Area Forecast Discussion
Issued by NWS Billings, MT

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FXUS65 KBYZ 252125

Area Forecast Discussion
National Weather Service Billings MT
325 PM MDT Tue Jul 25 2017

.SHORT TERM...valid for Wed and Thu...

Monsoonal moisture advecting north over the region and weak
upslope flow near the surface has allowed clouds to increase and showers
to form over the area this afternoon. Weak forcing has kept most
activity as showers. Scattered showers and isolated thunderstorms
will continue to spread over the area through the evening. Best
chance of showers/thunderstorms will be generally south of a
Livingston to Billings to Ekalaka line. Temperatures have ranged
from the 70s over western and central zones, to the 80s across the

Warmer conditions can be expected for Wednesday and Thursday as
ridging builds back over the Northern Rockies. However, monsoonal
moisture is projected to increase over the region, with weak
impulses moving through as well. This will keep shower and
thunderstorm chances in the forecast, highest over the mountains.
A few thunderstorms could be strong on Thursday as a shortwave
approaches from the west, instability increases, and southeast
flow develops at the surface. Temperatures will range from the
80s to lower 90s Wednesday and Thursday. STP

.LONG TERM...valid for Fri...Sat...Sun...Mon...Tue...

Friday morning, shortwave pushes east into the Dakotas while more
energy makes its way into the western Mountains. Shower and
thunderstorm chances remain mainly confined to high terrain and
foothills by afternoon. Unsettled pattern continues into early
next week with periods of energy rounding the ridge over the
central Rockies. Thunderstorms look monsoonal in nature and driven
by diurnall heating. Temperatures should remain in the upper 80s
to low 90s through the period with upper-level cloud cover keeping
things in check despite continued ridging. Walsh



Scattered light showers and virga continue to push across the
area in the vicinity of LVM, BIL, and SHR and will persist through
the evening. VFR conditions anticipated through the period. Walsh



    Wed     Thu     Fri     Sat     Sun     Mon     Tue
BIL 062/089 065/089 064/091 064/091 063/092 064/092 063/092
    22/T    23/T    31/B    11/U    21/U    21/U    21/U
LVM 054/085 057/085 056/086 055/089 056/090 056/089 055/090
    22/T    33/T    32/T    22/T    21/U    22/T    22/T
HDN 060/091 062/091 063/093 064/093 063/094 063/094 062/094
    22/T    23/T    31/B    11/U    21/U    21/U    21/U
MLS 063/092 069/092 068/093 065/094 066/094 067/094 065/093
    11/U    23/T    32/T    10/U    21/U    10/U    10/U
4BQ 062/089 065/089 065/091 064/092 064/092 066/092 062/091
    21/B    23/T    42/T    10/U    21/U    21/U    21/U
BHK 059/089 063/089 064/090 062/091 061/090 063/091 061/089
    11/U    22/T    33/T    21/U    11/U    11/U    21/U
SHR 056/085 058/086 058/088 057/088 058/089 058/089 057/088
    34/T    33/T    42/T    22/T    22/T    22/T    22/T




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