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000
FXUS65 KCYS 050433
AFDCYS

Area Forecast Discussion
National Weather Service Cheyenne WY
933 PM MST Thu Mar 4 2021

.SHORT TERM...(Tonight - Friday)
Issued at 230 PM MST Thu Mar 4 2021

A few rain and/or snow showers will remain possible along the I-80
corridor through this evening as a well-organized upper low drifts
eastward across the central Rockies. No impacts expected from this
activity as the bulk of the energy is focused well to the south of
the CWA across Colorado. Expect any chances for precipitation will
likely rapidly diminish by around 8 PM MST tonight. High-amplitude
upper-level ridging develops along the Rockies on Friday w/ 700 mb
temperatures climb to +2 to +4 C. Highs will be in the 60s to near
70 F along/east of I-25.

.LONG TERM...(Saturday - Thursday)
Issued at 303 AM MST Thu Mar 4 2021

High pressure ridging builds into the region as weaken Central
Plains low advects eastward. Drier and warmer conditions prevail
through the weekend ahead of upper trough and moisture-limited
frontal boundary for Sunday. Ahead of front on Saturday will see
a diurnal increase in winds for the afternoon mainly along and
west of the Laramie Range with gusts into the 30 mph range. Isolated
snow showers for the Sierra Madre Range for light accumulation on
Sunday. Moderate wind support aloft at 850 and 700mb for mixing
to surface on Tuesday ahead of deepening trough for again elevated
wind speeds into the 30s and 40s for southern gap areas. Long
range models still have difference with progression and impact of
deep trough in the region middle of next week though expect
periods of precipitation and cooler temperatures.

&&

.AVIATION...(For the 06Z TAFS through 06Z Friday night)
Issued at 935 PM MST Thu Mar 4 2021

VFR conditions expected to prevail through the forecast period for
all terminals. Current RADAR imagery has the main precipitation
band from the low pressure cell a bit too far to the south to
provide any significant showers across Southeastern Wyoming and
the Nebraska Panhandle. This cell is expected to continually dig
to the south/southeast, thus ending any precipitation chances for
the region.

&&

.FIRE WEATHER...
Issued at 242 AM MST Thu Mar 4 2021

Elevated fire weather concerns going into the weekend after a
passing low pressure system through CO today brings limited
precipitation south of the I-80 corridor. Best QPF chances for the
Sierra Madre Range with around 2" of snow possible. Min RHs
through Saturday across the high plains from the upper teens to
low 20s as warm and dry conditions set in once more. Remainder of
the period for the high plains should expect to have min RHs in
the 20 range. A quick shot of snow Sunday for Sierra Madre Range
as next potential widespread precipitation Tuesday and Wednesday.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...None.
NE...None.
&&

$$

SHORT TERM...CLH
LONG TERM...WM
AVIATION...MD
FIRE WEATHER...WM