textproduct: Eureka

SYNOPSIS

Interior temperatures forecast to diminish each day through Friday. Coastal stratus coverage becoming less through the week with clear skies possible Friday afternoon. Stronger winds are to be expected through the rest of the week into the weekend.

DISCUSSION

Key Messages: * Interior heat risk diminishing and becoming low for the remainder of this week.

* Gustier westerly and northwesterly breezes in the interior valleys each afternoon and evening Wednesday through Saturday.

* Strengthening coastal northerlies mid to late week.

An upper upper level trough swings over our area from the north through the rest of the week. This synoptic weather will bring a general cooldown to our temperatures through the weekend. Inland valleys will struggle to break 90F on Wednesday through the rest of the week and weekend. High tempertures look to be around the low 80s at the warmest for inland valleys Friday and Saturday as of right now. This comes a relief after what has been a warm couple of weeks to start meteorological summer. These cooler temperatures will also be accompanied by stronger winds with afternoon wind gusts around 15- 20mph in the later portion of the week.

This week, an upper level trough will impact the PacNW with possible rain. While most of the rain potential lies be out of our area and focused mostly in Oregon and Washington, there is a low, 10-20% chance that Del Norte and Northern Humboldt could receive some precipitation accumulation over 0.02" of rain through Monday. While these numbers are not astonishing, this is a notable change in weather compared to our typical summer pattern.

AVIATION

A persistent marine layer has continued to blanket the coast, though a robust upper level short wave approaching the coast has helped lift ceilings to generally IFR conditions with good visibility at the surface. Light drizzle is likely throughout the night with some sporadic drops to LIFR visibilities in the early morning hours. Ceilings will most likely gradually break through the day Wednesday with at least some period of VFR conditions (60% chance) all along the coast in the late afternoon. Otherwise VFR conditions will persist for the interior. /JHW

MARINE

Winds will continue to gradually increase across the outer waters through the work week. Locally near gale to gale force wind gusts are forecast to develop leeward of Cape Mendocino Wednesday afternoon. Widespread fresh to strong northerly breezes with some near gale force gusts downwind of Cape Mendocino begins on Thursday and then continues into the weekend as the high pressure stalls over the eastern Pacific and the pressure gradient tightens up along the coast.

Mid period northwest swell will continue to dominate the sea state through mid week. In addition, a long period southwest swell of 3-4 feet at 17 seconds will slowly subside through Thursday. This could present a small sneaker wave threat on south facing beaches if it ends up coming in this big. Wind driven seas are expected to increase on Thursday and Friday.

EKA WATCHES/WARNINGS/ADVISORIES

CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory from 9 AM Wednesday to 11 PM PDT Thursday for PZZ455.

Small Craft Advisory from 3 AM to 3 PM PDT Wednesday for PZZ470.

Small Craft Advisory until 11 PM PDT Thursday for PZZ475.