textproduct: Eureka

KEY MESSAGES

- Northerly breezes near the coastline through the weekend.

- Hotter temperatures over the holiday weekend.

SYNOPSIS

Northerly breezes will persist along the coastline through the weekend into the first half of next week. Temperatures will warm into the weekend with interior valley high temperatures in the mid to high 90s.

DISCUSSION

Synoptic scale troughing passes north of California with most of the effects over British Columbia, allowing the heat dome to fester near the four corners which is forecast to spread diurnally for the next few days during peak heat hours for the daytime hours. This will continue to aggravate fire conditions for active wildfires in Utah, Colorado, and the southwestern US. Locally we are seeing higher temperatures near the usual areas like Big Bar 100, Ruth 93, Hayfork 94, Ukiah 95. Guidance for Heatrisk are sparse and therefore products are not foreseen at this time although a heating trend is expected by Wednesday and Thursday of next week. This will primarily be focused in the North Valley areas near Redding, Red Bluff, and Chico.

Otherwise, moisture from tropical system Douglas off Baja, California will be drawn northward Sunday and Monday as the previously mentioned trough nudges down from the Pacific Northwest. The elevated moisture available for thunderstorm development still looks to stay mainly east of Trinity County through the Sacramento Valley and mid-level lapse rates are weak. This will still bear watching if higher moisture is forecast, or a farther west extent is modeled. Northeast pacific troughing will then weaken the SW high and lower temperatures some. /EYS /RPA

AVIATION

Ceilings are beginning to lift at KCEC as of 21z as well as scatter out from the persistent overcast and sub 700 foot ceilings from the morning. KACV has not faired as well with LIFR flight categories continuing through the afternoon and with MOS and GFS guidance suggesting LIFR continue into the evening with sub 300 foot ceilings although visibility is not hindered until the 13-16z hours. Southerly winds return to both terminals by 4-5z and will strengthen the idea of lower visibility and stratus. VFR conditions continue to persist at KUKI. /EYS

MARINE

Northerly winds along the coast continue just under 10 kts near the coast as a thermal trough strengthens over the interior, veering to southerly and variable in the late evening hours. Thus, small craft advisories remain in place over the outer waters zones. The gradient will tighten slightly Saturday night into Sunday and gusts to near gale will be possible in the northern outer waters for a 18-24 hour period. Otherwise, a deepening trough off the Pacific Northwest will finally disturb the pressure gradient enough that small crafts may be able to fully end early next week. /RPA

EKA WATCHES/WARNINGS/ADVISORIES

CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 9 PM PDT Sunday for PZZ470-475.