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Dispersion Discussion November 13 2024
Dan Borsum NRCC Predictive Services Meteorologist
Individual charts by airshed can be found here:
Thursday a disturbance weakens the high pressure which increases winds for higher elevations and generally the atmosphere is a bit less stable. Clouds and showers with POOR to FAIR dispersion north ID and northwest MT. Central and southern ID, FAIR to GOOD dispersion with more mixing in the atmosphere except AS14 which is more sheltered. Rest of western MT and central and eastern MT GOOD dispersion stronger winds and weaker inversions.
Friday secondary frontal push across the area with westerly flow aloft over the region. GOOD to EXCELLENT dispersion nearly throughout ID and MT with most airsheds recharged.
Saturday weak high pressure aloft and strong surface high pressure will keep cool air trapped for western MT and most of ID with POOR dispersion. Southeast ID and central and eastern MT FAIR to GOOD dispersion as winds will be a bit stronger.