Server Local Time: 2026-07-19 09:52:01

Total Alerts: 5

Colorado Statewide - Area CO

Northwestern San Juan Mountains

Flood Watch

Severe

2026-07-19T20:00:00-06:00

Flood Watch issued July 19 at 9:11AM MDT until July 19 at 8:00PM MDT by NWS Grand Junction CO

* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...A portion of southwest Colorado, including the following areas, Northwest San Juan Mountains and the Gold Mountain Burn Scar. * WHEN...Until 8 PM MDT this evening. * IMPACTS...Excessive runoff may result in debris flows as well as flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Heavy rainfall over the last few days has saturated soils across the San Juan Mountains. More heavy rain is expected again today increasing the risk for flash flooding across the watch area. This also includes the Gold Mountain Burn Scar. - http://www.weather.gov/safety/flood

Sent : 2026-07-19T09:11:00-06:00

Effective : 2026-07-19T09:11:00-06:00

Onset : 2026-07-19T09:11:00-06:00

Expires : 2026-07-19T20:00:00-06:00

Ends : 2026-07-19T20:00:00-06:00

Status : Actual

Category : Met

Certainty : Possible

Urgency : Future

Sender : w-nws.webmaster@noaa.gov

senderName : NWS Grand Junction CO

['https://api.weather.gov/zones/forecast/COZ018']

['008051', '008053', '008085', '008091', '008113']

['COZ018']

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Larimer County Below 6000 Feet/Northwest Weld County; Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County; North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County; Central and South Weld County

Heat Advisory

Moderate

2026-07-20T03:15:00-06:00

Heat Advisory issued July 18 at 11:16PM MDT until July 20 at 9:00PM MDT by NWS Denver CO

* WHAT...High temperatures between 98-102 expected on Sunday and Monday. Low temperatures Sunday night will be between 68-71 in the Denver metro. * WHERE...Fort Collins, Boulder, the Denver metro, and Greeley. * WHEN...From 10 AM Sunday to 9 PM MDT Monday. * IMPACTS...Hot temperatures may cause heat illnesses.

Sent : 2026-07-18T23:16:00-06:00

Effective : 2026-07-18T23:16:00-06:00

Onset : 2026-07-19T10:00:00-06:00

Expires : 2026-07-20T03:15:00-06:00

Ends : 2026-07-20T21:00:00-06:00

Status : Actual

Category : Met

Certainty : Likely

Urgency : Expected

Sender : w-nws.webmaster@noaa.gov

senderName : NWS Denver CO

['https://api.weather.gov/zones/forecast/COZ038', 'https://api.weather.gov/zones/forecast/COZ039', 'https://api.weather.gov/zones/forecast/COZ040', 'https://api.weather.gov/zones/forecast/COZ043']

['008069', '008123', '008013', '008014', '008059', '008001', '008005', '008031', '008035']

['COZ038', 'COZ039', 'COZ040', 'COZ043']

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Arapahoe, CO; Jefferson, CO; Boulder, CO; Denver, CO; Weld, CO; Douglas, CO; Broomfield, CO; Larimer, CO; Adams, CO

Air Quality Alert

Unknown

2026-07-19T16:00:00-06:00

Air Quality Alert issued July 18 at 4:10PM MDT by NWS Denver CO

The Colorado Department of Public Health and Environment has issued the following... WHAT...Ozone Action Day Alert. WHERE...Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer, and Weld Counties WHEN...400 PM Saturday July 18 to 400 PM Sunday July 19 IMPACTS...Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. Hot and sunny weather will allow ozone to reach levels that are Unhealthy for Sensitive Groups on Saturday and Sunday. The highest concentrations are most likely in western portions of the northern Colorado Front Range region. For Colorado air quality conditions, forecasts, and advisories, visit: https://www.colorado.gov/airquality/colorado_summary.aspx If possible, please help us reduce ozone pollution by limiting driving gas and diesel-powered vehicles until at least 4 p.m. Sunday, July 19, 2026. Colorado is also addressing ozone pollution through state policies. For more information about health impacts and how ozone pollution forms in Colorado, visit: https://cdphe.colorado.gov/ozone- pollution-and-your-health HEALTH INFORMATION...Increasing likelihood of respiratory symptoms in sensitive individuals, aggravation of heart or lung disease and premature mortality in people with cardiopulmonary disease and older adults. People with heart or lung disease, older adults, and children should reduce prolonged or heavy exertion.

Sent : 2026-07-18T16:11:00-06:00

Effective : 2026-07-18T16:10:00-06:00

Onset : 2026-07-18T16:10:00-06:00

Expires : 2026-07-19T16:00:00-06:00

Ends : None

Status : Actual

Category : Met

Certainty : Unknown

Urgency : Unknown

Sender : w-nws.webmaster@noaa.gov

senderName : NWS Denver CO

['https://api.weather.gov/zones/county/COC005', 'https://api.weather.gov/zones/county/COC059', 'https://api.weather.gov/zones/county/COC013', 'https://api.weather.gov/zones/county/COC031', 'https://api.weather.gov/zones/county/COC123', 'https://api.weather.gov/zones/county/COC035', 'https://api.weather.gov/zones/county/COC014', 'https://api.weather.gov/zones/county/COC069', 'https://api.weather.gov/zones/county/COC001']

['008005', '008059', '008013', '008031', '008123', '008035', '008014', '008069', '008001']

['COC005', 'COC059', 'COC013', 'COC031', 'COC123', 'COC035', 'COC014', 'COC069', 'COC001']

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Archuleta, CO; Delta, CO; Dolores, CO; Garfield, CO; Gunnison, CO; Hinsdale, CO; La Plata, CO; Mesa, CO; Moffat, CO; Montezuma, CO; Montrose, CO; Ouray, CO; Rio Blanco, CO; Routt, CO; San Juan, CO; San Miguel, CO; Grand, UT; San Juan, UT

Hydrologic Outlook

Unknown

2026-07-19T21:00:00-06:00

Hydrologic Outlook issued July 18 at 11:29AM MDT by NWS Grand Junction CO

ESFGJT Anomalous moisture has become established across portions of eastern Utah and western Colorado. Rainfall rates of 1-2 inches per hour will be possible with the stronger storms. These rates could lead to flash flooding and debris flows especially over recent burn scars. Storms over the last few days have helped prime lower levels of the atmosphere and saturate the ground where rain was observed. Several locations across southwest Colorado have reported 0.5 to 1.0 inches of rain within 30 minutes; which is more than sufficient to create issues in our steep, rocky terrain that is already susceptible to flash flooding. This environment also triggers heightened awareness over recent (or actively burning) fires, due to the burnt ground's inability of absorbing moisture under heavy rainfall. As such, we continue to emphasize the potential for flash flooding and debris flows in this regime. As a reminder: Keep an eye on our forecasts through the end of the week and stay tuned for updated hydrology alerts if visiting or if you reside below vulnerable terrain to flash flooding and/or debris flows. Storms across the west develop quickly, leaving little room for lead time in flashy terrain.

Sent : 2026-07-18T11:29:00-06:00

Effective : 2026-07-18T11:29:00-06:00

Onset : 2026-07-18T11:29:00-06:00

Expires : 2026-07-19T21:00:00-06:00

Ends : None

Status : Actual

Category : Met

Certainty : Possible

Urgency : Future

Sender : w-nws.webmaster@noaa.gov

senderName : NWS Grand Junction CO

['https://api.weather.gov/zones/county/COC007', 'https://api.weather.gov/zones/county/COC029', 'https://api.weather.gov/zones/county/COC033', 'https://api.weather.gov/zones/county/COC045', 'https://api.weather.gov/zones/county/COC051', 'https://api.weather.gov/zones/county/COC053', 'https://api.weather.gov/zones/county/COC067', 'https://api.weather.gov/zones/county/COC077', 'https://api.weather.gov/zones/county/COC081', 'https://api.weather.gov/zones/county/COC083', 'https://api.weather.gov/zones/county/COC085', 'https://api.weather.gov/zones/county/COC091', 'https://api.weather.gov/zones/county/COC103', 'https://api.weather.gov/zones/county/COC107', 'https://api.weather.gov/zones/county/COC111', 'https://api.weather.gov/zones/county/COC113', 'https://api.weather.gov/zones/county/UTC019', 'https://api.weather.gov/zones/county/UTC037']

['008007', '008029', '008033', '008045', '008051', '008053', '008067', '008077', '008081', '008083', '008085', '008091', '008103', '008107', '008111', '008113', '049019', '049037']

['COC007', 'COC029', 'COC033', 'COC045', 'COC051', 'COC053', 'COC067', 'COC077', 'COC081', 'COC083', 'COC085', 'COC091', 'COC103', 'COC107', 'COC111', 'COC113', 'UTC019', 'UTC037']

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Archuleta, CO; Delta, CO; Dolores, CO; Garfield, CO; Gunnison, CO; Hinsdale, CO; La Plata, CO; Mesa, CO; Moffat, CO; Montezuma, CO; Montrose, CO; Ouray, CO; Rio Blanco, CO; Routt, CO; San Juan, CO; San Miguel, CO; Grand, UT; San Juan, UT

Hydrologic Outlook

Unknown

2026-07-19T21:00:00-06:00

Hydrologic Outlook issued July 17 at 4:35PM MDT by NWS Grand Junction CO

ESFGJT Anomalous moisture has become established across portions of eastern Utah and western Colorado. Rainfall rates of 1-2 inches per hour will be possible with the stronger storms. These rates could lead to flash flooding and debris flows especially over recent burn scars. Storms over the last few days have helped prime lower levels of the atmosphere and saturate the ground where rain was observed. Several locations across southwest Colorado reported over 0.5 inches of rain within 30 minutes; which is more than sufficient to create issues in our steep, rocky terrain that is already susceptible to flash flooding. This environment also triggers heightened awareness over recent (or actively burning) fires, due to the burnt ground's inability of absorbing moisture under heavy rainfall. As such, we continue to emphasize the potential for flash flooding and debris flows in this regime. As a reminder: Keep an eye on our forecasts through the end of the week and stay tuned for updated hydrology alerts if visiting or if you reside below vulnerable terrain to flash flooding and/or debris flows. Storms across the west develop quickly, leaving little room for lead time in flashy terrain.

Sent : 2026-07-17T16:35:00-06:00

Effective : 2026-07-17T16:35:00-06:00

Onset : 2026-07-17T16:35:00-06:00

Expires : 2026-07-19T21:00:00-06:00

Ends : None

Status : Actual

Category : Met

Certainty : Possible

Urgency : Future

Sender : w-nws.webmaster@noaa.gov

senderName : NWS Grand Junction CO

['https://api.weather.gov/zones/county/COC007', 'https://api.weather.gov/zones/county/COC029', 'https://api.weather.gov/zones/county/COC033', 'https://api.weather.gov/zones/county/COC045', 'https://api.weather.gov/zones/county/COC051', 'https://api.weather.gov/zones/county/COC053', 'https://api.weather.gov/zones/county/COC067', 'https://api.weather.gov/zones/county/COC077', 'https://api.weather.gov/zones/county/COC081', 'https://api.weather.gov/zones/county/COC083', 'https://api.weather.gov/zones/county/COC085', 'https://api.weather.gov/zones/county/COC091', 'https://api.weather.gov/zones/county/COC103', 'https://api.weather.gov/zones/county/COC107', 'https://api.weather.gov/zones/county/COC111', 'https://api.weather.gov/zones/county/COC113', 'https://api.weather.gov/zones/county/UTC019', 'https://api.weather.gov/zones/county/UTC037']

['008007', '008029', '008033', '008045', '008051', '008053', '008067', '008077', '008081', '008083', '008085', '008091', '008103', '008107', '008111', '008113', '049019', '049037']

['COC007', 'COC029', 'COC033', 'COC045', 'COC051', 'COC053', 'COC067', 'COC077', 'COC081', 'COC083', 'COC085', 'COC091', 'COC103', 'COC107', 'COC111', 'COC113', 'UTC019', 'UTC037']

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