Area Forecast Discussion
Issued by NWS Cheyenne, WY

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
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

000
FXUS65 KCYS 170943
AFDCYS

Area Forecast Discussion
National Weather Service Cheyenne WY
243 AM MST Fri Feb 17 2017

.SHORT TERM...(Today - Sunday)
Issued at 222 AM MST Fri Feb 17  2017

Gusty winds will likely persist at BRX for a few more hours as the
ARL-BRX MSLP gradient remains around 4 mb through 12z. However, it
appears the threat for warning-criteria wind gusts has ended given
weakening flow aloft. We expect to be able to cancel the High Wind
Warning early, but will continue to monitor WYDOT obs in case wind
gusts exceed 50 MPH again. Otherwise, a generally dry/mild weather
pattern prevails through the short term period. An upper-lvl ridge
will remain intact over the eastern plains w/ moist southwest flow
aloft increasing to the W of the Laramie Range. In general, expect
more cloud cover in the next few days with more influence from the
upper trough to the southwest, but H7 temperatures ranging from +2
to +5 deg C and a lack of precipitation will keep highs in the 50s
and 60s along/E of the Laramie Range. Periods of mountain snow are
likely with jet energy overhead, but do not expect to see a lot of
snow accumulation in the high country. PoPs increase markedly near
the end of the period (Sun afternoon) as both the GFS/ECM show the
aforementioned trough lifting northeast into western CO.

.LONG TERM...(Sunday night through Thursday)
Issued at 222 AM MST Fri Feb 17 2017

Upper shortwave along with an associated cool front will move
across the CWA Sunday night with sctd rain and snow showers
passing across as well. Dry and a little cooler across the CWA
Monday with a short upper ridge moving across the region. Warmer
Tuesday as the upper flow turns more southwesterly ahead of an
upper trough that will be nearing the west coast. Rather windy as
well Tuesday especially in the wind-prone areas. A few showers
could impinge on far western parts of the CWA late Tuesday. Weds
and Thursday should turn cooler and wetter as the aforementioned
upper trough moves inland and moves a surface and upper low across
Colorado Thursday with rain and snow showers Weds likely becoming
mostly snow on Thursday as colder air drops south over the
region.

&&

.AVIATION...(For the 12Z TAFS through 12Z Saturday morning)
Issued at 222 AM MST Fri Feb 17 2017

VFR expected overall through the period for all terminals. There
could be some MVFR cigs/vsbys affecting the KRWL area tonight with
higher mtns likely obscured in snow showers.

&&

.FIRE WEATHER...
Issued at 222 AM MST Fri Feb 17 2017

Fire weather concerns will generally remain minimal with fuels not
supportive of large fire growth. However, a continued warm and dry
pattern will support widespread minimum RH values of 15-25 percent
with the lowest values today (Friday). Unlike previous days, winds
will be fairly light through the period albeit a little gusty this
morning.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...High Wind Warning until 5 AM MST early this morning for WYZ106.

NE...None.
&&

$$

SHORT TERM...CLH
LONG TERM...RE
AVIATION...RE
FIRE WEATHER...CLH



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