textproduct: Pendleton

DISCUSSION

A warming pattern will continue into the end of the workweek as an offshore ridge axis amplifies and builds inland, bringing subsidence and benign sensible weather. Forecast high temperatures continue to trend higher through the 70s and 80s by the end of the week with limited HeatRisk of Level 1 which affects the most vulnerable to heat who also have no cooling or hydration. A backdoor surface cold front will be driven southwest across the region Wednesday night through Thursday morning, driven by an associated mid level shortwave just east of the region, flipping winds out of the northeast but having little impact on the warming trend into Thursday afternoon other than muting how warm the afternoon temps jump from the previous day.

The day 7, the ensembles hint synoptic pattern developing an upper trough over the PAC NW, leading to cooler and wetter conditions May 26-27. Clusters 1-3 are in reasonable pattern agreement, with cluster 4 showing an alternative scenario and a 5% outlier placing a warm dry ridge over the region. The leadup to this may bring enhanced winds in the gaps areas over the weekend as the westerly winds return with strongest winds with potential for wind advisories over the usual windy spots like Kittitas Valley, Eastern Columbia River Gorge and the the Blue Mountain foothills.

AVIATION /12Z TAFS THROUGH 12Z THURSDAY/

VFR condition are expected (95% confidence) for the entire TAF period as the only clouds remains cirrus clouds above 20kft and light winds under 10 kts everywhere with the exception of DLS where slightly more breezy winds come though the Gorge (10-20 mph), and YKM and RDM between about 5 pm and 11 pm.

Preliminary Point Temps/PoPs

PDT 73 46 76 47 / 0 0 0 0 ALW 73 49 76 50 / 0 0 0 0 PSC 78 51 81 50 / 0 0 0 0 YKM 79 50 80 52 / 0 0 0 0 HRI 76 49 79 49 / 0 0 0 0 ELN 73 45 75 47 / 0 0 0 0 RDM 73 39 77 41 / 0 0 0 0 LGD 70 41 73 42 / 0 0 0 0 GCD 73 39 75 40 / 0 0 0 0 DLS 77 51 83 54 / 0 0 0 0

PDT WATCHES/WARNINGS/ADVISORIES

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