Area Forecast Discussion FXUS66 KMTR [Monterey CA] 270702 AFDMTR ∨ FXUS66 KMTR 270702 AFDMTR [HEAD] National Weather Service San Francisco California 12:02am PDT Sat Apr 27 2024 ∨ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN FRANCISCO CA 1202 AM PDT SAT APR 27 2024 [HEAD] New synopsis, short term, long term. ∨ ...NEW SYNOPSIS, SHORT TERM, LONG TERM... [DISC] Synopsis. Issued at 12:00am PDT Sat April 27 2024 ∨ .SYNOPSIS... ISSUED AT 1200 AM PDT SAT APR 27 2024 [DISC] High pressure brings quiet weather and slowly warming temperatures through next week. Breezy onshore winds will keep temperatures along the coast cooler through the weekend. ∨ HIGH PRESSURE BRINGS QUIET WEATHER AND SLOWLY WARMING TEMPERATURES THROUGH NEXT WEEK. BREEZY ONSHORE WINDS WILL KEEP TEMPERATURES ALONG THE COAST COOLER THROUGH THE WEEKEND. [DISC] Short term. (today and tonight) issued at 12:00am PDT Sat April 27 2024 ∨ .SHORT TERM... (TODAY AND TONIGHT) ISSUED AT 1200 AM PDT SAT APR 27 2024 [DISC] High pressure at the surface and aloft will strengthen offshore as northwest flow prevails aloft across our area. Winds will remain breezy and onshore, keeping temperatures along the coast in the upper 50s to lower 60s this afternoon. Inland areas farther removed from this cool marine influence will see afternoon highs reach the upper 60s to lower 70s. Some coastal cloud cover will linger into the late morning hours but most areas should see the sun by early afternoon. For tonight look for lows in the 40s, except for lower 50s along the immediate coast and within urbanized areas. ∨ HIGH PRESSURE AT THE SURFACE AND ALOFT WILL STRENGTHEN OFFSHORE AS NORTHWEST FLOW PREVAILS ALOFT ACROSS OUR AREA. WINDS WILL REMAIN BREEZY AND ONSHORE, KEEPING TEMPERATURES ALONG THE COAST IN THE UPPER 50S TO LOWER 60S THIS AFTERNOON. INLAND AREAS FARTHER REMOVED FROM THIS COOL MARINE INFLUENCE WILL SEE AFTERNOON HIGHS REACH THE UPPER 60S TO LOWER 70S. SOME COASTAL CLOUD COVER WILL LINGER INTO THE LATE MORNING HOURS BUT MOST AREAS SHOULD SEE THE SUN BY EARLY AFTERNOON. FOR TONIGHT LOOK FOR LOWS IN THE 40S, EXCEPT FOR LOWER 50S ALONG THE IMMEDIATE COAST AND WITHIN URBANIZED AREAS. [DISC] Long term. (Sunday through Friday) issued at 12:00am PDT Sat April 27 2024 ∨ .LONG TERM... (SUNDAY THROUGH FRIDAY) ISSUED AT 1200 AM PDT SAT APR 27 2024 [DISC] A weak upper level ridge will build through the weekend, transitioning into more zonal flow [Large-scale atmospheric flow in which the east-west component is dominant] in the early part of the work week. As a result, a storm system approaching the West Coast will be diverted towards the Pacific Northwest and will dump its rain there. The lack of precipitation and cloud cover will contribute to a warming trend through the next week. High temperatures into the early part of the work week will peak in the low to mid 70s inland and low to mid 60s at the coast. Beyond midweek, the warming continues with inland highs reaching the upper 70s and maybe into the low 80s, while coastal locations see highs into the mid to upper 60s. CPC [Climate Prediction Center] climatic outlooks suggest a lean towards temperatures below seasonal averages, and precipitation above seasonal averages, to begin the first couple weeks of May. For context: for downtown San Francisco, may's average high is 64, and its average seasonal precipitation is 0.70 inches. ∨ A WEAK UPPER LEVEL RIDGE WILL BUILD THROUGH THE WEEKEND, TRANSITIONING INTO MORE ZONAL FLOW IN THE EARLY PART OF THE WORK WEEK. AS A RESULT, A STORM SYSTEM APPROACHING THE WEST COAST WILL BE DIVERTED TOWARDS THE PACIFIC NORTHWEST AND WILL DUMP ITS RAIN THERE. THE LACK OF PRECIPITATION AND CLOUD COVER WILL CONTRIBUTE TO A WARMING TREND THROUGH THE NEXT WEEK. HIGH TEMPERATURES INTO THE EARLY PART OF THE WORK WEEK WILL PEAK IN THE LOW TO MID 70S INLAND AND LOW TO MID 60S AT THE COAST. BEYOND MIDWEEK, THE WARMING CONTINUES WITH INLAND HIGHS REACHING THE UPPER 70S AND MAYBE INTO THE LOW 80S, WHILE COASTAL LOCATIONS SEE HIGHS INTO THE MID TO UPPER 60S. CPC CLIMATIC OUTLOOKS SUGGEST A LEAN TOWARDS TEMPERATURES BELOW SEASONAL AVERAGES, AND PRECIPITATION ABOVE SEASONAL AVERAGES, TO BEGIN THE FIRST COUPLE WEEKS OF MAY. FOR CONTEXT: FOR DOWNTOWN SAN FRANCISCO, MAY`S AVERAGE HIGH IS 64, AND ITS AVERAGE SEASONAL PRECIPITATION IS 0.70 INCHES. [DISC] Aviation. (06Z [11pm PDT] TAFs [Terminal Aerodrome Forecasts]) issued at 10:32pm PDT Friday April 26 2024 ∨ .AVIATION... (06Z TAFS) ISSUED AT 1032 PM PDT FRI APR 26 2024 [AVIA] Some low stratus has developed across the higher elevations, but outside of Monterey Bay, the terminals generally remain VFR [Visual Flight Rules] tonight. Moderate westerly winds continue overnight before turning breezy Saturday afternoon. ∨ SOME LOW STRATUS HAS DEVELOPED ACROSS THE HIGHER ELEVATIONS, BUT OUTSIDE OF MONTEREY BAY, THE TERMINALS GENERALLY REMAIN VFR TONIGHT. MODERATE WESTERLY WINDS CONTINUE OVERNIGHT BEFORE TURNING BREEZY SATURDAY AFTERNOON. [AVI2] Vicinity of SFO [San Francisco CA]… MVFR [Marginal Visual Flight Rules] stratus has developed on the western half of the San Mateo peninsula, but moderate west-northwest winds at the terminal overnight should keep ceiling formation at bay. Winds should pick up on Saturday afternoon with gusts up to 20 knots [23 mph]. Some model output suggesting MVFR [Marginal Visual Flight Rules] ceilings developing late Saturday night, but confidence is currently low. ∨ VICINITY OF SFO... MVFR STRATUS HAS DEVELOPED ON THE WESTERN HALF OF THE SAN MATEO PENINSULA, BUT MODERATE WEST-NORTHWEST WINDS AT THE TERMINAL OVERNIGHT SHOULD KEEP CEILING FORMATION AT BAY. WINDS SHOULD PICK UP ON SATURDAY AFTERNOON WITH GUSTS UP TO 20 KNOTS. SOME MODEL OUTPUT SUGGESTING MVFR CEILINGS DEVELOPING LATE SATURDAY NIGHT, BUT CONFIDENCE IS CURRENTLY LOW. [AVI2] SFO [San Francisco CA] bridge approach… similar to SFO [San Francisco CA]. ∨ SFO BRIDGE APPROACH... SIMILAR TO SFO. [AVI2] Monterey Bay terminals… MVFR [Marginal Visual Flight Rules] ceilings spilling over from the nearby mountains overnight, with moderate onshore winds. Winds pick up late Saturday morning as the stratus clears, with gusts up to 20 knot [23 mph], before winds diminish and stratus returns in the evening. ∨ MONTEREY BAY TERMINALS... MVFR CEILINGS SPILLING OVER FROM THE NEARBY MOUNTAINS OVERNIGHT, WITH MODERATE ONSHORE WINDS. WINDS PICK UP LATE SATURDAY MORNING AS THE STRATUS CLEARS, WITH GUSTS UP TO 20 KNOT, BEFORE WINDS DIMINISH AND STRATUS RETURNS IN THE EVENING. [AVI2] Marine. (tonight through next Thursday) issued at 10:32pm PDT Friday April 26 2024 ∨ .MARINE... (TONIGHT THROUGH NEXT THURSDAY) ISSUED AT 1032 PM PDT FRI APR 26 2024 [AVIA] Strong northwesterly winds with gale force gusts are to be expected through the weekend, particularly over the coastal waters, creating hazardous conditions for small craft vessels. Moderate period northwesterly swell will continue to move through the waters through Wednesday. ∨ STRONG NORTHWESTERLY WINDS WITH GALE FORCE GUSTS ARE TO BE EXPECTED THROUGH THE WEEKEND, PARTICULARLY OVER THE COASTAL WATERS, CREATING HAZARDOUS CONDITIONS FOR SMALL CRAFT VESSELS. MODERATE PERIOD NORTHWESTERLY SWELL WILL CONTINUE TO MOVE THROUGH THE WATERS THROUGH WEDNESDAY. [AVI2] MTR Watches/Warnings/Advisories
.MTR WATCHES/WARNINGS/ADVISORIES... CA...NONE. PZ...SMALL CRAFT ADVISORY UNTIL 3 AM PDT EARLY THIS MORNING FOR MRY BAY-SF BAY N OF BAY BRIDGE. [WARN]
SMALL CRAFT ADVISORY FROM 3 PM THIS AFTERNOON TO 9 PM PDT THIS EVENING FOR MRY BAY-SF BAY N OF BAY BRIDGE. [WRN2]
SMALL CRAFT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR PIGEON PT TO PT PINOS 0-10 NM-PIGEON PT TO PT PINOS 10-60 NM-PT ARENA TO PT REYES 0-10 NM-PT ARENA TO PT REYES 10-60 NM-PT REYES TO PIGEON PT 0-10 NM. [WRN2]
GALE WARNING UNTIL 3 AM PDT EARLY THIS MORNING FOR PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM. [WRN2]
SHORT TERM...SPM LONG TERM....DIALH AVIATION...DIALH MARINE...SO [WRN2] 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 Half Moon Bay CA 27 Apr 02:55am PDT Today Sunny, then becoming mostly cloudy during the afternoon, with a high near 58°. WNW wind 9 to 17 mph, with gusts as high as 25 mph. Tonight Increasing clouds, with a low around 48°. NW wind 13 to 18 mph, with gusts as high as 28 mph. Sunday Mostly sunny, with a high near 61°. WNW wind 11 to 18 mph, with gusts as high as 29 mph. Sunday Night Mostly clear, with a low around 45°. WNW wind 17 to 20 mph, with gusts as high as 30 mph. Monday Sunny, with a high near 61°. Breezy, with a NW wind 18 to 22 mph, with gusts as high as 33 mph. Monday Night Mostly clear, with a low around 44°. Breezy. Tuesday Sunny, with a high near 62°. Tuesday Night Mostly clear, with a low around 45°. Breezy. Wednesday Sunny, with a high near 64°. Wednesday Night Partly cloudy, with a low around 46°. Thursday Mostly sunny, with a high near 63°. Thursday Night Mostly clear, with a low around 46°. Friday Mostly sunny, with a high near 64°. Today Sunny, then becoming mostly cloudy during the afternoon, with a high near 58. West northwest wind 9 to 17 mph, with gusts as high as 25 mph. Tonight Increasing clouds, with a low around 48. Northwest wind 13 to 18 mph, with gusts as high as 28 mph. Sunday Mostly sunny, with a high near 61. West northwest wind 11 to 18 mph, with gusts as high as 29 mph. Sunday Night Mostly clear, with a low around 45. West northwest wind 17 to 20 mph, with gusts as high as 30 mph. Monday Sunny, with a high near 61. Breezy, with a northwest wind 18 to 22 mph, with gusts as high as 33 mph. Monday Night Mostly clear, with a low around 44. Breezy. Tuesday Sunny, with a high near 62. Tuesday Night Mostly clear, with a low around 45. Breezy. Wednesday Sunny, with a high near 64. Wednesday Night Partly cloudy, with a low around 46. Thursday Mostly sunny, with a high near 63. Thursday Night Mostly clear, with a low around 46. Friday Mostly sunny, with a high near 64. |
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