FLOOD THREAT BULLETIN (For Twitter Updates follow @FloodDSS and @COFloodUpdates)

The CWCB offers a daily assessment of flood potential around the state, issued at 11:00 am each day from May through September.

This product is issued daily before 11:00 am and is used to identify areas of the state that are at risk of flooding.  Updates can be issued as needed by weather situation.

This product is an outlook of the flood threat and precipitation amount and chance in the state over the next 15 days.

This map is created by merging the 24-hr Storm Total Precipitation (STP) product observed regional WSR-88D and the MADIS observational database. Issued at 9:30 am every day.

Issue Date:  Tuesday, Sept. 16, 2014
Time Issued:  10:26 AM MDT
Forecaster:  Brad Workman   



The general atmospheric pattern across the United States is categorized by a broad, high pressure ridge over the west and a broad, low-pressure trough over the east. This has placed Colorado underneath dry, WNW flow aloft, allowing for the state to warm up nicely this afternoon. You can see all of this depicted in the water vapor image below; green lines show the trough/ridge pattern, wind flags show the WNW flow aloft, and the yellow line separates the drier air underneath the high pressure ridge from the moist air accompanying the approach of former Hurricane Odile.

There will be enough moisture over the southern half of the state to produce isolated-to-widely scattered showers and thunderstorms over the higher terrain south of I-70 this afternoon and evening. The best opportunity for thunderstorm development will be over the San Juan Mountains and far southern extents of the Sangre de Cristo Mountains. One or two isolated storms will drift over southern valleys, though this activity is expected to be minimal. Expect all showers and thunderstorms to end around sunset as the storms will be diurnally driven by the heat of the day.

Otherwise, for the rest of the state, expect sunny skies and dry conditions, with temperatures warming above seasonal averages. Details on high temperatures can be found in the region-specific discussions below.


High Country and Western Slope, South of I-70:

Isolated-to-scattered showers and thunderstorms will form over the higher terrain this afternoon and evening (Noon – 8 PM), with all activity ending around sunset. The best, relative, opportunity for activity will be over the San Juan Mountains and southern extents of the Sangre de Cristo Mountains. Rain rates will be sufficiently low (0.15-0.25 inches/hour maximum), so no flash flooding issues are expected. Skies will be mostly sunny between showers and thunderstorms, and high temperatures will be in the 80s in the valleys, ranging into the mid-50s to low 60s for the higher peaks.

High Country and Western Slope, North of I-70:

Mostly sunny skies and dry will be the name of the game today, with high temperatures 3-7 degrees above seasonal average. Highs will be in the low-to-mid 80s for the valleys ranging to the upper 50s and low 60s for the higher elevations.

Urban Corridor and East:

Dry and mostly sunny, with temperatures warming up nicely. Highs will be in the 80s for most (upper 70s across the Palmer Divide), with a few locations across the far southeastern plains venturing near, or just above, 90 degrees.

Hover over your county to read your county-specific flood threat prediction.



The State of Colorado makes no warranties or guarantees, either expressed or implied as to the completeness, accuracy, or correctness of the data portrayed in this product nor accepts any liability, arising from any incorrect, incomplete or misleading information contained therein.  All information, data and databases are provided "as is" with no warranty, expressed or implied, including but not limited to, fitness for a particular purpose. 

By accessing this website and/or data contained within the databases, you hereby release the State of Colorado, its employees, agents, contractors, and suppliers from any and all responsibility and liability associated with its use. In no event shall the State of Colorado or its officers or employees be liable for any damages arising in any way out of the use of the website, or use of the information contained in the website herein including, but not limited to the Flood Threat Portal.  

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