Area Forecast Discussion
Issued by NWS Billings, MT

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FXUS65 KBYZ 211506

Area Forecast Discussion...Updated
National Weather Service Billings MT
906 AM MDT Wed Jun 21 2017

Inherited forecast looks fine. No adjustments necessary this
morning. Breezy to windy afternoon in store for easter zones.
Hydro-wise...we are monitoring the Clarks Fork at Edgar which is
only a half foot below flood stage. We believe it is peaking now
and should turn down rest of day.  BT


.SHORT TERM...valid for Tdy and Thu...

The area will remain in zonal to slightly northwesterly flow
today. With the dry air behind the front that moving through
overnight and early this morning, the area remain dry. As the
atmosphere mixes out today, winds are going to increase.
Northwest winds will be 20 to 25 mph with gusts to 30 mph this
afternoon, especially east of Billings. While temperatures today
are expected to be 10 degrees cooler than yesterday, the drier air
will keep the relative humidity values this afternoon just as
low, in the low to mid 20s.

Another push of Canadian air will move in Thursday as a low over
southern Canada drops another front through the area. Mostly this
front will be dry Thursday as there still is not much moisture to
tap into. Winds should not be quiet as strong, but with the winds
behind the front will increase again. Temperatures will again been
cooler, with highs another 5 degrees cooler. Reimer

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

Cooler temperatures and a chance of showers and thunderstorms
remain in the forecast for the early portion of the extended.
Models continue to push back timing of best precipitation, now
expected for Saturday as upper energy rotates into the area around
central Canadian upper low. Ridging develops for Monday and
Tuesday as another upper low develops along the west coast. This
will bring dry and warmer conditions to the area to start the
week. Uncertainty with what to do with the west coast upper low
muddies the forecast from Tuesday onward as some solutions cut it
off over the Pacific Northwest and other have a weaker solution
with the low well to the northwest of the area. For now the
ensemble mean southwest flow solution brings a pattern favorable
for afternoon/evening convection so trended the forecast
precipitation chances that way.

For those planning outdoor activities in the Mountains and
Foothills late week into the weekend, bring plenty of warm
clothing as daytime highs in the 50s and 60s will fall into the
30s and lower 40s overnight with some lower elevation areas
possibly seeing sub-freezing lows. Chambers


VFR conditions expected for the next 24 hours. Winds this
afternoon will mix out to west/northwest with gusts to 30kts at
times. RMS/BT



    Tdy Thu     Fri     Sat     Sun     Mon     Tue
BIL 082 053/076 048/069 045/067 045/074 049/086 055/089
    0/U 00/U    12/T    33/T    10/U    01/U    12/T
LVM 080 043/073 039/068 039/065 036/074 041/084 047/085
    0/U 00/U    02/T    23/T    10/U    01/U    12/T
HDN 083 052/077 047/070 046/068 044/076 049/086 055/091
    0/U 00/U    12/T    33/T    10/U    01/U    12/T
MLS 083 054/076 048/069 046/069 045/075 048/085 055/091
    0/N 00/N    12/T    22/T    10/U    01/U    12/T
4BQ 083 055/077 047/068 045/066 042/073 046/083 052/090
    0/N 10/U    11/B    33/T    10/U    01/U    11/U
BHK 080 052/073 045/066 042/066 040/071 043/081 050/088
    0/N 00/N    11/B    22/T    10/U    01/U    11/U
SHR 078 051/074 044/067 043/063 039/071 043/081 050/086
    1/U 11/U    12/T    34/T    21/U    01/U    12/T




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