Alerts from NWS Denver/Boulder CO (UNOFFICIAL)
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Alerts from NWS Denver/Boulder CO (UNOFFICIAL)
@bou.nws-bot.us
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Unofficial bot sharing alerts from NWS Denver/Boulder CO.

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Dense Fog Advisory issued November 22 at 4:46AM MST until November 22 at 10:00AM MST by NWS Denver CO
Additional Details Here.
* WHAT...Visibility less than one mile in dense fog. * WHERE...Greeley, and Fort Morgan. Fog has been reported across portions of I-25, US-85, and I-76. * WHEN...Until 10 AM MST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.
November 22, 2025 at 12:00 PM
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Winter Weather Advisory issued November 17 at 3:36AM MST until November 17 at 5:00PM MST by NWS Denver CO
Additional Details Here.
* WHAT...Snow. Additional snow accumulations of 3 to 6 inches, with higher totals possible north of Rabbit Ears Pass. Winds gusting as high as 50 mph. * WHERE...Rabbit Ears Pass. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Snow covered roads will make travel hazardous, especially through mountain passes. Use caution when traveling.
November 17, 2025 at 10:45 AM
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Winter Weather Advisory issued November 16 at 2:59PM MST until November 17 at 5:00PM MST by NWS Denver CO
Additional Details Here.
* WHAT...Snow expected. Total snow accumulations between 4 and 10 inches, with higher totals possible north of Rabbit Ears Pass. Winds gusting as high as 50 mph. * WHERE...Rabbit Ears Pass. * WHEN...From 8 PM this evening to 5 PM MST Monday. * IMPACTS...Snow covered roads will make travel hazardous, especially through mountain passes. Use caution when traveling.
November 16, 2025 at 10:00 PM
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Winter Weather Advisory issued November 16 at 2:27AM MST until November 17 at 5:00PM MST by NWS Denver CO
Additional Details Here.
* WHAT...Snow expected. Total snow accumulations between 3 and 8 inches, with higher totals possible above 10,000 feet. Winds gusting as high as 50 mph. * WHERE...Rabbit Ears Pass. * WHEN...From 8 PM this evening to 5 PM MST Monday. * IMPACTS...Snow covered roads will make travel hazardous, especially through mountain passes. Use caution when traveling.
November 16, 2025 at 9:30 AM
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🚨 Red Flag Warning issued November 6 at 7:21AM MST until November 6 at 5:00PM MST by NWS Denver CO 🚨
Additional Details Here.
The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 5 PM MST this afternoon. * AFFECTED AREA...Fire Weather Zones 238 and 239. * TIMING...Until 5 PM MST this afternoon. * WINDS...West 25 to 35 mph with gusts up to 55 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire.
November 6, 2025 at 2:30 PM
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Freeze Warning issued October 28 at 9:52AM MDT until October 29 at 10:00AM MDT by NWS Denver CO
Additional Details Here.
* WHAT...Lows between 19 and 25 degrees are expected Tuesday night into Wednesday morning. * WHERE...Fort Collins, Boulder and the western suburbs of Denver, and Denver. * WHEN...From 10 PM this evening to 10 AM MDT Wednesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Some areas within these zones have already experienced a killing freeze, particularly Weld County, Longmont and vicinity, and the northeast Denver metro. However, many of the more urban locations remain susceptible, and are expected to see a killing freeze Tuesday night.
October 28, 2025 at 4:00 PM
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Freeze Warning issued October 27 at 8:51PM MDT until October 28 at 10:00AM MDT by NWS Denver CO
Additional Details Here.
* WHAT...For the first Freeze Warning, sub-freezing temperatures as low as 26 expected. For the second Freeze Warning, sub-freezing temperatures as low as 19 expected. * WHERE...Fort Collins, Boulder and the western suburbs of Denver, Denver, and Castle Rock. * WHEN...For the first Freeze Warning, from 2 AM to 10 AM MDT Tuesday. For the second Freeze Warning, from 10 PM Tuesday to 10 AM MDT Wednesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * WHAT...For the first Freeze Warning, sub-freezing temperatures as low as 26 expected. For the second Freeze Warning, sub-freezing temperatures as low as 19 expected. * WHERE...Fort Collins, Boulder and the western suburbs of Denver, Denver, and Castle Rock. * WHEN...For the first Freeze Warning, from 2 AM to 10 AM MDT Tuesday. For the second Freeze Warning, from 10 PM Tuesday to 10 AM MDT Wednesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
October 28, 2025 at 3:00 AM
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Special Weather Statement issued October 27 at 7:21PM MDT by NWS Denver CO
Additional Details Here.
At 721 PM MDT, Doppler radar was tracking a line of strong thunderstorms extending from 5 miles northwest of Boyero to 6 miles southeast of Karval, or extending from 28 miles southeast of Limon to 43 miles south of Limon, moving east at 35 mph. HAZARD...Wind gusts of 50 to 55 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... Boyero and Karval.
October 28, 2025 at 1:30 AM
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Special Weather Statement issued October 27 at 6:55PM MDT by NWS Denver CO
Additional Details Here.
At 655 PM MDT, Doppler radar was tracking a line of strong thunderstorms extending from 9 miles south of Limon to 7 miles south of Kutch, or extending from 9 miles south of Limon to 33 miles south of Limon, moving east at 30 mph. HAZARD...Wind gusts of 50 to 55 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... Hugo, Punkin Center and Karval.
October 28, 2025 at 1:00 AM
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Special Weather Statement issued October 27 at 6:31PM MDT by NWS Denver CO
Additional Details Here.
At 631 PM MDT, Doppler radar was tracking a line of strong thunderstorms extending from 4 miles northeast of Matheson to 10 miles south of Simla, or extending from 14 miles west of Limon to 27 miles southwest of Limon, moving southeast at 30 mph. HAZARD...Wind gusts of 50 to 55 mph and half inch 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... Matheson and Kutch.
October 28, 2025 at 12:45 AM
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Special Weather Statement issued October 27 at 6:26PM MDT by NWS Denver CO
Additional Details Here.
At 626 PM MDT, Doppler radar was tracking a strong thunderstorm 5 miles south of Boyero, or 37 miles southeast of Limon, moving southeast at 35 mph. HAZARD...Wind gusts up to 50 mph and nickel 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... Boyero.
October 28, 2025 at 12:30 AM
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Special Weather Statement issued October 27 at 6:07PM MDT by NWS Denver CO
Additional Details Here.
At 607 PM MDT, Doppler radar was tracking a strong thunderstorm 11 miles southeast of Kiowa, or 32 miles west of Limon, moving east at 25 mph. HAZARD...Wind gusts up to 50 mph and half inch 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... Simla and Matheson.
October 28, 2025 at 12:15 AM
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🚨 Severe Thunderstorm Warning issued October 27 at 6:08PM MDT until October 27 at 6:30PM MDT by NWS Denver CO 🚨
Additional Details Here.
At 608 PM MDT, a severe thunderstorm was located 9 miles west of Boyero, or 26 miles southeast of Limon, moving southeast at 30 mph. HAZARD...Ping pong ball size hail. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect damage to roofs, siding, windows, and vehicles. Locations impacted include... Hugo.
October 28, 2025 at 12:15 AM
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🚨 Severe Thunderstorm Warning issued October 27 at 5:57PM MDT until October 27 at 6:30PM MDT by NWS Denver CO 🚨
Additional Details Here.
SVRBOU The National Weather Service in Denver has issued a * Severe Thunderstorm Warning for... East Central Lincoln County in east central Colorado... * Until 630 PM MDT. * At 557 PM MDT, a severe thunderstorm was located 10 miles south of Hugo, or 21 miles southeast of Limon, moving southeast at 25 mph. HAZARD...Ping pong ball size hail. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect damage to roofs, siding, windows, and vehicles. * Locations impacted include... Hugo.
October 28, 2025 at 12:00 AM
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🚨 Severe Thunderstorm Warning issued October 27 at 5:41PM MDT until October 27 at 6:00PM MDT by NWS Denver CO 🚨
Additional Details Here.
At 541 PM MDT, a severe thunderstorm was located 10 miles south of Limon, moving east at 25 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Limon and Hugo.
October 27, 2025 at 11:45 PM
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Special Weather Statement issued October 27 at 5:43PM MDT by NWS Denver CO
Additional Details Here.
At 543 PM MDT, Doppler radar was tracking a strong thunderstorm over Elizabeth, or 32 miles southeast of Denver, moving east at 25 mph. HAZARD...Wind gusts up to 50 mph and half inch 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... Elbert, Elizabeth, Kiowa, Ponderosa Park and Fondis.
October 27, 2025 at 11:45 PM
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Special Weather Statement issued October 27 at 5:19PM MDT by NWS Denver CO
Additional Details Here.
At 519 PM MDT, Doppler radar was tracking a strong thunderstorm near Matheson, or 13 miles west of Limon, moving east at 25 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... Limon and Matheson.
October 27, 2025 at 11:30 PM
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Special Weather Statement issued October 27 at 5:25PM MDT by NWS Denver CO
Additional Details Here.
At 525 PM MDT, Doppler radar was tracking a strong thunderstorm near The Pinery, or 22 miles southeast of Denver, moving east at 25 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... Castle Rock, Parker, Elizabeth, Franktown, The Pinery, Ponderosa Park, Castle Pines and Castlewood Canyon.
October 27, 2025 at 11:30 PM
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Freeze Warning issued October 27 at 12:27PM MDT until October 28 at 10:00AM MDT by NWS Denver CO
Additional Details Here.
* WHAT...Low temperature Tuesday morning will be between 24 and 32 degrees. On Wednesday morning, lows will be between 18 and 26 degrees. * WHERE...Fort Collins, Boulder and the western suburbs of Denver, Denver, and Castle Rock. * WHEN...For the first Freeze Warning, from 2 AM to 10 AM MDT Tuesday. For the second Freeze Warning, from 10 PM Tuesday to 10 AM MDT Wednesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * WHAT...Low temperature Tuesday morning will be between 24 and 32 degrees. On Wednesday morning, lows will be between 18 and 26 degrees. * WHERE...Fort Collins, Boulder and the western suburbs of Denver, Denver, and Castle Rock. * WHEN...For the first Freeze Warning, from 2 AM to 10 AM MDT Tuesday. For the second Freeze Warning, from 10 PM Tuesday to 10 AM MDT Wednesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
October 27, 2025 at 6:30 PM
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Dense Fog Advisory issued October 27 at 6:28AM MDT until October 27 at 9:00AM MDT by NWS Denver CO
Additional Details Here.
* WHAT...Visibility as low as 200 yards in dense fog. * WHERE...Fort Collins, Briggsdale, Greeley, Fort Morgan, Limon, and Akron. The fog is mainly north of US 34 and Interstate 76 and in the Limon area. * WHEN...Until 9 AM MDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.
October 27, 2025 at 12:30 PM
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Freeze Warning issued October 20 at 9:54PM MDT until October 21 at 8:00AM MDT by NWS Denver CO
Additional Details Here.
* WHAT...Freezing or near freezing low temperatures between 29 and 34 degrees. The coldest readings will occur from Fort Collins through Longmont, and also east and south of Denver metro. * WHERE...Fort Collins, Boulder, Denver metro area, Castle Rock, and Byers. * WHEN...Until 8 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. Damage may also occur to unprotected outdoor plumbing.
October 21, 2025 at 4:00 AM
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Freeze Warning issued October 20 at 10:52AM MDT until October 21 at 8:00AM MDT by NWS Denver CO
Additional Details Here.
* WHAT...Sub-freezing temperatures as low as 26 expected. * WHERE...Fort Collins. * WHEN...From midnight tonight to 8 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * WHAT...Freezing or near freezing low temperatures between 29 and 34 degrees. The coldest readings will occur from Fort Collins through Longmont, and also east and south of Denver metro. * WHERE...Fort Collins, Boulder, Denver metro area, Castle Rock, and Byers. * WHEN...From midnight tonight to 8 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. Damage may also occur to unprotected outdoor plumbing.
October 20, 2025 at 5:00 PM
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🚨 High Wind Warning issued October 20 at 5:56AM MDT until October 20 at 11:00AM MDT by NWS Denver CO 🚨
Additional Details Here.(2/2)
* WHAT...Northwest winds 25 to 40 mph with gusts up to 60 mph. * WHERE...Briggsdale. * WHEN...Until 11 AM MDT this morning. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Blowing dust will reduce visibility to less than a quarter mile in places.
October 20, 2025 at 12:00 PM
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🚨 High Wind Warning issued October 20 at 5:56AM MDT until October 20 at 11:00AM MDT by NWS Denver CO 🚨
Additional Details Here.
(1/2)
* WHAT...Northwest winds 25 to 35 mph with gusts up to 60 mph. * WHERE...Greeley, Fort Morgan, and Akron. * WHEN...Until 11 AM MDT this morning. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Strong winds will likely lead to rapid fire growth of any new fire. Areas of blowing dust will also occur, reducing visibility in spots. * WHAT...For the High Wind Warning, northwest winds 25 to 40 mph with gusts up to 65 mph. For the Freeze Warning, freezing or near freezing low temperatures between 29 and 32 degrees. * WHERE...Fort Collins. * WHEN...For the High Wind Warning, until 11 AM MDT this morning. For the Freeze Warning, from midnight tonight to 8 AM MDT Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Blowing dust will reduce visibility to less than a mile in places. Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * WHAT...For the High Wind Warning, northwest winds 25 to 40 mph with gusts up to 65 mph. For the Freeze Warning, freezing or near freezing low temperatures between 29 and 32 degrees. * WHERE...Fort Collins. * WHEN...For the High Wind Warning, until 11 AM MDT this morning. For the Freeze Warning, from midnight tonight to 8 AM MDT Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Blowing dust will reduce visibility to less than a mile in places. Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * WHAT...Freezing or near freezing low temperatures between 29 and 34 degrees. The coldest readings will occur from Fort Collins through Longmont, and also east and south of Denver metro. * WHERE...Boulder and the western suburbs of Denver, Denver, Castle Rock, and Byers. * WHEN...From midnight tonight to 8 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. Damage may also occur to unprotected outdoor plumbing.
October 20, 2025 at 12:00 PM
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🚨 High Wind Warning issued October 20 at 5:37AM MDT until October 20 at 11:00AM MDT by NWS Denver CO 🚨
Additional Details Here.(1/2)
* WHAT...For the High Wind Warning, northwest winds 25 to 40 mph with gusts up to 65 mph. For the Freeze Warning, freezing or near freezing low temperatures between 29 and 32 degrees. * WHERE...Fort Collins. * WHEN...For the High Wind Warning, until 11 AM MDT this morning. For the Freeze Warning, from midnight tonight to 8 AM MDT Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Blowing dust will reduce visibility to less than a quarter mile in places. Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * WHAT...For the High Wind Warning, northwest winds 25 to 40 mph with gusts up to 65 mph. For the Freeze Warning, freezing or near freezing low temperatures between 29 and 32 degrees. * WHERE...Fort Collins. * WHEN...For the High Wind Warning, until 11 AM MDT this morning. For the Freeze Warning, from midnight tonight to 8 AM MDT Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Blowing dust will reduce visibility to less than a quarter mile in places. Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * WHAT...Northwest winds 25 to 40 mph with gusts up to 60 mph. * WHERE...Briggsdale. * WHEN...Until 11 AM MDT this morning. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result. Blowing dust will reduce visibility to less than a quarter mile in places. * WHAT...Freezing or near freezing low temperatures between 29 and 34 degrees. The coldest readings will occur from Fort Collins through Longmont, and also east and south of Denver metro. * WHERE...Fort Collins, Boulder, Denver metro area, Castle Rock, and Byers. * WHEN...From midnight tonight to 8 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. Damage may also occur to unprotected outdoor plumbing.
October 20, 2025 at 11:45 AM