FXUS66 KEKA 062208 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 308 PM PDT Wed May 6 2026 .SYNOPSIS...Weak high pressure building into the area will gradually warm inland temperatures through Thursday. Closer to the coast widespread low clouds will linger keeping temperatures cooler. Friday will see slightly cooler temperatures and more clouds. For the weekend and into early next highs are expected to warm each day with many inland areas seeing the 90s by Monday. && KEY MESSAGES: Near to above normal inland temperatures Thursday with some cooling Friday. Breezy north winds this weekend with well above normal temperatures inland. Minor to moderate heat risk is possible on Monday in Mendocino, Lake and Trinity counties. .DISCUSSION...High pressure is building over the area in the wake of a departing low. This will bring clearing skies and warming temperatures for much of the interior. Stratus has retreated to the usual coastal areas of Humboldt, Del Norte and Mendocino counties and will return with less coverage overnight into Thursday morning than previous past few days. Though HREF does have a less vigorous low level cloud cover Thursday afternoon, stratus is expected to straddle the coastline and will linger around Humboldt Bay and the coastline up to the Oregon border. Thursday night into Friday a weak front will bring some mid level clouds and cooler temperatures to Trinity county. This may bring some drizzle to the coast, but at this point no real rain is expected. Friday night into Saturday northerly winds are expected to increase. Offshore flow is expected overnight with breezy afternoon winds. Inland areas are expected to warm again on Saturday and with mostly clear skies areas closer to the coast will likely warm up too. The breezy northerly winds typically keep the immediate coast in the low 60s. The warming trend is expected to continue into early next week. At this point the first day expected to see moderate heat risk in the far inland areas is Monday. However, there is some potential an upper low could develop off the coast weaken the wind flow allowing clouds and marine air creep into the coastal counties limiting the heating potential. MKK/EYS && .AVIATION...The marine layer remains deep and embedded along the coast and farther inland. The MVFR ceilings from this layer will once again lower with overnight cooling, with high confidence for IFR levels. With building high pressure, and additional compressional effects, LIFR levels are possible. Guidance is trending with higher probabilities for this scenario. Probabilities for LIFR are at this time 20-30%, but MOS guidance is latching on to lower ceilings. && .MARINE...Northerly winds increase some today, to around 15-17 kts, mainly in the southern waters around the cape. Similar conditions will continue Thursday, with short period seas of 3 to 5 feet and some small mid period swells. Thursday night into Friday a weak front approaching the area is expected to bring lighter winds north of Cape Mendocino. Only around 5 to 10 kt and these may briefly become west or southwest. Farther south the winds are expected to increase to around 15 to 20 kt. Behind the front on the weekend winds are expected to increase to near gale or gale force as high pressure builds in again. There is expected to be a fairly small northwest swell through much of the period. Friday night and Saturday behind the weak front the swell may increase slightly with periods jumping up to around 15 seconds, but heights remain around 3 or 4 feet. MKK/JJW && .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 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