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Dispersion Discussion April 3 2026
Dan Borsum NRCC Predictive Services Meteorologist
Smoke Dispersion Maps and charts on the NRCC Website will be updated MTWTF.
Friday system maintains winds over MT for FAIR to GOOD dispersion but ID begins to see building high pressure for POOR to FAIR dispersion. Southern ID has deeper mixing due to warmer temperatures for FAIR to GOOD dispersion.
Saturday similar to Friday except southern ID becoming more stable with warmer air aloft moving in. ID POOR to FAIR dispersion. Central, southwest and Eastern MT FAIR to GOOD dispersion with stronger winds western MT POOR to FAIR with less wind and stronger inversions.
Sunday most of the region under building high pressure aloft with warm air producing inversions. Dispersion POOR to FAIR.
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.