textproduct: Eureka

KEY MESSAGES

* Unseasonably hot temperatures with near record highs continue to generate Moderate HeatRisk across the interior through mid week.

* A shallow marine layer will bring chances of morning coastal fog for much of the week.

* Dry conditions expected through this coming work week.

SYNOPSIS

An upper level ridge over the four corners continues to influence our area this week and will create unseasonably hot and dry conditions for the interior.

DISCUSSION

A strong area of high pressure has built over the four corners and is bringing hot weather to the interior areas. Thicker than anticipated cloud cover on Sunday kept temperatures from warming quite as much, but this cloud cover is expected to move out of the area today bringing a mostly clear today outside of the coastal areas. Near-record high temperatures are expected with most interior areas seeing highs in the 90s to just over 100. High elevation areas above the thermal belt are likely to remain warm (mid 60s and 70s) through the night with valley lows in the 50s to the low 60s. Light terrain-driven winds are expected due to a stable atmosphere and minimal forcing. Coastal areas can expect continued overcast conditions with areas of dense fog and light drizzle in the mornings. Stratus may struggle to scatter along the Humboldt Coast this afternoon, but partial clearing is possible for a few hours in the afternoon outside of the immediate coastline.

This pattern is expected to continue into most of the coming week as the upper level ridge stays firmly in place. The only sign of relief seems to be next weekend. The GFS and ECMWF ensembles show an upper level trough dipping into the area sometime late Saturday into Monday morning. There is a small chance of rain returning to the area during this time, yet any details are not clear at this moment. While it is important to remember this is the far extended forecast, the possibility remains.

AVIATION...(6Z TAFs)

A shallow marine layer continues to bring LIFR stratus impacts along the coast. Low ceilings of 300 ft AGL or lower and periods of dense fog are likely through and shortly after sunrise. Some lifting and scattering is possible in the afternoon and evening, but stratus is likely to remain close to shore and bring at least occasional LIFR impacts to both coastal terminals through the afternoon. Regardless, stratus is likely to redevelop in the evening.

MARINE

North winds build again this evening bringing widespread sustained winds of 15 to 25 kts for the outer waters. Seas steepen in response to these winds bringing combined seas of 6 to 10 ft across the waters, even in the nearshore waters where winds remain much lighter. Seas remain dominated by these wind waves through the week with only small south-southwesterly mid period swells in addition to the wind waves. Winds begin to ease Tuesday night into Wednesday, especially in the southern waters, as high pressure strengthens further. Stronger northerlies return Friday into the weekend.

EKA WATCHES/WARNINGS/ADVISORIES

CA... Heat Advisory until 10 PM PDT Wednesday for CAZ110>114- 118>120.

NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 9 PM PDT Tuesday for PZZ470-475.