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


About:
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:  Thursday, July 31, 2014
Time Issued:  10:44 AM MDT
Forecaster:  Brad Workman

MONSOONAL MOISTURE AND FLOOD THREAT LINGERING

A MODERATE FLOOD THREAT IS FORECAST FOR PORTIONS OF CENTRAL AND SOUTHERN COLORADO; A LOW FLOOD THREAT IS FORECAST FOR MUCH OF THE HIGHER TERRAIN, FOOTHILLS, AND ADJACENT PLAINS. 

Shower and thunderstorm activity will take another shot at the state today, mainly over and near the higher terrain, as monsoonal moisture lingers over the region. The water vapor image below really tells the story, as moisture continues to rotate into Colorado around the stubborn high pressure center to the south. IPW values continue to run at, or above, an inch along the Front Range and over the higher terrain. Further east, the values have slacked off a bit, but still within the realm of ability to produce heavy rain.

Showers and thunderstorms will be scattered today and mainly over and near the higher terrain, including the Palmer Divide. The activity over the Plains will be limited due to persistent cloud cover - it will limit atmosphere destabilization, and in turn, limit the ability to develop thunderstorms over that region. The best chance for thunderstorms over the Plains will be near the higher terrain where storms move off the mountains and overhead, and along and south of the Palmer Divide.

Water vapor imagery valid 8:45AM Mountain. Source: UCAR

REGION-SPECIFIC FORECASTS

High Country and Western Slope:

Scattered showers and thunderstorms will redevelop between 11 AM and Noon, and last into the evening hours, with a few storms lingering until midnight. The most widespread activity will happen along and south of I-70 where moisture is best and cloud cover has diminished the most. Heavy rain will attend the stronger storms, with max rainfall rates as high as 1.5-2 inches/hour. High temperatures will be a bit warmer today, but still below average for this time of year. 

Palmer Divide and Eastern Plains:

Isolated-to-scattered showers and thunderstorms will occur across the Palmer Divide and I-25 corridor between 11 AM and 10 PM, mainly along and south of I-70. For the far northeastern Plains, drier air is working in from the northwest and will effectively shut off the ability to produce thunderstorms in that area. Locations north of I-70 and near the foothills will hold a chance to catch a thunderstorm moving overhead off of the higher terrain. For the southeastern plains, an isolated thunderstorm or two cannot be ruled out, though the chances are slim (less than 30%). High temperatures will continue to be below average, with highs in the 70s and low 80s.

One flood advisory is currently in effect for the South Platte River near Kersey (Weld County). Be sure to stay of flooded areas and away from river banks that could be unstable due to higher flowers.


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



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Disclaimer:

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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