102  
FXUS66 KEKA 060618  
AFDEKA  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE EUREKA CA  
1118 PM PDT SUN OCT 5 2025  
   
SYNOPSIS
 
MUCH WARMER THAN NORMAL CONDITIONS WILL CONTINUE MONDAY  
ESPECIALLY ALONG THE COAST WHERE HIGHS COULD REACH THE MID 70S. MORE  
MARINE INFLUENCE WILL GRADUALLY RETURN THROUGH THE WEEK WITH LIGHT  
RAIN POTENTIAL BY THIS WEEKEND.  
 

 
   
DISCUSSION
 
OVER THE PAST 24 HOURS, BROAD HIGH  
PRESSURE HAS GENERALLY COME TO DOMINATE OVER THE AREA. THIS HAS  
ALLOWED FOR CLEAR SKIES AND WARMER THAN NORMAL TEMPERATURES TO  
RETURN TO THE INTERIOR SUCH CONDITIONS WILL CONTINUE MONDAY WITH  
HIGHS MOST LIKELY IN THE MID 80S FOR MANY INTERIOR VALLEYS. A CUTOFF  
LOW OFF THE CENTRAL CALIFORNIA COAST WILL PROMOTE GENERALLY OFFSHORE  
WIND, HELPING BRING WARM TEMPERATURES EVEN TO THE IMMEDIATE COAST.  
HIGHS WILL MOST LIKELY HIT THE MID 70S MONDAY AFTERNOON EVEN IN  
EUREKA AND CRESCENT CITY.  
 
A WEAK TROUGH WILL GRADUALLY DIP ACROSS THE EASTERN PACIFIC THROUGH  
THE WEEK. AS EARLY AS TUESDAY, THIS WILL TURN WIND BACK ONSHORE,  
BRINGING A COOL, DIURNAL MARINE LAYER BACK TO THE COAST. BY  
WEDNESDAY, THIS TROUGH WILL HELP BREAK HIGH PRESSURE IN THE INTERIOR  
AND GENERALLY COOL CONDITIONS BACK INTO THE MID AND UPPER 70S.  
 
THE TROUGH MOVING ONSHORE LATE IN THE WEEK WILL BRING THE POTENTIAL  
FOR LIGHT RAIN, ESPECIALLY FOR THE IMMEDIATE NORTH COAST. EXACT RAIN  
AMOUNTS ARE VERY UNCERTAIN, BUT GENERALLY SKEW TOWARDS THE LOW END.  
MOST DETERMINISTIC MODELS SHOW THE TROUGH PULLING UP ONLY VERY MINOR  
MOISTURE FORM THE SOUTH WITH PRECIPITABLE WATER STRUGGLING TO GET  
MUCH OVER 0.8 INCHES AT MOST. NBM HAS ONLY A 50 TO 60% CHANCE OF  
LIGHT WETTING RAIN ALONG THE COAST BETWEEN FRIDAY AND SATURDAY.  
THERE DO REMAIN, HOWEVER, A FEW HIGHER END SOLUTIONS THAT SHOW RAIN  
OVER 1 INCH BUT ALSO A LARGE NUMBER OF SOLUTION (40%) WHICH SHOW  
ESSENTIALLY NO RAIN. REGARDLESS OF RAIN AMOUNTS, CONDITIONS WILL BE  
COOLER AND MORE MOIST WITH THICK MIDLEVEL CLOUDS. COLD AIR ON THE  
BACK END OF THE TROUGH COMBINED WITH INCREASINGLY SHORT DAYS WILL  
LIKELY BRING SOME OF THE FIRST CHANCES OF FROST BY THE END OF THE  
WEEKEND. /JHW  
 

 
   
AVIATION...(6Z TAFS)
 
FEW CLOUDS ARE VISIBLE ON SATELLITE  
TONIGHT, WITH STRATUS ONLY VISIBLE OFF THE MENDOCINO COAST.  
OCCASIONALLY LOW VISIBILITIES HAVE BEEN OBSERVED AT CEC, LIKELY IN  
THE FORM OF HAZE OR GROUND FOG, WITH MINIMAL IMPACTS EXPECTED.  
OFFSHORE FLOW ALOFT IS LIKELY TO KEEP SKIES MOSTLY CLEAR TONIGHT,  
WITH LOW PROBABILITIES FOR ANY STRATUS FORMATION. WINDS ARE  
FORECAST TO BE LIGHT ACROSS THE AREA FOR THE NEXT 24 HOURS. JB  
 

 
   
MARINE
 
NORTHERLY WINDS AND STEEP WIND WAVES CONTINUE TO EASE.  
STEEP WIND WAVES WILL DIP BELOW 7 FT BY MONDAY AFTERNOON. LIGHT  
WINDS ARE FORECAST TO CONTINUE THROUGH THE DAY MONDAY, BUT SOME  
ISOLATED SPOTS OF BREEZY EAST WIND ARE POSSIBLE NEARSHORE IN  
CHANNELED TERRAIN. NORTHERLY WINDS WILL THEN BEGIN TRENDING STRONGER  
TUESDAY NIGHT THROUGH WEDNESDAY. THERE IS CURRENTLY A LOW CHANCE  
(25%) FOR WIND GUSTS OVER 30KT FOR THE OUTER WATERS ON WEDNESDAY,  
BUT THESE WINDS MAY BE STRONG ENOUGH TO BE HAZARDOUS TO SMALL  
CRAFTS. JB/JJW  
 

 
   
EKA WATCHES/WARNINGS/ADVISORIES
 
 
CA...  
NONE.  
NORTHWEST CALIFORNIA COASTAL WATERS...  
SMALL CRAFT ADVISORY UNTIL 9 AM PDT MONDAY FOR PZZ470-475.  
 

 
 

 
 
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  
 
FOLLOW US ON FACEBOOK AND TWITTER AT:  
HTTPS://WWW.FACEBOOK.COM/NWSEUREKA  
HTTPS://WWW.TWITTER.COM/NWSEUREKA  
 
FOR FORECAST ZONE INFORMATION  
SEE THE FORECAST ZONE MAP ONLINE:  
HTTPS://WWW.WEATHER.GOV/IMAGES/EKA/ZONEMAP.PNG  
 
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