Severe Thunderstorm Warning 343, NWS Denver/Boulder, CO

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Special Weather Statement
National Weather Service Denver CO
440 PM MDT Fri Aug 21 2026

COZ039-040-043-212330-
Central and South Weld County CO-North Douglas County Below
6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield
County CO-Boulder And Jefferson Counties Below 6000 Feet/West
Broomfield County CO-
440 PM MDT Fri Aug 21 2026

...A SHOWER WILL IMPACT DENVER...ARAPAHOE...SOUTHWESTERN WELD...
WESTERN ADAMS...BROOMFIELD...NORTHEASTERN JEFFERSON...NORTH CENTRAL
DOUGLAS AND BOULDER COUNTIES UNTIL 530 PM MDT...

At 440 PM MDT, Doppler radar was tracking a shower 5 miles northwest
of Denver, moving southeast at 5 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
  Denver, Aurora, eastern Lakewood, Thornton, Arvada, Westminster,
  Centennial, Broomfield, northern Highlands Ranch, Commerce City,
  Littleton, Northglenn, Brighton, Englewood, Wheat Ridge, Lafayette
  and Louisville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

Prepare for sudden gusty winds. Secure loose objects and move to a
safe shelter inside a building or vehicle.

&&

LAT...LON 3992 10521 4009 10501 3989 10450 3988 10450
      3960 10465 3962 10468 3961 10473 3958 10474
      3957 10477 3955 10476 3954 10504
TIME...MOT...LOC 2240Z 309DEG 5KT 3979 10499

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Aponte

Special Weather Statement
National Weather Service Denver CO
457 PM MDT Fri Aug 21 2026

COZ046-047-212330-
Southeast Elbert County Below 6000 Feet/South Lincoln County CO-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County CO-
457 PM MDT Fri Aug 21 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN LINCOLN COUNTY
UNTIL 530 PM MDT...

At 457 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles southeast of Arriba, or 28 miles east of Limon, moving
southeast at 5 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
  Mainly rural areas of Northeastern Lincoln County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3918 10327 3929 10316 3902 10316
TIME...MOT...LOC 2256Z 309DEG 5KT 3919 10319

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

Aponte

Special Weather Statement
National Weather Service Denver CO
508 PM MDT Fri Aug 21 2026

COZ040-041-220000-
Elbert/Central and East Douglas Counties Above 6000 Feet CO-North
Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe
Counties/East Broomfield County CO-
508 PM MDT Fri Aug 21 2026

...A SHOWER WILL IMPACT SOUTHEASTERN DENVER...ARAPAHOE...SOUTHWESTERN
ADAMS...NORTHWESTERN ELBERT AND NORTHEASTERN DOUGLAS COUNTIES UNTIL 6
PM MDT...

At 508 PM MDT, Doppler radar was tracking a shower over Centennial,
or 10 miles south of Denver, moving south at 15 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
  Southern Aurora, Centennial, Highlands Ranch, northern Castle Rock,
  Parker, northeastern Littleton, southern Englewood, Greenwood
  Village, Lone Tree, The Pinery, Arapahoe Park, Castle Pines,
  Buckley SFB, Sedalia, Cherry Hills Village, Foxfield and Cherry
  Creek Reservoir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

Prepare for sudden gusty winds. Secure loose objects and move to a
safe shelter inside a building or vehicle.

&&

LAT...LON 3962 10501 3975 10477 3958 10449 3955 10448
      3955 10446 3953 10446 3954 10445 3952 10444
      3954 10443 3954 10442 3951 10441 3934 10497
      3938 10495 3941 10495 3941 10497 3942 10498
TIME...MOT...LOC 2308Z 344DEG 13KT 3959 10488

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Aponte