Special Weather Statement, NWS Cheyenne, WY

Area Forecast Discussion
National Weather Service Cheyenne WY
1237 PM MDT Thu Jul 9 2026

.KEY MESSAGES...

- Slight Risk of severe thunderstorms this afternoon with heavy
  rainfall, hail, and strong gusty winds possible.

- Strong ridging aloft will produce a dry and hot period for
  Saturday through Thursday, with the primary challenges being
  the above normal heat and fire weather conditions.

&&

.SHORT TERM /THROUGH FRIDAY NIGHT/...
Issued at 1230 PM MDT Thu Jul 9 2026

Scattered rainfall and some thunderstorms are beginning to form
across the region this afternoon. Similar to yesterday,
expecting storms to continue forming across the high terrain and
move eastwards through the afternoon and early evening into a
more favorable environment for stronger activity. Profiles look
similar to yesterday as well, with high based storms from
inverted V soundings promoting strong winds and accumulating
small hail to some smaller severe hail sizes possible.
Meanwhile we'll see another risk of flooding today as PWAT
values continue to sit in the 0.9-1.25 inch range, generally
around 100-130% of average. With storms expected to train across
the I-80 corridor, look for the highest risk of flooding from
Cheyenne eastwards through Sidney. High resolution guidance
consolidates this activity into clustered to linear activity as
it moves eastwards into the Nebraska Panhandle, keeping high
winds the primary threat into the late afternoon, with storms
beginning to exit our portion of Nebraska during the beginning
of the evening hours. Our severe threat should then diminish by
the time the sun sets, though some lingering showers or storms
may be possible through around midnight.

Into Friday, our focus begins to shift towards heat as ridging
starts building over the region. While the warmth won't begin to
scorch us quite yet, high temperatures should rise around 1-5
degrees with highs in the 80's to 90's for the day. Some
lingering moisture will keep our PWAT values around normal, and
a weak trough and upslope flow may be able to take advantage of
what's left of the moisture to produce an isolated shower or
storm across the southern Laramie Range and along the border
into Colorado, but activity should be weak and sporadic at best.
By the evening, anything that is able to form will dissipate,
the last grasp of notable moisture potential as heat and fire
weather become the focal point into the long term.

&&

.LONG TERM /SATURDAY THROUGH WEDNESDAY/...
Issued at 1230 PM MDT Thu Jul 9 2026

Saturday through Thursday...Primary challenges will be the heat and
fire weather conditions. Ridging aloft dominates our region, with
quite dry air at low and mid levels, accompanied by warm 700 mb
temperatures, thus chances for late day showers and thunderstorms
will be nearly nil and non existent, and dry weather will prevail.
The 700 mb temperatures will yield maximum temperatures in the 90 to
105 degree range. A weak perturbation and a slight increase in mid
level moisture may spark isolated thunderstorms on Wednesday, and
moreso on Thursday, although the ridging aloft will likely keep it
dry for the entire period.

&&

.AVIATION /18Z TAFS THROUGH 18Z FRIDAY/...
Issued at 1118 AM MDT Thu Jul 9 2026

Storm activity will begin increasing across the region over the
next couple of hours. Any storms could produce MVFR or worse
conditions and gusty, variable winds, all sites except KRWL
where only weak activity is expected. Cloud banks this afternoon
will generally be around 10K feet at BKN, with lowered CIGs
under any storm activity. After storms move out later this
evening, expect CIGs to begin lifting and clearing, with clear
skies into tomorrow morning. Winds are messy thanks to shifting
boundaries across the region and the expected storm activity,
but look for prevailing winds to generally be around 10-20
knots, variable across our entire forecast area, becoming light
and variable overnight into tomorrow morning as strong pressure
gradients exit the region.

&&

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

&&

SHORT TERM...CG
LONG TERM...RUBIN
AVIATION...CG

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Special Weather Statement
National Weather Service Cheyenne WY
108 PM MDT Thu Jul 9 2026

WYZ117-118-091945-
Central Laramie County WY-South Laramie Range Foothills WY-
108 PM MDT Thu Jul 9 2026

...A STRONG THUNDERSTORM WILL IMPACT WEST CENTRAL LARAMIE COUNTY
THROUGH 145 PM MDT...

At 108 PM MDT, Doppler radar was tracking a strong thunderstorm near
Whitaker, or 20 miles northwest of Cheyenne, moving southeast at 20
mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Whitaker.

This includes Interstate 25 in Wyoming between mile markers 23 and
34.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4139 10502 4148 10497 4146 10473 4128 10479
TIME...MOT...LOC 1908Z 293DEG 16KT 4141 10495

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Goatley