529 
fxus66 kmfr 240433 
afdmfr 


Area forecast discussion 
National Weather Service Medford or 
933 PM PDT Wednesday Jul 23 2008 


Discussion...no significant changes needed to the forecast this 
evening. Expect dry conditions tonight through early Friday with 
weak ridging over the area. Will also see a warming trend tomorrow 
with highs several degrees warmer than today for inland locations. 
Low clouds and patchy fog are expected to develop overnight along 
the coast north of Cape Blanco and into the Coquille Valley...with 
clearing in the middle morning. Then...Friday evening a trough 
offshore is forecast to gradually move inland. The GFS and NAM are 
indicating a slight chance for light precipitation along the Coos 
coast early Saturday with this disturbance and elsewhere dry. The 
GFS and NAM indicate that onshore flow behind this trough passage 
may bring a marine push of low clouds into Coos and Douglas 
counties Saturday night. 




&& 


Aviation...VFR conditions expected all locations tonight... 
however...marine stratus will cause a few hours of LIFR 
conditions at North Bend and other localized areas along the Coos 
and Douglas coast and into the Coquille Valley late tonight and 
early Thursday morning. 




&& 


Previous discussion... /issued 238 PM PDT Wednesday Jul 23 2008/ 


Discussion...short wave trough brought dry westerly flow aloft 
into the forecast area today. Current visible imagery showing 
little or no clouds...but areas of smoke remain across portions of 
Siskiyou and Modoc counties. A weak ridge of high pressure will 
build into the area tonight and skies will generally be clear. 
This will allow temperatures to drop off nicely and lows should be 
at least a few degrees below normal. Marine stratus not expected 
to be as widespread as last night...but some is expected to 
redevelop along the coastal waters especially from Cape Blanco 
northward and also around Brookings. 


Any marine intrusion tomorrow will give way to sunshine by middle- 
late morning along the coast and the remainder of the region will 
be sunny and dry. Expect temperatures to moderate slightly from 
today's maximums. 


Not much change is expected Friday. GFS and European model (ecmwf) showing another 
trough approaching the coast Friday night into Saturday. Expect 
much of the energy from this system to remain to our north...so 
not going to introduce any precipitation into the forecast. It may 
shave a couple of degrees off maximum temperatures...but again 
overall not much change. 


Beyond that...all indications point to a continued west-southwest 
flow aloft for the second half of the weekend and into early next 
week. This will keep dry weather in the forecast with temperatures 
near to slightly above average. 


&& 


Mfr watches/warnings/advisories... 
or...none. 


California...none. 


Pacific coastal waters...Gale Warning until 5 am PDT Thursday for 
pzz356-pzz376. 
Hazardous seas warning until 5 am PDT Thursday for pzz356-pzz376. 
Small Craft Advisory for winds until 11 PM PDT this evening for 
pzz350-pzz370. 
Small Craft Advisory for hazardous seas until 11 PM PDT this 
evening for pzz350-pzz370. 


$$ 


Cirrocumulus