Severe Thunderstorm Warning 13, NWS Cheyenne, WY

784 
WWUS55 KCYS 292318
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Severe Weather Statement
National Weather Service Cheyenne WY
518 PM MDT Fri May 29 2026

WYC015-292345-
/O.CON.KCYS.SV.W.0013.000000T0000Z-260529T2345Z/
Goshen WY-
518 PM MDT Fri May 29 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MDT
FOR SOUTHEASTERN GOSHEN COUNTY...

At 518 PM MDT, severe thunderstorms were located along a line from 
east of Yoder towards east of Hawk Springs, moving northwest at 20 
mph. 

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Yoder, Henry, Huntley, Hawk Springs Reservoir, Southern Hills
Estates, Hawk Springs, Hawk Springs State Recreation Area, Wycross,
and Hawk Springs Campground.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4167 10429 4190 10435 4202 10421 4201 10405
      4166 10405
TIME...MOT...LOC 2318Z 156DEG 17KT 4191 10420 4172 10415 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Natoli

475 
WWUS55 KCYS 292335
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
535 PM MDT Fri May 29 2026

WYC015-292345-
/O.EXP.KCYS.SV.W.0013.000000T0000Z-260529T2345Z/
Goshen WY-
535 PM MDT Fri May 29 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GOSHEN COUNTY
WILL EXPIRE AT 545 PM MDT...

The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However, small
hail and heavy rain are still possible with these thunderstorms.

&&

LAT...LON 4167 10429 4190 10435 4202 10421 4201 10405
      4166 10405
TIME...MOT...LOC 2335Z 147DEG 28KT 4201 10429 4182 10424 

$$

Natoli

Area Forecast Discussion
National Weather Service Cheyenne WY
232 PM MDT Fri May 29 2026

.KEY MESSAGES...

- An unsettled weather pattern will continue into the weekend
  with daily chances for afternoon/evening showers and
  thunderstorms.

- Strong to severe thunderstorms could be possible on Saturday.
  Storms may produce damaging winds and large hail.

&&

.SHORT TERM /THROUGH SATURDAY NIGHT/...
Issued at 231 PM MDT Fri May 29 2026

Much of the low-level moisture we woke up to this morning has mixed
out, as dewpoints across SE Wyoming have dropped into the 40s east
of the Laramie Range thanks to heating/insolation. At the time of
this discussion, sites across the Nebraska Panhandle are seeing
surface dewpoints in the mid-50s and are beginning to see shallow
cumulus develop based on visible satellite imagery. SPC Mesoanalysis
currently shows MLCAPE of 500-1000 J/Kg east of the I-25 corridor
with some deeper reflectivity returns along and just north of the
Cheyenne Ridge. However with effective bulk shear of around 20
knots, supercells today are unlikely and storms are expected to be
rather short-lived. With plenty of near-surface vorticity combined
with 0-3 km lapse rates of 9.5 degC/km (nearly dry adiabatic), would
not be surprised to see a landspout tornado occur if a developing
updraft manages to sit atop a localized, terrain-induced boundary
under prevailing SE flow in the lee of the Cheyenne Ridge.
Otherwise, the main hazards with any stronger thunderstorms will be
gusty winds of 50-60 knots, small hail, and frequent lightning. We
should see most of the shower and thunderstorm activity move east of
Wyoming and the Nebraska Panhandle by 06Z as any rain-cooled air and
nocturnal cooling after sunset should erode most of our instability.

GOES-19 mid-level water vapor imagery is showing a robust negatively-
tilted shortwave trough located over the Desert Southwest that is
ejecting north and east and will become the main feature of interest
on Saturday, particularly for the Nebraska Panhandle, hence the
Storm Prediction Center placing much of Dawes County in a Day 2
slight risk for severe weather. A 45 knot 500 mb speed maximum is
expected to pivot around the base of the wave located over SE
Wyoming and Western Nebraska on Saturday afternoon, providing a
source for deep-layer vertical wind shear and the potential for
organized deep convection. Low-level theta-e advection will take
place during the day across the eastern Nebraska Panhandle ahead of
a weak dryline, with the strongest isodrosothermal gradient located
south of the Kansas-Nebraska border. In the warm sector, surface
dewpoints are expected to remain in the mid-50s per high resolution
ensemble guidance with temperatures expected to reach the upper 70s
to low 80s. The upstream shortwave trough is expected to initiate
showers and thunderstorms over the higher terrain around 18-20Z
before moving NE over lower elevations. With an effective bulk wind
difference of 25-30 knots combined with 1500-2000 J/Kg MLCAPE in the
warm sector, supercells remain possible across the Nebraska
Panhandle late afternoon into the evening hours. Forecast soundings
indicate LCLs around 1500m across the northern Nebraska Panhandle,
which is well within the realm (near the 50th percentile) of tornado
climatology. The main failure mode for tornadoes tomorrow will be
the lack of low-level shear, as 850 mb flow remains weak around 10-
15 knots before gradually ramping up to 20 knots after 03Z with the
onset of a weak low-level jet, however storms look to be elevated at
this time, therefore limiting the tornado threat. The main threats
tomorrow will be large hail and damaging winds, especially with any
sustained rotating updrafts where hail has a longer residence time
within the cloud (to allow for maximum accretion and growth). Storms
should begin to exit the Nebraska Panhandle after 06Z Sunday.

Focus shifts to high winds for our wind-prone areas of Wyoming late
Saturday night into Sunday morning. 700 mb cross-barrier flow
increases to 50 knots overnight, with in-house guidance continuing
to show Arlington with 65% probabilities of exceeding high wind
criteria into Sunday morning, with Bordeaux at about 40%. Model
cross-sections show a mountain-top stable layer with strong downward
omega signatures in the lee of the Snowy and Laramie Ranges, so
these probabilities for high winds seem appropriate at this
time.

&&

.LONG TERM /SUNDAY THROUGH THURSDAY/...
Issued at 231 PM MDT Fri May 29 2026

The long term will remain as unsettled as the short term with near
daily chances of precipitation through at least mid-week. With
the upper-level trough responsible for Saturday's storm expected
to eject northeastward out if the area Sunday, precipitation
chances on Sunday will be rather slim. Lingering showers could
be possible for the northern Wyoming and Nebraska zones of the
forecast area as the system ejects into the Dakotas, but even
these chances look rather slim.

Precipitation chances will increase for the start of the work week
as the upper-level trough/low begins to retrograde back towards the
northwest. The rough location of the low over the Montana/Canada
border, will allow the CWA to once again tap into moisture from the
Gulf. Moisture-rich mid-level southerly flow will usher in the
necessary humidity to fuel storm develop during the afternoon and
evening. Lift will come in the form of vorticity maxes streaming
through the area from the trough to the north, as well as another
trough the enters the picture during the middle of next week. At
this point, global models seem fairly consistent on showing daily
storm chances east of the Laramie Range Monday through Thursday. A
quick look at model soundings for areas east of the Laramie Range
show moderate amounts of CAPE each afternoon as well as decent shear
most days. As a result, severe weather cannot be ruled out each
afternoon.

&&

.AVIATION /18Z TAFS THROUGH 18Z SATURDAY/...
Issued at 1140 AM MDT Fri May 29 2026

The main aviation concern this afternoon will be scattered strong to
potentially severe thunderstorms. Thunderstorms over or in the
vicinity of a terminal could cause gusty and erratic winds. Cannot
rule out 50 kt gusts within storms or small hail. Visibility could
drop to MVFR conditions at times in moderate to heavy rain. Storms
will begin to move out of the area late tonight, however the
increased moisture will likely lead to the development of a low
stratus deck over the Nebraska panhandle. Low CIGs will create
MVFR/IFR conditions late Friday night and into Saturday morning.

&&

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

&&

SHORT TERM...NB
LONG TERM...SF
AVIATION...SF

Special Weather Statement
National Weather Service Cheyenne WY
403 PM MDT Fri May 29 2026

WYZ117-118-292245-
Central Laramie County WY-South Laramie Range Foothills WY-
403 PM MDT Fri May 29 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL LARAMIE COUNTY
THROUGH 445 PM MDT...

At 403 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles east of Bison Crossing, or 10 miles southeast of Cheyenne,
moving northwest at 10 mph.

HAZARD...Wind gusts up to 40 mph and penny size 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...
Cheyenne, South Greeley Highway, Fox Farm-College, South Cheyenne,
Bison Crossing, Cowboy Ranch South, and Grass Hills.

This includes Interstate 80 in Wyoming between mile markers 362 and
368.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4112 10482 4115 10470 4112 10458 4100 10458
      4100 10480
TIME...MOT...LOC 2203Z 144DEG 9KT 4102 10468

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

Natoli

Special Weather Statement
National Weather Service Cheyenne WY
404 PM MDT Fri May 29 2026

WYZ107-108-292230-
East Platte County WY-Goshen County WY-
404 PM MDT Fri May 29 2026

...A STRONG THUNDERSTORM WILL IMPACT WEST CENTRAL GOSHEN AND EAST
CENTRAL PLATTE COUNTIES THROUGH 430 PM MDT...

At 404 PM MDT, Doppler radar was tracking a strong thunderstorm 10
miles southeast of Grayrocks Reservoir, or 18 miles east of
Wheatland, moving northwest at 15 mph.

HAZARD...Wind gusts up to 40 mph and nickel size hail.

SOURCE...Radar indicated.

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

This storm will remain over mainly rural areas of west central Goshen
and east central Platte Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4204 10447 4193 10459 4203 10480 4216 10468
TIME...MOT...LOC 2204Z 125DEG 11KT 4203 10461

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

Natoli

Special Weather Statement
National Weather Service Cheyenne WY
412 PM MDT Fri May 29 2026

WYZ118-119-292300-
Central Laramie County WY-East Laramie County WY-
412 PM MDT Fri May 29 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN LARAMIE COUNTY
THROUGH 500 PM MDT...

At 411 PM MDT, Doppler radar was tracking a strong thunderstorm
capable of producing a landspout near Egbert, or 26 miles east of
Cheyenne, moving northwest at 10 mph.

HAZARD...Landspouts, wind gusts up to 40 mph, and half inch hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Burns, Egbert, Pine Bluffs Municipal Airport, and Carpenter.

This includes Interstate 80 in Wyoming between mile markers 383 and
399.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4120 10409 4101 10414 4104 10445 4123 10442
TIME...MOT...LOC 2211Z 123DEG 11KT 4112 10428

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

Natoli

Special Weather Statement
National Weather Service Cheyenne WY
432 PM MDT Fri May 29 2026

NEZ020-054-WYZ119-292300-
Kimball NE-Banner NE-East Laramie County WY-
432 PM MDT Fri May 29 2026

...STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN KIMBALL...
SOUTHWESTERN BANNER AND EAST CENTRAL LARAMIE COUNTIES THROUGH 500 PM
MDT...

At 432 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 9 miles east of Albin to Pine Bluffs. Movement
was northwest at 15 mph.

HAZARD...Wind gusts up to 40 mph and nickel size 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...
Pine Bluffs, Bushnell, and Oliver Reservoir.

This includes the following highways...
 Interstate 80 in Wyoming between mile markers 400 and 402.
 Interstate 80 in Nebraska between mile markers 1 and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4151 10403 4116 10414 4110 10388 4144 10374
TIME...MOT...LOC 2232Z 148DEG 14KT 4140 10392 4120 10405

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

Natoli

Preliminary Local Storm Report
National Weather Service Cheyenne WY
437 PM MDT Fri May 29 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0432 PM     Hail             14 NNW Bushnell         41.43N 103.96W
05/29/2026  M0.75 Inch       Banner             NE   Trained Spotter

            Trained spotter reported penny-sized hail.

&&

NSB

Special Weather Statement
National Weather Service Cheyenne WY
448 PM MDT Fri May 29 2026

NEZ020-054-WYZ108-118-119-292330-
Kimball NE-Banner NE-Goshen County WY-Central Laramie County WY-
East Laramie County WY-
448 PM MDT Fri May 29 2026

...STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN KIMBALL...WESTERN
BANNER...SOUTHEASTERN GOSHEN AND NORTHEASTERN LARAMIE COUNTIES
THROUGH 530 PM MDT...

At 448 PM MDT, Doppler radar was tracking strong thunderstorms
capable of producing a landspout along a line extending from near
Albin to near Pine Bluffs. Movement was north at 15 mph.

HAZARD...Landspouts, wind gusts up to 40 mph, and nickel size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Pine Bluffs, La Grange, and Albin.

This includes Interstate 80 in Nebraska between mile markers 2 and 5.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4167 10427 4165 10385 4118 10396 4122 10442
TIME...MOT...LOC 2248Z 184DEG 13KT 4147 10408 4126 10404

LANDSPOUT...POSSIBLE
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

Natoli