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FXUS66 KMTR [Monterey CA] 101142 AFDMTR ∨

FXUS66 KMTR 101142
AFDMTR [HEAD]

National Weather Service San Francisco California 4:42am PDT Fri Apr 10 2026 ∨

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
442 AM PDT FRI APR 10 2026 [HEAD]

New aviation, marine. ∨

...NEW AVIATION, MARINE... [DISC]

Key Messages… updated at 12:03am PDT Friday April 10 2026 ∨

.KEY MESSAGES...
UPDATED AT 1203 AM PDT FRI APR 10 2026 [DISC]

- rain and thunderstorms through the weekend ∨

 - RAIN AND THUNDERSTORMS THROUGH THE WEEKEND [DISC]

- gradual warming and drying trend next week ∨

 - GRADUAL WARMING AND DRYING TREND NEXT WEEK [DISC]

Short term. Issued at 12:03am PDT Friday April 10 2026 (today and tonight) ∨

.SHORT TERM...
ISSUED AT 1203 AM PDT FRI APR 10 2026
(TODAY AND TONIGHT) [DISC]

A surface low near 37°N [30 mi south of Half Moon Bay], –128°W [310 mi west of Half Moon Bay] in the eastern Pacific Ocean will continue to trek eastward through the night. Rain showers from the main rain band will push into the area around 2–3 am and push off to the northeast by the afternoon. Isolated rain showers/thunderstorms will remain possible behind it. Rainfall totals will be dependent upon where rain showers/thunderstorms develop and thunderstorm development will be dependent upon where breaks in the clouds allow for the convective temperature to be realized. Rainfall is expected to be strictly beneficial. The only caveat would be for minor flooding in poor drainage and urban areas if a heavier rain shower/thunderstorm develops and/or rain showers/thunderstorms train. Thunderstorms will pose the risks of lightning, locally heavy rainfall, erratic/gusty winds, and small hail. Weak low-level shear does not support a mention of rotation leading to tornadoes and/or waterspouts. ∨

A SURFACE LOW NEAR 37 N, -128 W IN THE EASTERN PACIFIC OCEAN WILL
CONTINUE TO TREK EASTWARD THROUGH THE NIGHT. RAIN SHOWERS FROM THE
MAIN RAIN BAND WILL PUSH INTO THE AREA AROUND 2-3 AM AND PUSH OFF TO
THE NORTHEAST BY THE AFTERNOON. ISOLATED RAIN SHOWERS/THUNDERSTORMS
WILL REMAIN POSSIBLE BEHIND IT. RAINFALL TOTALS WILL BE DEPENDENT
UPON WHERE RAIN SHOWERS/THUNDERSTORMS DEVELOP AND THUNDERSTORM
DEVELOPMENT WILL BE DEPENDENT UPON WHERE BREAKS IN THE CLOUDS
ALLOW FOR THE CONVECTIVE TEMPERATURE TO BE REALIZED. RAINFALL IS
EXPECTED TO BE STRICTLY BENEFICIAL. THE ONLY CAVEAT WOULD BE FOR
MINOR FLOODING IN POOR DRAINAGE AND URBAN AREAS IF A HEAVIER RAIN
SHOWER/THUNDERSTORM DEVELOPS AND/OR RAIN SHOWERS/THUNDERSTORMS
TRAIN. THUNDERSTORMS WILL POSE THE RISKS OF LIGHTNING, LOCALLY
HEAVY RAINFALL, ERRATIC/GUSTY WINDS, AND SMALL HAIL. WEAK LOW-
LEVEL SHEAR DOES NOT SUPPORT A MENTION OF ROTATION LEADING TO
TORNADOES AND/OR WATERSPOUTS. [DISC]

Long term. Issued at 12:03am PDT Friday April 10 2026 (Saturday through Thursday) ∨

.LONG TERM...
ISSUED AT 1203 AM PDT FRI APR 10 2026
(SATURDAY THROUGH THURSDAY) [DISC]

An upper-level low in the Gulf of Alaska will dig down the West Coast and absorb the first low as it does so on Saturday. This will be a whole new ballgame as this system is much more dynamic by nature with the inclusion of the jet stream. The cold front will sweep through Saturday afternoon and evening bringing widespread rainfall to the region. Even with the QPF [Quantitative Precipitation Forecast] continuing to trend higher with 1"-2" and up to 4" in the coastal ranges when all is said and done, this rainfall is expected to be purely beneficial thanks (I guess) to the dry March that we are coming off of. The three ingredients for thunderstorms of lift, instability, and moisture will all be in place Saturday. The merging of the two lows and the associated cold front will offer lift, the atmosphere will destabilize as cold air filters in aloft, and remnant tropical moisture will remain in place through the cold frontal passage. Thunderstorms will pose the risks of lightning, locally heavy rainfall, erratic/gusty winds, and small hail. With the reintroduction of the jet stream and veering winds in the low-levels, rotation yielding waterspouts and/or weak tornadoes is possible. The slower trend of returning to ridging is thanks to the low filling instead of remaining progressive Sunday. As a result, wraparound rain showers and thunderstorms are now in the forecast all of Sunday. Cold air with remnant moisture will allow for snow across the highest peaks on Sunday. Anglers should take special note of the expected weather and have a plan to reach safe harbor quickly when the weather turns. Even without thunderstorms, the marine conditions will deteriorate through the day Saturday. If thunderstorms develop, the associated wind gusts are capable of capsizing small vessels. Fishing leads to more lightning deaths in the US than any other activity. When thunder roars, head indoors! ∨

AN UPPER-LEVEL LOW IN THE GULF OF ALASKA WILL DIG DOWN THE WEST
COAST AND ABSORB THE FIRST LOW AS IT DOES SO ON SATURDAY. THIS WILL
BE A WHOLE NEW BALLGAME AS THIS SYSTEM IS MUCH MORE DYNAMIC BY
NATURE WITH THE INCLUSION OF THE JET STREAM. THE COLD FRONT WILL
SWEEP THROUGH SATURDAY AFTERNOON AND EVENING BRINGING WIDESPREAD
RAINFALL TO THE REGION. EVEN WITH THE QPF CONTINUING TO TREND HIGHER
WITH 1"-2" AND UP TO 4" IN THE COASTAL RANGES WHEN ALL IS SAID AND
DONE, THIS RAINFALL IS EXPECTED TO BE PURELY BENEFICIAL THANKS (I
GUESS) TO THE DRY MARCH THAT WE ARE COMING OFF OF. THE THREE
INGREDIENTS FOR THUNDERSTORMS OF LIFT, INSTABILITY, AND MOISTURE
WILL ALL BE IN PLACE SATURDAY. THE MERGING OF THE TWO LOWS AND THE
ASSOCIATED COLD FRONT WILL OFFER LIFT, THE ATMOSPHERE WILL
DESTABILIZE AS COLD AIR FILTERS IN ALOFT, AND REMNANT TROPICAL
MOISTURE WILL REMAIN IN PLACE THROUGH THE COLD FRONTAL PASSAGE.
THUNDERSTORMS WILL POSE THE RISKS OF LIGHTNING, LOCALLY HEAVY
RAINFALL, ERRATIC/GUSTY WINDS, AND SMALL HAIL. WITH THE
REINTRODUCTION OF THE JET STREAM AND VEERING WINDS IN THE LOW-
LEVELS, ROTATION YIELDING WATERSPOUTS AND/OR WEAK TORNADOES IS
POSSIBLE. THE SLOWER TREND OF RETURNING TO RIDGING IS THANKS TO THE
LOW FILLING INSTEAD OF REMAINING PROGRESSIVE SUNDAY. AS A RESULT,
WRAPAROUND RAIN SHOWERS AND THUNDERSTORMS ARE NOW IN THE FORECAST
ALL OF SUNDAY. COLD AIR WITH REMNANT MOISTURE WILL ALLOW FOR SNOW
ACROSS THE HIGHEST PEAKS ON SUNDAY. ANGLERS SHOULD TAKE SPECIAL NOTE
OF THE EXPECTED WEATHER AND HAVE A PLAN TO REACH SAFE HARBOR QUICKLY
WHEN THE WEATHER TURNS. EVEN WITHOUT THUNDERSTORMS, THE MARINE
CONDITIONS WILL DETERIORATE THROUGH THE DAY SATURDAY. IF
THUNDERSTORMS DEVELOP, THE ASSOCIATED WIND GUSTS ARE CAPABLE OF
CAPSIZING SMALL VESSELS. FISHING LEADS TO MORE LIGHTNING DEATHS IN
THE U.S. THAN ANY OTHER ACTIVITY. WHEN THUNDER ROARS, HEAD INDOORS! [DISC]

Heights will slowly begin to rise on Monday, kicking off a warming and drying trend. Widespread below normal temperatures are expected Monday before slowly rebounding to seasonal normals by Thursday. As we get back into the growing season, patchy frost is possible in sheltered locations Monday morning due to the combination of cold conditions and remnant moisture. The frost risk decreases through the week as temperatures slowly rise and drier air filters in. ∨

HEIGHTS WILL SLOWLY BEGIN TO RISE ON MONDAY, KICKING OFF A WARMING
AND DRYING TREND. WIDESPREAD BELOW NORMAL TEMPERATURES ARE EXPECTED
MONDAY BEFORE SLOWLY REBOUNDING TO SEASONAL NORMALS BY THURSDAY. AS
WE GET BACK INTO THE GROWING SEASON, PATCHY FROST IS POSSIBLE IN
SHELTERED LOCATIONS MONDAY MORNING DUE TO THE COMBINATION OF COLD
CONDITIONS AND REMNANT MOISTURE. THE FROST RISK DECREASES THROUGH
THE WEEK AS TEMPERATURES SLOWLY RISE AND DRIER AIR FILTERS IN. [DISC]

Aviation. (12Z [5am PDT] TAFs [Terminal Aerodrome Forecasts]) issued at 4:42am PDT Friday April 10 2026 ∨

.AVIATION...
(12Z TAFS)
ISSUED AT 442 AM PDT FRI APR 10 2026 [AVIA]

A band of moderate to heavy showers is moving slowly eastward over the forecast area. In addition to showers during the 12Z [5am PDT] TAFs [Terminal Aerodrome Forecasts], there's a slight chance to chance of thunderstorms today. Conditions are otherwise forecast VFR [Visual Flight Rules]-MVFR [Marginal Visual Flight Rules]. ∨

A BAND OF MODERATE TO HEAVY SHOWERS IS MOVING SLOWLY EASTWARD
OVER THE FORECAST AREA. IN ADDITION TO SHOWERS DURING THE 12Z
TAFS, THERE`S A SLIGHT CHANCE TO CHANCE OF THUNDERSTORMS TODAY.
CONDITIONS ARE OTHERWISE FORECAST VFR-MVFR. [AVI2]

Vicinity of SFO [San Francisco CA]… VFR [Visual Flight Rules]-MVFR [Marginal Visual Flight Rules]. Showers with a convective potential today, but will monitor radar and satellite before adding VCTS [Thunderstorms in the Vicinity] to the TAF [Terminal Aerodrome Forecast]. Southeast wind 5–10 knots [6–12 mph] becoming south-southwest 10–15 knots [12–17 mph] in the afternoon ∨

VICINITY OF SFO...VFR-MVFR. SHOWERS WITH A CONVECTIVE POTENTIAL
TODAY, BUT WILL MONITOR RADAR AND SATELLITE BEFORE ADDING VCTS TO
THE TAF. SOUTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTH-SOUTHWEST 10
TO 15 KNOTS IN THE AFTERNOON [AVI2]

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

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

Monterey Bay terminals… VFR [Visual Flight Rules]-MVFR [Marginal Visual Flight Rules]. Showers. Southeast to southwest winds 5–12 knots [6–14 mph]. ∨

MONTEREY BAY TERMINALS...VFR-MVFR. SHOWERS. SOUTHEAST TO SOUTHWEST
WINDS 5 TO 12 KNOTS. [AVI2]

Marine. (today through Wednesday) issued at 4:35am PDT Friday April 10 2026 ∨

.MARINE...
(TODAY THROUGH WEDNESDAY)
ISSUED AT 435 AM PDT FRI APR 10 2026 [AVIA]

A low pressure system with showers and a chance of thunderstorms will move eastward over the coastal waters and bays today. This low will merge with an energetic low from Alaska Saturday and Sunday. The result will be rain, heavy at times, including a chance of thunderstorms Saturday through Sunday. High pressure builds behind the system with fresh northwest winds developing early next week. ∨

A LOW PRESSURE SYSTEM WITH SHOWERS AND A CHANCE OF THUNDERSTORMS
WILL MOVE EASTWARD OVER THE COASTAL WATERS AND BAYS TODAY. THIS
LOW WILL MERGE WITH AN ENERGETIC LOW FROM ALASKA SATURDAY AND
SUNDAY. THE RESULT WILL BE RAIN, HEAVY AT TIMES, INCLUDING A
CHANCE OF THUNDERSTORMS SATURDAY THROUGH SUNDAY. HIGH PRESSURE
BUILDS BEHIND THE SYSTEM WITH FRESH NORTHWEST WINDS DEVELOPING
EARLY NEXT WEEK. [AVI2]

MTR Watches/Warnings/Advisories

California: none.
Pacific Ocean: Small Craft Advisory from 9am to 9pm PDT Saturday for Monterey Bay-Pigeon Pt [Pescadero CA] to Pt Pinos [Monterey CA] 0–10 nm [11 miles]-Pt Pinos [Monterey CA] to Pt Piedras Blancas [San Simeon CA] 0–10 nm [11 miles]-Pt Reyes [San Francisco CA] to Pigeon Pt [Pescadero CA] 0–10 nm [11 miles]-SF Bay N of Bay Bridge. ∨

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...SMALL CRAFT ADVISORY FROM 9 AM TO 9 PM PDT SATURDAY FOR MRY BAY-
PIGEON PT TO PT PINOS 0-10 NM-PT PINOS TO PT PIEDRAS
BLANCAS 0-10 NM-PT REYES TO PIGEON PT 0-10 NM-SF BAY N OF
BAY BRIDGE. [WARN]

Small Craft Advisory from 9am to 3pm PDT Saturday for Pt Arena [Mendocino CA] to Pt Reyes [San Francisco CA] 0–10 nm [11 miles]. ∨

     SMALL CRAFT ADVISORY FROM 9 AM TO 3 PM PDT SATURDAY FOR PT ARENA
TO PT REYES 0-10 NM. [WRN2]

Small Craft Advisory from 3pm to 9pm PDT Saturday for Pigeon Pt [Pescadero CA] to Pt Pinos [Monterey CA] 10–60 nm [69 miles]. ∨

     SMALL CRAFT ADVISORY FROM 3 PM TO 9 PM PDT SATURDAY FOR PIGEON
PT TO PT PINOS 10-60 NM. [WRN2]

Short term…sarment long term…sarment aviation…Canepa marine…Canepa ∨

SHORT TERM...SARMENT
LONG TERM....SARMENT
AVIATION...CANEPA
MARINE...CANEPA [WRN2]

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WWW.YOUTUBE.COM/NWSBAYAREA [DISC]

Weather NWS glossary About NWS point forecasts Hourly Weather Graph Long-range forecast Radar Satellite Max Temps Graphical Forecast	Area Forecast Discussion FXUS66 KMTR [Monterey CA] 101142 AFDMTR ∨ FXUS66 KMTR 101142 AFDMTR [HEAD] National Weather Service San Francisco California 4:42am PDT Fri Apr 10 2026 ∨ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN FRANCISCO CA 442 AM PDT FRI APR 10 2026 [HEAD] New aviation, marine. ∨ ...NEW AVIATION, MARINE... [DISC] Key Messages… updated at 12:03am PDT Friday April 10 2026 ∨ .KEY MESSAGES... UPDATED AT 1203 AM PDT FRI APR 10 2026 [DISC] - rain and thunderstorms through the weekend ∨ - RAIN AND THUNDERSTORMS THROUGH THE WEEKEND [DISC] - gradual warming and drying trend next week ∨ - GRADUAL WARMING AND DRYING TREND NEXT WEEK [DISC] Short term. Issued at 12:03am PDT Friday April 10 2026 (today and tonight) ∨ .SHORT TERM... ISSUED AT 1203 AM PDT FRI APR 10 2026 (TODAY AND TONIGHT) [DISC] A surface low near 37°N [30 mi south of Half Moon Bay], –128°W [310 mi west of Half Moon Bay] in the eastern Pacific Ocean will continue to trek eastward through the night. Rain showers from the main rain band will push into the area around 2–3 am and push off to the northeast by the afternoon. Isolated rain showers/thunderstorms will remain possible behind it. Rainfall totals will be dependent upon where rain showers/thunderstorms develop and thunderstorm development will be dependent upon where breaks in the clouds allow for the convective temperature to be realized. Rainfall is expected to be strictly beneficial. The only caveat would be for minor flooding in poor drainage and urban areas if a heavier rain shower/thunderstorm develops and/or rain showers/thunderstorms train. Thunderstorms will pose the risks of lightning, locally heavy rainfall, erratic/gusty winds, and small hail. Weak low-level shear does not support a mention of rotation leading to tornadoes and/or waterspouts. ∨ A SURFACE LOW NEAR 37 N, -128 W IN THE EASTERN PACIFIC OCEAN WILL CONTINUE TO TREK EASTWARD THROUGH THE NIGHT. RAIN SHOWERS FROM THE MAIN RAIN BAND WILL PUSH INTO THE AREA AROUND 2-3 AM AND PUSH OFF TO THE NORTHEAST BY THE AFTERNOON. ISOLATED RAIN SHOWERS/THUNDERSTORMS WILL REMAIN POSSIBLE BEHIND IT. RAINFALL TOTALS WILL BE DEPENDENT UPON WHERE RAIN SHOWERS/THUNDERSTORMS DEVELOP AND THUNDERSTORM DEVELOPMENT WILL BE DEPENDENT UPON WHERE BREAKS IN THE CLOUDS ALLOW FOR THE CONVECTIVE TEMPERATURE TO BE REALIZED. RAINFALL IS EXPECTED TO BE STRICTLY BENEFICIAL. THE ONLY CAVEAT WOULD BE FOR MINOR FLOODING IN POOR DRAINAGE AND URBAN AREAS IF A HEAVIER RAIN SHOWER/THUNDERSTORM DEVELOPS AND/OR RAIN SHOWERS/THUNDERSTORMS TRAIN. THUNDERSTORMS WILL POSE THE RISKS OF LIGHTNING, LOCALLY HEAVY RAINFALL, ERRATIC/GUSTY WINDS, AND SMALL HAIL. WEAK LOW- LEVEL SHEAR DOES NOT SUPPORT A MENTION OF ROTATION LEADING TO TORNADOES AND/OR WATERSPOUTS. [DISC] Long term. Issued at 12:03am PDT Friday April 10 2026 (Saturday through Thursday) ∨ .LONG TERM... ISSUED AT 1203 AM PDT FRI APR 10 2026 (SATURDAY THROUGH THURSDAY) [DISC] An upper-level low in the Gulf of Alaska will dig down the West Coast and absorb the first low as it does so on Saturday. This will be a whole new ballgame as this system is much more dynamic by nature with the inclusion of the jet stream. The cold front will sweep through Saturday afternoon and evening bringing widespread rainfall to the region. Even with the QPF [Quantitative Precipitation Forecast] continuing to trend higher with 1"-2" and up to 4" in the coastal ranges when all is said and done, this rainfall is expected to be purely beneficial thanks (I guess) to the dry March that we are coming off of. The three ingredients for thunderstorms of lift, instability, and moisture will all be in place Saturday. The merging of the two lows and the associated cold front will offer lift, the atmosphere will destabilize as cold air filters in aloft, and remnant tropical moisture will remain in place through the cold frontal passage. Thunderstorms will pose the risks of lightning, locally heavy rainfall, erratic/gusty winds, and small hail. With the reintroduction of the jet stream and veering winds in the low-levels, rotation yielding waterspouts and/or weak tornadoes is possible. The slower trend of returning to ridging is thanks to the low filling instead of remaining progressive Sunday. As a result, wraparound rain showers and thunderstorms are now in the forecast all of Sunday. Cold air with remnant moisture will allow for snow across the highest peaks on Sunday. Anglers should take special note of the expected weather and have a plan to reach safe harbor quickly when the weather turns. Even without thunderstorms, the marine conditions will deteriorate through the day Saturday. If thunderstorms develop, the associated wind gusts are capable of capsizing small vessels. Fishing leads to more lightning deaths in the US than any other activity. When thunder roars, head indoors! ∨ AN UPPER-LEVEL LOW IN THE GULF OF ALASKA WILL DIG DOWN THE WEST COAST AND ABSORB THE FIRST LOW AS IT DOES SO ON SATURDAY. THIS WILL BE A WHOLE NEW BALLGAME AS THIS SYSTEM IS MUCH MORE DYNAMIC BY NATURE WITH THE INCLUSION OF THE JET STREAM. THE COLD FRONT WILL SWEEP THROUGH SATURDAY AFTERNOON AND EVENING BRINGING WIDESPREAD RAINFALL TO THE REGION. EVEN WITH THE QPF CONTINUING TO TREND HIGHER WITH 1"-2" AND UP TO 4" IN THE COASTAL RANGES WHEN ALL IS SAID AND DONE, THIS RAINFALL IS EXPECTED TO BE PURELY BENEFICIAL THANKS (I GUESS) TO THE DRY MARCH THAT WE ARE COMING OFF OF. THE THREE INGREDIENTS FOR THUNDERSTORMS OF LIFT, INSTABILITY, AND MOISTURE WILL ALL BE IN PLACE SATURDAY. THE MERGING OF THE TWO LOWS AND THE ASSOCIATED COLD FRONT WILL OFFER LIFT, THE ATMOSPHERE WILL DESTABILIZE AS COLD AIR FILTERS IN ALOFT, AND REMNANT TROPICAL MOISTURE WILL REMAIN IN PLACE THROUGH THE COLD FRONTAL PASSAGE. THUNDERSTORMS WILL POSE THE RISKS OF LIGHTNING, LOCALLY HEAVY RAINFALL, ERRATIC/GUSTY WINDS, AND SMALL HAIL. WITH THE REINTRODUCTION OF THE JET STREAM AND VEERING WINDS IN THE LOW- LEVELS, ROTATION YIELDING WATERSPOUTS AND/OR WEAK TORNADOES IS POSSIBLE. THE SLOWER TREND OF RETURNING TO RIDGING IS THANKS TO THE LOW FILLING INSTEAD OF REMAINING PROGRESSIVE SUNDAY. AS A RESULT, WRAPAROUND RAIN SHOWERS AND THUNDERSTORMS ARE NOW IN THE FORECAST ALL OF SUNDAY. COLD AIR WITH REMNANT MOISTURE WILL ALLOW FOR SNOW ACROSS THE HIGHEST PEAKS ON SUNDAY. ANGLERS SHOULD TAKE SPECIAL NOTE OF THE EXPECTED WEATHER AND HAVE A PLAN TO REACH SAFE HARBOR QUICKLY WHEN THE WEATHER TURNS. EVEN WITHOUT THUNDERSTORMS, THE MARINE CONDITIONS WILL DETERIORATE THROUGH THE DAY SATURDAY. IF THUNDERSTORMS DEVELOP, THE ASSOCIATED WIND GUSTS ARE CAPABLE OF CAPSIZING SMALL VESSELS. FISHING LEADS TO MORE LIGHTNING DEATHS IN THE U.S. THAN ANY OTHER ACTIVITY. WHEN THUNDER ROARS, HEAD INDOORS! [DISC] Heights will slowly begin to rise on Monday, kicking off a warming and drying trend. Widespread below normal temperatures are expected Monday before slowly rebounding to seasonal normals by Thursday. As we get back into the growing season, patchy frost is possible in sheltered locations Monday morning due to the combination of cold conditions and remnant moisture. The frost risk decreases through the week as temperatures slowly rise and drier air filters in. ∨ HEIGHTS WILL SLOWLY BEGIN TO RISE ON MONDAY, KICKING OFF A WARMING AND DRYING TREND. WIDESPREAD BELOW NORMAL TEMPERATURES ARE EXPECTED MONDAY BEFORE SLOWLY REBOUNDING TO SEASONAL NORMALS BY THURSDAY. AS WE GET BACK INTO THE GROWING SEASON, PATCHY FROST IS POSSIBLE IN SHELTERED LOCATIONS MONDAY MORNING DUE TO THE COMBINATION OF COLD CONDITIONS AND REMNANT MOISTURE. THE FROST RISK DECREASES THROUGH THE WEEK AS TEMPERATURES SLOWLY RISE AND DRIER AIR FILTERS IN. [DISC] Aviation. (12Z [5am PDT] TAFs [Terminal Aerodrome Forecasts]) issued at 4:42am PDT Friday April 10 2026 ∨ .AVIATION... (12Z TAFS) ISSUED AT 442 AM PDT FRI APR 10 2026 [AVIA] A band of moderate to heavy showers is moving slowly eastward over the forecast area. In addition to showers during the 12Z [5am PDT] TAFs [Terminal Aerodrome Forecasts], there's a slight chance to chance of thunderstorms today. Conditions are otherwise forecast VFR [Visual Flight Rules]-MVFR [Marginal Visual Flight Rules]. ∨ A BAND OF MODERATE TO HEAVY SHOWERS IS MOVING SLOWLY EASTWARD OVER THE FORECAST AREA. IN ADDITION TO SHOWERS DURING THE 12Z TAFS, THERE`S A SLIGHT CHANCE TO CHANCE OF THUNDERSTORMS TODAY. CONDITIONS ARE OTHERWISE FORECAST VFR-MVFR. [AVI2] Vicinity of SFO [San Francisco CA]… VFR [Visual Flight Rules]-MVFR [Marginal Visual Flight Rules]. Showers with a convective potential today, but will monitor radar and satellite before adding VCTS [Thunderstorms in the Vicinity] to the TAF [Terminal Aerodrome Forecast]. Southeast wind 5–10 knots [6–12 mph] becoming south-southwest 10–15 knots [12–17 mph] in the afternoon ∨ VICINITY OF SFO...VFR-MVFR. SHOWERS WITH A CONVECTIVE POTENTIAL TODAY, BUT WILL MONITOR RADAR AND SATELLITE BEFORE ADDING VCTS TO THE TAF. SOUTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTH-SOUTHWEST 10 TO 15 KNOTS IN THE AFTERNOON [AVI2] SFO [San Francisco CA] bridge approach… similar to SFO [San Francisco CA]. ∨ SFO BRIDGE APPROACH...SIMILAR TO SFO. [AVI2] Monterey Bay terminals… VFR [Visual Flight Rules]-MVFR [Marginal Visual Flight Rules]. Showers. Southeast to southwest winds 5–12 knots [6–14 mph]. ∨ MONTEREY BAY TERMINALS...VFR-MVFR. SHOWERS. SOUTHEAST TO SOUTHWEST WINDS 5 TO 12 KNOTS. [AVI2] Marine. (today through Wednesday) issued at 4:35am PDT Friday April 10 2026 ∨ .MARINE... (TODAY THROUGH WEDNESDAY) ISSUED AT 435 AM PDT FRI APR 10 2026 [AVIA] A low pressure system with showers and a chance of thunderstorms will move eastward over the coastal waters and bays today. This low will merge with an energetic low from Alaska Saturday and Sunday. The result will be rain, heavy at times, including a chance of thunderstorms Saturday through Sunday. High pressure builds behind the system with fresh northwest winds developing early next week. ∨ A LOW PRESSURE SYSTEM WITH SHOWERS AND A CHANCE OF THUNDERSTORMS WILL MOVE EASTWARD OVER THE COASTAL WATERS AND BAYS TODAY. THIS LOW WILL MERGE WITH AN ENERGETIC LOW FROM ALASKA SATURDAY AND SUNDAY. THE RESULT WILL BE RAIN, HEAVY AT TIMES, INCLUDING A CHANCE OF THUNDERSTORMS SATURDAY THROUGH SUNDAY. HIGH PRESSURE BUILDS BEHIND THE SYSTEM WITH FRESH NORTHWEST WINDS DEVELOPING EARLY NEXT WEEK. [AVI2] MTR Watches/Warnings/Advisories California: none. Pacific Ocean: Small Craft Advisory from 9am to 9pm PDT Saturday for Monterey Bay-Pigeon Pt [Pescadero CA] to Pt Pinos [Monterey CA] 0–10 nm [11 miles]-Pt Pinos [Monterey CA] to Pt Piedras Blancas [San Simeon CA] 0–10 nm [11 miles]-Pt Reyes [San Francisco CA] to Pigeon Pt [Pescadero CA] 0–10 nm [11 miles]-SF Bay N of Bay Bridge. ∨ .MTR WATCHES/WARNINGS/ADVISORIES... CA...NONE. PZ...SMALL CRAFT ADVISORY FROM 9 AM TO 9 PM PDT SATURDAY FOR MRY BAY- PIGEON PT TO PT PINOS 0-10 NM-PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM-PT REYES TO PIGEON PT 0-10 NM-SF BAY N OF BAY BRIDGE. [WARN] Small Craft Advisory from 9am to 3pm PDT Saturday for Pt Arena [Mendocino CA] to Pt Reyes [San Francisco CA] 0–10 nm [11 miles]. ∨ SMALL CRAFT ADVISORY FROM 9 AM TO 3 PM PDT SATURDAY FOR PT ARENA TO PT REYES 0-10 NM. [WRN2] Small Craft Advisory from 3pm to 9pm PDT Saturday for Pigeon Pt [Pescadero CA] to Pt Pinos [Monterey CA] 10–60 nm [69 miles]. ∨ SMALL CRAFT ADVISORY FROM 3 PM TO 9 PM PDT SATURDAY FOR PIGEON PT TO PT PINOS 10-60 NM. [WRN2] Short term…sarment long term…sarment aviation…Canepa marine…Canepa ∨ SHORT TERM...SARMENT LONG TERM....SARMENT AVIATION...CANEPA MARINE...CANEPA [WRN2] VISIT US AT WWW.WEATHER.GOV/SANFRANCISCO [LINK] Follow us on Facebook, x, and YouTube at: www.facebook.com/nwsbayarea x.com/nwsbayarea www.youtube.com/nwsbayarea ∨ FOLLOW US ON FACEBOOK, X, AND YOUTUBE AT: WWW.FACEBOOK.COM/NWSBAYAREA X.COM/NWSBAYAREA WWW.YOUTUBE.COM/NWSBAYAREA [DISC]	Point Forecast Half Moon Bay CA 10 Apr 08:55am PDT Today Showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. High near 62°. South wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. Tonight Rain and thunderstorms likely. Mostly cloudy, with a low around 50°. SSW wind 7 to 9 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. Saturday Rain, mainly before 2pm, then showers and possibly a thunderstorm after 2pm. High near 62°. South wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible. Saturday Night Showers and possibly a thunderstorm. Low around 47°. SSW wind 11 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible. Sunday Showers and possibly a thunderstorm. High near 60°. SW wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible. Sunday Night A 40% chance of rain, mainly before 11pm. Mostly cloudy, with a low around 46°. New precipitation amounts of less than a tenth of an inch possible. Monday Mostly sunny, with a high near 62°. Monday Night Mostly clear, with a low around 48°. Tuesday Mostly sunny, with a high near 62°. Tuesday Night Mostly clear, with a low around 47°. Wednesday Mostly sunny, with a high near 64°. Wednesday Night Mostly cloudy, with a low around 49°. Thursday Mostly sunny, with a high near 66°. Today Showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. High near 62. South wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. Tonight Rain and thunderstorms likely. Mostly cloudy, with a low around 50. South southwest wind 7 to 9 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. Saturday Rain, mainly before 2pm, then showers and possibly a thunderstorm after 2pm. High near 62. South wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible. Saturday Night Showers and possibly a thunderstorm. Low around 47. South southwest wind 11 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible. Sunday Showers and possibly a thunderstorm. High near 60. Southwest wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible. Sunday Night A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 46. New precipitation amounts of less than a tenth of an inch possible. Monday Mostly sunny, with a high near 62. Monday Night Mostly clear, with a low around 48. Tuesday Mostly sunny, with a high near 62. Tuesday Night Mostly clear, with a low around 47. Wednesday Mostly sunny, with a high near 64. Wednesday Night Mostly cloudy, with a low around 49. Thursday Mostly sunny, with a high near 66.
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