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Airshed charts and summary table can be found here
and maps can be found here.
Tuesday the upper level ridge starts to rebound over ID but
winds aloft remain strong. Warm and dry most locations with a period of
afternoon breezes. MT and southeast through central ID FAIR to GOOD
dispersion. North and west 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 north 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.
Thursday’s weather is similar to Wednesday, with high
pressure keeping winds light and dispersion POOR to FAIR in north ID and north
MT. The rest of central and eastern MT drops to POOR to FAIR dispersion as
well, while FAIR to GOOD dispersion continues in south ID and southwest MT with
warm and dry conditions.
Rebekah McCormick - NRCC Meteorologist