textproduct: Pendleton

KEY MESSAGES

- Showers (30-70%) and isolated thunderstorms (15-30%)through this evening, and again on Friday, mainly from the Blue Mountains eastward.

- Dry weather from Saturday through much of next week, with warming temperatures through the weekend.

DISCUSSION

An upper level low pressure system will move slowly northeastward through Friday and then further east and out of the area on Saturday. In the meantime, it will bring scattered showers, and isolated thunderstorms through this evening, mainly along and from Bend/Redmond to Pendleton to Walla Walla and points eastward.

On Friday, any showers and thunderstorms should be from the Blue Mountains eastward, as the low moves. Beyond Friday, High pressure will build over the Pacific Northwest and dry weather with warming temperatures are expected, with highs even reaching above normal.

The ridge will break down by Monday and become more zonal and westerly, then southwesterly in response to low pressure in the Pacific Ocean. However, dry weather will continue, though temperatures will cool and be a few degrees below normal through midweek.

On Tuesday, there looks to be some breezy winds through the Cascade Gaps, Columbia Basin and Gorge that could reach 20 to 25 mph and possibly 30 mph. Also by midweek, low relative humidities will return to central Oregon. However, lighter winds are expected. There could be some periods of locally elevated fire weather concerns, but no widespread critical conditions are expected.

AVIATION /06Z TAFS THROUGH 06Z SATURDAY/

Showers are expected to continue for the beginning of the TAF period, however confidence is low (less than 30%) that these showers will extend beyond 09z Friday. As such, VFR conditions will largely prevail through the TAF period. There is high confidence (greater than 70%) that cloud cover will be minimal past 09z with any clouds that do form remaining 15 kft or above. Confidence is likewise high (greater than 70%) that prevailing winds will remain under 10 knots for most sites, though it is feasible (30-50% chance) that wind gusts could be as high as 15-20 knots locally as the region transitions to standard, diurnal wind patterns. Confidence remains low (under 30%) that wind gusts will exceed 20 knots, especially by Friday evening.

Preliminary Point Temps/PoPs

PDT 50 77 47 79 / 60 10 0 0 ALW 55 77 54 79 / 70 10 0 0 PSC 52 81 50 82 / 10 0 0 0 YKM 52 81 50 81 / 0 0 0 0 HRI 53 81 50 82 / 30 0 0 0 ELN 51 77 49 77 / 0 0 0 0 RDM 41 75 39 78 / 40 0 0 0 LGD 48 74 46 78 / 70 10 10 0 GCD 48 74 46 78 / 70 10 0 0 DLS 57 82 54 84 / 0 0 0 0

PDT WATCHES/WARNINGS/ADVISORIES

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