Area Forecast Discussion
Issued by NWS Billings, MT

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FXUS65 KBYZ 240257
AFDBYZ

Area Forecast Discussion...Updated
National Weather Service Billings MT
857 PM MDT Thu Mar 23 2017

.UPDATE...

Precipitation continues to diminish over SE MT this evening, with
back edge of cloud cover now near Billings and shifting
southeastward. Will see mostly clear skies by morning across the
area. Added in mention of patchy fog east of a Miles City to
Sheridan line overnight in areas that saw significant
precipitation today. Clearing skies will allow temperatures to
pass the current dew points into the lower 30s, so should see at
least some valley fog despite drier air advecting in from the
northwest. Sheridan set a daily precipitation record today with
0.67 inches of rain. Rest of forecast in good shape. Chambers

&&

.SHORT TERM...valid for Fri and Sat...

Precipitation moving south and east of the area as upper level
flow begins to becoming northwesterly due to low over the 4
corners region cutting off. Expect precipitation to decrease from
north to south late this afternoon and evening but current
webcams show snow is accumulating in the Big Horns so will keep
the advisory going until midnight. Round of ridging will move in
for Friday bringing sunshine and warmer temperatures. Will support
a period of increased winds along the foothills Friday evening
but height falls move into western Wyoming and Montana limiting
potential.

Cold front moves across the area on Saturday with limited upper
level dynamics so temperatures will not be as warm as Friday and
scattered shower activity moves through the region. Front stalls
over southeast Montana and northeast Wyoming Saturday evening as
shortwave energy catches up with it increasing chances for shower
activity. Temperatures relatively warm so only expect rain showers
with some snow possible in the Big Horns. borsum

.LONG TERM...valid for Sun...Mon...Tue...Wed...Thu...

The extended period will feature mostly above normal temperatures
and above normal chances for precipitation. Saturday evening`s
disturbance will be departing the region with precipitation
exiting the forecast area by Sunday morning. Conditions will
remain quiet on Sunday and Monday before a large upper level low
begins to deepen along the western US. While both models send the
upper level low to our south, some models send another disturbance
through just to our north. The interaction of these two
disturbances at least warrants a mention of rain in the forecast
for Tuesday and Wednesday morning.

Good agreement in the models that we`ll be under a ridge and
mostly dry conditions on Wednesday afternoon before another
disturbance approaches the region on Thursday evening.

Temperatures in the extended period will be in the upper 50s and
low 60s on the drier days, while clouds and increased rain
chances associated with the passing disturbances will keep
conditions in the lower 50s on the wetter days. Night time lows
will generally be in the 30s through most of next wee. Dobbs


&&

.AVIATION...

VRF conditions will prevail across the region overnight, with
lingering showers clearing quickly from southeastern zones.
Patchy fog is possible across southeast Montana and northern
Wyoming overnight, including KBHK, KMLS, KSHR, and Ekalaka, as
temperatures fall rapidly in areas that received recent rainfall.
Patchy river valley fog is also possible across much of the
region. AAG

&&

.PRELIMINARY POINT TEMP/POPS...

    Fri     Sat     Sun     Mon     Tue     Wed     Thu
-----------------------------------------------------------
BIL 033/062 043/056 036/056 036/060 039/054 036/060 038/057
    10/U    12/W    32/W    11/B    33/W    11/U    12/W
LVM 028/059 038/053 030/053 032/055 033/054 033/060 035/056
    10/N    13/W    41/B    12/W    32/W    11/B    12/W
HDN 031/064 038/058 034/058 034/064 037/056 034/062 036/061
    10/U    02/W    32/W    11/B    22/W    11/B    11/B
MLS 034/064 039/063 038/060 037/063 039/054 037/061 037/060
    00/U    01/E    32/W    00/B    34/W    32/W    11/B
4BQ 032/061 037/061 038/057 035/063 037/055 036/060 037/060
    10/U    01/E    62/W    00/B    34/W    32/W    11/B
BHK 030/059 034/061 036/058 032/060 034/052 034/057 034/057
    20/U    00/B    53/W    00/B    46/W    42/W    11/B
SHR 030/060 036/056 034/054 031/060 036/055 034/060 034/059
    20/U    02/W    52/W    11/B    33/W    21/B    11/B

&&

.BYZ WATCHES/WARNINGS/ADVISORIES...
MT...None.
WY...None.

&&

$$
weather.gov/billings



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