Heavy rain producing thunderstorms caused flash flooding along Highway 65.
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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 flash flooding along Highway 65.
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 Jul 20, 12:42 PM MST, 3 hours 53 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 142 PM MDT FRI JUL 20 2007 .SHORT TERM (TONIGHT THROUGH SUNDAY)... BROAD UPPER LEVEL RIDGE CONTINUES TO DOMINATE THE WEATHER ACROSS EASTERN UTAH AND WESTERN COLORADO. THIS RIDGE MOVES LITTLE THROUGH THIS WEEKEND. AS A RESULT...DIURNALLY DRIVEN SHOWERS AND THUNDERSTORMS WILL BE THE NORM OVER THE NEXT SEVERAL DAYS...WITH TEMPERATURES RUNNING NEAR SEASONAL NORMS. THE MAIN CONCERN WITH CONVECTION THE NEXT 2 DAYS WILL BE THE SLOW MOVEMENT AS STEERING WINDS REMAIN LIGHT. IN ADDITION...HIGH PRECIPITABLE WATER VALUES IN EXCESS OF ONE INCH AS EXPECTED...SO STORMS WILL BE EFFICIENT RAIN PRODUCERS. RAINFALL RATES NEAR AN INCH AN HOUR CAN BE EXPECTED WITH THE STRONGEST STORMS...SO SOME LOCALIZED FLOODING WILL BE POSSIBLE...ESPECIALLY IN POOR DRAINAGES. DUE TO THE LOCAL NATURE OF ANY FLOODING EVENTS...WILL NOT ISSUE A WATCH AT THIS TIME...BUT WILL BE SOMETHING TO MONITOR AS WE HEAD INTO THE WEEKEND. .LONG TERM (SUNDAY NIGHT THROUGH FRIDAY)... MEDIUM RANGE MODELS WERE IN GOOD AGREEMENT WITH PERSISTENT RIDGE PATTERN CONTINUING THROUGH THE COMING WEEK. THIS WILL ALLOW SUB- TROPICAL MOISTURE TO CONTINUE STREAMING NORTHEASTWARD ACROSS THE CWFA THROUGH THE COMING WEEK BRINGING SCATTERED AFTERNOON/EVENING THUNDERSTORMS ALONG WITH SOME NOCTURNAL STORMS. EXPECT TEMPERATURES TO RUN NEAR OR JUST A LITTLE ABOVE NORMAL. && .AVIATION... SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS EXPECTED THROUGH THIS WEEKEND...MAINLY AFTERNOON AND EVENING HOURS. ALTHOUGH VFR CONDITIONS ARE EXPECTED TO PREVAIL...SOME STORMS WILL LIKELY PRODUCE MOUNTAIN OBSCURATIONS AND LOCAL MVFR CONDITIONS. && .GJT WATCHES/WARNINGS/ADVISORIES... .CO...NONE. .UT...NONE. SHORT TERM...JDC LONG TERM...NL AVIATION...JDC
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 432 AM MDT FRI JUL 20 2007 COZ001>014-017>023-UTZ022>025-027>029-211100- 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- 432 AM MDT FRI JUL 20 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT ISOLATED SHOWERS AND THUNDERSTORMS WILL INCREASE TO SCATTERED THUNDERSTORMS MAINLY OVER THE HIGHER TERRAIN BY THIS AFTERNOON. NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED OVER THE SAN JUAN MOUNTAINS THIS AFTERNOON AND EVENING. IN ADDITION TO CLOUD TO GROUND LIGHTNING...MANY OF THESE STORMS WILL PRODUCE GUSTY WINDS UP TO 35 MPH...AND SOME STORMS WILL PRODUCE LOCALLY HEAVY RAIN AND SMALL HAIL. ISOLATE SHOWERS AND THUNDERSTORMS WILL LIKELY PERSIST AFTER MIDNIGHT TONIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED EVERY DAY... MAINLY DURING THE AFTERNOON AND EVENING HOURS. LIGHTNING AND GUSTY WINDS WILL BE COMMON WITH THE STORMS. A FEW OF THESE STORMS WILL GENERATE LOCALLY HEAVY RAIN SHOWERS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT...ALTHOUGH REPORTS TO THE NATIONAL WEATHER SERVICE OF HEAVY RAIN...HAIL...AND ANY WEATHER RELATED DAMAGE WOULD BE GREATLY APPRECIATED. CUOCO
The Grand Junction radar (KGJX), 8 km away, was scanning. The volume nearest the first event began at 23:36 UTC.
1 flash flood. Local standard time, as filed.
Heavy rain producing thunderstorms caused water and mud 6 inches deep to flow across Highway 65. Boulders the size of volleyballs were deposited along the road as well.
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, July 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: 50019.