This is the forecast for the foothills of the Northern Blue Mountains of Oregon, including the cities of Athena, Pendleton, and Pilot Rock issued from KPDT at 3:58 AM on May 17, 2017:
Today will be mostly cloudy. Scattered showers in the morning, then isolated showers in the afternoon. Highs 56° to 61°. West wind 10 to 15 mph. Chance of precipitation 50 percent. Tonight will be mostly cloudy with a 20 percent chance of showers in the evening, then partly cloudy overnight. Lows 41° to 46°. Southwest wind 10 to 15 mph. Tomorrow will be mostly cloudy in the morning then becoming partly cloudy. Highs 64° to 69°. Southwest wind 5 to 10 mph shifting to the west in the afternoon.
Today through Friday, an upper level low in southern Idaho will move southeast today. Wrap around moisture from the upper level low will keep a chance of rain or snow showers from Central Oregon to the northeastern mountains this morning. Snow levels will be 3,000-3,500 feet this morning. There will be accumulating snow above 3,500 feet in the southern Blue Mountains, the Ochoco John Day Highlands, and Wallowa County. A late season Winter Weather Advisory has been issued for these areas above 3,500 feet (4,000 feet Wallowa County). The showers will gradually decrease from west to east through the day. Tonight and Thursday an upper level ridge located offshore will build into Washington and Oregon behind the departing low. A weak disturbance moving riding over the ridge Thursday may have enough energy to trigger a few light showers from the Blue Mountains eastward. By Friday the ridge will build inland with dry and warmer weather. Temperatures will begin to climb each day eventually getting back to seasonal normals Thursday and Friday.
Regional Weather Observations:
Pendleton Airport: Cloudy, temperature 45°, dewpoint 40°, relative humidity 82%, west wind 12 mph, air pressure 29.95 inches, wind chill 39°.
Adams: Temperature 42°, dewpoint 39°, relative humidity 89%, west wind 2 mph, air pressure 29.96 inches rising.
Athena: Temperature 41°, dewpoint 38°, relative humidity 89%, calm, air pressure 29.99 inches rising.
Helix: Temperature 40°, dewpoint 38°, relative humidity 92%,southwest wind 9 mph, air pressure 29.91 inches rising.
Milton-Freewater: Temperature 43°, dewpoint 38°, relative humidity 82%, south wind 6 mph, air pressure 29.95 inches rising.
Pilot Rock: Temperature 45°, dewpoint 38°, relative humidity 76%, west wind 6 mph, air pressure 29.97 inches rising.
Tutuilla: Temperature 44°, dewpoint 40°, relative humidity 86%, calm, air pressure 29.97 inches rising.
Umapine: Temperature 46°, dewpoint 40°, relative humidity 79%, southwest wind 1 mph, air pressure 29.92 inches rising.
Weston School: Temperature 40°, dewpoint 36°, relative humidity 85%, southwest wind 6 mph, air pressure 29.93 inches rising.