Severe Thunderstorm Watch
SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 596
NWS STORM PREDICTION CENTER NORMAN OK
230 PM MDT TUE AUG 18 2026
SEVERE THUNDERSTORM WATCH 596 IS IN EFFECT UNTIL 900 PM MDT
FOR THE FOLLOWING LOCATIONS
WYC003-019-029-033-043-190300-
/O.NEW.KWNS.SV.A.0596.260818T2030Z-260819T0300Z/
WY
. WYOMING COUNTIES INCLUDED ARE
BIG HORN JOHNSON PARK
SHERIDAN WASHAKIE
$$
ATTN...WFO...BYZ...RIW...
Special Weather Statement
Special Weather Statement
National Weather Service Cheyenne WY
450 PM MDT Tue Aug 18 2026
NEZ019-020-WYZ108-182315-
Scotts Bluff NE-Banner NE-Goshen County WY-
450 PM MDT Tue Aug 18 2026
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN SCOTTS BLUFF...
NORTHWESTERN BANNER AND SOUTHEASTERN GOSHEN COUNTIES THROUGH 515 PM
MDT...
At 450 PM MDT, Doppler radar was tracking a strong thunderstorm near
Hawk Springs, or 21 miles southwest of Torrington, moving east at 50
mph.
HAZARD...Wind gusts up to 50 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
La Grange, Hawk Springs Reservoir, Hawk Springs State Recreation
Area, Hawk Springs, Wycross, and Hawk Springs Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4160 10412 4159 10413 4160 10413 4175 10447
4190 10443 4184 10384 4152 10394
TIME...MOT...LOC 2250Z 286DEG 45KT 4179 10437
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
$$
Goatley
Air Quality Alert
COC014-013-035-069-059-123-031-001-005-192200-
Broomfield-Boulder-Douglas-Larimer-Jefferson-Weld-Denver-
Adams-Arapahoe-
410 PM MDT Tue Aug 18 2026
...OZONE ACTION DAY ALERT FROM 400 PM TUESDAY UNTIL 400 PM
WEDNESDAY...
The Colorado Department of Public Health and Environment has
issued the following...
WHAT...Ozone Action Day Alert.
WHERE...Douglas, Jefferson, Denver, western Arapahoe, western
Adams, Broomfield, Boulder, Larimer, and Weld Counties
WHEN...400 PM Tuesday August 18 to 400 PM Wednesday August 19
IMPACTS...Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor. Hot and sunny weather with light winds and
limited potential for afternoon storms will allow ozone to reach
levels that are Unhealthy for Sensitive Groups on Tuesday and
Wednesday. The highest ozone concentrations are most likely in the
southern and western portions of the Denver Metro area. For
Colorado air quality conditions, forecasts, and advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx If
possible, please help us reduce ozone pollution by limiting
driving gas and diesel-powered vehicles until at least 4 p.m.
Wednesday, August 19, 2026. Colorado is also addressing ozone
pollution through state policies. For more information about
health impacts and how ozone pollution forms in Colorado, visit:
https://cdphe.colorado.gov/ozone-pollution-and-your-health
HEALTH INFORMATION...Increasing likelihood of respiratory symptoms
and breathing discomfort in active children and adults and people
with lung disease, such as asthma. Active children and adults, and
people with lung disease, such as asthma, should reduce prolonged
or heavy outdoor exertion.
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service North Platte NE
341 PM CDT Tue Aug 18 2026
NEZ004>010-022>029-035>038-056>059-069>071-094-192045-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-Grant-
Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-Logan-
Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
341 PM CDT Tue Aug 18 2026 /241 PM MDT Tue Aug 18 2026/
This Hazardous Weather Outlook is for portions of western and north
central Nebraska.
.DAY ONE...This afternoon and tonight.
Isolated to scattered thunderstorms are possible across the area
this evening and tonight. A few storms could be strong to severe.
Damaging winds, large hail, and locally heavy rainfall look to be the
primary threats.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Isolated to scattered thunderstorms chances continue Wednesday and
Thursday across western and north central Nebraska, with locally
heavy rainfall possible each day. A couple of storms could be strong
to severe through Thursday, with large hail and damaging winds as the
primary threats.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected to be needed at this time.
$$
Taylor
