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Home Return to list Severe Thunderstorm Warning 0299 Issued by the Denver / Boulder Forecast Office
Action: New Issued At: 2026-08-12 18:26:28
538
WUUS55 KBOU 122326
SVRBOU
COC075-087-121-130015-
/O.NEW.KBOU.SV.W.0299.260812T2326Z-260813T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
526 PM MDT Wed Aug 12 2026
The National Weather Service in Denver has issued a
* Severe Thunderstorm Warning for...
Southwestern Logan County in northeastern Colorado...
Northeastern Morgan County in northeastern Colorado...
Northeastern Washington County in northeastern Colorado...
* Until 615 PM MDT.
* At 526 PM MDT, severe thunderstorms were located along a line from
near Willard to 13 miles north of Arickaree School, or along a line
from 17 miles west of Sterling to 20 miles southeast of Akron,
moving northeast at 20 mph.
HAZARD...60 mph wind gusts and small hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Sterling, Akron, Otis, Merino, Platner, Prewitt Reservoir, Atwood,
Logan Corners, Willard, Pawnee Pass, Fremont Butte, Messex and
Hyde.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. These storms are capable of producing damaging winds.
&&
LAT...LON 4052 10355 4059 10358 4060 10358 4070 10322
4053 10314 4033 10299 4014 10279 4000 10279
4000 10280 3996 10280 3989 10300 4008 10332
4027 10340
TIME...MOT...LOC 2325Z 239DEG 15KT 4058 10351 4032 10334 4009 10323
3992 10300
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
63
Action: Continued Issued At: 2026-08-12 18:39:58
959
WWUS55 KBOU 122339
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
539 PM MDT Wed Aug 12 2026
COC075-087-121-130015-
/O.CON.KBOU.SV.W.0299.000000T0000Z-260813T0015Z/
Logan CO-Morgan CO-Washington CO-
539 PM MDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM MDT FOR
SOUTHWESTERN LOGAN, EASTERN MORGAN AND NORTHEASTERN WASHINGTON
COUNTIES...
At 539 PM MDT, severe thunderstorms were located along a line from
near Pawnee Pass to 14 miles south of Otis, or along a line from 13
miles west of Sterling to 21 miles southeast of Akron, moving
northeast at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Sterling, Akron, Otis, Merino, Platner, Prewitt Reservoir, Atwood,
Logan Corners, Willard, Pawnee Pass, Fremont Butte, Messex and
Hyde.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. These storms are capable of producing damaging winds and
large hail.
&&
LAT...LON 4052 10355 4059 10358 4060 10358 4070 10322
4053 10314 4033 10299 4014 10279 4000 10279
4000 10280 3996 10280 3989 10300 4009 10321
4027 10336
TIME...MOT...LOC 2326Z 239DEG 15KT 4058 10351 4028 10336 4009 10316
3993 10299
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
63
Action: Cancelled Issued At: 2026-08-12 18:53:59
432
WWUS55 KBOU 122353
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
553 PM MDT Wed Aug 12 2026
COC087-130003-
/O.CAN.KBOU.SV.W.0299.000000T0000Z-260813T0015Z/
Morgan CO-
553 PM MDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR EASTERN MORGAN
COUNTY...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM MDT
Wednesday for a portion of northeast Colorado.
&&
LAT...LON 4060 10344 4063 10346 4070 10322 4053 10314
4033 10299 4014 10279 4000 10279 4000 10280
3996 10280 3993 10287 4009 10304 4028 10326
4054 10335
TIME...MOT...LOC 2339Z 239DEG 15KT 4061 10344 4031 10329 4012 10309
3996 10293
$$
COC075-121-130015-
/O.CON.KBOU.SV.W.0299.000000T0000Z-260813T0015Z/
Logan CO-Washington CO-
553 PM MDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM MDT FOR
SOUTHWESTERN LOGAN AND NORTHEASTERN WASHINGTON COUNTIES...
At 553 PM MDT, severe thunderstorms were located along a line from
over Logan Corners to 13 miles southeast of Otis, or along a line
from 9 miles west of Sterling to 22 miles southeast of Akron, moving
northeast at 20 mph.
HAZARD...60 mph wind gusts and small hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Sterling, Otis, Platner, Atwood, Logan Corners and Hyde.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. These storms are capable of producing damaging winds.
&&
LAT...LON 4060 10344 4063 10346 4070 10322 4053 10314
4033 10299 4014 10279 4000 10279 4000 10280
3996 10280 3993 10287 4009 10304 4028 10326
4054 10335
TIME...MOT...LOC 2339Z 239DEG 15KT 4061 10344 4031 10329 4012 10309
3996 10293
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
63
Action: Continued Issued At: 2026-08-12 18:53:59
432
WWUS55 KBOU 122353
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
553 PM MDT Wed Aug 12 2026
COC087-130003-
/O.CAN.KBOU.SV.W.0299.000000T0000Z-260813T0015Z/
Morgan CO-
553 PM MDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR EASTERN MORGAN
COUNTY...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM MDT
Wednesday for a portion of northeast Colorado.
&&
LAT...LON 4060 10344 4063 10346 4070 10322 4053 10314
4033 10299 4014 10279 4000 10279 4000 10280
3996 10280 3993 10287 4009 10304 4028 10326
4054 10335
TIME...MOT...LOC 2339Z 239DEG 15KT 4061 10344 4031 10329 4012 10309
3996 10293
$$
COC075-121-130015-
/O.CON.KBOU.SV.W.0299.000000T0000Z-260813T0015Z/
Logan CO-Washington CO-
553 PM MDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM MDT FOR
SOUTHWESTERN LOGAN AND NORTHEASTERN WASHINGTON COUNTIES...
At 553 PM MDT, severe thunderstorms were located along a line from
over Logan Corners to 13 miles southeast of Otis, or along a line
from 9 miles west of Sterling to 22 miles southeast of Akron, moving
northeast at 20 mph.
HAZARD...60 mph wind gusts and small hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Sterling, Otis, Platner, Atwood, Logan Corners and Hyde.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. These storms are capable of producing damaging winds.
&&
LAT...LON 4060 10344 4063 10346 4070 10322 4053 10314
4033 10299 4014 10279 4000 10279 4000 10280
3996 10280 3993 10287 4009 10304 4028 10326
4054 10335
TIME...MOT...LOC 2339Z 239DEG 15KT 4061 10344 4031 10329 4012 10309
3996 10293
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
63
Action: Expired Issued At: 2026-08-12 19:15:30
215
WWUS55 KBOU 130015
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
615 PM MDT Wed Aug 12 2026
COC075-121-130025-
/O.EXP.KBOU.SV.W.0299.000000T0000Z-260813T0015Z/
Logan CO-Washington CO-
615 PM MDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING HAS EXPIRED FOR SOUTHWESTERN LOGAN AND
NORTHEASTERN WASHINGTON COUNTIES...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire.
A Severe Thunderstorm Watch remains in effect until 900 PM MDT
Wednesday for a portion of northeast Colorado.
&&
LAT...LON 4060 10344 4063 10346 4070 10322 4053 10314
4033 10299 4014 10279 4000 10279 4000 10280
3996 10280 3993 10287 4009 10304 4028 10326
4054 10335
TIME...MOT...LOC 2353Z 239DEG 15KT 4064 10337 4034 10323 4015 10302
3999 10286
$$
63
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