Area Forecast Discussion
Issued by NWS Cheyenne, WY

Home | 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 41 42 43 44 45 46 47 48 49 50

FXUS65 KCYS 251147

Area Forecast Discussion
National Weather Service Cheyenne WY
547 AM MDT SAT JUN 25 2016

.SHORT TERM...(Today through Monday)
Issued at 350 AM MDT Sat Jun 25 2016

88D still depicting some isolated weak showers over the plains
early this morning associated with a plume of moisture lifting
north and northeast from northern Mexico...looking rather
monsoonal-like. This moisture will be shunted to the south and
east of the CWA today as the upper flow becomes westerly on the
southern periphery of an upper low moving along the US/canadian
border. this systems will push a cool front south across the CWA
this morning and bring about 5-10 degrees of cooling to the area
today along with gusty winds resulting from mixing of faster mid-
level winds. Dry conditions expected though cannot rule out an
isolated shower or two around the mtns near the Colorado border
this afternoon. Mild tonight then a bit warmer Sunday. Next
impulse looks like it will slide east across the region late
Sunday and could set off widely sctd showers and tstms mainly over
the southern panhandle. Similar pattern seen for Monday except a
weak cool front should back west against the mtns as a sfc high
slides into the northern plains. Better shear should allow for
some stronger storms Monday afternoon with southeasterly surface
winds topped by northwesterly winds aloft.

.LONG TERM...(Monday night through Friday)
Issued at 350 AM MDT Sat Jun 25 2016

An upper level ridge will remain quasi-stationary over the
intermountain west through the medium range period with northwest
flow overhead. The weather will remain fairly active with a number
of embedded shortwaves moving over the forecast area in this flow
pattern. Have at least a slight chance for t-storms each
afternoon over the majority of the CWA. Southerly sfc flow over
the plains will advect moisture into this area on Tuesday with
resultant sbcapes progged to be around 2000 J/kg in the
afternoon. With 40-50kts of shear in place as well, could
certainly see severe storms, mainly across the the plains. A cool
front will drop south across the area Tuesday night bringing
slight cooler temps for Wednesday along with a shift of sfc winds
to the north-northeast, and thus an added upslope component to
generate convection. A return of southeasterly sfc flow on
Thursday will bring back higher values of llvl moisture and
overall instability, and again could see a few storms intensify
within 40 kts of deep layer shear. Friday looks to be very


.AVIATION...(For the 12Z TAFS through 12Z Sunday morning)
Issued at 547 AM MDT Sat Jun 25 2016

Main concern for today will be gusty northwest winds across the
plains with west-southwest winds across the high country. Gusts
to 25 kts are likely. A few showers linger across the Nebraska
panhandle early this morning, otherwise conditions today will be
VFR. Winds will ease tonight.


Issued at 350 AM MDT Sat Jun 25 2016

Critical fire weather conditions should occur once again this
afternoon into this evening over fire weather zone 301 with dry
air and gusty winds behind a cool front that will pass across this
morning. Less wind is expected Sunday into Monday with increasing
chances for showers and tstms especially Monday.


.CYS Watches/Warnings/Advisories...
WY...Red Flag Warning from noon today to 8 PM MDT this evening for



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