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Dispersion Discussion April 1 2026
Dan Borsum NRCC Predictive Services Meteorologist
Smoke Dispersion Maps and charts on the NRCC Website will be updated MTWTF.
Wednesday increasing southwest flow causes the atmosphere to become more unstable for FAIR to GOOD dispersion in most of ID and western MT. More stable in eastern MT and parts of southwest MT for POOR to FAIR dispersion. Western ID valleys more stable with POOR to FAIR dispersion.
Thursday low pressure moves into western parts of the region bringing chances for rain and snow. With developing low pressure expect breezy conditions for most areas FAIR to GOOD dispersion with sheltered valleys in north ID and northwest MT POOR to FAIR dispersion. More unstable in southern ID for GOOD to VERY GOOD dispersion.
Friday system maintains winds over MT for FAIR to GOOD dispersion but ID begins to see building high pressure for POOR to FAIR dispersion.