281  
FXUS66 KEKA 260724  
AFDEKA  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE EUREKA CA  
1224 AM PDT SAT JUL 26 2025  
   
SYNOPSIS  
THUNDERSTORM CHANCES DROP OFF FOR THE WEEKEND. NEAR  
NORMAL TO SLIGHTLY BELOW NORMAL TEMPERATURES EXPECTED INTO EARLY  
NEXT WEEK. TEMPERATURES TREND SLIGHTLY UPWARD TOWARDS THE LATER  
PARTS OF NEXT WEEK.  
 
 
   
DISCUSSION  
THE UPPER LOW THAT BROUGHT CONVECTION TO MOSTLY  
TRINITY COUNTY ON FRIDAY MOVES TO THE EAST SATURDAY, TAKING MOST  
MID-LEVEL MOISTURE WITH IT. AS A RESULT, THUNDERSTORM CHANCES  
SIGNIFICANTLY DECLINE INTO THE WEEKEND; HOWEVER, ISOLATED  
THUNDERSTORMS COULD STILL OCCUR IN THE AFTERNOON TO EVENING HOURS  
IN THE TRINITY HORN REGION BOTH SATURDAY AND SUNDAY WITH CHANCES  
SIGNIFICANTLY LESS ON SUNDAY.  
 
LATE THIS WEEKEND AND INTO THE MIDDLE OF NEXT WEEK, HIGH PRESSURE  
IS EXPECTED TO GENERALLY REMAIN EAST OF THE AREA. THIS WILL KEEP  
TEMPERATURES NEAR SEASONAL NORMALS WITH HIGHS IN THE UPPER 80S TO  
LOW 90S. COASTAL STRATUS IS EXPECTED TO FORM EACH NIGHT DURING  
THIS TIME WITH THE POTENTIAL FOR SOME CLEARING INTO THE  
AFTERNOONS. THUNDER POTENTIAL GENERALLY LOOKS TO REMAIN LOW.  
ENSEMBLES ARE HINTING AT ANOTHER UPPER-LOW FORMING RIGHT OFF THE  
COAST, WHICH MAY RETURN THUNDERSTORM CHANCES BY MID NEXT WEEK.  
THIS THUNDERSTORM POTENTIAL WILL BE MONITORED.  
 
 
   
AVIATION  
EXTENSIVE STRATUS OFFSHORE OVER THE OCEAN WILL LIKELY  
KEEP COASTAL TERMINALS UNDER IFR TO LIFR CONDITIONS THROUGH THE  
MORNING HOURS. CONFIDENCE IN COMPLETE AFTERNOON CLEARING IS LOW.  
LOW CLOUDS AND IFR CEILINGS WILL PROBABLY PERSIST NEAR OR OVER  
COASTAL AERODROMES. SOME SCATTERING OUT MAY EVENTUALLY OCCUR LATE IN  
THE DAY, HOWEVER STRATUS AND IFR CONDITIONS WILL PROBABLY BUILD BACK  
QUICKLY DURING THE EVENING HOURS, SO ANY IMPROVEMENT IS PROBABLY  
GOING TO BE BRIEF.  
 
VFR CONDITIONS ARE EXPECTED TO CONTINUE OVER THE INLAND AREAS WITH  
WRAP AROUND MID TO HIGH LEVEL CONVECTIVE DEBRIS CLOUDS THROUGH EARLY  
SATURDAY. OTHERWISE, CUMULUS IS FORECAST TO BUILD AGAIN DURING THE  
DAY WITH LIGHT TO MODERATE TURBULENCE NEAR CONVECTIVE CELLS. ALSO,  
LOW LEVEL CLOUDS AND IFR CONDITIONS WILL BE POSSIBLE FOR THE COASTAL  
VALLEYS SATURDAY MORNING. RECENT RAINFALL IN THE VALLEYS OF TRINITY  
COUNTY MAY RESULT IN BRIEF LIFR DUE TO EARLY MORNING FOG.  
 
 
   
MARINE  
A WEAK PRESSURE GRADIENT BETWEEN AN OFFSHORE RIDGE AND  
AN INLAND TROUGH WILL KEEP WINDS GENTLE TO MODERATE THROUGH THE  
WEEKEND. NORTHERLIES WILL ACCELERATE AROUND CAPE MENDOCINO AND  
RESULT IN A NARROW BAND OF GUSTS AROUND 30 KT THROUGH SATURDAY. SEAS  
AROUND 3 TO 5 FEET ARE EXPECTED, WITH THE LOWEST WAVES EXPECTED  
NEAREST THE COAST. THE SEA STATE WILL BE DOMINATED BY 2 TO 5 FOOT  
WIND WAVES AND A SMALL LONG PERIOD SOUTHERLY SWELL. NORTHERLY WINDS  
ARE FORECAST TO INCREASE EARLY TO MID NEXT WEEK, STRONGEST OVER THE  
OUTER WATERS AND IN THE LEE OF CAPE MENDOCINO.  
 
 
   
EKA WATCHES/WARNINGS/ADVISORIES  
 
CA...  
NONE.  
NORTHWEST CALIFORNIA COASTAL WATERS...  
NONE.  
 
 
 
 
NOTE: THE FULL FORECAST DISCUSSION IS NOW REGULARLY ISSUED BETWEEN  
10 AM/PM AND 1 PM/AM. ADDITIONAL UPDATES WILL BE ISSUED AS NEEDED.  
 
VISIT US AT HTTPS://WWW.WEATHER.GOV/EUREKA  
 
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FOR FORECAST ZONE INFORMATION  
SEE THE FORECAST ZONE MAP ONLINE:  
HTTPS://WWW.WEATHER.GOV/IMAGES/EKA/ZONEMAP.PNG  
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