textproduct: Eureka

SYNOPSIS

Generally warm conditions continue this week. Coastal drizzle is possible Saturday for Humboldt, with some light rainfall over Del Norte. More significant warming will begin late this weekend and next week.

DISCUSSION

Sunny and mild conditions for most of the CWA with the exception possibly coming overnight to Del Norte county with a standing front. This boundary is expected to weaken and drift towards Del Norte, increasing cloud cover and perhaps bringing light rain or drizzle to accumulate. The front will meander south towards Del Norte late Friday through Saturday. Recent model runs push the front south over Del Norte. Rainfall will be very light, but NBM now holds a 30-40% chance for over 0.2 inch total for Del Norte.

A dominant ridge of high pressure will also be building over the rest through the week. There is high confidence the ridge will begin to greatly amplify through the end of the weekend and next week. Near record high temperatures will be possible with some of the warmest valleys in Mendocino and southern Lake, possibly exceeding 90. By Sunday, NBM probabilities for high temperatures over 85 increase to around 40% for Mendocino and western Lake, and over 70% for southern Lake. On Monday, chances increase to above 80% for all of southern Mendocino and Lake Counties. Chances for over 90 degrees are 15 to 20% for southern locations such as Ukiah and Clearlake. Probabilities for over 90 degrees are much higher (65 to 75%) for far southern Lake County early to mid next week. These temperatures will bring some Minor level HeatRisk, with perhaps very localized Moderate levels for far southern Lake County. Most interior valleys could see temperatures in the 80s, while coastal areas could see high temperatures in the high 60s to low 70s through that period.

AVIATION...(18Z TAFs)

Low clouds have mostly lifted and scattered out of the area, bringing mostly clear skies. Coastal stratus is likely to bring MVFR ceilings to the coastal terminals this evening and overnight. Some brief IFR ceilings and lower visibilities are possible as well. The Trinity and Eel River valleys may see clouds again tonight, but otherwise interior areas are likely to remain VFR. JB

MARINE

North winds remain breezy around and south of Cape Mendocino, with peak gusts of 15 to 25 kts likely. Conditions are milder north of the Cape, with peak gusts potentially not even reaching 10 kts. The sea state is dominated by a mid period northwest swell of 6 to 8 ft at 12 seconds. This swell will be reinforced through Friday and begin to decay by Saturday. Steep northerly winds waves of 5 to 7 ft are likely south of Cape Mendocino. This pattern continues through Friday. Northerly winds increase Saturday, with gusts of 20 to 30 kts possible outside the northern inner waters by the afternoon. Sunday, winds remain breezy south of the Cape, but gradually begin to diminish north of the Cape into early next week. JB

EKA WATCHES/WARNINGS/ADVISORIES

CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 11 PM PDT Saturday for PZZ455.

Small Craft Advisory until 5 AM PDT Monday for PZZ475.