ALERT GMap is smartphone friendly, however, it’s touch features may be difficult for some users to navigate. Desktop/laptop users should find GMap easy to use. This popular map can also be launched by clicking on the MHFD-FWS logo on the alert5 homepage. Zero readouts are not displayed on this map.

A “Lite” version of GMap designed for Twitter followers is another option. To check the operational status of all ALERT rain gages use the station status GMap. A green ‘+‘ is used to show functioning stations and a red ‘x‘ indicates that the station is either out-of-service or discontinued.

Our Contrail website is another great option for viewing ALERT data. The TriLynx NovaStar5 viewer is another choice. And finally, be sure to check out real-time storm/flood data from our latest ESRI ArcMap.

AHPS-like application designed for rapid threat level assessment of ALERT stage gages

The AHPS-like webmap is designed for monitoring stream and reservoir water levels.  A Google Earth™ option is also available.  The NWS AHPS webpage is another good option.  AHPS is an NWS acronym the stands for “Advanced Hydrologic Prediction Service.” 

NOTE: HydroWatch has been discontinued by DTN/WDT

The WDT HydroWatch website (shown above) was Flash™ dependent and is no longer supported by DTN. DTN recently acquired WDT. A replacement WeatherOps app subscription service is available from DTN. An ArcGIS webmap developed by MHFD integrates some of the features from HydroWatch. We welcome any feedback you have concerning these products.


MHFD’s Flood Hazard Inventory Tool (FHIT) contains useful information about building structures, roadway crossings, trails and other features prone to flooding.

arcgisonline20150325A cell phone friendly ArcGIS webmap  with peak flow estimates from the September 2013 floods.

Lena Gulch WatershedMonitor the Lena Gulch watershed in Jefferson County from a Contrail dashboard designed by OneRain that includes Gauge-Adjusted Radar Rainfall (GARR).

Dam Safety InformationDam safety classifications and current structure status for all jurisdictional dams is available from the Colorado Division of Water Resources.  MHFD has added the State’s GIS layer to our “Simple Web Map” for convenient reference.  To view this information select the Dam Safety layer using the ArcGIS layer control tool.  KDVR

(FOX31) also has a very good website regarding this.

NWS Weather & Hazards Data Viewer

See also NOAA’s Point Precipitation Frequency Atlas (NOAA 14)

The NHWC has a nice rain viewer for a number of states in the Western U.S. including Colorado, courtesy of the Ventura County Watershed Protection District in Ventura, CA.

WaterWatchusgs and WaterAlert are other useful websites for finding real-time streamflow information available from the U. S. Geological Survey.  A mobile-friendly version is also currently under development.

header_nrcsNRCS map of current snowpack conditions and other real-time data provided by the National Water and Climate Center.

MHFD's Real-Time Flood Detection & Prediction