textproduct: Pendleton

KEY MESSAGES

- Breezy conditions through Friday.

- An area of low pressure will bring rain, mainly to the mountains Saturday into early Sunday.

- Dry and warmer weather for much of next week.

DISCUSSION

Westerly zonal flow will continue into Saturday. This will allow for mainly dry weather across the Pacific Northwest. However, some upper level energy could bring some rain to the Cascades later tonight.

A better chance of precipitation arrives later Friday into Saturday as an upper low and trough move southeast from British Columbia into the region. Mainly mountain precipitation is expected, though some lower elevation rain in the areas near the mountains is possible, especially Saturday afternoon and evening. Snow levels will briefly drop below 4000 feet Saturday morning before rising to around 4000 feet later Saturday, so there could even be some snow mixed in. However, little, if any accumulation is expected. There is also at least some chance of thunder in the mountains as the upper low moves through. As the low moves through, there will also be some breezy to to locally windy conditions mainly across the Cascade gaps, Columbia Basin, and Blue Mountain Foothills. Right now wind gusts look mainly in the 25 to 30 mph range, possibly as high as 40 mph. NBM probabilities for wind gusts >=39 mph are only about 50 percent across portions of the Basin and lower elsewhere.

Beyond Sunday, high pressure builds back into the area and dry and warm conditions are anticipated for much of the upcoming week.

A few hydrology notes, the Naches River at Naches is above Action Stage and is forecast to remain there until Friday morning or early afternoon. The Naches River at Cliffdell is also running high but is below Action Stage and expected to remain there. Several points on the Yakima River will experience decent in banks rises but will remain well below Action Stage.

AVIATION /00Z TAFS THROUGH 00Z SATURDAY/

VFR conditions prevail with no CIG or VIS concerns over the next 24-hours. The main weather threat will continue to be the breezy 20-30 knot gusts that will persist through most of the sites. A temporary decrease of 10-15 knots will occur in most sites, but will again increase to 20-30 knots by the mid to late morning hours of Friday.

Preliminary Point Temps/PoPs

PDT 41 64 39 59 / 0 0 10 20 ALW 45 64 43 59 / 0 0 10 60 PSC 45 68 42 65 / 0 0 0 10 YKM 39 66 36 63 / 0 0 0 10 HRI 44 66 41 63 / 0 0 0 10 ELN 36 57 32 56 / 10 0 20 0 RDM 33 65 32 54 / 0 0 10 10 LGD 39 64 38 53 / 0 0 10 60 GCD 36 67 36 54 / 0 0 0 20 DLS 46 65 43 61 / 0 0 50 20

PDT WATCHES/WARNINGS/ADVISORIES

WA...None. OR...None.