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Home Return to list Severe Thunderstorm Warning 0015 Issued by the Denver / Boulder Forecast Office
Action: New Issued At: 2026-05-21 16:31:04
477
WUUS55 KBOU 212130
SVRBOU
COC005-212215-
/O.NEW.KBOU.SV.W.0015.260521T2130Z-260521T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
330 PM MDT Thu May 21 2026
The National Weather Service in Denver has issued a
* Severe Thunderstorm Warning for...
Central Arapahoe and Eastern Arapahoe County in northeastern
Colorado...
* Until 415 PM MDT.
* At 330 PM MDT, a severe thunderstorm was located 7 miles south of
Byers, or 35 miles northwest of Limon, moving east 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...
Deer Trail and Byers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.
&&
LAT...LON 3957 10422 3972 10424 3974 10401 3974 10390
3957 10388
PARTITION...508005 608005
TIME...MOT...LOC 2130Z 257DEG 16KT 3961 10419
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
63
Action: Continued Issued At: 2026-05-21 16:42:03
688
WWUS55 KBOU 212141
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
341 PM MDT Thu May 21 2026
COC005-212215-
/O.CON.KBOU.SV.W.0015.000000T0000Z-260521T2215Z/
Arapahoe CO-
341 PM MDT Thu May 21 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM MDT FOR
CENTRAL ARAPAHOE AND EASTERN ARAPAHOE COUNTY...
At 341 PM MDT, a severe thunderstorm was located 4 miles west of Deer
Trail, or 33 miles northwest of Limon, moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Deer Trail.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.
&&
LAT...LON 3957 10420 3973 10417 3974 10401 3974 10390
3957 10388
PARTITION...508005 608005
TIME...MOT...LOC 2130Z 257DEG 16KT 3961 10418
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
63
Action: Cancelled Issued At: 2026-05-21 17:01:05
305
WWUS55 KBOU 212200
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
400 PM MDT Thu May 21 2026
COC005-212210-
/O.CAN.KBOU.SV.W.0015.000000T0000Z-260521T2215Z/
Arapahoe CO-
400 PM MDT Thu May 21 2026
...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR CENTRAL ARAPAHOE AND
EASTERN ARAPAHOE COUNTY...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However, small hail, gusty
winds, and heavy rain are still possible with this thunderstorm.
&&
LAT...LON 3957 10420 3973 10417 3974 10401 3974 10390
3957 10388
PARTITION...508005 608005
TIME...MOT...LOC 2141Z 257DEG 16KT 3962 10412
$$
63
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