478
FNUS86 KMTR 181220
FWLMTR
ECCDA DISCUSSIONS
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
520 AM PDT TUE AUG 18 2026
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## DISCUSSIONS FROM THE LATEST FWF BELOW ##
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..DISCUSSION FROM SFOFWFMTR
DRIER AND SLIGHTLY WARMER INTERIOR CONDITIONS CONTINUE THROUGH LATE
WEEK AS HIGH PRESSURE EXPANDS INTO CALIFORNIA. THE MARINE LAYER
WILL GRADUALLY COMPRESS FROM 1500 FEET TO 1000 FEET AS HIGH PRESSURE
STRENGTHENS WITH INLAND STRATUS INTRUSIONS BECOMING LESS WIDESPREAD
BY LATE WEEK. THIS WILL RESULT IN POOR TO MODERATE OVERNIGHT
RECOVERIES (20-40%) AND POOR DAYTIME HUMIDITY RETENTION (10-35%)
ABOVE THE MARINE LAYER AND ACROSS THE INTERIOR CENTRAL COAST.
LOCATIONS WITHIN THE MARINE LAYER WILL CONTINUE TO SEE EXCELLENT
OVERNIGHT RECOVERIES AND FAIR TO EXCELLENT DAYTIME HUMIDITY
RETENTION. PATCHY FOG AND DRIZZLE ARE POSSIBLE DIRECTLY ALONG THE
COASTLINE EACH MORNING THROUGH MID WEEK. DIURNALLY BREEZY ONSHORE
WINDS CONTINUE ACROSS FAVORED MOUNTAIN GAPS/PASSES, ALONG THE
COAST, AND ACROSS THE HIGHEST RIDGELINES.
..DISCUSSION FROM SFOFWFEKA
GENERALLY NEAR NORMAL TEMPERATURES ARE EXPECTED THROUGH MID WEEK
WITH 80S TO MID 90S FORECAST FOR MOST INTERIOR VALLEYS. AFTERNOON
RELATIVE HUMIDITIES ARE FORECAST TO BE IN THE HIGH TEENS TO THE
20S. OVERNIGHT RECOVERIES ARE FORECAST TO BE GOOD TO EXCELLENT IN
THE LOWER ELEVATIONS AND MODERATE TO LOCALLY POOR IN THE HIGHER
ELEVATIONS. WINDS REMAIN RELATIVELY LIGHT AND TERRAIN DRIVEN, WITH
TYPICAL BREEZES IN THE AFTERNOONS. LATE IN THE WEEK ANOTHER TROUGH
IS EXPECTED TO BRING COOLER TEMPERATURES AND HIGHER RH. THERE IS A
LOW END POTENTIAL FOR A FEW THUNDERSTORMS FRIDAY IN THE INLAND
AREAS. INCREASED WINDS ARE ALSO EXPECTED ON FRIDAY.
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## COMPLETE A DISCUSSION FOR EACH ECCDA SEGMENT BELOW ##
## WHEN DONE CLICK TRANSMIT, PRODUCT SENT AS KMTRFWLMTR ##
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ECC010-190030-
ST HELENA ECC DISPATCH-
DISCUSSION FOR MARIN AND SONOMA AND NAPA COUNTIES
520 AM PDT TUE AUG 18 2026
DRIER AND SLIGHTLY WARMER INTERIOR CONDITIONS CONTINUE THROUGH LATE
WEEK AS HIGH PRESSURE EXPANDS INTO CALIFORNIA. THE MARINE LAYER
WILL GRADUALLY COMPRESS FROM 1500 FEET TO 1000 FEET AS HIGH PRESSURE
STRENGTHENS WITH INLAND STRATUS INTRUSIONS BECOMING LESS WIDESPREAD
BY LATE WEEK. THIS WILL RESULT IN POOR TO MODERATE OVERNIGHT
RECOVERIES (20-40%) AND POOR DAYTIME HUMIDITY RETENTION (10-35%)
ABOVE THE MARINE LAYER AND ACROSS THE INTERIOR CENTRAL COAST.
LOCATIONS WITHIN THE MARINE LAYER WILL CONTINUE TO SEE EXCELLENT
OVERNIGHT RECOVERIES AND FAIR TO EXCELLENT DAYTIME HUMIDITY
RETENTION. PATCHY FOG AND DRIZZLE ARE POSSIBLE DIRECTLY ALONG THE
COASTLINE EACH MORNING THROUGH MID WEEK. DIURNALLY BREEZY ONSHORE
WINDS CONTINUE ACROSS FAVORED MOUNTAIN GAPS/PASSES, ALONG THE
COAST, AND ACROSS THE HIGHEST RIDGELINES.
ECC014-190030-
MORGAN HILL ECC DISPATCH-
DISCUSSION FOR ALAMEDA AND CONTRA COSTA AND SANTA CLARA COUNTIES
520 AM PDT TUE AUG 18 2026
DRIER AND SLIGHTLY WARMER INTERIOR CONDITIONS CONTINUE THROUGH LATE
WEEK AS HIGH PRESSURE EXPANDS INTO CALIFORNIA. THE MARINE LAYER
WILL GRADUALLY COMPRESS FROM 1500 FEET TO 1000 FEET AS HIGH PRESSURE
STRENGTHENS WITH INLAND STRATUS INTRUSIONS BECOMING LESS WIDESPREAD
BY LATE WEEK. THIS WILL RESULT IN POOR TO MODERATE OVERNIGHT
RECOVERIES (20-40%) AND POOR DAYTIME HUMIDITY RETENTION (10-35%)
ABOVE THE MARINE LAYER AND ACROSS THE INTERIOR CENTRAL COAST.
LOCATIONS WITHIN THE MARINE LAYER WILL CONTINUE TO SEE EXCELLENT
OVERNIGHT RECOVERIES AND FAIR TO EXCELLENT DAYTIME HUMIDITY
RETENTION. PATCHY FOG AND DRIZZLE ARE POSSIBLE DIRECTLY ALONG THE
COASTLINE EACH MORNING THROUGH MID WEEK. DIURNALLY BREEZY ONSHORE
WINDS CONTINUE ACROSS FAVORED MOUNTAIN GAPS/PASSES, ALONG THE
COAST, AND ACROSS THE HIGHEST RIDGELINES.
ECC013-190030-
FELTON ECC DISPATCH-
DISCUSSION FOR SANTA CRUZ AND SAN MATEO COUNTIES
520 AM PDT TUE AUG 18 2026
DRIER AND SLIGHTLY WARMER INTERIOR CONDITIONS CONTINUE THROUGH LATE
WEEK AS HIGH PRESSURE EXPANDS INTO CALIFORNIA. THE MARINE LAYER
WILL GRADUALLY COMPRESS FROM 1500 FEET TO 1000 FEET AS HIGH PRESSURE
STRENGTHENS WITH INLAND STRATUS INTRUSIONS BECOMING LESS WIDESPREAD
BY LATE WEEK. THIS WILL RESULT IN POOR TO MODERATE OVERNIGHT
RECOVERIES (20-40%) AND POOR DAYTIME HUMIDITY RETENTION (10-35%)
ABOVE THE MARINE LAYER AND ACROSS THE INTERIOR CENTRAL COAST.
LOCATIONS WITHIN THE MARINE LAYER WILL CONTINUE TO SEE EXCELLENT
OVERNIGHT RECOVERIES AND FAIR TO EXCELLENT DAYTIME HUMIDITY
RETENTION. PATCHY FOG AND DRIZZLE ARE POSSIBLE DIRECTLY ALONG THE
COASTLINE EACH MORNING THROUGH MID WEEK. DIURNALLY BREEZY ONSHORE
WINDS CONTINUE ACROSS FAVORED MOUNTAIN GAPS/PASSES, ALONG THE
COAST, AND ACROSS THE HIGHEST RIDGELINES.
ECC018-190030-
MONTEREY ECC DISPATCH-
DISCUSSION FOR MONTEREY AND SAN BENITO COUNTY
520 AM PDT TUE AUG 18 2026
DRIER AND SLIGHTLY WARMER INTERIOR CONDITIONS CONTINUE THROUGH LATE
WEEK AS HIGH PRESSURE EXPANDS INTO CALIFORNIA. THE MARINE LAYER
WILL GRADUALLY COMPRESS FROM 1500 FEET TO 1000 FEET AS HIGH PRESSURE
STRENGTHENS WITH INLAND STRATUS INTRUSIONS BECOMING LESS WIDESPREAD
BY LATE WEEK. THIS WILL RESULT IN POOR TO MODERATE OVERNIGHT
RECOVERIES (20-40%) AND POOR DAYTIME HUMIDITY RETENTION (10-35%)
ABOVE THE MARINE LAYER AND ACROSS THE INTERIOR CENTRAL COAST.
LOCATIONS WITHIN THE MARINE LAYER WILL CONTINUE TO SEE EXCELLENT
OVERNIGHT RECOVERIES AND FAIR TO EXCELLENT DAYTIME HUMIDITY
RETENTION. PATCHY FOG AND DRIZZLE ARE POSSIBLE DIRECTLY ALONG THE
COASTLINE EACH MORNING THROUGH MID WEEK. DIURNALLY BREEZY ONSHORE
WINDS CONTINUE ACROSS FAVORED MOUNTAIN GAPS/PASSES, ALONG THE
COAST, AND ACROSS THE HIGHEST RIDGELINES.
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