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Home Return to list Severe Thunderstorm Warning 0405 Issued by the Denver / Boulder Forecast Office
Action: New Issued At: 2026-09-20 16:02:28
561
WUUS55 KBOU 202101
SVRBOU
COC073-202145-
/O.NEW.KBOU.SV.W.0405.260920T2101Z-260920T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
301 PM MDT Sun Sep 20 2026
The National Weather Service in Denver has issued a
* Severe Thunderstorm Warning for...
Northeastern Lincoln County in east central Colorado...
* Until 345 PM MDT.
* At 301 PM MDT, a severe thunderstorm was located 7 miles southwest
of Arriba, or 18 miles east of Limon, moving southeast at 25 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Trained spotters reported half dollar size hail 2 miles
south of Genoa at 1:45pm.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees. Hail may accumulate on roadways
causing hazardous travel.
* Locations impacted include...
Hugo and Arriba.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and has
produced large hail.
&&
LAT...LON 3907 10351 3931 10343 3941 10316 3894 10317
TIME...MOT...LOC 2101Z 295DEG 20KT 3921 10337
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MV
Action: Correction Issued At: 2026-09-20 16:04:29
620
WUUS55 KBOU 202104 CCA
SVRBOU
COC073-202145-
/O.COR.KBOU.SV.W.0405.260920T2101Z-260920T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning...CORRECTED
National Weather Service Denver CO
304 PM MDT Sun Sep 20 2026
The National Weather Service in Denver has issued a
* Severe Thunderstorm Warning for...
Northeastern Lincoln County in east central Colorado...
* Until 345 PM MDT.
* At 301 PM MDT, a severe thunderstorm was located 7 miles southwest
of Arriba, or 19 miles east of Limon, moving southeast at 25 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Trained spotters reported half dollar size hail 2 miles
south of Genoa at 2:45pm.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees. Hail may accumulate on roadways
causing hazardous travel.
* Locations impacted include...
Hugo and Arriba.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and has
produced large hail.
&&
LAT...LON 3907 10351 3931 10343 3941 10316 3894 10317
TIME...MOT...LOC 2101Z 295DEG 20KT 3921 10337
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MV
Action: Continued Issued At: 2026-09-20 16:09:59
686
WWUS55 KBOU 202109
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
309 PM MDT Sun Sep 20 2026
COC073-202145-
/O.CON.KBOU.SV.W.0405.000000T0000Z-260920T2145Z/
Lincoln CO-
309 PM MDT Sun Sep 20 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MDT FOR
EAST CENTRAL LINCOLN COUNTY...
At 309 PM MDT, a severe thunderstorm was located 7 miles southwest of
Arriba, or 20 miles east of Limon, moving southeast at 20 mph.
HAZARD...Two inch hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees. Hail may accumulate on
roadways causing hazardous travel.
Locations impacted include...
Arriba.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
dangerous hail and damaging winds.
&&
LAT...LON 3906 10347 3931 10340 3941 10316 3894 10317
TIME...MOT...LOC 2101Z 296DEG 19KT 3921 10337
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MV
Action: Continued Issued At: 2026-09-20 16:26:29
189
WWUS55 KBOU 202125
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
325 PM MDT Sun Sep 20 2026
COC073-202145-
/O.CON.KBOU.SV.W.0405.000000T0000Z-260920T2145Z/
Lincoln CO-
325 PM MDT Sun Sep 20 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MDT FOR
EAST CENTRAL LINCOLN COUNTY...
At 325 PM MDT, a severe thunderstorm was located 12 miles south of
Arriba, or 26 miles southeast of Limon, moving southeast at 35 mph.
HAZARD...Tennis ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees. Hail may accumulate on
roadways causing hazardous travel.
Locations impacted include...
Mainly rural areas of East Central Lincoln County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
dangerous hail and damaging winds.
&&
LAT...LON 3906 10347 3925 10334 3923 10316 3894 10317
TIME...MOT...LOC 2109Z 294DEG 36KT 3917 10344
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MV
Action: Continued Issued At: 2026-09-20 16:37:59
617
WWUS55 KBOU 202137
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
337 PM MDT Sun Sep 20 2026
COC073-202145-
/O.CON.KBOU.SV.W.0405.000000T0000Z-260920T2145Z/
Lincoln CO-
337 PM MDT Sun Sep 20 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MDT FOR
EAST CENTRAL LINCOLN COUNTY...
At 337 PM MDT, a severe thunderstorm was located 10 miles north of
Boyero, or 28 miles southeast of Limon, moving southeast at 30 mph.
HAZARD...Tennis ball size hail and 60 mph wind gusts.
SOURCE...Trained spotters reported tennis ball size hail near
Wareland at 3:33pm.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees. Hail may accumulate on
roadways causing hazardous travel.
Locations impacted include...
Mainly rural areas of East Central Lincoln County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm has produced dangerous hail
and is capable of producing damaging winds.
&&
LAT...LON 3903 10339 3923 10332 3923 10316 3894 10317
TIME...MOT...LOC 2125Z 303DEG 25KT 3911 10331
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...OBSERVED
MAX HAIL SIZE...2.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MV
Action: Expired Issued At: 2026-09-20 16:42:59 713 WWUS55 KBOU 202142 SVSBOU Severe Weather Statement National Weather Service Denver CO 342 PM MDT Sun Sep 20 2026 COC073-202152- /O.EXP.KBOU.SV.W.0405.000000T0000Z-260920T2145Z/ Lincoln CO- 342 PM MDT Sun Sep 20 2026 ...SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 345 PM MDT FOR EAST CENTRAL LINCOLN COUNTY... The Severe Thunderstorm Warning that was previously in effect has been reissued for Lincoln County and is in effect until 415 PM MDT. Please refer to that bulletin for the latest severe weather information. && LAT...LON 3903 10339 3923 10332 3923 10316 3894 10317 TIME...MOT...LOC 2137Z 303DEG 25KT 3906 10322 $$ MV | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||