textproduct: Pendleton

AVIATION...06Z TAFs

VFR conditions to prevail through the period. CIGs of sct-bkn will mostly stay above 15kft AGL through the period. Breezy winds 15-25kts with gusts 30-35kts will impact site DLS after 19Z. Winds of 12-17kts with gusts to around 25kts will develop at sites PDT/RDM/BDN/YKM between 18Z-22Z, and persist into the evening hours, otherwise winds will be light. Light winds, 12kts or less, will prevail at sites ALW/PSC through the period. Lawhorn/82

PREV DISCUSSION... /issued 151 PM PDT Tue Jun 10 2025/

SHORT TERM...today through Friday Morning...Satellite shows mostly clear conditions across the region, however convection appears to be forming on the southern part of the CWA close to the Bend/Redmond and John Day areas. The greatest potential for thunderstorms will be secluded to Central OR and areas along the Southern Blues and Eastern Mountains later this afternoon. As the shortwave pushes through the region, enough uplift and moisture will help develop isolated thunderstorms later on this afternoon. Outflow boundaries from these storms can bring some gusty winds of up to 45 knots. The greatest chance for developing storms will be between now and 8PM tonight, shortly before sunset.

With the dominant ridging pattern now becoming more trough focused, temperatures will cool down from the triple digits we saw today and yesterday to the mid-upper 80s by Thursday in much of the Basin (>85% chance) and other higher elevated population centers. Not seeing anything to suggest additional Heat Advisories are needed in the short term as the Heat Impact Level drops to 1-2, then mostly to 1 by Thursday. Although the pattern remains mostly trough oriented, the Basin and the Kittitas remain fairly dry for the entirety of the short term due to lack of moisture advection with this system.

Winds will be a bit breezy Wednesday afternoon near the Dalles/Mountain gaps with DESI advertising >90% chance for wind gusts greater than 45 mph. Not too confident about issuing Wind Advisory as the area doesn't seem to be large enough but will keep an eye if winds in this area trend one way or another or if the area of impact increases between now and then.

LONG TERM...Friday Morning through Tuesday...Models remain fairly confident Friday going into Saturday that a trough will sit just off the Pacific coast and keep conditions dry and temperatures near normal. However, models greatly diverge as we head into the weekend going into early next week on how it wants to handle the incoming trough and its strength. A weaker trough signifies that the area will see much less precipitation while the truth remains for the opposite. About 22% of cluster members want to bring a stronger trough and bring light precip across the region with hints of light mountain snow across the Blues. One thing remains certain is that we're not expecting a system with significant impacts regarding QPF amount (50-70% chance) as moisture doesn't seem significant even with the most "aggressive" solutions.

PRELIMINARY POINT TEMPS/POPS

PDT 62 90 55 84 / 10 10 0 0 ALW 67 90 60 83 / 0 10 0 0 PSC 61 94 57 88 / 0 0 0 0 YKM 62 94 57 86 / 0 0 0 0 HRI 62 92 57 87 / 0 10 0 0 ELN 62 88 57 80 / 0 0 0 0 RDM 51 86 45 80 / 20 0 0 0 LGD 61 85 52 81 / 10 20 0 10 GCD 59 86 50 83 / 40 30 10 10 DLS 61 84 57 79 / 0 0 0 0

PDT WATCHES/WARNINGS/ADVISORIES

OR...None. WA...Red Flag Warning until 8 PM PDT Wednesday for WAZ690.