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Area Forecast Discussion

FXUS66 KMTR [Monterey CA] 211726 AFDMTR 

FXUS66 KMTR 211726
AFDMTR [HEAD]

National Weather Service San Francisco Bay Area 9:26am PST Mon Jan 21 2019 

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
926 AM PST MON JAN 21 2019 [HEAD]

Synopsis. Residual showers are expected to continue this morning as a cold upper level low exits the area. Dry conditions are expected to prevail districtwide by mid morning. Dry weather, cool overnight temperatures, and progressively warmer days are then forecast through the end of next weekend as strong high pressure builds over the West Coast. 

.SYNOPSIS...RESIDUAL SHOWERS ARE EXPECTED TO CONTINUE THIS MORNING
AS A COLD UPPER LEVEL LOW EXITS THE AREA. DRY CONDITIONS ARE
EXPECTED TO PREVAIL DISTRICTWIDE BY MID MORNING. DRY WEATHER,
COOL OVERNIGHT TEMPERATURES, AND PROGRESSIVELY WARMER DAYS ARE
THEN FORECAST THROUGH THE END OF NEXT WEEKEND AS STRONG HIGH
PRESSURE BUILDS OVER THE WEST COAST. [DISC]

Discussion. As of 08:50am PST Monday… lingering showers over portions of the Central Coast continue to diminish in coverage this morning and should come to an end in the next hour or two. Meanwhile, sky conditions have cleared for much of the San Francisco Bay Area northward where temperatures cooled in the the 30s for the colder inland valley locations with 40s for the remainder of the region. Seasonably cool and breezy conditions will persist today with most locations warming into the 50s. With this said, the ongoing forecast remains on track and no updates are anticipated at this time. 

.DISCUSSION...AS OF 08:50 AM PST MONDAY...LINGERING SHOWERS OVER
PORTIONS OF THE CENTRAL COAST CONTINUE TO DIMINISH IN COVERAGE
THIS MORNING AND SHOULD COME TO AN END IN THE NEXT HOUR OR TWO.
MEANWHILE, SKY CONDITIONS HAVE CLEARED FOR MUCH OF THE SAN
FRANCISCO BAY AREA NORTHWARD WHERE TEMPERATURES COOLED IN THE THE
30S FOR THE COLDER INLAND VALLEY LOCATIONS WITH 40S FOR THE
REMAINDER OF THE REGION. SEASONABLY COOL AND BREEZY CONDITIONS
WILL PERSIST TODAY WITH MOST LOCATIONS WARMING INTO THE 50S. WITH
THIS SAID, THE ONGOING FORECAST REMAINS ON TRACK AND NO UPDATES
ARE ANTICIPATED AT THIS TIME. [DISC]

Previous discussion… as of 3:00am PST Monday. KMUX [Santa Clara/88D CA] continues to show some shower activity from about Santa Cruz southward as the cold upper level trough edges eastward. These residual showers will persist early but decrease during the morning. By this afternoon, dry and cool conditions will settle in. Highs today are expected to be cool and generally in the 50s. 

.PREV DISCUSSION...AS OF 3:00 AM PST MONDAY...KMUX CONTINUES TO
SHOW SOME SHOWER ACTIVITY FROM ABOUT SANTA CRUZ SOUTHWARD AS THE
COLD UPPER LEVEL TROUGH EDGES EASTWARD. THESE RESIDUAL SHOWERS
WILL PERSIST EARLY BUT DECREASE DURING THE MORNING. BY THIS
AFTERNOON, DRY AND COOL CONDITIONS WILL SETTLE IN. HIGHS TODAY ARE
EXPECTED TO BE COOL AND GENERALLY IN THE 50S. [DISC]

As an upper level ridge begins to build over the eastern Pacific, a surface high will build into the Great Basin. This will result in some gusty winds tonight mainly over the North Bay mountains and East Bay hills. Strongest winds are anticipated to be limited to just the higher elevations, thus, a Wind Advisory isn't expected to be needed. This gradient will relax on Tuesday, and high pressure will bring warmer temperatures to the district by Wednesday, when highs are forecast to warm into the 60s. This trend will continue through the week with warmest inland areas likely see highs warming into he 70s. This ridge will remain anchored along the coast through the week keeping dry conditions then through the period. 

AS AN UPPER LEVEL RIDGE BEGINS TO BUILD OVER THE EASTERN PACIFIC,
A SURFACE HIGH WILL BUILD INTO THE GREAT BASIN. THIS WILL RESULT
IN SOME GUSTY WINDS TONIGHT MAINLY OVER THE NORTH BAY MOUNTAINS
AND EAST BAY HILLS. STRONGEST WINDS ARE ANTICIPATED TO BE LIMITED
TO JUST THE HIGHER ELEVATIONS, THUS, A WIND ADVISORY ISN`T
EXPECTED TO BE NEEDED. THIS GRADIENT WILL RELAX ON TUESDAY, AND
HIGH PRESSURE WILL BRING WARMER TEMPERATURES TO THE DISTRICT BY
WEDNESDAY, WHEN HIGHS ARE FORECAST TO WARM INTO THE 60S. THIS
TREND WILL CONTINUE THROUGH THE WEEK WITH WARMEST INLAND AREAS
LIKELY SEE HIGHS WARMING INTO HE 70S. THIS RIDGE WILL REMAIN
ANCHORED ALONG THE COAST THROUGH THE WEEK KEEPING DRY CONDITIONS
THEN THROUGH THE PERIOD. [DISC]

Aviation. As of 09:26am PST Monday… for 18Z [10am PST] TAFs [Terminal Aerodrome Forecasts]. Scattered showers continue to linger around the southern portion of the region this morning. Expect showers to diminish over the next couple of hours. VFR [Visual Flight Rules] conditions through the period with few to scattered clouds today at around 3,000–4,000 feet. Winds will ease throughout the day and tonight turning more N/NE overnight. 

.AVIATION...AS OF 09:26 AM PST MONDAY...FOR 18Z TAFS. SCATTERED
SHOWERS CONTINUE TO LINGER AROUND THE SOUTHERN PORTION OF THE
REGION THIS MORNING. EXPECT SHOWERS TO DIMINISH OVER THE NEXT
COUPLE OF HOURS. VFR CONDITIONS THROUGH THE PERIOD WITH FEW TO SCT
CLOUDS TODAY AT AROUND 3,000 TO 4,000 FEET. WINDS WILL EASE
THROUGHOUT THE DAY AND TONIGHT TURNING MORE N/NE OVERNIGHT. [AVIA]

Vicinity of KSFO [San Francisco CA]VFR [Visual Flight Rules]. Gusty W/NW winds will diminish throughout the day and turn N/NE overnight. Few to scattered clouds today around 4,000 feet. 

VICINITY OF KSFO...VFR. GUSTY W/NW WINDS WILL DIMINISH THROUGHOUT
THE DAY AND TURN N/NE OVERNIGHT. FEW TO SCT CLOUDS TODAY AROUND
4,000 FEET. [AVI2]

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

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

Monterey Bay terminals… showers to linger over the next couple of hours. VFR [Visual Flight Rules] conditions through the period with few to scattered clouds today around 3,000–4,000 feet. Generally light winds through the period. 

MONTEREY BAY TERMINALS...SHOWERS TO LINGER OVER THE NEXT COUPLE OF
HOURS. VFR CONDITIONS THROUGH THE PERIOD WITH FEW TO SCT CLOUDS
TODAY AROUND 3,000 TO 4,000 FEET. GENERALLY LIGHT WINDS THROUGH
THE PERIOD. [AVI2]

Marine. As of 08:50am PST Monday… gusty northwest winds will persist today across the waters. Winds will become more northerly and diminish over the inner waters later tonight and into tomorrow as high pressure builds over the region. Light to moderate northwest swells will continue throughout the week with no storm systems forecast for the next several days. 

.MARINE...AS OF 08:50 AM PST MONDAY...GUSTY NORTHWEST WINDS WILL
PERSIST TODAY ACROSS THE WATERS. WINDS WILL BECOME MORE NORTHERLY
AND DIMINISH OVER THE INNER WATERS  LATER TONIGHT AND INTO
TOMORROW AS HIGH PRESSURE BUILDS OVER THE REGION. LIGHT TO
MODERATE NORTHWEST SWELLS WILL CONTINUE  THROUGHOUT THE WEEK WITH
NO STORM SYSTEMS FORECAST FOR THE NEXT  SEVERAL DAYS. [AVIA]

MTR Watches/Warnings/Advisories

.MTR WATCHES/WARNINGS/ADVISORIES...
.TDAY...COASTAL FLOOD ADVISORY...CAZ006-505-506-508-509-529-530
SCA...PIGEON PT TO PT PINOS 0-10 NM
SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
SCA...PT ARENA TO PIGEON PT 10-60 NM
SCA...PIGEON PT TO PT PIEDRAS BLANCAS 10-60 NM
SCA...PT ARENA TO PT REYES 0-10 NM
SCA...PT REYES TO PIGEON PT 0-10 NM
SCA...MRY BAY UNTIL 3 PM [WARN]

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

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

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Point Forecast

Half Moon Bay CA

21 Jan 1:55pm PST

M.L.King Day Sunny, with a high near 56°. NW wind around 16 mph, with gusts as high as 22 mph.
Tonight Mostly clear, with a low around 42°. NNW wind around 16 mph, with gusts as high as 21 mph.
Tuesday Sunny, with a high near 58°. NNE wind 11 to 16 mph, with gusts as high as 21 mph.
Tuesday Night Mostly clear, with a low around 44°. ENE wind 9 to 14 mph, with gusts as high as 18 mph.
Wednesday Sunny, with a high near 60°. NE wind around 14 mph, with gusts as high as 18 mph.
Wednesday Night Mostly clear, with a low around 45°.
Thursday Sunny, with a high near 60°.
Thursday Night Clear, with a low around 44°.
Friday Sunny, with a high near 63°.
Friday Night Mostly clear, with a low around 47°.
Saturday Sunny, with a high near 64°.
Saturday Night Mostly clear, with a low around 48°.
Sunday Mostly sunny, with a high near 62°.
M.L.King Day
Sunny, with a high near 56. Northwest wind around 16 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 42. North northwest wind around 16 mph, with gusts as high as 21 mph.
Tuesday
Sunny, with a high near 58. North northeast wind 11 to 16 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly clear, with a low around 44. East northeast wind 9 to 14 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 60. Northeast wind around 14 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 60.
Thursday Night
Clear, with a low around 44.
Friday
Sunny, with a high near 63.
Friday Night
Mostly clear, with a low around 47.
Saturday
Sunny, with a high near 64.
Saturday Night
Mostly clear, with a low around 48.
Sunday
Mostly sunny, with a high near 62.

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: