The Colorado Flood Threat Bulletin 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:  Wednesday, July 30, 2014
Time Issued:  9:07 AM MDT
Forecaster: Dima Smirnov


Mother nature did not take long to deliver downpours on Tuesday, starting the in the northwest part of the state before noon and quickly spreading across the Divide into the Front Range by early afternoon and farther south and eastward into the evening and overnight hours. Most of the heavy rain squalls lasted anywhere from 40 to 60 minutes, delivering up to 2.5 inches of rain in one hour. One particular downpour moved by our office in downtown Denver during the mid afternoon and dropped 0.63 inches in about 14 minutes before subsiding. Many locations received multiple such thunderstorms, leading to widespread rain totals above 2 inches across the state (mainly east of the Divide) with some locations in the southeast exceeding 4 inches. Below is a small sampling of the many impressive 24-hour rain totals (for a more complete list, check out the Colorado CoCoRAHS reports). Of course, check out our map below for a statewide picture.

Location (County): Amount (inches)

Eads (Kiowa): 5.64

Iliff (Logan): 4.02

Lamar (Prowers): 3.92

Windsor (Weld): 3.54

Vernon (Yuma): 3.15

Springfield (Baca): 2.93

Black Forest (El Paso): 2.52

Hillrose (Morgan): 2.49

Denver (Denver): 2.10* [Also, record daily rainfall at DIA of 1.80 inches]

Holyoke (Phillips): 1.95

Boulder (Boulder): 1.73

Steamboat Springs (Routt): 1.65

Basalt (Eagle): 0.93

Rocky Ford (Otero): 0.87

Monte Vista (Rio Grande): 0.65

Fruita (Mesa): 0.48


As we all know, in Colorado, these kinds of rainfall totals usually imply a hefty flood threat. Indeed, as of 8:45AM this morning roughly three dozen flash flood, flood and debris flow reports had been noted. Quite a few of the flood reports came from Larimer and Weld counties where numerous roads were impassable due to standing or moving water. Another aggregate of reports came from Prowers County, where the 3-5 inches of rainfall resulted in quite a few road closures. At least 3 reports of debris flows, rock and mud slides were reported over the higher terrain of Eagle, Moffat and Delta counties. The Eagle County report stated that I-70 was closed at mile marker 153 due to a mud slide.

Map Update: Our forecasters will continue to monitor weather conditions over all of Colorado's burn areas throughout the summer. 
*Radar-estimated rainfall under 0.25 inches not shown

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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