There will be isolated showers and thunderstorms tonight and tonight, generally in locations south and west of Great Falls, as some monsoon moisture is seeping into our area. We will also have partly to mostly cloudy tonight, then we will have waning clouds tonight. For tomorrow we will have increasing clouds throughout the day with some occasional rain showers and thunderstorms in the afternoon and evening, as an upper trough is sending some moisture into our area. Also, most of the thunderstorms that develop today and tomorrow will not be severe, although frequent lightning, heavy rainfall, gusty winds, and small hailstorms are still possible when thunderstorms occur.
At the beginning of this weekend, there is a slim chance we will see a few showers and thunderstorms during the afternoon hours, but most places will stay dry. We will have mostly to mostly sunny skies this weekend as well.
It will continue to be very hot tomorrow and this weekend as the high temperatures will continue to be in the mid to upper 90s and below 100s in most locations. Because of this heat, a heat warning applies to central Montana until 9:00 p.m. tomorrow and a warning of excessive heat until 9:00 p.m. Saturday in eastern Montana. Fortunately, even though it will be hot during the day, we will at least continue to get some relief from the heat at night, as the lows for the next four years will generally be in the top 50s and mid-60s nights.
This evening, tonight, tomorrow and Saturday it will be breezy in east Montana as the sustained winds will be between 10 and 20 miles per hour. It will also be a bit breezy this evening and Saturday along the Hi-Line, as the wind speeds will be between 10 and 24 km / h. Because of this wind, Fort Peck Lake will have a Lake Wind Advisory until 1:00 a.m. tomorrow morning. Most locations east of Great Falls will also have a red flag warning until 9 p.m. tomorrow as critical fire weather conditions are expected.
It will continue to be hot at the beginning of next week, although it will be a little cooler than tomorrow and this weekend as the highs will be in the upper 80s and low to mid 90s. It will continue to be mild at night next week as well, as the lows in most locations will be in the mid to upper 50s and lower 60s. It will also be a little windy on Tuesday, Wednesday, and Thursday next week in central Montana as the sustained wind speeds will be between 10 and 25 miles per hour. Eastern Montana will be breezy for the whole of next week as the sustained winds will be between 10 and 20 miles per hour. We will continue to have mostly sunny skies and mostly dry conditions next week as the high pressure will continue to control our weather.