIS TIME. TEMPERATURES ARE GENERALLY IN THE
UPPER 30S TO UPPER 40S REGION-WIDE AT THIS HOUR WITH HIGH CLOUDS
STREAMING INLAND OVERHEAD. WHILE PATCHY DENSE FOG HAS BEEN
REPORTED AT THE BYRON, CA SITE IN THE FAR INTERIOR EAST BAY, FOG
IS LESS WIDESPREAD OVER THE REGION THIS MORNING. FOR ADDITIONAL
INFORMATION, PLEASE SEE THE PREVIOUS FORECAST DISCUSSION BELOW. [DISC]

Previous discussion… as of 3:39am PST Sunday. High clouds continue to stream over the area, and temperatures are running a few degrees warmer than yesterday at this time with readings ranging from the upper 30s to upper 40s. Currently, the only observation indicating fog is byron, in the East Bay, reporting a visibility of less than 1/4 of a mile. Highs today are expected to be a few degrees than yesterday as the upper ridge axis moves over the state. Highs from the mid 50s to mid 60s are expected. 

.PREV DISCUSSION...AS OF 3:39 AM PST SUNDAY...HIGH CLOUDS
CONTINUE TO STREAM OVER THE AREA, AND TEMPERATURES ARE RUNNING A
FEW DEGREES WARMER THAN YESTERDAY AT THIS TIME WITH READINGS
RANGING FROM THE UPPER 30S TO UPPER 40S. CURRENTLY, THE ONLY
OBSERVATION INDICATING FOG IS BYRON, IN THE EAST BAY, REPORTING A
VISIBILITY OF LESS THAN 1/4 OF A MILE. HIGHS TODAY ARE EXPECTED TO
BE A FEW DEGREES THAN YESTERDAY AS THE UPPER RIDGE AXIS MOVES
OVER THE STATE. HIGHS FROM THE MID 50S TO MID 60S ARE EXPECTED. [DISC]

An approaching upper level trough will bring increased cloudiness to the area on Monday leading to rain chances later on Monday. This trough is forecast to bring light rain to most of the forecast area late Monday night through Tuesday. A separate disturbance is forecast to bring moisture into Southern California ahead of the upper trough, and the ECMWF [European Center for Medium-Range Weather Forecasts model] still indicates some precipitation chances across the southern counties including Monterey and San Benito by Monday afternoon, before the upper trough arrives. Rain chances will then increase from north to south late Monday night and Tuesday morning as the main frontal system arrives. Rainfall is forecast to be mostly light, but may be moderate at times in the North Bay. Most rain should end by late Tuesday, although a few showers may linger into Tuesday night. As much as three-quarters of an inch or rain is forecast in the North Bay through late Tuesday, with generally a third of an inch of less expected elsewhere in our forecast area. 

AN APPROACHING UPPER LEVEL TROUGH WILL BRING INCREASED CLOUDINESS
TO THE AREA ON MONDAY LEADING TO RAIN CHANCES LATER ON MONDAY.
THIS TROUGH IS FORECAST TO BRING LIGHT RAIN TO MOST OF THE
FORECAST AREA LATE MONDAY NIGHT THROUGH TUESDAY. A SEPARATE
DISTURBANCE IS FORECAST TO BRING MOISTURE INTO SOUTHERN CALIFORNIA
AHEAD OF THE UPPER TROUGH, AND THE ECMWF STILL INDICATES SOME
PRECIP CHANCES ACROSS THE SOUTHERN COUNTIES INCLUDING MONTEREY AND
SAN BENITO BY MONDAY AFTERNOON, BEFORE THE UPPER TROUGH ARRIVES.
RAIN CHANCES WILL THEN INCREASE FROM NORTH TO SOUTH LATE MONDAY
NIGHT AND TUESDAY MORNING AS THE MAIN FRONTAL SYSTEM ARRIVES.
RAINFALL IS FORECAST TO BE MOSTLY LIGHT, BUT MAY BE MODERATE AT
TIMES IN THE NORTH BAY. MOST RAIN SHOULD END BY LATE TUESDAY,
ALTHOUGH A FEW SHOWERS MAY LINGER INTO TUESDAY NIGHT. AS MUCH AS
THREE-QUARTERS OF AN INCH OR RAIN IS FORECAST IN THE NORTH BAY
THROUGH LATE TUESDAY, WITH GENERALLY A THIRD OF AN INCH OF LESS
EXPECTED ELSEWHERE IN OUR FORECAST AREA. [DISC]

Mostly dry conditions are expected through the remainder of the week with an upper ridge pushing the moisture to the north. The next rain chances look to be late next weekend when another trough approaches the area. 

MOSTLY DRY CONDITIONS ARE EXPECTED THROUGH THE REMAINDER OF THE
WEEK WITH AN UPPER RIDGE PUSHING THE MOISTURE TO THE NORTH. THE
NEXT RAIN CHANCES LOOK TO BE LATE NEXT WEEKEND WHEN ANOTHER TROUGH
APPROACHES THE AREA. [DISC]

Aviation. As of 08:50am PST Sunday… for 18Z [10am PST] TAFs [Terminal Aerodrome Forecasts]. VFR [Visual Flight Rules]. High clouds at or above 10,000 ft will continue to stream over the region with generally light/variable winds. Predominantly NE to NW winds are forecast by this afternoon. While there is the potential for fog in the North Bay and East Bay valleys on Monday morning, confidence remains low for development. 

.AVIATION...AS OF 08:50 AM PST SUNDAY...FOR 18Z TAFS. VFR. HIGH
CLOUDS AT OR ABOVE 10,000 FT WILL CONTINUE TO STREAM OVER THE
REGION WITH GENERALLY LIGHT/VARIABLE WINDS. PREDOMINANTLY NE TO NW
WINDS ARE FORECAST BY THIS AFTERNOON. WHILE THERE IS THE
POTENTIAL FOR FOG IN THE NORTH BAY AND EAST BAY VALLEYS ON MONDAY
MORNING, CONFIDENCE REMAINS LOW FOR DEVELOPMENT. [AVIA]

Vicinity of KSFO [San Francisco CA]VFR [Visual Flight Rules]. Generally light SE winds this morning will reamin offshore through a majority of the day. Wind speeds will likely remain below 10 kt [12 mph] through the forecast period. 

VICINITY OF KSFO...VFR. GENERALLY LIGHT SE WINDS THIS MORNING
WILL REAMIN OFFSHORE THROUGH A MAJORITY OF THE DAY. WIND SPEEDS
WILL LIKELY REMAIN BELOW 10 KT THROUGH THE FORECAST PERIOD. [AVI2]

SFO [San Francisco CA] bridge approach… similar to KSFO [San Francisco CA]

SFO BRIDGE APPROACH...SIMILAR TO KSFO. [AVI2]

Monterey Bay terminals… VFR [Visual Flight Rules]. Light SE winds this morning aside from locally breezy winds down the Salinas Valley around 15 kt [17 mph]. NW to NE winds develop by the afternoon. 

MONTEREY BAY TERMINALS...VFR. LIGHT SE WINDS THIS MORNING ASIDE
FROM LOCALLY BREEZY WINDS DOWN THE SALINAS VALLEY AROUND 15 KT. NW
TO NE WINDS DEVELOP BY THE AFTERNOON. [AVI2]

Marine. As of 08:50am PST Sunday… generally light to moderate offshore winds will persist across the coastal waters today as high pressure remains over the Great Basin. Winds will increase and turn southerly on Monday ahead of an approaching frontal system. Moderate northwest swell will continue through the afternoon generating hazardous seas conditions for small vessels. A larger northwest swell will arrive mid week. 

.MARINE...AS OF 08:50 AM PST SUNDAY...GENERALLY LIGHT TO MODERATE
OFFSHORE WINDS WILL PERSIST ACROSS THE COASTAL WATERS TODAY AS
HIGH PRESSURE REMAINS OVER THE GREAT BASIN. WINDS WILL INCREASE
AND TURN SOUTHERLY ON MONDAY AHEAD OF AN APPROACHING FRONTAL
SYSTEM. MODERATE NORTHWEST SWELL WILL CONTINUE THROUGH THE
AFTERNOON GENERATING HAZARDOUS SEAS CONDITIONS FOR SMALL VESSELS.
A LARGER NORTHWEST SWELL WILL ARRIVE MID WEEK. [AVIA]

MTR Watches/Warnings/Advisories

  • Today: Small Craft AdvisoryPt Arena [Mendocino CA] to Pt Reyes [San Francisco CA] 0–10 nm [11 miles] until 3pm Small Craft AdvisoryPt Reyes [San Francisco CA] to Pigeon Pt [Pescadero CA] 0–10 nm [11 miles] until 3pm Small Craft AdvisoryPt Arena [Mendocino CA] to Pigeon Pt [Pescadero CA] 10–60 nm [69 miles] until 3pm Small Craft AdvisoryPigeon Pt [Pescadero CA] to Pt Piedras Blancas [San Simeon CA] 10–60 nm [69 miles] until 3pm 
.MTR WATCHES/WARNINGS/ADVISORIES...
.TDAY...SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 3 PM
SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 3 PM
SCA...PT ARENA TO PIGEON PT 10-60 NM UNTIL 3 PM
SCA...PIGEON PT TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 3 PM [WARN]

Public Forecast: Rgass/Sims; Aviation: Rgass; Marine: Rgass 

PUBLIC FORECAST: RGASS/SIMS
AVIATION: RGASS
MARINE: RGASS [CRED]
VISIT US AT WWW.WEATHER.GOV/SANFRANCISCO [LINK]

Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/nwsbayarea www.twitter.com/nwsbayarea www.youtube.com/nwsbayarea 

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA [DISC]

Point Forecast

Montara CA

19 Jan 10:40am PST

Today Cloudy, with a high near 57°. East wind 5 to 9 mph becoming light and variable in the afternoon.
Tonight Cloudy, with a low around 50°. ESE wind 5 to 7 mph becoming calm.
M.L.King Day A 10% chance of rain after 4pm. Mostly cloudy, with a high near 57°. South wind 8 to 13 mph.
Monday Night A 30% chance of rain, mainly after 10pm. Mostly cloudy, with a low around 51°. Breezy, with a south wind 20 to 22 mph, with gusts as high as 26 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Rain likely, mainly before 4pm. Cloudy, with a high near 56°. Breezy, with a south wind 26 to 29 mph, with gusts as high as 37 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night A 40% chance of rain before 10pm. Mostly cloudy, with a low around 50°. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Partly sunny, with a high near 57°.
Wednesday Night Partly cloudy, with a low around 49°.
Thursday Partly sunny, with a high near 57°.
Thursday Night Mostly cloudy, with a low around 51°.
Friday Mostly sunny, with a high near 58°.
Friday Night A slight chance of rain. Partly cloudy, with a low around 52°.
Saturday A chance of rain. Mostly sunny, with a high near 58°.
Today
Cloudy, with a high near 57. East wind 5 to 9 mph becoming light and variable in the afternoon.
Tonight
Cloudy, with a low around 50. East southeast wind 5 to 7 mph becoming calm.
M.L.King Day
A 10 percent chance of rain after 4pm. Mostly cloudy, with a high near 57. South wind 8 to 13 mph.
Monday Night
A 30 percent chance of rain, mainly after 10pm. Mostly cloudy, with a low around 51. Breezy, with a south wind 20 to 22 mph, with gusts as high as 26 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain likely, mainly before 4pm. Cloudy, with a high near 56. Breezy, with a south wind 26 to 29 mph, with gusts as high as 37 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
A 40 percent chance of rain before 10pm. Mostly cloudy, with a low around 50. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Partly sunny, with a high near 57.
Wednesday Night
Partly cloudy, with a low around 49.
Thursday
Partly sunny, with a high near 57.
Thursday Night
Mostly cloudy, with a low around 51.
Friday
Mostly sunny, with a high near 58.
Friday Night
A slight chance of rain. Partly cloudy, with a low around 52.
Saturday
A chance of rain. Mostly sunny, with a high near 58.

This page is generated dynamically from the National Weather Service's NWS point forecast and Area Forecast Discussion, reformatted for readability. NWS glossary; about point forecasts. For more information, visit the Lobitos Weather Project home page. Comments and corrections are welcome: