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Friday: Pattern change with
southwesterly flow aloft developing over the region. Snow cover may still cause
morning inversion., Areas with stronger winds but moist flow into the mountains
of central ID and parts of western MT.
Northern ID and northwest and west central MT MARGINAL to GOOD dispersion with
southwest winds but shower activity. Central and southern ID POOR to MARGINAL
dispersion with westerly winds and mountain snow and valley rain. Southwest MT
and eastern MT POOR to MARGINAL dispersion with lighter winds. GOOD dispersion
central MT with downsloping winds.
Saturday: Strong southwest flow
aloft bringing windy conditions to many areas with weak inversions. Widespread
mountain snow and rain for ID and western MT. Less precipitation for the
valley. Downsloping conditions in the lee of the mountains in central MT. GOOD
to EXCELLENT dispersion though burning conditions will be challenging in areas
of precipitation.
Sunday: Strong cold front
expected to cross through the region continuing to bring breezy conditions and
limited inversion formation. Mountain snow shower activity. GOOD to EXCELLENT
dispersion.
Friday 31 March Dispersion Forecast
MONTANA
Northwest (AS 1, 2):
GOOD.
West Central (AS 3A, 3B, 4, 5, 6): MARGINAL.
Southwest (AS 7, 8A, 8B) : MARGINAL.
Central/Eastern (AS 9, 10): GOOD central...POOR east.
IDAHO
North (AS 11): GOOD.
North Central (AS 12A, 12B, 13): MARGINAL.
West Central (AS 14, 15): POOR.
East Central (AS 16, 17): POOR.
Southeast (AS 18, 19, 20): POOR.
Southwest (AS 21, 22, 23, 24): MARGINAL.