Area Forecast Discussion
Issued by NWS Glasgow, MT

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS65 KGGW 271504
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
904 AM MDT Tue Jun 27 2017

.SHORT TERM...for northeast Montana...today through Thu...

Updated forecast with more defined pop grids. Looks like current
batch of echoes are going to move northeast across the north-
central zones, but will be fighting low-level dry air. So kept
greatest wording as Scattered Showers and not Likely wording. Next
batch of showers to move across the southern zones this afternoon.

Lake Wind Advisory looks marginal today with the lack of mixing
due to the abundant clouds. Showers or virga may add to winds
today. Best winds look to occur late this afternoon from 4 pm till
7 pm.

With showers in the area, humidities not too low and thus no fire
weather concerns. TFJ

Previous Discussion...
Upper ridge over the region collapsing today as a shortwave trof
pushes through the northern Rockies. Trof will push a cold front
across eastern Montana this morning with winds turning west and
increasing. Enough cold air advection and winds aloft to continue
lake wind advisory. Additional moisture also spreading into
central Montana for the potential for a few showers as the front
moves east.

Upper low moves into Saskatchewan on Wednesday and lingers into
Thursday. Generally dry weather is expected for Wednesday with
light winds. On Thursday as the upper low moves south, it will
push a cold front into northern Montana along with the possibility
of a few showers or thunderstorms. Ebert


.LONG TERM...Thu night through Tue...

The extended forecast period beginning Thursday evening will see
Northeast Montana with a northwest flow pattern aloft based on an
upper trough swinging southeast through the local region. By
Friday afternoon this trough will have moved east enough to allow
cooler than normal temperatures to rebound to normal. This trough
may bring some shower and thunderstorm activity to the area but
wetting rains are not likely.

A narrow ridge will continue the warming for Saturday, but an
short-wave disturbance will knock it down for Saturday evening.
Models are unclear but showers may be initiated Saturday night and
Sunday as the disturbance moves through the region.

Another ridge follows to begin next week for more dry and warm
conditions. Although it`s difficult to say this far out, the
models suggest another trough running through southern Canada
which may place a frontal boundary over the local area for the
possibility of showers beyond Monday.

Templer

&&

.AVIATION...

Flight category: VFR

Radar & satellite imagery is showing isolated rain showers and
thunderstorms over the local region this morning. These showers
will not be included in the TAFs initially. Expect amends for any
MVFR/IFR storms that are tracked to affect any terminal area.

Light and variable winds this morning. Winds will then shift to
the northwest and become gusty again this afternoon. Scattered
showers are also possible.

Templer

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...
Lake Wind Advisory until 9 PM MDT this evening For Fort Peck
Lake for Central and Southeast Phillips...Central and Southern
Valley...Garfield...McCone...Petroleum.

&&

$$

weather.gov/glasgow


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.