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Area forecast discussion 
National Weather Service Billings Montana
323 am MDT Friday Jul 31 2015

Short term...valid for today and Sat...

Dry northwest flow will keep the area void of convection the next
couple of days. The mountains will see a few afternoon cumulus
clouds...but that should be the extent of things convection wise.
Heights will rise as an upper ridge builds north. This will cause
temperatures to soar well into the 90s. Humidities will fall to a
range of 10-15 percent most places in the afternoons. Keep the lip
Balm and sun screen handy this weekend. Twh

Long term...valid for sun...Mon...Tue...Wed...Thu...

Made a few changes to the extended forecast period this
morning...the majority of which were quite minor...consisting of
trending probability of precipitation up slightly. The more significant changes were warm
temperatures for Sunday and Monday.

The upper level ridge appears firmly in control over the region
Sunday and Monday...to start the extended forecast period. Dry
airmass should allow for highs approaching the century mark.
Trended temperatures upward both days...most significantly for
Monday...as Monday may actually be warmer than Sunday depending on
the timing of the shortwave that breaks down the ridge and signals
the beginning of the pattern change. Upper level flow. Shifts
southwest on Monday...as an upper level trough deepens of the
Pacific coast. This this opens the door to Pacific moisture and
monsoonal flow into the region through the remainder of the
period. This should result in at least afternoon and evening
showers and thunderstorms Monday afternoon through the end of the
extended period...as waves of energy radiate through the region
ahead of the trough. Afternoon cloud cover and increased relative humidity values
should support at least slightly cooler temperatures from Tuesday Onward.
Models very on passage of the main trough axis...but earliest
indications are for the end of next weekend...which would bring
improved precipitation potential...and cooler temperatures. Aag

&&

Aviation...

VFR conditions expected across the area through today and
tonight. Aag

&&

Preliminary point temp/pops...

Today Sat sun Monday Tuesday Wednesday Thursday
-------------------------------------------------------
bil 095 061/097 062/098 063/097 064/089 061/087 060/084
0/u 00/u 00/u 12/T 22/T 22/T 23/T
lvm 093 050/094 053/095 057/093 056/084 054/084 053/083
0/u 00/u 01/u 13/T 33/T 32/T 33/T
hdn 096 058/099 058/100 061/099 062/091 059/089 059/086
0/u 00/u 00/u 02/T 22/T 22/T 23/T
mls 096 060/099 061/099 064/097 066/090 063/088 061/085
0/u 00/u 00/u 02/T 23/T 32/T 33/T
4bq 095 058/098 060/099 062/096 063/090 060/086 059/085
0/u 00/u 00/u 02/T 22/T 22/T 33/T
bhk 092 057/096 058/096 060/092 061/085 059/084 058/081
0/u 00/u 00/u 02/T 23/T 33/T 34/T
shr 093 053/094 055/096 058/094 058/088 057/086 055/083
0/u 00/u 00/u 12/T 22/T 22/T 23/T

&&

Byz watches/warnings/advisories...
Montana...none.
Wyoming...none.

&&

$$
Weather.Gov/Billings

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