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This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.

KEY MESSAGES

- Hot and dry conditions continue through the next week.

- Chance of widespread moderate HeatRisk and slight chance of major HeatRisk going into mid next-week possible.

- Slight chances (10-25%) of isolated thunderstorms possible through the Blue Mountains Monday to Wednesday.

AVIATION /06Z TAFS THROUGH 06Z SUNDAY/

Westerly winds under 12 knots will prevail This Morning until boundary layer mixing kicks off stronger gusts in the afternoon. Gusts of 20 to 30 knots will become more common after 21z with strongest gusts at DLS. VFR with clear sky and very dry near surface layer. Russell/71

FIRE WEATHER

For Today, an area of interest with respect to potentially flirting red flag conditions across WA694/WA691 west and southwest of Yakima has about 20 to 50% chances of reaching red flag conditions, which is too low of statistical confidence to consider read flag (80%). Conditions could be approaching the red flag criteria for wind and RH around Anthony late Saturday afternoon before a front switches winds form the SW to the Northwest and increases RH by about 01 UTC.

A deep southwest flow over time will bring a fetch of weak monsoonal moisture into eastern Oregon by midweek, increasing chances for high based or elevated thunderstorms over dry low level profiles, which could have impacts due to dry lightning over eastern Oregon zones that have all been dried out enough to undergo rapid spread. Isolated Thunderstorms are possible Tuesday as a result. Chances for wetting rain are very low, at only about a 15% chance of 0.10 precipitation across the Blue Mountains. Isolated downburts can lead to erratic winds Monday through Wednesday afternoon, but best probabilities on Tuesday (25%). Russell/71

Preliminary Point Temps/PoPs

PDT 87 57 84 56 / 0 0 0 0 ALW 90 62 85 60 / 0 0 0 0 PSC 92 61 88 57 / 0 0 0 0 YKM 89 58 88 56 / 0 0 0 0 HRI 90 60 87 58 / 0 0 0 0 ELN 84 53 81 52 / 0 0 0 0 RDM 88 51 87 52 / 0 0 0 0 LGD 95 57 87 57 / 0 0 0 0 GCD 97 57 91 57 / 0 0 0 0 DLS 84 59 87 58 / 0 0 0 0

PDT WATCHES/WARNINGS/ADVISORIES

WA...None. OR...Heat Advisory until 7 PM PDT Sunday for ORZ050.

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