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All Proposals approved
Airshed charts and summary table can be found here and maps can be found here.
Monday an upper level ridge pattern brings a hot dry and windy day to the region. A strong jet stream moves into western Canada which pushes a cold front through ID and MT. Exceptional temperatures in advance of the front in the 70s and 80s will support strong mixing with surface winds of 25 to 35 mph during the afternoon to bring GOOD to EXCELLENT dispersion. A few valleys in ID may be more sheltered for FAIR to GOOD dispersion.
Tuesday the upper level ridge tries to rebound over ID but winds aloft remain strong. Warm and dry most locations with a period of afternoon breezes. MT and southern and central ID FAIR to GOOD dispersion. North ID lighter winds and stronger inversions for POOR to FAIR dispersion.
Wednesday surface high pressure west of the Continental Divide and over southwest MT strengthens which causes the stronger inversions and lighter winds to spread from north ID into northwest MT with POOR to FAIR dispersion. Other areas will continue to enjoy warm and dry temperatures supporting decent mixing heights and afternoon breezes with FAIR to GOOD dispersion.
Dan Borsum - NRCC Meteorologist