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 /00Z TAFS THROUGH 00Z SATURDAY/

VFR conditions will largely prevail through the TAF period. The exception will be where heavy showers develop, which have the potential to bring slight reductions in VIS (to MVFR). Rain chances will persist through mid to late this evening for areas along and southeast of a BDN/RDM to PDT to ALW line. Low chances for thunderstorms will continue during this time as well. However, by late this evening, activity is expected to wane. Some showers may linger into the overnight hours, but most areas should be dry overnight. Low chances (10-30%) of showers then return Friday afternoon, but this activity looks to remain concentrated to the southeast over the Blue Mountains. Light southerly winds tonight will become westerly Friday afternoon and range between 5-10 knots with gusts to around 10-15 knots.

Preliminary Point Temps/PoPs

PDT 50 77 47 79 / 60 0 0 0 ALW 55 78 54 80 / 60 0 0 0 PSC 52 81 51 83 / 10 0 0 0 YKM 52 81 52 82 / 0 0 0 0 HRI 53 81 51 82 / 40 0 0 0 ELN 51 77 50 77 / 0 0 0 0 RDM 41 75 40 79 / 50 0 0 0 LGD 48 74 46 79 / 60 10 10 0 GCD 48 74 46 79 / 60 10 10 0 DLS 57 82 54 86 / 0 0 0 0

PDT WATCHES/WARNINGS/ADVISORIES

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