196  
FNUS86 KLOX 122253  
FWLLOX  
 
ECCDA DISCUSSIONS  
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA  
353 PM PDT MON APR 12 2021  
 
ECC029-131700-  
LOS PADRES NATIONAL FOREST-  
DISCUSSION FOR VANDENBERG ECC DISPATCH  
353 PM PDT MON APR 12 2021  
   
..DISCUSSION FROM LOS ANGELES/OXNARD
 
 
...GUSTY ONSHORE WINDS ACROSS THE DESERTS AND NEARBY FOOTHILL AREAS  
THROUGH WEDNESDAY...  
 
AN UPPER LEVEL TROUGH OVER THE GREAT BASIN WILL BRING STRENGTHENING  
ONSHORE FLOW AND A DEEPENING MARINE LAYER THROUGH WEDNESDAY. AS A  
RESULT, EXPECT A COOLING TREND WITH INCREASING HUMIDITIES THROUGH  
MID WEEK. THE MARINE LAYER DEPTH SHOULD RISE TO AROUND 5000 FEET BY  
TUESDAY MORNING, RESULTING IN LOW CLOUDS, FOG, AND DRIZZLE ACROSS  
SOME FOOTHILL AND COASTAL SLOPES AND MAINLY OVER AREAS OF LOS  
ANGELES COUNTY. GUSTY ONSHORE WINDS ACROSS THE DESERT AND NEARBY  
FOOTHILL AREAS THIS AFTERNOON AND EVENING WILL PEAK ON TUESDAY AND  
AGAIN ON WEDNESDAY WHEN GUSTS OF 35 TO 50 MPH ARE EXPECTED,  
EXCEPT ISOLATED GUSTS TO 60 MPH AT TIMES IN THE FOOTHILLS OF THE  
ANTELOPE VALLEY. MINIMUM HUMIDITIES THIS AFTERNOON DOWN TO THE MID  
TO LOWER TEENS OVER THE ANTELOPE VALLEY AND PARTS OF THE VENTURA  
COUNTY MOUNTAINS ARE EXPECTED TO STAY ABOVE CRITICAL LEVELS  
TUESDAY AND WEDNESDAY AFTERNOONS. A RIDGE OF HIGH PRESSURE WILL  
BEGIN TO BUILD OVER THE AREA ON THURSDAY WHICH WILL WEAKEN THE  
ONSHORE FLOW AND BRING A WARMING AND DRYING TREND INTO THE WEEKEND  
AND EARLY NEXT WEEK.  
 
   
..DISCUSSION FROM MONTEREY
 
 
A DRY COLD FRONT WILL SWEEP FROM NORTH TO SOUTH ACROSS THE DISTRICT  
LATE MONDAY NIGHT. LOCALLY GUSTY WEST TO NORTHWEST WINDS WILL  
DEVELOP BEHIND THE FRONT LATE MONDAY NIGHT AND CONTINUE THROUGH  
TUESDAY. STRONGEST WINDS WILL BE NEAR THE COAST AND THROUGH GAPS  
IN THE TERRAIN. COOLER TEMPERATURES ARE FORECAST STARTING TUESDAY,  
BUT THE AIRMASS WILL REMAIN DRY, ESPECIALLY ACROSS THE INLAND  
HILLS. WINDS WILL SUBSIDE IN MOST LOCATIONS ON TUESDAY EVENING,  
BUT BREEZY NORTH TO NORTHEAST WILL CONTINUE ACROSS THE NORTH BAY  
HILLS THROUGH TUESDAY NIGHT. A WARMING TREND IS FORECAST STARTING  
LATE IN THE WEEK, AND ESPECIALLY OVER THE UPCOMING WEEKEND, AS  
HIGH PRESSURE BUILDS OVER CALIFORNIA.  
 
NOTE : ALL WINDS ARE 20-FOOT WINDS UNLESS OTHERWISE SPECIFIED.  
THUNDERSTORMS IMPLY STRONG, GUSTY AND ERRATIC WINDS.  
 

 
 
ECC028-131700-  
SANTA BARBARA COUNTY EXCLUDING LOS PADRES NATIONAL FOREST-  
DISCUSSION FOR SANTA BARBARA ECC DISPATCH  
353 PM PDT MON APR 12 2021  
 
...GUSTY ONSHORE WINDS ACROSS THE DESERTS AND NEARBY FOOTHILL AREAS  
THROUGH WEDNESDAY...  
 
AN UPPER LEVEL TROUGH OVER THE GREAT BASIN WILL BRING STRENGTHENING  
ONSHORE FLOW AND A DEEPENING MARINE LAYER THROUGH WEDNESDAY. AS A  
RESULT, EXPECT A COOLING TREND WITH INCREASING HUMIDITIES THROUGH  
MID WEEK. THE MARINE LAYER DEPTH SHOULD RISE TO AROUND 5000 FEET  
BY TUESDAY MORNING, RESULTING IN LOW CLOUDS, FOG, AND DRIZZLE  
ACROSS SOME FOOTHILL AND COASTAL SLOPES AND MAINLY OVER AREAS OF  
LOS ANGELES COUNTY. GUSTY ONSHORE WINDS ACROSS THE DESERT AND  
NEARBY FOOTHILL AREAS THIS AFTERNOON AND EVENING WILL PEAK ON  
TUESDAY AND AGAIN ON WEDNESDAY WHEN GUSTS OF 35 TO 50 MPH ARE  
EXPECTED, EXCEPT ISOLATED GUSTS TO 60 MPH AT TIMES IN THE  
FOOTHILLS OF THE ANTELOPE VALLEY. MINIMUM HUMIDITIES THIS  
AFTERNOON DOWN TO THE MID TO LOWER TEENS OVER THE ANTELOPE VALLEY  
AND PARTS OF THE VENTURA COUNTY MOUNTAINS ARE EXPECTED TO STAY  
ABOVE CRITICAL LEVELS TUESDAY AND WEDNESDAY AFTERNOONS. A RIDGE OF  
HIGH PRESSURE WILL BEGIN TO BUILD OVER THE AREA ON THURSDAY WHICH  
WILL WEAKEN THE ONSHORE FLOW AND BRING A WARMING AND DRYING TREND  
INTO THE WEEKEND AND EARLY NEXT WEEK.  
 

 
 
ECC031-131700-  
ANGELES NATIONAL FOREST-  
DISCUSSION FOR LANCASTER ECC DISPATCH  
353 PM PDT MON APR 12 2021  
 
...GUSTY ONSHORE WINDS ACROSS THE DESERTS AND NEARBY FOOTHILL AREAS  
THROUGH WEDNESDAY...  
 
AN UPPER LEVEL TROUGH OVER THE GREAT BASIN WILL BRING STRENGTHENING  
ONSHORE FLOW AND A DEEPENING MARINE LAYER THROUGH WEDNESDAY. AS A  
RESULT, EXPECT A COOLING TREND WITH INCREASING HUMIDITIES THROUGH  
MID WEEK. THE MARINE LAYER DEPTH SHOULD RISE TO AROUND 5000 FEET  
BY TUESDAY MORNING, RESULTING IN LOW CLOUDS, FOG, AND DRIZZLE  
ACROSS SOME FOOTHILL AND COASTAL SLOPES AND MAINLY OVER AREAS OF  
LOS ANGELES COUNTY. GUSTY ONSHORE WINDS ACROSS THE DESERT AND  
NEARBY FOOTHILL AREAS THIS AFTERNOON AND EVENING WILL PEAK ON  
TUESDAY AND AGAIN ON WEDNESDAY WHEN GUSTS OF 35 TO 50 MPH ARE  
EXPECTED, EXCEPT ISOLATED GUSTS TO 60 MPH AT TIMES IN THE  
FOOTHILLS OF THE ANTELOPE VALLEY. MINIMUM HUMIDITIES THIS  
AFTERNOON DOWN TO THE MID TO LOWER TEENS OVER THE ANTELOPE VALLEY  
AND PARTS OF THE VENTURA COUNTY MOUNTAINS ARE EXPECTED TO STAY  
ABOVE CRITICAL LEVELS TUESDAY AND WEDNESDAY AFTERNOONS. A RIDGE OF  
HIGH PRESSURE WILL BEGIN TO BUILD OVER THE AREA ON THURSDAY WHICH  
WILL WEAKEN THE ONSHORE FLOW AND BRING A WARMING AND DRYING TREND  
INTO THE WEEKEND AND EARLY NEXT WEEK.  
 

 
 
ECC024-131700-  
SAN LUIS OBISPO COUNTY-  
DISCUSSION FOR SAN LUIS OBISPO ECC DISPATCH  
353 PM PDT MON APR 12 2021  
 
...GUSTY ONSHORE WINDS ACROSS THE DESERTS AND NEARBY FOOTHILL AREAS  
THROUGH WEDNESDAY...  
 
AN UPPER LEVEL TROUGH OVER THE GREAT BASIN WILL BRING STRENGTHENING  
ONSHORE FLOW AND A DEEPENING MARINE LAYER THROUGH WEDNESDAY. AS A  
RESULT, EXPECT A COOLING TREND WITH INCREASING HUMIDITIES THROUGH  
MID WEEK. THE MARINE LAYER DEPTH SHOULD RISE TO AROUND 5000 FEET  
BY TUESDAY MORNING, RESULTING IN LOW CLOUDS, FOG, AND DRIZZLE  
ACROSS SOME FOOTHILL AND COASTAL SLOPES AND MAINLY OVER AREAS OF  
LOS ANGELES COUNTY. GUSTY ONSHORE WINDS ACROSS THE DESERT AND  
NEARBY FOOTHILL AREAS THIS AFTERNOON AND EVENING WILL PEAK ON  
TUESDAY AND AGAIN ON WEDNESDAY WHEN GUSTS OF 35 TO 50 MPH ARE  
EXPECTED, EXCEPT ISOLATED GUSTS TO 60 MPH AT TIMES IN THE  
FOOTHILLS OF THE ANTELOPE VALLEY. MINIMUM HUMIDITIES THIS  
AFTERNOON DOWN TO THE MID TO LOWER TEENS OVER THE ANTELOPE VALLEY  
AND PARTS OF THE VENTURA COUNTY MOUNTAINS ARE EXPECTED TO STAY  
ABOVE CRITICAL LEVELS TUESDAY AND WEDNESDAY AFTERNOONS. A RIDGE OF  
HIGH PRESSURE WILL BEGIN TO BUILD OVER THE AREA ON THURSDAY WHICH  
WILL WEAKEN THE ONSHORE FLOW AND BRING A WARMING AND DRYING TREND  
INTO THE WEEKEND AND EARLY NEXT WEEK.  
 

 
 
ECC032-131700-  
VENTURA COUNTY EXCLUDING LOS PADRES NATIONAL FOREST-  
DISCUSSION FOR VENTURA ECC DISPATCH  
353 PM PDT MON APR 12 2021  
 
...GUSTY ONSHORE WINDS ACROSS THE DESERTS AND NEARBY FOOTHILL AREAS  
THROUGH WEDNESDAY...  
 
AN UPPER LEVEL TROUGH OVER THE GREAT BASIN WILL BRING STRENGTHENING  
ONSHORE FLOW AND A DEEPENING MARINE LAYER THROUGH WEDNESDAY. AS A  
RESULT, EXPECT A COOLING TREND WITH INCREASING HUMIDITIES THROUGH  
MID WEEK. THE MARINE LAYER DEPTH SHOULD RISE TO AROUND 5000 FEET  
BY TUESDAY MORNING, RESULTING IN LOW CLOUDS, FOG, AND DRIZZLE  
ACROSS SOME FOOTHILL AND COASTAL SLOPES AND MAINLY OVER AREAS OF  
LOS ANGELES COUNTY. GUSTY ONSHORE WINDS ACROSS THE DESERT AND  
NEARBY FOOTHILL AREAS THIS AFTERNOON AND EVENING WILL PEAK ON  
TUESDAY AND AGAIN ON WEDNESDAY WHEN GUSTS OF 35 TO 50 MPH ARE  
EXPECTED, EXCEPT ISOLATED GUSTS TO 60 MPH AT TIMES IN THE  
FOOTHILLS OF THE ANTELOPE VALLEY. MINIMUM HUMIDITIES THIS  
AFTERNOON DOWN TO THE MID TO LOWER TEENS OVER THE ANTELOPE VALLEY  
AND PARTS OF THE VENTURA COUNTY MOUNTAINS ARE EXPECTED TO STAY  
ABOVE CRITICAL LEVELS TUESDAY AND WEDNESDAY AFTERNOONS. A RIDGE OF  
HIGH PRESSURE WILL BEGIN TO BUILD OVER THE AREA ON THURSDAY WHICH  
WILL WEAKEN THE ONSHORE FLOW AND BRING A WARMING AND DRYING TREND  
INTO THE WEEKEND AND EARLY NEXT WEEK.  
 

 
 
ECC030-131700-  
LOS ANGELES COUNTY EXCLUDING ANGELES NATIONAL FOREST-  
DISCUSSION FOR LOS ANGELES ECC DISPATCH  
353 PM PDT MON APR 12 2021  
 
...GUSTY ONSHORE WINDS ACROSS THE DESERTS AND NEARBY FOOTHILL AREAS  
THROUGH WEDNESDAY...  
 
AN UPPER LEVEL TROUGH OVER THE GREAT BASIN WILL BRING STRENGTHENING  
ONSHORE FLOW AND A DEEPENING MARINE LAYER THROUGH WEDNESDAY. AS A  
RESULT, EXPECT A COOLING TREND WITH INCREASING HUMIDITIES THROUGH  
MID WEEK. THE MARINE LAYER DEPTH SHOULD RISE TO AROUND 5000 FEET  
BY TUESDAY MORNING, RESULTING IN LOW CLOUDS, FOG, AND DRIZZLE  
ACROSS SOME FOOTHILL AND COASTAL SLOPES AND MAINLY OVER AREAS OF  
LOS ANGELES COUNTY. GUSTY ONSHORE WINDS ACROSS THE DESERT AND  
NEARBY FOOTHILL AREAS THIS AFTERNOON AND EVENING WILL PEAK ON  
TUESDAY AND AGAIN ON WEDNESDAY WHEN GUSTS OF 35 TO 50 MPH ARE  
EXPECTED, EXCEPT ISOLATED GUSTS TO 60 MPH AT TIMES IN THE  
FOOTHILLS OF THE ANTELOPE VALLEY. MINIMUM HUMIDITIES THIS  
AFTERNOON DOWN TO THE MID TO LOWER TEENS OVER THE ANTELOPE VALLEY  
AND PARTS OF THE VENTURA COUNTY MOUNTAINS ARE EXPECTED TO STAY  
ABOVE CRITICAL LEVELS TUESDAY AND WEDNESDAY AFTERNOONS. A RIDGE OF  
HIGH PRESSURE WILL BEGIN TO BUILD OVER THE AREA ON THURSDAY WHICH  
WILL WEAKEN THE ONSHORE FLOW AND BRING A WARMING AND DRYING TREND  
INTO THE WEEKEND AND EARLY NEXT WEEK.  
 

 
 
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