BOZEMAN – Blocking High-pressure is slowly beginning to weaken Monday and it should be gone beginning Wednesday.
Tuesday temperatures will be well above normal as the High-pressure ridge begins to drift out of the region and a new Pacific cold front digs into the Pacific NW. This will produce a stronger SW flow aloft and should force temperatures up into the 40s and 50s locally.
A cooling trend will move back into the state as flow aloft veers to the NW by Wednesday. In fact, temperatures will fall closure to seasonal averages.
Look for off-and-on snow showers to also develop mostly over mountains and passes by Wednesday through the early next week. We are not anticipating a major storm event but a steady flow from the NW with embedded moisture should bring minor snow accumulations to most mountain ranges.