Area Forecast Discussion
Issued by NWS Eureka, CA
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Issued by NWS Eureka, CA
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-- Discussion containing changed information from previous version are highlighted. --631 FXUS66 KEKA 252130 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 230 PM PDT Sat May 25 2024 .SYNOPSIS...-- Changed Discussion --Cooler than normal temperatures continue across the interior today. Warming temperatures inland and coastal stratus continues this weekend.-- End Changed Discussion --&& .DISCUSSION...-- Changed Discussion --Residual cloudiness is expected to continue to diminish this afternoon as a trough moves out and a ridge begins to build in. Gusty NNW winds will ease this evening. The building ridge with light winds and clear skies will cool temperatures inland to the 40s, with mid-to-high 30s possible in the colder valleys of Trinity County. Coastal stratus is expected to build back in tonight as the ridge builds in. Widespread stratus making it`s way far inland is not expected tonight, and will likely remain restrained to the Humboldt and Mendocino coasts. The probability for low ceilings is lower for the Del Norte coast, around 20%. Temperatures inland will warm Sunday into early next week as the ridge builds in, with mid 80s likely by Monday. Warm temperatures aloft will increase the marine inversion, keeping stratus along the coast. SREF and NAM are highlighting thunderstorm potential inland on Monday. NBM is showing less than a 10% probability of thunder, however. As of now, model soundings are showing a lack of mid-level moisture that would promote thunderstorm development, but this is something that would need to be watched in case conditions worsen. A trough arriving Tuesday morning brings the potential for more widespread cloud cover and coastal drizzle, once again. Temperatures will cool inland to the 70s Tuesday and Wednesday before a ridge builds back in. This ridge will warm temperatures again inland, with around a 50% chance to hit 90 degrees in most the warmer interior valleys Friday. JB-- End Changed Discussion --&& .AVIATION...-- Changed Discussion --VFR has prevailed since late this morning at all terminals, while some slowly eroding mid cloud lingers in interior Del Norte and Humboldt. Low cloud is expected to redevelop late this evening and overnight along the Redwood and Mendo coast, although categories are not forecast to dip as low as last night...with most guidance indicating categories remaining primarily IFR. Though the modeled probability for fog over the terminals is low into Sunday morning, the ample surface moisture deposited from the rather aggressive drizzle may be enough for another round of fog and LIFR ceilings. Otherwise VFR will prevail after the mid cloud erodes this evening across the interior.-- End Changed Discussion --&& .MARINE...-- Changed Discussion --Northerlies have again become more focused in the southern zones where 20 to 25 kt winds have been forecast to develop. Short period seas will locally build and propagate in from the north. The winds and short period seas of 6 to 8 feet warranted Small Craft Advisory coverage in the southern, as well as portions of the northern zones. The Advisory in the Southern Outer waters continues through Sunday for lingering winds and seas. A 3 to 5 ft NW swell at 8 seconds will also enter the waters through the weekend. A mid period NW swell at around 5 ft at 13 seconds from a late season Pacific trough of low pressure will also arrive on Tuesday. The northerly winds will remain stronger in the southern zones, up to 25 kts into early next week, with lighter northerlies elsewhere.-- End Changed Discussion --&& .EKA WATCHES/WARNINGS/ADVISORIES...-- Changed Discussion --CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 9 AM PDT Sunday for PZZ455-470. Small Craft Advisory until 11 PM PDT Sunday for PZZ475.-- End Changed Discussion --&& $$ 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