Area Forecast Discussion
Issued by NWS Eureka, CA
Issued by NWS Eureka, CA
678 FXUS66 KEKA 102228 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 328 PM PDT Fri May 10 2024 .SYNOPSIS...Dry weather and above normal temperatures through Saturday. A shortwave trough will bring a cooling trend Sunday and early this week, with some coastal drizzle. Followed by more dry weather and warmer temperatures returning for the middle of the week. && .DISCUSSION...A 1024 mb upper level ridge centered over the NEPAC remain in control of the NorCal weather into the weekend. This features is promoting abundant sunshine due to a large scale subsidence and light to locally breezy offshore flow this afternoon. The offshore flow brought the warmest day of the week for the coast, with surface observations reporting temperatures mostly in the 70`s into mid 80`s. Daytime inland temperatures has been running 4 to 10 degrees warmer than yesterday`s reading, with highs mostly in the 80`s. The ASOS in Ukiah Municipal Airport reported 90F this afternoon. Late tonight into Saturday, the upper level ridge is forecast to begin to flatten as an upper level trough approaches the Pacific NW. NBM and HREF continue indicating stratus developing south of Cape Mendocino. However, confidence is low due to a persistent large scale subsidence from the dominating ridge. However, despite this, the flow will become more zonal and temperatures will likely cool at and near the coast, while still remaining mostly in the lower 60s. Farther inland, temperatures are forecast to run few degrees warmer than today`s reading. Saturday night and into Sunday, a trough will move closer to the area ushering in a deeper and more widespread marine layer by Sunday morning. Drizzle may occur along the coast, as a result. Temperature-wise, inland areas are expected to drop into the low to mid 80s. A shower or two is possible over the higher terrain of eastern Trinity County. Thunder potential remains mostly around a 5 to 10 percent chance so it is not represented in the forecast, with the highest probability over the Sacramento valley. Into the early to middle of next week, high pressure is expected to build back in with inland temperatures warming back into the upper 80s and low 90s and coastal temperatures into the mid to upper 60s. Breezy north winds are expected, along with the potential for offshore flow. And, again, the offshore flow will help keep the coast clearer for the middle of the week. && .AVIATION...MVFR haze developed briefly along the coast this morning; at the coast pockets of haze will continued into afternoon. Otherwise, mostly optimal aviation weather conditions prevailed across the region today. Overnight/Saturday morning, some model outputs are indicating a change along the North Coast: pockets of thin layer fog and stratus Cigs to develop at the coast...especially around Humboldt Bay and briefly at ACV. /TAA && .MARINE...Winds remain mostly northerly through the weekend, weakening overnight and restrengthening to around 10 to 15 kts each afternoon. Northerlies are forecast to strengthen once again late this weekend and early next week, with another round of gales possible around Tuesday. A few small NW and S swells move through the waters over the next week, however seas remain primarily locally generated. && .EKA WATCHES/WARNINGS/ADVISORIES... CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... None. && $$ 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