1 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Denver/Boulder, CO wrote its last area forecast discussion before the first event at Jul 19, 1:50 PM MST, 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 250 PM MDT MON JUL 19 2004 .SHORT TERM DISCUSSION...ABUNDANT MOISTURE STILL PREVALENT ACROSS AREA...AS NOTED BY WATER VAPOR LOOPS. CURRENT PRECIPITABLE WATER VALUES OVER AN INCH. LATEST RADAR SHOWING CONVECTION CONFINED TO HIGHER TERRAIN AS WEAK CAP PERSISTS ACROSS PLAINS. WATER VAPOR LOOP INDICATING WEAK SHORTAVE MOVING ACROSS WYOMING...NOT APPARENT ON MODELS. WAVE SHOULD CONTINUE TO HEAD EAST...SHOULD AID IN BREAKING CAP ACROSS PLAINS THIS EVENING. WILL KEEP CURRENT POPS. STORMS COULD DUMP SOME HEAVY RAIN...ESPECIALLY ALONG THE FOOTHILLS WHERE RAINS FROM PREVIOUS DAYS HAD CREATED LOCAL PROBLEMS. DESPITE WEAK WINDS ALOFT...RADAR SHOWING SOME MOVEMENT TO THE STORMS...PROBABLY ASSOCIATED WITH MOVEMENT OF WAVE. THUS...NOT ANTICIPATING WIDESPREAD FLOODING PROBLEMS AT THIS TIME. ACTIVITY SHOULD DIE OFF BY MIDNIGHT ONCE WAVE MOVES EAST OF AREA AND SUBSIDENCE BECOMES APPARENT. ON TUESDAY...LITTLE CHANGE EXPECTED IN OVERALL PATTERN. UPPER LEVEL HIGH EXPECTED TO REMAIN NEAR FOUR CORNERS WITH PRECIPITABLE WATER VALUES AROUND AN INCH. SHOULD AGAIN SEE CONVECTION FIRE ACROSS MOUNTAINS AND FOOTHILLS BY LATE MORNING AS ATMOSPHERE DESTABILIZES. MODELS INDICATE SOME SORT OF WEAK SHORTWAVE...VIA DIV-Q FIELDS... ROTATING THROUGH AREA BY AFTERNOON. FOR THIS REASON...WILL UP THE POPS A CATEGORY ACROSS THE HIGH COUNTRY. AS FOR PLAINS...7H TEMPERATURES EXPECTED TO BE AROUND +16 DEGREES CELSIUS...WHICH COULD DELAY STORM DEVELOPMENT. FORECAST SOUNDINGS DO SHOW A WEAK CAP AROUND 650 MB LINGERING THROUGH MUCH OF THE DAY. MODELS ALSO INDICATE SURFACE FRONT MOVING SOUTH ACROSS AREA BY 18Z...WITH LOW LEVEL EASTERLY FLOW DURING AFTERNOON. THIS MAY ALSO DELAY THE STORMS. WILL DELAY STORMS ACROSS PLAINS A FEW HOURS...BUT WILL KEEP POPS AS IS. GRIDDED TEMPERATURE AND THICKNESS GRIDS SHOW A COUPLE DEGREES OF WARMING FROM TODAYS READINGS DESPITE UPSLOPE. GUIDANCE VALUES INDICATE LITTLE CHANGE...WHICH IS MORE PREFERRED. .LONG TERM DISCUSSION...TUESDAY NIGHT...THE UPPER LEVEL RIDGE WILL REMAIN CENTERED OVER AZ/NEW MX. CAPES LATE TUESDAY AFTN WILL RANGE FROM 500 TO 1000 J/KG...ENOUGH TO MAINTAIN A SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. WEDNESDAY THROUGH SATURDAY...UPPER RIDGE BECOMES MORE SUPPRESSED AND A WESTERLY FLOW ALOFT DEVELOPS AS A SERIES OF DISTURBANCE MOVES ACROSS THE NORTHERN ROCKIES. THE FIRST SYSTEM WILL PASS TO THE NORTH OF COLORADO ON WEDNESDAY WITH ANOTHER ON THURSDAY. AS A RESULT...A WEAK COOL FRONT SLIDES INTO NORTHEASTERN COLORADO WEDNESDAY AFTERNOON WITH A STRONGER ONCE PUSHING INTO THE CWFA ON THURSDAY AFTERNOON. THE MESOETA BUFFER SOUNDINGS SHOW THE BEST CAPE BY THURSDAY AND FRIDAY WILL BE ALONG THE FRONT RANGE FOOTHILLS AND PALMER DIVIDE AS TERRAIN WILL BE THE FOCUSING MECHANISM FOR ANY THUNDERSTORMS WITH UPSLOPE CONDITIONS IN PLACE. IF THE ETA/AVN SOUDNINGS ARE CORRECT THAN THE PRECIPITABLE WATER VALUES BOTH DAYS WILL BE WELL OVER AN INCH...SO HEAVY RAIN WILL BE THE MAIN THREAT FROM THE THUNDERSTORMS. THE NORTHEAST PLAINS MAY BE TOO CAPPED FOR THUNDERSTORMS ON THURSDAY AND FRIDAY...BUT STILL THINK SCT SHOWERS WILL BE AROUND. AS A RESULT HAVE REWORDED THE WEATHER FOR THAT TIME WITH JUST ISOLATED STORMS POSSIBLE. AS FOR THE WEEKEND...THE GFS DOES NOT SHOW MUCH OF A RECOVERY IN TEMPERATURES UNTIL POSSIBLY MONDAY. FOR NOW WILL HOLD OFF ON CHANGING THINGS TOO DRASTICALLY AND KEEP THINGS MORE IN LINE WITH THE SURROUNDING OFFICES. && .BOU WATCHES/WARNINGS/ADVISORIES...NONE. && D-L/COOPER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1102 AM MDT MON JUL 19 2004 COZ030>051-201200- JACKSON COUNTY BELOW 9000 FEET-WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/GILPIN/CLEAR CREEK/ SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY-LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY-NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/ EAST BROOMFIELD COUNTY-ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY-SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 1102 AM MDT MON JUL 19 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP IN THE MOUNTAINS AND FOOTHILLS...PERSISTING INTO THE EARLY EVENING HOURS. ON THE PLAINS...ONLY ISOLATED STORMS CAN BE EXPECTED. DUE TO WEAK INSTABILITY AND WIND SHEAR...SEVERE STORMS ARE NOT ANTICIPATED. HOWEVER...A FEW STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAIN. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY SHOWERS AND THUNDERSTORMS WILL BECOME MORE NUMEROUS WEDNESDAY THROUGH FRIDAY...AS A SERIES OF COLD FRONTS MOVE INTO THE NORTHEAST PLAINS. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS WEDNESDAY ...BUT BY THURSDAY AND FRIDAY COOLER TEMPERATURES WILL LIMIT INSTABILITY AND THE THREAT OF SEVERE WEATHER. HOWEVER...LOCALLY HEAVY RAINFALL MAY DEVELOP AS MOISTURE INCREASES SIGNIFICANTLY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. D-L/COOPER
The Denver radar (KFTG), 95 km away, was scanning. The volume nearest the first event began at 21:33 UTC.
1 flash flood. Local standard time, as filed.
Heavy rain again caused flash flooding over Virginia Canyon Road. The road again had to be closed for repairs.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2004Every state in 2004This day in weather historyWarnings in Colorado, July 2004
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5417174.