447
FNUS86 KMTR 202139
FWLMTR
ECCDA DISCUSSIONS
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
239 PM PDT SUN SEP 20 2026
#####################################################################
## ##
## DISCUSSIONS FROM THE LATEST FWF BELOW ##
## ##
#####################################################################
..DISCUSSION FROM SFOFWFMTR
COOL, HUMID CONDITIONS CONTINUE THROUGH MONDAY AS AN UPPER LEVEL
LOW BRINGS AMPLE CLOUD COVER. THERE IS ALSO A CHANCE FOR LIGHT
DRIZZLE MONDAY MORNING. BY TUESDAY THE LOW WILL MOVE OFF TO THE
EAST, ALLOWING A GRADUAL WARMING AND DRYING TREND AS THE MARINE
LAYER COMPRESSES. THE AIR ABOVE THE MARINE LAYER LOOKS DRY, WITH
THE POTENTIAL FOR NOCTURNAL DRYING TO BRING THE RH TO 20% OR LOWER
AT TIMES THIS WEEK. WINDS WILL BE RELATIVELY LIGHT THROUGH THE
WEEK, BUT MAY FLIP OFFSHORE ON WEDNESDAY. THE RIDGE IS EXPECTED TO
BREAK DOWN ON FRIDAY, BRINGING STRONGER ONSHORE WINDS AND THE
RETURN OF COOLER TEMPERATURES NEXT WEEKEND.
..DISCUSSION FROM SFOFWFEKA
HIGH PRESSURE OVER THE PACIFIC NORTHWEST WILL MAINTAIN WARM, DRY
WEATHER ACROSS INTERIOR VALLEYS THROUGH MONDAY WITH ZERO CHANCE OF
WETTING RAIN. INTERIOR HIGHS WILL CONTINUE REACH THE LOW 980S WITH
RH AROUND 20 PERCENT. DAYTIME WINDS WILL REMAIN GENTLE AND TERRAIN
DRIVEN. LIGHT OFFSHORE WINDS WITH AN EASTERLY COMPONENT WILL
DEVELOP TUESDAY NIGHT INTO WEDNESDAY MORNING AS LOW PRESSURE SYSTEM
MOVES OVERHEAD. THIS LOW WILL ALSO COOL CONDITIONS SLIGHTLY MID
WEEK AND PULL IN MORE MARINE INFLUENCE.
#####################################################################
## ##
## COMPLETE A DISCUSSION FOR EACH ECCDA SEGMENT BELOW ##
## WHEN DONE CLICK TRANSMIT, PRODUCT SENT AS KMTRFWLMTR ##
## ##
#####################################################################
ECC010-210945-
ST HELENA ECC DISPATCH-
DISCUSSION FOR MARIN AND SONOMA AND NAPA COUNTIES
239 PM PDT SUN SEP 20 2026
COOL, HUMID CONDITIONS CONTINUE THROUGH MONDAY AS AN UPPER LEVEL
LOW BRINGS AMPLE CLOUD COVER. THERE IS ALSO A CHANCE FOR LIGHT
DRIZZLE MONDAY MORNING. BY TUESDAY THE LOW WILL MOVE OFF TO THE
EAST, ALLOWING A GRADUAL WARMING AND DRYING TREND AS THE MARINE
LAYER COMPRESSES. THE AIR ABOVE THE MARINE LAYER LOOKS DRY, WITH
THE POTENTIAL FOR NOCTURNAL DRYING TO BRING THE RH TO 20% OR LOWER
AT TIMES THIS WEEK. WINDS WILL BE RELATIVELY LIGHT THROUGH THE
WEEK, BUT MAY FLIP OFFSHORE ON WEDNESDAY. THE RIDGE IS EXPECTED TO
BREAK DOWN ON FRIDAY, BRINGING STRONGER ONSHORE WINDS AND THE
RETURN OF COOLER TEMPERATURES NEXT WEEKEND.
ECC014-210945-
MORGAN HILL ECC DISPATCH-
DISCUSSION FOR ALAMEDA AND CONTRA COSTA AND SANTA CLARA COUNTIES
239 PM PDT SUN SEP 20 2026
COOL, HUMID CONDITIONS CONTINUE THROUGH MONDAY AS AN UPPER LEVEL
LOW BRINGS AMPLE CLOUD COVER. THERE IS ALSO A CHANCE FOR LIGHT
DRIZZLE MONDAY MORNING. BY TUESDAY THE LOW WILL MOVE OFF TO THE
EAST, ALLOWING A GRADUAL WARMING AND DRYING TREND AS THE MARINE
LAYER COMPRESSES. THE AIR ABOVE THE MARINE LAYER LOOKS DRY, WITH
THE POTENTIAL FOR NOCTURNAL DRYING TO BRING THE RH TO 20% OR LOWER
AT TIMES THIS WEEK. WINDS WILL BE RELATIVELY LIGHT THROUGH THE
WEEK, BUT MAY FLIP OFFSHORE ON WEDNESDAY. THE RIDGE IS EXPECTED TO
BREAK DOWN ON FRIDAY, BRINGING STRONGER ONSHORE WINDS AND THE
RETURN OF COOLER TEMPERATURES NEXT WEEKEND.
ECC013-210945-
FELTON ECC DISPATCH-
DISCUSSION FOR SANTA CRUZ AND SAN MATEO COUNTIES
239 PM PDT SUN SEP 20 2026
COOL, HUMID CONDITIONS CONTINUE THROUGH MONDAY AS AN UPPER LEVEL
LOW BRINGS AMPLE CLOUD COVER. THERE IS ALSO A CHANCE FOR LIGHT
DRIZZLE MONDAY MORNING. BY TUESDAY THE LOW WILL MOVE OFF TO THE
EAST, ALLOWING A GRADUAL WARMING AND DRYING TREND AS THE MARINE
LAYER COMPRESSES. THE AIR ABOVE THE MARINE LAYER LOOKS DRY, WITH
THE POTENTIAL FOR NOCTURNAL DRYING TO BRING THE RH TO 20% OR LOWER
AT TIMES THIS WEEK. WINDS WILL BE RELATIVELY LIGHT THROUGH THE
WEEK, BUT MAY FLIP OFFSHORE ON WEDNESDAY. THE RIDGE IS EXPECTED TO
BREAK DOWN ON FRIDAY, BRINGING STRONGER ONSHORE WINDS AND THE
RETURN OF COOLER TEMPERATURES NEXT WEEKEND.
ECC018-210945-
MONTEREY ECC DISPATCH-
DISCUSSION FOR MONTEREY AND SAN BENITO COUNTY
239 PM PDT SUN SEP 20 2026
COOL, HUMID CONDITIONS CONTINUE THROUGH MONDAY AS AN UPPER LEVEL
LOW BRINGS AMPLE CLOUD COVER. THERE IS ALSO A CHANCE FOR LIGHT
DRIZZLE MONDAY MORNING. BY TUESDAY THE LOW WILL MOVE OFF TO THE
EAST, ALLOWING A GRADUAL WARMING AND DRYING TREND AS THE MARINE
LAYER COMPRESSES. THE AIR ABOVE THE MARINE LAYER LOOKS DRY, WITH
THE POTENTIAL FOR NOCTURNAL DRYING TO BRING THE RH TO 20% OR LOWER
AT TIMES THIS WEEK. WINDS WILL BE RELATIVELY LIGHT THROUGH THE
WEEK, BUT MAY FLIP OFFSHORE ON WEDNESDAY. THE RIDGE IS EXPECTED TO
BREAK DOWN ON FRIDAY, BRINGING STRONGER ONSHORE WINDS AND THE
RETURN OF COOLER TEMPERATURES NEXT WEEKEND.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page