133 FXUS66 KEKA 112233 AFDEKA AREA FORECAST DISCUSSION National Weather Service Eureka CA 333 PM PDT Tue Aug 11 2020 .SYNOPSIS...Warm, dry conditions will continue through Friday across interior areas. Overnight clouds and fog will dissipate during the late morning along the coast, leaving sunny skies and mild temperatures during the afternoon. A warming trend is expected Friday through the weekend, with a slight chance of thunderstorms over the weekend. && .DISCUSSION...Benign summertime conditions continue throughout the region today, with sunny skies and warm temperatures across inland areas, and stubborn shallow marine clouds along the immediate coast. While temperatures may be a few degrees lower than they were yesterday at this time across interior valleys, it is hardly noticeable as they have nonetheless climbed well into the 90s to near 100 degrees in some places. This slight moderating trend will continue Wednesday and Thursday, although afternoon temperatures will continue to reach near seasonal averages each day. Skies will also continue to be mostly clear through Friday across inland areas. Temperatures will begin a warming trend Friday, likely climbing back to between 95 and 105 throughout interior low elevations. Along the coast, a very shallow marine layer is expected to persist through the end of the week. As such, shallow stratus clouds and fog are expected to only reach between 500-1000 feet in elevation along the immediate coast, with local visibility reductions due to fog possible all the way down to sea level. This will occur during the overnight and morning periods tonight through potentially Thursday night, with a relatively quick burnoff expected during the morning. Much drier air is expected to move through the area early Friday, which should help to scour out these clouds almost completely. This may also result in slightly warmer temperatures in coastal communities as well. On Saturday, a weak disturbance moving in from the southwest may bring enhanced moisture, lift, and instability to the area, with the potential to produce afternoon thunderstorms. Uncertainty remains very high at this stage, but have introduced slight chances for thunderstorms across primarily the interior mountainous areas along and east of South Fork Ridge. Otherwise, slightly above normal temperatures will also continue Saturday and Sunday, with a slight retreat back to near seasonal averages Monday and beyond. Additional opportunities for thunderstorms appear possible early next week, but probabilities remain too low to include in the official forecast at this time. /BRC && .AVIATION...Widespread stratus and fog blanked the coastal waters and adjacent land areas this morning. This cloudiness eroded fairly quickly on the inland edge, but periods of onshore flow kept the immediate coastal areas BKN-OVC. Clouds N of Cape Mendocino have also eroded on their W flank as gusty northerlies continue. Low clouds are more expansive over the coastal waters S of Cape Mendocino. The ACV profiler indicates the marine layer has deepened to over 3000 ft through the day, with the Bodega Bay profiler indicating a marine layer a bit shallower (a shade below 3000 ft). Expecting similar conditions tonight with an expansion of stratus and fog along the coast. A brief ceiling advected into KUKI from the S this morning, and the HRRR hints that this might be a bit more likely Wednesday morning. Winds will be generally light over land. /SEC && .MARINE...Northerly winds will continue to gradually diminish overnight, with the strongest winds continuing downwind from Cape Mendocino. Advisory level seas will continue through the downtick in winds until northerlies again increase Wednesday night and Thursday. As a result, have extended the Small Craft Advisory for the outer waters into Thursday night. Winds and seas may increase enough over the N outer waters to warrant a Gale Watch or Hazardous Seas Watch, but will defer this decision to the next shifts. Mid-period NW swell and long period SSW swell will gradually decay over the next couple of days. Otherwise, seas will be dominated by short period waves. /SEC && .EKA WATCHES/WARNINGS/ADVISORIES... CA...None. NORTHWEST CALIFORNIA COASTAL WATERS...Small Craft Advisory until 1 AM PDT Friday for PZZ470-475. && $$ 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