WFO Denver/Boulder


FLOODING CAN BE A MAJOR PROBLEM IN COLORADO AS WE SAW RECENTLY IN SEPTEMBER 2013.  
HEAVY RAIN FELL OVER A LARGE AREA OF THE FOOTHILLS RESULTING IN FLASH FLOODING IN THE 
FOOTHILLS.  ALL THE WATER THAT FELL ENDED UP IN THE SOUTH PLATTE RIVER, WITH MAJOR RIVER 
FLOODING OCCURRING FROM GREELEY TO THE STATE LINE.  

RIVER FLOODING CAN RESULT FROM HEAVY RAIN DURING THE SUMMER AND FROM RAPID SNOW MELT 
OR THUNDERSTORM RAINS COMBINING WITH RUNOFF FROM MELTING SNOW.  

FLASH FLOODING…REFERS TO A DANGEROUS SUDDEN RISE IN WATER IN A CANYON OR ALONG A CREEK 
OR WASH, OR OVER A NORMALLY DRY LAND AREA.  FLASH FLOODS RESULT FROM HEAVY 
RAINFALL, SUDDEN BREAKS IN RIVER ICE JAMS, AND DAM OR LEVEE FAILURES.  FLASH 
FLOODS CAN OCCUR WITHIN A FEW MINUTES OR HOURS, AND CAN MOVE AT SURPRISINGLY 
HIGH SPEEDS, STRIKING WITH LITTLE WARNING.  FLASH FLOODS ARE QUITE DESTRUCTIVE 
BECAUSE OF THE FORCE OF THE MOVING WATER, AND THE DEBRIS THAT ACCUMULATES IN 
FLOOD WATERS, SUCH AS TREES AND BOULDERS, WHICH CAN DESTROY ROADWAYS, BRIDGES 
AND BUILDINGS. 

ANOTHER COMPLICATION IN COLORADO IS THE SERIOUS FLOODING THAT CAN RESULT WHEN HEAVY 
RAIN FALLS ON RECENTLY BURNED AREAS. RESIDENTS IN AND NEAR RECENTLY BURNED AREAS NEAR 
MANCOS, NEAR DE BEQUE, AND IN THE FRONT RANGE FOOTHILLS SHOULD PLAN AHEAD ON RESPONSE 
ACTIONS FOR FLOODING.  

THE NATIONAL WEATHER SERVICE WILL DISCUSS FLOOD AND FLASH FLOOD POTENTIAL IN 
DAILY HAZARDOUS WEATHER OUTLOOKS AND IN THE WEATHER STORY ON NATIONAL WEATHER
SERVICE WEBSITES. ON DAYS WITH A HIGH THREAT FOR FLOODING YOU MAY HEAR... 

A FLASH FLOOD OR FLOOD WATCH...WHICH MEANS THAT FLASH FLOODING OR
FLOODING IS POSSIBLE WITHIN THE WATCH AREA.  

A FLOOD WARNING, WHICH MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED
ALONG A RIVER. 

A FLASH FLOOD WARNING, WHICH MEANS THAT FLASH FLOODING HAS BEEN
REPORTED OR IS IMMINENT. WHEN A FLASH FLOOD WARNING IS ISSUED FOR
YOUR AREA...ACT QUICKLY. IF ADVISED TO EVACUATE, DO SO IMMEDIATELY. 
GO TO HIGHER GROUND OR CLIMB TO SAFETY BEFORE ACCESS IS CUT OFF BY
FLOOD WATERS.

NEARLY HALF OF ALL FLASH FLOOD FATALITIES ARE VEHICLE RELATED.  DO NOT ENTER A 
FLOODED ROADWAY...INSTEAD TURN AROUND...DO NOT DROWN.  IN RAPIDLY RISING 
WATERS, BACKING UP AWAY FROM WATER MAY BE SAFER. ONE TO TWO FEET OF 
WATER WILL CARRY AWAY MOST VEHICLES AND YOU ALSO CANNOT TELL IF THE ROAD IS 
DAMAGED BENEATH THE WATER.    

COLORADO FLOOD SAFETY AND WILDFIRE AWARENESS WEEK CONTINUES THROUGH THIS SATURDAY.  



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.