Heavy rain producing thunderstorms caused flooding and mudslides in west central and southwest Colorado.
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 episode as NWS GJT wrote it up.
Heavy rain producing thunderstorms caused flooding and mudslides in west central and southwest Colorado.
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 Grand Junction, CO wrote its last area forecast discussion before the first event at Aug 5, 1:37 PM MST, 1 hour 23 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 237 PM MDT SUN AUG 5 2007 .SHORT TERM...TONIGHT THROUGH TUESDAY... ONLY SUBTLE CHANGES EXPECTED IN THE WEATHER PATTERN THE NEXT COUPLE OF DAYS. MONSOONAL MOISTURE WILL CONTINUE TO ADVECT ACROSS THE AREA WITH THE GREATEST MOISTURE ACROSS THE SOUTH. THE GJT 12Z SOUNDING WAS A VERY MOIST 1.25 INCHES OF PRECIPITABLE WATER. A WEAK MID LEVEL SHORTWAVE OVER SOUTHWEST COLORADO AND SOME DIVERGENCE ALOFT AHEAD OF A SHORTWAVE TROUGH OVER THE GREAT BASIN ARE AIDING IN STORM DEVELOPMENT THIS AFTERNOON. STRONGEST STORMS SO FAR HAVE BEEN OVER NORTHEAST UTAH AND NORTHWEST COLORADO WHERE WEAK DYNAMICS AND BEST SURFACE HEATING EARLY ARE AT WORK. HEAVY RAINFALL STILL THE MAIN THREAT WITH STORMS WITH LOCALIZED FLASH FLOODING A POSSIBILITY. STORMS WILL CONTINUE TO DEVELOP LATE THIS AFTERNOON AND EARLY EVENING. CONVECTION ACROSS SOUTHWEST COLORADO MAY BE SUPPRESSED ON THE BACK SIDE OF THE AFOREMENTIONED SHORTWAVE MOVING ACROSS THE AREA. SHOWERS AND STORMS WILL DECREASE WITH SUNSET BUT CAN NOT RULE OUT ISOLATED TO SCATTERED NOCTURNAL SHOWERS AND THUNDERSTORMS OVERNIGHT WITH MODELS INDICATING A WEAK SHORTWAVE AND DIVERGENCE ALOFT TRAVERSING THE AREA. MORE OF THE SAME FOR MONDAY AND TUESDAY. THE UPPER JET AXIS REMAINS ACROSS THE GREAT BASIN AND NORTHERN ROCKIES POTENTIALLY PROVIDING WEAK DYNAMIC FORCING ALONG ITS SOUTH EDGE. HINTS OF A WEAK BAROCLINIC BOUNDARY BRUSHING THE NORTH AS WELL WHILE SUBTLE SHORTWAVES TROUGHS WILL LIKELY ROTATE OVER THE AREA FROM THE SOUTH...ALL CONTRIBUTING TO MAINLY DIURNAL SHOWERS AND THUNDERSTORMS. MADE LITTLE CHANGE TO THE GOING TEMPERATURE FORECAST WHICH GENERALLY FOLLOWED GUIDANCE AND IS AROUND SEASONAL NORMALS. LINDQUIST .LONG TERM...TUESDAY NIGHT THROUGH SUNDAY... OVERALL PATTERN REMAINS IN PLACE WITH HIGH CENTERED OVER THE SOUTHEAST U.S. AND LOW MOVING INTO THE NORTHWEST BUT STALLING BEFORE MAKING MUCH PROGRESS. SLIGHT WARMING AND DRYING TREND BY THE END OF THE WEEK IS HANDLE WELL SO ONLY MINOR TWEAKS TO THE CURRENT PACKAGE. DJC/21 && .AVIATION... MONSOON INFLUENCE TO CONTINUE TO BRING CONVECTIVE WEATHER HAZARDS TO THE AVIATION COMMUNITY. VFR CONDITIONS WILL DOMINATE BUT SOME AREAS WILL HAVE BRIEF PERIODS OF MVFR CEILINGS AND VISIBILITY FROM HEAVY SHOWERS. SHOWERS AND LOW CEILINGS WILL OBSCURE MOUNTAINOUS TERRAIN. && .GJT WATCHES/WARNINGS/ADVISORIES... .CO...NONE. .UT...NONE. SHORT TERM...TAL LONG TERM...DJC AVIATION...TAL
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 600 AM MDT SUN AUG 5 2007 COZ001>014-017>023-UTZ022>025-027>029-061200- ANIMAS RIVER BASIN-ARCHES/GRAND FLAT-CANYONLANDS/NATURAL BRIDGES- CENTRAL COLORADO RIVER BASIN- CENTRAL GUNNISON AND UNCOMPAHGRE RIVER BASIN- CENTRAL YAMPA RIVER BASIN-DEBEQUE TO SILT CORRIDOR- EASTERN UINTA BASIN-EASTERN UINTA MOUNTAINS- ELKHEAD AND PARK MOUNTAINS-FLAT TOPS- FOUR CORNERS/UPPER DOLORES RIVER- GORE AND ELK MOUNTAINS/CENTRAL MOUNTAINS-GRAND AND BATTLEMENT MESAS- GRAND VALLEY-LA SAL AND ABAJO MOUNTAINS-LOWER YAMPA RIVER BASIN- NORTHWEST SAN JUAN MOUNTAINS-PARADOX VALLEY/LOWER DOLORES RIVER- ROAN AND TAVAPUTS PLATEAUS-SAN JUAN RIVER BASIN-SOUTHEAST UTAH- SOUTHWEST SAN JUAN MOUNTAINS-TAVAPUTS PLATEAU- UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE-UPPER GUNNISON RIVER VALLEY- UPPER YAMPA RIVER BASIN-WEST ELK AND SAWATCH MOUNTAINS- 600 AM MDT SUN AUG 5 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT EXPECT SCATTERED SHOWERS AND THUNDERSTORMS...MORE NUMEROUS OVER THE WESTERN COLORADO MOUNTAINS...TODAY AND THIS EVENING. A FEW OF THESE STORMS WILL CONTINUE PAST MIDNIGHT. A FEW STORMS WILL PRODUCE HEAVY RAIN THAT WILL CAUSE ARROYOS AND SMALL STREAMS TO QUICKLY FILL OR RUN HIGH WITH FAST FLOWING WATER. THE STRONGER STORMS WILL PRODUCE FREQUENT CLOUD TO GROUND LIGHTNING AND SMALL HAIL. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP EACH AFTERNOON AND EVENING THROUGH TUESDAY. SOME STORMS WILL BE SLOW MOVERS AND PRODUCE BRIEF HEAVY RAIN AND SMALL HAIL. URBAN OR SMALL STREAM FLOODING WILL BE POSSIBLE. WEDNESDAY THROUGH SATURDAY...CONDITIONS WILL BECOME SLIGHTLY DRIER EACH DAY...WITH THUNDERSTORM DEVELOPMENT DECREASING FROM NORTHWEST TO SOUTHEAST ACROSS THE AREA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED THIS AFTERNOON OR TONIGHT. HOWEVER...REPORTS RELAYED TO THE NATIONAL WEATHER SERVICE OF HEAVY RAIN...HAIL...AND ANY WEATHER RELATED DAMAGE WOULD BE GREATLY APPRECIATED.
The Grand Junction radar (KGJX), 103 km away, was scanning. The volume nearest the first event began at 05:09 UTC.
1 debris flow, 1 heavy rain, 1 flash flood. Local standard time, as filed.
Heavy rain caused a mudslide along Highway 550 near Red Mountain Pass which temporarily closed the road.
Rainfall of 1.5 inches fell in 1 hour at a residence located two miles south of Lemon Dam.
Torrential rainfall over the Seven Castles formation of cliffs and gullies funneled down the Seven Castles Creek drainage and spilled into the Fryingpan River. The flood of water, rocks, and mud caused the course of the river channel to shift south. The debris field from the flood was about 1/4 mile wide and caused Eagle County road crews to scurry to the scene to clear up the debris covering the road. Debris ranged from knee-deep to waist-high. A temporary construction bridge and a section of Old Stage Road were washed out.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2007Every state in 2007This day in weather historyWarnings in Colorado, August 2007
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: 56660, 56735, 56657.