Weather

592 
fxus66 keka 212310 cca 
afdeka 


Area forecast discussion 
National Weather Service Eureka California 
347 PM PDT Thursday Aug 21 2008 


Synopsis...high pressure building into the region will bring drier 
and cooler conditions to the area tonight. Temperatures will begin 
to rebound over the weekend before another front moves through early 
next week. 
&& 


Short term....tonight through Sunday...current visible satellite 
imagery shows skies have cleared over a majority of the area as the 
eastern Pacific high gradually works its way back into the region. 
The only exception at this time are some lingering clouds over 
portions of Humboldt and del norte counties. Coastal locations are 
Crystal clear and the marine layer is well offshore. Tonights 
expectations are for slightly cooler temperatures and lower 
humidities inland. The marine layer will likely reform...though 
later than usual since it is so clear out right now. A ridge will 
start to build to our east on Friday...but temperatures will remain 
about the same as they were today. The ridge will strengthen on 
Saturday which will lead to a warm up into the 90s for inland 
locations. Sunday will be much of the same. Another front looks like 
it will move through Sunday night into Monday...bringing the chance 
of rain and cooler temperatures. MS 


Long term...Sunday night through Thursday...models remain in good 
agreement depicting a weak trough moving into Pacific northwest Monday. Although 
most energy from this system will remain north will mention schc rain/dz 
for the Redwood coast and north coast interior. Temperatures will moderate 
by early next week as heights lower across the Pacific northwest in response to 
the passing trough. Models solutions continue to diverge 
significantly by the middle of the week with GFS showing a mean 
trough over the Pacific northwest. Meanwhile...the European model (ecmwf) maintains a more zonal 
flow across the eastern Pacific. Ensemble mean and Canadian trend more 
towards European model (ecmwf) so will continue to trend towards it. British Columbia 
&& 


Aviation...weak subsidence behind the cold frontal passage this 
morning in addition to increasing northwesterly winds has cleared 
out the clouds from the immediate coast and banked them up against 
the immediate coastal hills. Visible satellite shows an extensive 
bank of low clouds that have been sitting offshore throughout the 
day. Expect this bank to gradually reach coastal locations later 
this evening. This will be in addition to locally developing LIFR 
ceilings/visibilities once winds decouple later tonight. Expect a return to a 
more typical summertime pattern on Friday with morning low clouds 
and fog and partial clearing in the afternoon. Inland locations will 
see MVFR stratocu on ridgetops abating as the sun sets. These areas 
will also see the development of valley LIFR fog during the 
overnight hours. Alm 
&& 


Marine...all area buoys are reporting advisory level seas this 
afternoon with buoy #22 the highest at 11-12ft. Periods remain 
relatively long at 12 to 13 seconds for most locations. Expect to 
see these sea heights continue through the overnight hours and 
gradually subside Friday morning below advisory levels. As the swell 
begins to subside...northerly winds are expected to increase to 
advisory levels over the offshore waters late tonight. This will 
lead to a continuation of advisory conditions in the offshore waters 
as the sea state becomes more turbulent with wind waves and short 
period fresh swell. Winds and seas will begin to subside late in the 
weekend as another front approaches the region. Alm 
&& 


Eka watches/warnings/advisories... 
Small Craft Advisory until Friday afternoon pzz450-455-470-475. 
&& 


$$ 


Visit US at http://www.Weather.Gov/Eureka