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Dispersion Discussion April 6 2026
Dan Borsum NRCC Predictive Services Meteorologist
Smoke Dispersion Maps and charts on the NRCC Website will be updated MTWTF.
Monday the ridge begins to break down with FAIR to GOOD dispersion over southern ID and southern half of MT. Northern ID and most of northern MT not as warm with POOR to FAIR dispersion.
Tuesday a strong cold front sweeps through the region with a unstable warm and well mixed pre-frontal environment. Wind gusts of 30 to 40 mph will be common. VERY GOOD to EXCELLENT dispersion.
Wednesday is cooler but cold air aloft will support unstable conditions over ID while winds remain moderate over MT and strong over eastern MT. GOOD to VERY GOOD dispersion all areas.
Thursday another disturbance tracks through the region supporting modest pressure gradients and weak inversion. Most areas seeing breezy conditions during the afternoon. North ID more sheltered with FAIR dispersion but other areas GOOD to VERY GOOD dispersion.