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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Wednesday
• 
• High: 54 °
• Low: 46 °
• Rain Showers

• Thursday
• 
• High: 59 °
• Low: 48 °
• Rain Showers

• Friday
• 
• High: 59 °
• Low: 46 °
• Rain Showers

• Saturday
• 
• High: 59 °
• Low: 50 °
• Chance of Rain

• Sunday
• 
• High: 61 °
• Low: 50 °
• Chance of Rain

Area forecast discussion 
National Weather Service Medford or 
305 am PDT Wednesday may 22 2013 


Discussion...the upper low that brought much cooler 
temperatures...rain and mountain snow showers including some 
accumulating snow near Crater Lake and Diamond Lake yesterday will 
linger over the forecast area for the next couple of days. The upper 
low will weaken and move northeast Friday and Saturday. 


Plenty of cold air aloft is moving overhead as evident by the 
satellite image which shows plenty of cumulus clouds over the ocean 
and are moving southeast into southwest Oregon. Of note is some 
enhancement northwest of North Bend...so we can expect showers to 
increase over the northwest part of the forecast area early this 
morning. Snow levels start out around 2800 feet early this morning 
and could briefly drop to around 2500 feet in heavier showers. 
However due to warm Road and ground temperatures i'm expecting wet 
snow showers to melt. The exception will be around Diamond and 
Crater Lake and Lake of The Woods where a trace to an inch of slushy 
snow could accumulate prior to 8 am PDT. Anything after that should 
melt with snow levels expected to rise between 4000 and 4500 feet in 
the afternoon. 


The upper low remains overhead today with multiple shortwave 
rotating around it along with cold air aloft. Therefore we can 
expect almost a repeat of yesterday where showers will tend to 
increase from late morning through the afternoon. Some of the 
showers will bring locally gusty winds and small hail from about middle 
afternoon into early this evening. 


Showers will decrease some Wednesday night...but do not expect much 
clearing to take place west of the Cascades and temperatures will 
remain above freezing. It will be a close call in the Klamath basin. 
There is a chance for less cloud cover there and any clearing will 
allow temperatures to drop quickly. So we'll play it safe and issue 
a freeze watch for late tonight/early Thursday morning. 


The upper low lingers over the area Thursday with shower activity at 
a minimum in the morning then increasing again in the afternoon. The 
NAM and GFS show a stronger shortwave swinging into southern Oregon 
in the afternoon. This along with increasing daytime heating could 
be enough to generate isolated thunderstorms east of the Cascades 
late in the afternoon and early evening. 


Another shortwave is expected to swing into western Oregon Friday 
morning...then move northeast Friday afternoon. So we can expect 
another round of showers with a slight chance of isolated storms 
east of the Cascades Friday afternoon. -Petrucelli 




&& 


Aviation... 


Based on the 22/06z taf cycle. 


VFR conditions are expected to prevail today. However temporary MVFR 
conditions with partial mountain obscurations and reduced 
visibilities are possible near and within showers with locally 
gusty winds. 


&& 


Mfr watches/warnings/advisories... 
or...freeze watch from late tonight through Thursday morning for 
orz029. 
Freeze warning until 9 am PDT this morning for orz029. 


California...freeze watch from late tonight through Thursday morning for 
caz084. 
Freeze warning until 9 am PDT this morning for caz084. 
Freeze warning until 9 am PDT this morning for caz081. 


Pacific coastal waters...hazardous seas warning until 5 PM PDT this 
afternoon for pzz350-356. 
Hazardous seas warning until 11 PM PDT this evening for 
pzz370-376. 
Small Craft Advisory for winds until 5 PM PDT this afternoon for 
pzz370. 


$$