ALERT Flood Detection

Fri, Sep 25, 2026: A late season #COflood threat for the @MHFloodDistrict as moisture remains quite elevated over the area. Potential flood hazards include rises on waterways, road flooding, & isolated debris slides over steep terrain. Follow @NWSBoulder for the latest. #cowx

Sat, Aug 15, 2026: Moisture remains elevated, so more heavy rainfall is forecast for the @MHFloodDistrict. Potential #COflood threat hazards include rises on waterways, road flooding, & isolated debris slides over steep terrain. Follow @NWSBoulder for warnings & advisories. #cowx

Fri, Aug 14, 2026: Another round of afternoon & evening heavy rainfall forecast over the @MHFloodDistrict, with areas east under a higher threat. Flood hazards today: rises on waterways, road flooding & debris slides over steep terrain. Follow @NWSBoulder for the latest. #cowx

Thu, Aug 13, 2026: A couple rounds of heavy rainfall are forecast for the @MHFloodDistrict today. Flood threats include rises on waterways, road flooding & isolated debris flows over steep terrain. Follow @NWSBoulder for the latest. #cowx

Wed, July 29, 2026: Heavy rain is once again expected this afternoon for Denver metro, with south/east areas under higher threat. Threats: flash flooding, road flooding & debris slides over steeper terrain. Follow @NWSBoulder for warnings & advisories. #cowx @MHFloodDistrict

Tue, July 28, 2026: A round or two of heavy rain is expected later today for Denver metro. Threats include flash flooding, road flooding & debris slides over steeper terrain. Follow @NWSBoulder for the latest warnings & advisories. #cowx @MHFloodDistrict

Thu, July 23, 2026: Heavy rain is forecast today over the Denver metro & surrounding area. Threats include flash flooding, road flooding & debris slides over steep terrain. Follow @NWSBoulder for the latest warnings & advisories. #cowx @MHFloodDistrict

Heavy rainfall moved through the Denver Metro this afternoon (Mon, Jun 1st). This @mhfdfws ALERT gauge in Aurora picked up 2.05 inches/30-minutes & 2.44 inches/1-hour. Both intensities are a 1% Annual Exceedance Probablity. #cowx #COflood #mhfdrain

Tue, Aug 26, 2025: Heavy rain is forecast today over the @MHFloodDistrict with abundant moisture helping to produce efficient rainfall rates. #COflood threats include rises on waterways, road flooding & debris flows over steep terrain. Follow @NWSBoulder for the latest. #cowx

Wed, Jul 30, 2025: More heavy rain is expected over the @MHFloodDistrict this afternoon & evening. Rises on local waterways, road/low-lying area flooding, & debris flows over steep terrain will be possible. Follow @NWSBoulder for the latest warnings & advisories. #cowx #COflood

Tue, Jul 29, 2025: Despite AM cloud cover, plenty of moisture is expected to fuel scattered to widespread PM storms over mainly southern portions of the @MHFloodDistrict. Follow @NWSBoulder for the latest warnings & advisories. #cowx #coflood

Thu, Jul 24, 2025: Another High threat of heavy is expected this afternoon/evening for the @MHFloodDistrict. Highest threat will be southern/eastern areas. Flash flooding & debris flows will be possible. Follow @NWSBoulder for the latest warnings & advisories. #cowx #COflood

More heavy rainfall for the @MHFloodDistrict this evening (Wed, Jul 23rd). An ALERT gauge in Aurora picked up 1.62in/1-hour (4-10% annual chance). More impressive is the 15-minute rainfall rate of 1.15in (3% annual chance). #cowx #COflood

Heavy rain affected several parts of the @MHFloodDistrict yesterday (Tue, 7/22). The highest intensities were along I-25 from Lone Tree to Castle Rock. This ALERT gauge picked up 1.62in/2-hours (a 4-10% annual chance). Up to 2.5in/2-hr occurred nearby (1-2% annual chance). #cowx

Wed, Jul 23, 2025: Persistent upslope flow in a high moisture environment will return the threat for heavy #MHFDrain to the western @MHFloodDistrict. Flash flooding & debris flows will be possible. Please follow @NWSBoulder for the latest warnings & advisories. #cowx #COflood

Tue, Jul 22, 2025: Brief, but heavy #MHFDrain is expected over portions of the @MHFloodDistrict by early afternoon. Isolated flash flooding will be possible. Please follow @NWSBoulder for the latest warnings & advisories that are issued. #cowx #COflood

A second day in a row for heavy rainfall over the @MHFloodDistrict. This @mhfdfws ALERT gauge near Buckley picked up 1 inch of rain in 10 minutes! That's a 2% Annual Exceedance Probability. #cowx #coflood #mhfdrain

Heavy rainfall moved through the south Denver metro area earlier this afternoon. This @mhfdfws ALERT gauge just south of Parker received 1.13 inches in 15-minutes, which is a 2-4% Annual Exceedance Probability. Check out other max intensities from the storm below. #cowx #mhfdrain