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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

- Upper ridging will bring widespread 90 degree temperatures through the weekend and isolated triple digits on Sunday.

- Daily chances for isolated thunderstorms, especially during the late evening and nighttime hours.

DISCUSSION

WEATHER PATTERN OVERVIEW:

High pressure centered over the Central Rockies will continue to bring very warm temperatures with widespread 90 degree temperatures through the weekend and isolated triple digits on Sunday. This upper ridging is expected to be the dominant force over the western U.S., extending into eastern Montana, through the forecast cycle.

Weak embedded shortwaves coupled with deep monsoonal moisture will also be present as well bringing high PWATs and daily chances for showers and thunderstorms. That said, the predictability of specific timing and placement for convective behavior will be difficult at larger time scales.

FORECAST CONFIDENCE & DEVIATIONS:

Brought in stronger influence from HRRR for PoPs today to better match neighbors. Otherwise, followed NBM.

AVIATION

UPDATED: 1930Z

FLIGHT CATEGORY: VFR

DISCUSSION: Dry weather conditions for TAF sites today overall. A weak disturbance could bring isolated showers tomorrow evening.

WIND: North around 10 kts during the afternoon, veering east at 10 to 15 kts by the morning tomorrow.

GGW WATCHES/WARNINGS/ADVISORIES

None.

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