563
FXUS65 KGGW 092040
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
240 PM MDT Mon Jun 9 2025

.DISCUSSION...

KEY MESSAGES:

1) Haze and smoke will continue to be problematic at times,
and may be in the unhealthy range by Tuesday behind a cold front.

2) A transition to more active weather with scattered showers,
thunderstorms, and wetting rains is expected to get underway on
Tuesday through much of the week.

WEATHER PATTERN OVERVIEW:

Hot afternoon temperatures and hazy skies will give rise to a
fairly mild overnight with clear skies with lows in the 50s to
near 60. Meanwhile, late tonight into Tuesday a more significant
plume of haze and smoke may push into the region behind a cold
frontal passage. Showers and thunderstorms late in the day may
produce gusty winds, with support from the current HREF ensemble.

Showers and isolated thunder may linger into Wednesday. Look for
total QPF in the few hundredth to up to a tenth range for most of
this activity, expected to be fairly hit or miss.

Thursday into Friday could feature more widespread thunderstorms
across the area, especially south of the Missouri River where
quarter to half inch rainfall amounts will be common - isolated
higher totals directly under steadier storms. There may be a sharp
cutoff to the steadier showers in the northeast that will need to
be monitored in future forecast updates.

FORECAST CONFIDENCE & DEVIATIONS:

Confidence is high on haze and smoke at times over the next couple
of days. Medium confidence exists on thunderstorms this week,
especially with regard to exact rainfall amounts and placement.
Again, it will be especially worth monitoring the sharp cutoff in
steadier totals setting up across the northeast as the gradient
tightens with future forecast cycles.

&&

.AVIATION...
Updated: 2040Z on June 9.

VFR is expected through tonight with sunny and hazy skies through
the period. Initial haze and smoke is shifting east while a
stronger area of smoke pushes south on Tuesday with possible MVFR
visibilities.
Showers and isolated thunder should remain west of the terminals
through 00Z Wednesday.

&&

.GGW WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

weather.gov/glasgow