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Last Updated: 2021-09-24 12:13:55.263382 MST
Idaho
No Restrictions
Montana
No Restrictions 

Meteorology/Dispersion Discussion

Last Updated: 2021-09-25 12:51:08.349333 MST

Monday September 27 Discussion: 

MARGINAL-GOOD dispersion North/Central ID and Western MT Today under strong SW flow aloft. S-SW surface winds. GOOD dispersion South ID/SW MT with SW-W surface winds. MARGINAL-GOOD dispersion Central/Eastern MT under WSW flow aloft. SW-W surface winds As 09 and light/variable As 10.

GOOD dispersion North/Central ID and Western MT Tuesday under strong SW flow aloft and upper trough approaching. SW-W surface winds. Rain North and Central ID, scattered showers western MT. GOOD-EXCELLENT dispersion South ID/SW MT with SW-W surface winds. GOOD dispersion Central/Eastern MT under SW flow aloft. W-NW surface winds Central and SE-S winds Eastern.

GOOD dispersion North/Central ID and Western MT Wednesday as upper trough moves through. Scattered showers. W-NW surface winds. GOOD dispersion South ID/SW MT with W-NW surface winds. EXCELLENT dispersion Central/Eastern MT under upper trough. W-NW surface winds.

POOR-MARGINAL dispersion North/Central ID and Western MT Thursday under weak upper ridging. Light/variable winds. POOR-MARGINAL dispersion South ID/SW MT with light/variable surface winds. GOOD dispersion Central/Eastern. S-SW surface winds.

POOR-MARGINAL dispersion North/Central ID and Western MT Friday under weak upper ridging. Light/variable surface winds. POOR-MARGINAL dispersion South ID/SW MT with light/variable surface winds. MARGINAL dispersion Central/Eastern MT under weak SW flow aloft. Light E-SE surface winds.

POOR-MARGINAL dispersion North/Central ID and Western MT Saturday under weak upper ridging. Light/variable surface winds. POOR-MARGINAL dispersion South ID/SW MT with light/variable surface winds. MARGINAL dispersion Central/Eastern MT under weak upper ridging. Light E-SE surface winds.

Tuesday 28 September Dispersion Forecast

MONTANA

Northwest (AS 1, 2): GOOD.

West Central (AS 3A, 3B, 4, 5, 6): GOOD.

Southwest (AS 7, 8A, 8B): GOOD.

Central/Eastern (AS 9, 10): GOOD.

 

IDAHO:

North (AS 11): GOOD.

North Central (AS 12A, 12B, 13): GOOD. 

West Central (AS 14, 15): GOOD. 

East Central (AS 16, 17): GOOD. 

Southeast (AS 18, 19, 20): GOOD.

Southwest (AS 21, 22, 23, 24): EXCELLENT. 

Prepared by Michael Richmond/Steven Ippoliti, NRCC Predictive Services Meteorologists