840
FNUS86 KMTR 210842
FWLMTR
ECCDA DISCUSSIONS
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
142 AM PDT TUE OCT 21 2025
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## DISCUSSIONS FROM THE LATEST FWF BELOW ##
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..DISCUSSION FROM SFOFWFMTR
WEAK OFFSHORE FLOW CONTINUES THIS MORNING PROMOTING DRY CONDITIONS.
ONSHORE FLOW AND DEEP MOISTURE RETURNS THIS EVENING ALONG WITH SOME
MARGINAL INSTABILITY ASSOCIATED WITH AN UPPER LOW MOVING IN FROM THE
SOUTH. THERE IS A SLIGHT CHANCE (15-20%) OF DRY LIGHTNING ACROSS THE
INTERIOR CENTRAL COAST AND BAY AREA LATE TONIGHT INTO WEDNESDAY
MORNING. A NEW STORM SYSTEM WILL BRING COOLER TEMPS AND WET WEATHER
TO THE REGION BY FRIDAY EVENING THROUGH THE WEEKEND.
..DISCUSSION FROM SFOFWFEKA
DRIER AND WARMER WEATHER CONDITIONS TODAY. OFFSHORE FLOW INCREASING
EARLY THIS MORNING, WITH GUSTS GENERALLY AROUND 20 TO 30 MPH OVER
THE HIGHER TERRAIN. INTERIOR HIGHS BACK AROUND 80F AND MINIMUM RH
BELOW 30 PERCENT. A SOUTHERLY REVERSAL STRATUS SURGE TONIGHT INTO
WEDNESDAY, WITH A SHALLOW MARINE LAYER CHARGING UP AND LAPPING
THE COASTAL AREAS. THIS WILL BRING A PUSH OF MARINE AIR TO THE
INTERIOR ON WEDNESDAY, PROMOTING INCREASING OVERNIGHT RH
RECOVERIES AND DAYTIME HUMIDITY BACK TO ABOVE 30%. CONFIDENCES
REMAIN HIGH WITH A MODERATE ATMOSPHERIC RIVER (AR) IMPACTING THE
REGION FRIDAY THROUGH THE WEEKEND, BRINGING HEAVY RAINFALL, HIGH-
ELEVATION SNOW AND STRONG SOUTHERLY WINDS.
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## COMPLETE A DISCUSSION FOR EACH ECCDA SEGMENT BELOW ##
## WHEN DONE CLICK TRANSMIT, PRODUCT SENT AS KMTRFWLMTR ##
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ECC010-212045-
ST HELENA ECC DISPATCH-
DISCUSSION FOR MARIN AND SONOMA AND NAPA COUNTIES
142 AM PDT TUE OCT 21 2025
WEAK OFFSHORE FLOW CONTINUES THIS MORNING PROMOTING DRY CONDITIONS.
ONSHORE FLOW AND DEEP MOISTURE RETURNS THIS EVENING ALONG WITH SOME
MARGINAL INSTABILITY ASSOCIATED WITH AN UPPER LOW MOVING IN FROM THE
SOUTH. THERE IS A SLIGHT CHANCE (15-20%) OF DRY LIGHTNING ACROSS THE
INTERIOR CENTRAL COAST AND BAY AREA LATE TONIGHT INTO WEDNESDAY
MORNING. A NEW STORM SYSTEM WILL BRING COOLER TEMPS AND WET WEATHER
TO THE REGION BY FRIDAY EVENING THROUGH THE WEEKEND.
ECC014-212045-
MORGAN HILL ECC DISPATCH-
DISCUSSION FOR ALAMEDA AND CONTRA COSTA AND SANTA CLARA COUNTIES
142 AM PDT TUE OCT 21 2025
WEAK OFFSHORE FLOW CONTINUES THIS MORNING PROMOTING DRY CONDITIONS.
ONSHORE FLOW AND DEEP MOISTURE RETURNS THIS EVENING ALONG WITH SOME
MARGINAL INSTABILITY ASSOCIATED WITH AN UPPER LOW MOVING IN FROM THE
SOUTH. THERE IS A SLIGHT CHANCE (15-20%) OF DRY LIGHTNING ACROSS THE
INTERIOR CENTRAL COAST AND BAY AREA LATE TONIGHT INTO WEDNESDAY
MORNING. A NEW STORM SYSTEM WILL BRING COOLER TEMPS AND WET WEATHER
TO THE REGION BY FRIDAY EVENING THROUGH THE WEEKEND.
ECC013-212045-
FELTON ECC DISPATCH-
DISCUSSION FOR SANTA CRUZ AND SAN MATEO COUNTIES
142 AM PDT TUE OCT 21 2025
WEAK OFFSHORE FLOW CONTINUES THIS MORNING PROMOTING DRY CONDITIONS.
ONSHORE FLOW AND DEEP MOISTURE RETURNS THIS EVENING ALONG WITH SOME
MARGINAL INSTABILITY ASSOCIATED WITH AN UPPER LOW MOVING IN FROM THE
SOUTH. THERE IS A SLIGHT CHANCE (15-20%) OF DRY LIGHTNING ACROSS THE
INTERIOR CENTRAL COAST AND BAY AREA LATE TONIGHT INTO WEDNESDAY
MORNING. A NEW STORM SYSTEM WILL BRING COOLER TEMPS AND WET WEATHER
TO THE REGION BY FRIDAY EVENING THROUGH THE WEEKEND.
ECC018-212045-
MONTEREY ECC DISPATCH-
DISCUSSION FOR MONTEREY AND SAN BENITO COUNTY
142 AM PDT TUE OCT 21 2025
WEAK OFFSHORE FLOW CONTINUES THIS MORNING PROMOTING DRY CONDITIONS.
ONSHORE FLOW AND DEEP MOISTURE RETURNS THIS EVENING ALONG WITH SOME
MARGINAL INSTABILITY ASSOCIATED WITH AN UPPER LOW MOVING IN FROM THE
SOUTH. THERE IS A SLIGHT CHANCE (15-20%) OF DRY LIGHTNING ACROSS THE
INTERIOR CENTRAL COAST AND BAY AREA LATE TONIGHT INTO WEDNESDAY
MORNING. A NEW STORM SYSTEM WILL BRING COOLER TEMPS AND WET WEATHER
TO THE REGION BY FRIDAY EVENING THROUGH THE WEEKEND.
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