This is the forecast for the foothills of the Northern Blue Mountains of Oregon, including the cities of Athena, Pendleton, and Pilot Rock issued at 7:50 AM on May 15, 2017:
Today will be mostly sunny. Highs 61° to 66°. Southwest wind 5 to 10 mph. Tonight will have rain overnight. Lows 44° to 49°. Southwest wind 5 to 10 mph. Chance of precipitation near 100 percent. Tomorrow will have rain in the morning, then showers likely and a slight chance of thunderstorms in the afternoon. Breezy. Some thunderstorms may produce small hail in the afternoon. Highs 52° to 57°. South wind 10 to 15 mph shifting to the west 15 to 25 mph in the afternoon. Chance of precipitation near 100 percent.
Today through Tuesday, the remnants of the upper level trough over the region will produce some cumulus clouds over the eastern mountains during the afternoon with a few possible showers. Meanwhile, the next weather system is a closed upper level low moving down the Canadian coast that will push a cold front across the forecast area overnight through early Tuesday. Expect some quarter inch precipitation amounts around the Columbia Basin and then up to three quarters of an inch in the mountains from the passing cold front. The upper level low will then pass over the forecast area on Tuesday turning precipitation to showers with some possible thunderstorms.
Regional Weather Observations:
Pendleton Airport: Mostly sunny, temperature 46°, dewpoint 38°, relative humidity 73%, southeast wind 5 mph, air pressure 29.97″Hg steady.
Adams: Mostly sunny, temperature 46°, dewpoint 40°, relative humidity 79%, southwest wind 2 mph, air pressure 29.98″Hg steady.
Athena: Mostly sunny, temperature 49°, dewpoint 38°, relative humidity 66%, wind calm, air pressure 30.00″Hg steady.
Helix: Mostly sunny, temperature 46°, dewpoint 38°, relative humidity 73%, southwest wind 12 mph, air pressure 29.93″Hg steady, wind chill 40°.
Milton-Freewater: Mostly sunny, temperature 50°, dewpoint 39°, relative humidity 66%, west wind 3 mph, air pressure 29.97″Hg steady.
Pilot Rock: Mostly sunny, temperature 49°, dewpoint 40°, relative humidity 71%, southwest wind 2 mph, air pressure 29.98″Hg falling.
Tutuilla: Mostly sunny, temperature 49°, dewpoint 42°, relative humidity 77%, south wind 1 mph, air pressure 30.00″Hg rising.
Umapine: Mostly sunny, temperature 52°, dewpoint 41°, relative humidity 66%, southwest wind 2 mph, air pressure 29.96″Hg steady.
Weston: Mostly sunny, temperature 47°, dewpoint 34°, relative humidity 60%, west wind 8 mph, air pressure 29.96″Hg rising.