textproduct: Great Falls

KEY MESSAGES

- A low chance for a few isolated showers south of I-90 this afternoon.

- Above normal temperatures remain through early next week, with daily chances of showers and thunderstorms returning Saturday.

DISCUSSION

/Issued 159 PM MDT Thu Apr 30 2026/

- Meteorological Overview:

Northwest flow aloft will be persistent through Friday. Although there will be a few embedded disturbances withing this pattern, the lack of moisture will keep things mostly dry through Friday, except for a low chance for a few showers south of I-90 this afternoon.

Saturday into early next week, a closed wave trough forms along the Pacific coast. This combined with a cold front will bring in isolated showers and thunderstorms Saturday and Sunday. As this wave pushes farther south early next week, an upper level ridge builds back in across the Pacific Northwest. A northwest flow aloft pattern settles back in, keeping low end chances for showers and thunderstorms daily. Generally, above normal temperatures persist into the weekend and into next week, with a few days of slightly "cooler" due to showers. Breezy conditions look to move back in Tuesday, but nothing looks to be high wind criteria at this time.

- Forecast Confidence & Scenarios:

Showers and thunderstorms through the weekend look to remain on the weaker side due to less moisture. On a given day, there's only up to a 20% chance for 0.05" of moisture at lower elevations and up to a 40% chance at higher elevations. -Wilson

AVIATION

01/00Z TAF Period.

VFR conditions prevail under clear skies and light winds during this TAF period. - Dzomba

PRELIMINARY POINT TEMPS/POPS

GTF 37 72 40 67 / 0 0 0 10 CTB 34 71 41 64 / 0 0 0 10 HLN 36 71 40 70 / 0 0 0 10 BZN 29 68 35 71 / 0 0 0 10 WYS 21 59 25 62 / 0 0 0 0 DLN 31 67 35 71 / 0 0 0 0 HVR 34 76 41 69 / 0 0 0 0 LWT 34 68 40 66 / 0 0 0 20

TFX WATCHES/WARNINGS/ADVISORIES

None.