Show Information for:
No Restrictions
AS 22
#174014 – Monitor
downwind smoke impacts/dispersion to surrounding area, limit impact to roadways
and Mountain Home AFB.
No Restrictions
AS 6
#176523 and #176524 -
Monitor downwind smoke impacts/dispersion to surrounding Helena area, adjust
accordingly.
Tuesday March 26 Discussion: Southwest flow aloft today will bring good dispersion to most western airsheds. A large-scale upper trough will move through ID/MT tomorrow through Thursday, maintaining good dispersion most western airsheds into Friday.
MARGINAL-GOOD dispersion Today ID and Western MT under SW flow aloft. S-SW surface winds. Rain/snow Central ID. GOOD-EXCELLENT dispersion in Central/Eastern MT with SW-W surface winds.
MARGINAL-GOOD dispersion North/Central ID and Western MT Wednesday under weak SW flow aloft. Light NE-E surface winds North ID/Western MT and S-SW in South ID and SW MT. Scattered showers. GOOD-EXCELLENT dispersion Central/Eastern MT with NW-NE surface winds.
GOOD-EXCELLENT dispersion ID and Western MT Thursday under broad upper trough. NE-E surface winds North ID/Western MT. Rain/Snow. SW-W winds South ID. GOOD-EXCELLENT dispersion Central/Eastern MT with NE-E surface winds. Rain/snow, heavy Central MT along/near mountains.
MARGINAL-GOOD dispersion Friday ID and Western MT under broad upper trough. W-NW surface winds North ID/Western MT except NE near Continental Divide. W-NW winds South ID/SW MT. GOOD dispersion Central/Eastern MT with NW-NE surface winds.
MARGINAL-GOOD dispersion Saturday ID and Western MT under weak ridging. Light SW-W surface winds. GOOD dispersion Central/Eastern MT with SW-W surface winds.
GOOD dispersion Sunday ID and Western MT under weak upper trough. SW-W surface winds. Scattered showers. GOOD-EXCELLENT dispersion Central/Eastern MT with W-NW surface winds.
MARGINAL-GOOD dispersion Monday ID and Western MT under WNW flow aloft. Light/variable surface winds except SW-W South ID. Scattered showers Western MT. GOOD dispersion Central/Eastern MT with N-E surface winds.
Wednesday 27 March Dispersion Forecast
MONTANA
Northwest (AS 1, 2): MARGINAL 01. GOOD 02.
West Central (AS 3A, 3B, 4, 5, 6): GOOD.
Southwest (AS 7, 8A, 8B): GOOD.
Central/Eastern (AS 9, 10): Excellent in AS 09, Good in AS 10.
IDAHO:
North (AS 11): MARGINAL.
North Central (AS 12A, 12B, 13): MARGINAL.
West Central (AS 14, 15, 21A): MARGINAL.
East Central (AS 16, 17): MARGINAL.
Northeast (AS 18, 19): GOOD.
Southeast (AS 20): GOOD.
Southwest (AS 21B, 22, 23, 24, 25): GOOD.
Prepared by Michael Richmond and Coleen Haskell Meteorologists, NRCC