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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Tuesday
• 
• High: 71 °
• Low: 48 °
• Chance of T-Storms

• Wednesday
• 
• High: 66 °
• Low: 45 °
• Chance of Rain

• Thursday
• 
• High: 77 °
• Low: 48 °
• Partly Cloudy

• Friday
• 
• High: 84 °
• Low: 50 °
• Partly Cloudy

• Saturday
• 
• High: 88 °
• Low: 55 °
• Partly Cloudy

Area forecast discussion 
National Weather Service Medford or 
250 PM PDT Tuesday Jun 18 2013 


Short term...the upper level low pressure off northwest Oregon coast 
will continue to spend a series of weak disturbance inland tonight 
and Wednesday. Cool and unstable air mass will help to 
destabilize the atmosphere with intermittent light rain showers. 
Thunderstorms are possible this evening..mainly from the Cascades 
east and south into Siskiyou and Modoc counties. Instability 
indices are not very high and lightning strikes are expected to be 
isolated in coverage. Expect cooler than normal temperatures on 
Wednesday as more cooler air moves into the area along with 
potential for showers. Only northern Klamath and lake counties 
will have enough instability for lightning strikes. Some clearing 
on Wednesday night could bring temperatures in the Klamath and 
Tulelake basins down close to frost points. 


The low pressure is expected to move into NE Oregon and eastern 
Washington on Thursday but lingers in that general area through 
Friday. We will see some warming and drying Thursday and Friday 
the cold air moves east. However there is a concern that moisture 
rotating around the low pressure could lead to upslope showers in 
the far eastern Douglas County and northern Klamath and lake 
counties through Friday whereas the chance for the rest of our 
forecast area should be over. 


Long term...expect brief ridging on Saturday with highs warming 
to normal...possibly into Sunday. While both long range models 
hint that another low pressure move inland...they are beginning to 
diverge a bit from Sunday into early next week. The European model (ecmwf) is more 
aggressive with a full fledged cold front inland whereas the GFS 
has a weaker trough moving through. This will affect forecast 
highs next week. Decided to stay closer to the GFS on temperatures 
keeping highs close to but just below seasonal norms from Sunday 
into next week. Also introduced precipitation to the extended 
forecast. /Fb 




&& 


Aviation...an upper low will move over the area tonight into 
Wednesday. This will result in showers, most numerous in Oregon. 
There can be isolated lightning too, especially over interior 
Oregon this evening, then again over the east side Wednesday 
afternoon. Gusty winds in the Rogue Valley and over the east side 
this evening will diminish overnight. Ceilings will remain mostly a 
mix of VFR and MVFR, with the lowest ceilings in the vicinity of 
showers. Areas of IFR will persist at the Curry coast. Spilde 




&& 


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


California...none. 


Pacific coastal waters...none. 


$$ 


Fjb/fjb/mas