textproduct: Pendleton

KEY MESSAGES

- Showers and isolated thunderstorms along the Cascade crest Saturday.

- Breezy winds in the lower elevations through Sunday.

- Another system will bring additional shower and thunderstorm chances Monday through Wednesday.

DISCUSSION

An upper low and trough was moving onshore and will bring shower and low thunderstorm (<20 percent) chances mainly to the Cascade crest on Saturday. The trough will move east of the area on Sunday and weak ridging will move in later Sunday. Expect most of Sunday to be dry.

Another upper low and trough will then move towards the area on Monday and cross the region on Tuesday before departing on Wednesday. Dry weather looks to be in store for the remainder of the week.

As the trough moves through into Sunday, there will be gusty winds in the 25 to 35 mph range both this afternoon and evening and Saturday afternoon and evening. On Sunday, there will still be gusty winds but a bit lower, likely on in the 20 to 30 mph range. NBM probabilities of wind gusts >= 39 mph on Saturday are 50 to 80 percent across the Simcoe Highlands and portions of the Columbia Basin and Cascade Gaps.

Another round of gusty winds develops on Tuesday with the next trough and continue into Wednesday. NBM probabilities of wind gusts >= 39 mph is 40 to 80 percent on Tuesday and 30 to 70 percent on Wednesday across the Kittitas Valley, Simcoe Highlands, Cascade Caps and Columbia Basin.

AVIATION /00Z TAFS THROUGH 00Z SUNDAY/

Breezy conditions (sustained winds of 10-20 kts with higher gusts) are forecast this afternoon and evening at all sites prior to slackening overnight.

VFR CIGs are currently forecast at all sites. However, should note the 12Z HREF suggests a low-medium (30-50 percent) chance of MVFR CIGs overnight into Saturday morning at RDM/BDN with lower chances (20 percent or less) at PDT/ALW/YKM/DLS.

Shower chances are very low (10 percent or less) for all sites through the period, except at DLS/YKM Saturday afternoon where a PROB30 has been included.

FIRE WEATHER

With gusty winds through Sunday fire weather concerns will remain elevated through the weekend mainly for the Oregon Columbia Gorge and Simcoe Highlands. RH values will decrease on Sunday, but winds will too, though they will remain gusty, in the 20 to 30 mph range.

By midweek, RH values may tick up a bit as the next period of gusty winds move in to the Simcoe Highlands, Columbia Basin, Simcoe Highlands and Kittitas Valley. Wind Gusts of 25 to 35 mph and possibly to 40 mph could occur. MIN RH values will generally be 30 to 45 percent, though there will be some locations in the lowest elevations 20 to 30 percent.

Preliminary Point Temps/PoPs

PDT 44 66 41 70 / 0 0 0 0 ALW 50 67 45 70 / 0 0 10 0 PSC 47 71 42 74 / 0 0 0 0 YKM 43 68 40 74 / 0 20 10 0 HRI 46 69 41 73 / 0 0 0 0 ELN 38 59 36 66 / 0 40 10 0 RDM 37 62 29 69 / 0 0 10 0 LGD 44 63 38 66 / 0 0 10 0 GCD 41 64 36 67 / 0 0 20 0 DLS 48 66 43 72 / 10 30 10 0

PDT WATCHES/WARNINGS/ADVISORIES

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