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Saturday September 19 Discussion:
GOOD dispersion Today Idaho and Western Montana with upper low pressure system in Northcentral MT. W-NW surface winds. Scattered showers. GOOD-EXCELLENT dispersion Central/Eastern Montana with upper low pressure system over Northcentral MT. W-NW surface winds Central MT and SE-S in Eastern MT. Scattered showers near the Divide.
GOOD dispersion Sunday Idaho
and Western Montana with W-NW flow aloft. Westerly surface winds. EXCELLENT
dispersion Central/Eastern Montana with exiting trough/NW flow aloft. W-NW
surface winds, strong in Eastern MT.
MARGINAL-GOOD
dispersion Idaho and Western Montana Monday under SW flow
aloft. SW-W surface winds. GOOD dispersion Central/Eastern MT under WSW flow
aloft. SW-W surface winds.
MARGINAL-GOOD
dispersion Idaho and Western Montana Tuesday under SW flow
aloft with weak upper trough passage. SW-W surface winds. GOOD dispersion
Central/Eastern MT under light SW flow aloft. W-NW surface winds.
MARGINAL-GOOD
dispersion Idaho and Western Montana Wednesday under SW flow
aloft. SW-W surface winds. GOOD dispersion Central/Eastern MT under light
westerly flow aloft/upper ridging. SW-W surface winds.
MARGINAL-GOOD
dispersion Thursday Idaho and Western Montana with SW flow
aloft. SW surface winds. GOOD-EXCELLENT dispersion Central/Eastern Montana with
WSW flow aloft. SW-W surface winds.
Sunday 20 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): EXCELLENT.
IDAHO:
North (AS
11): GOOD.
North Central (AS 12A,
12B, 13): GOOD.
West Central (AS 14,
15, 21A): GOOD.
East Central (AS 16,
17): GOOD.
Northeast (AS 18, 19):
GOOD.
Southeast (AS 20):
GOOD.
Southwest (AS 21, 22,
23, 24, 25): GOOD.
Prepared by Michael Richmond/Coleen Haskell, Meteorologists NRCC