An intense thunderstorm produced heavy rainfall in portions of Eagle County, including a flash flood.
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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.
An intense thunderstorm produced heavy rainfall in portions of Eagle County, including a flash flood.
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 Jun 30, 3:43 PM MST, 2 hours 47 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 443 PM MDT TUE JUN 30 2015 .SHORT TERM...(TONIGHT THROUGH WEDNESDAY NIGHT) ISSUED AT 328 PM MDT TUE JUN 30 2015 FIRST THUNDERSTORMS OF THE AFTERNOON OCCURRED IN NE UTAH WHERE DEEPER MOISTURE WAS ADVECTING IN FROM THE WEST. THIS MOISTURE ADVECTION CONTINUES ACROSS NE UTAH AND NW CO THIS LATE AFTERNOON AND EVENING. STORMS ACROSS THE NORTH WILL BE CAPABLE OF PRODUCING STRONG OUTFLOW WINDS AND SMALL HAIL THIS AFTERNOON. SCATTERED NORTHERN STORMS ARE PERSIST BEYOND SUNSET THEN ISOLATED SHOWERS THERE OVERNIGHT. ELSEWHERE STORMS WILL END WITH SUNSET. TEMPERATURES REMAIN ABOVE NORMAL OVERNIGHT. HIGH PRESSURE WILL RETROGRADE OVER NEVADA ON WEDNESDAY...ALLOWING FOR A TRAILING SHORT WAVE TO DRAG ACROSS NW COLORADO LATE IN THE DAY. THIS BOOSTS DIURNALLY DRIVEN CONVECTION AND ALLOW FOR SOME STORMS TO MIGRATE OFF THE HIGHER TERRAIN AND IMPACT VALLEY AREAS...AT LEAST FOR A 1-3 HOUR PERIOD LATE IN THE DAY. WITH THE SHORT MOVING DOWNSTREAM BY NIGHTFALL...STORMS SHOULD BE ENDING BY LATE EVENING. .LONG TERM...(THURSDAY THROUGH TUESDAY) ISSUED AT 328 PM MDT TUE JUN 30 2015 THURSDAY AND FRIDAY...DRIER AIR SPREADS INTO THE FORECAST AREA FROM THE NW AND LOWERS CONVECTIVE POTENTIAL. THE ONLY AREA THAT MIGHT OBSERVE A LATE DAY STORM WILL BE THE COLORADO HIGH COUNTRY...OR TOWARD THE COLORADO SPINE AND THE SAN JUAN MOUNTAINS AND NEARBY FOOTHILLS. SIMILAR CONDITIONS ON FRIDAY...HOWEVER THE AIR MASS WILL NOT BE QUITE AS DRY AND ISOLATED MOUNTAIN STORMS SHOULD OCCUR FARTHER WEST. SATURDAY THROUGH TUESDAY...PATTERN CHANGE OCCURS AS HIGH PRESSURE ALOFT SHIFTS FROM COLORADO ON SATURDAY TO THE SRN PLAINS BY NEXT TUESDAY. MONSOONAL MOISTURE SURGE GETS GOING ON SUNDAY AND CONTINUES INTO TUESDAY. SUNDAY MAY BE THE BEST DAY FOR THUNDERSTORM COVERAGE AS A PASSING SHORT WAVE TO OUR NORTH ALLOWS FOR BETTER MOISTURE TRANSPORT. THE GFS SHOW PRECIPITABLE WATER EXCEEDING ONE INCH OVER THE ERN UTAH DESERTS. HOWEVER THE ECMWF SHOW SOME DIFFERENCES IN TERMS OF THE STRENGTH OF THIS MONSOONAL SURGE. GIVEN A BLEND OF SOLUTIONS...THE FORECAST FOR DAYS 5 THROUGH 7 TENDS TO BE MORE BROADBRUSH. EITHER WAY THE MEDIUM RANGE MODELS INDICATE THAT THE "MONSOON" SEASON ARRIVES IN EARNEST NEXT WEEK. && .AVIATION...(FOR THE 00Z TAFS THROUGH 00Z WEDNESDAY EVENING) ISSUED AT 443 PM MDT TUE JUN 30 2015 AFTERNOON INSTABILITY IS ALLOWING FOR SCATTERED TO ISOLATED THUNDERSTORM COVERAGE ACROSS NORTHWEST COLORADO AND NORTHEAST UTAH. THE KVEL...KEGE...AND KASE TERMINAL HAVE THE BEST CHANCES OF BEING IMPACTED BY THIS WEATHER THROUGH 01/04Z. WIND GUSTS TO 40 MPH WILL THE MAIN IMPACTS AS RAINFALL RATES MAY NOT BE ENOUGH TO REDUCE VSBYS TO MVFR LEVELS. THEREFORE VFR CONDITIONS ARE EXPECTED TO PREVAIL OVER THE NEXT 24 HOURS. MOISTURE INCREASES ACROSS THE REGION ON WEDNESDAY WHICH SHOULD LEAD TO A NOTICEABLE INCREASE IN THUNDERSTORM COVERAGE DURING THE AFTERNOON HOURS. && .GJT WATCHES/WARNINGS/ADVISORIES... CO...NONE. UT...NONE. && SHORT TERM...JOE/PF LONG TERM...PF AVIATION...TGJT
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 346 AM MDT TUE JUN 30 2015 COZ001>014-017>023-UTZ022>025-027>029-011000- LOWER YAMPA RIVER BASIN-CENTRAL YAMPA RIVER BASIN- ROAN AND TAVAPUTS PLATEAUS-ELKHEAD AND PARK MOUNTAINS- UPPER YAMPA RIVER BASIN-GRAND VALLEY-DEBEQUE TO SILT CORRIDOR- CENTRAL COLORADO RIVER BASIN-GRAND AND BATTLEMENT MESAS- GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS- CENTRAL GUNNISON AND UNCOMPAHGRE RIVER BASIN- WEST ELK AND SAWATCH MOUNTAINS-FLATTOPS- UPPER GUNNISON RIVER VALLEY-UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE- NORTHWEST SAN JUAN MOUNTAINS-SOUTHWEST SAN JUAN MOUNTAINS- PARADOX VALLEY/LOWER DOLORES RIVER- FOUR CORNERS/UPPER DOLORES RIVER-ANIMAS RIVER BASIN- SAN JUAN RIVER BASIN-SOUTHEAST UTAH-EASTERN UINTA MOUNTAINS- EASTERN UINTA BASIN-TAVAPUTS PLATEAU-ARCHES/GRAND FLAT- LA SAL AND ABAJO MOUNTAINS-CANYONLANDS/NATURAL BRIDGES- 346 AM MDT TUE JUN 30 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP OVER THE MOUNTAINS LATE THIS AFTERNOON AND EARLY THIS EVENING...MAINLY OVER THE MOUNTAINS OF CENTRAL AND NORTHWEST COLORADO. A FEW STORMS WILL DRIFT OVER THE VALLEYS THIS EVENING. GUSTY WINDS TO 40 MPH...SMALL HAIL AND BRIEF HEAVY RAIN WILL OCCUR IN THE VICINITY OF THESE THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY A CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS IS EXPECTED EACH DAY WITH THE CENTRAL AND SOUTHERN COLORADO MOUNTAINS FAVORED. THUNDERSTORMS MAY BECOME MORE NUMEROUS MONDAY AFTERNOON. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. CJC
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
606 PM MDT TUE JUN 30 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0555 PM TSTM WND GST 3 NNE GRAND JUNCTION 39.13N 108.54W
06/30/2015 M51 MPH MESA CO ASOS
&&
EVENT NUMBER GJT1500853
NLThe Grand Junction radar (KGJX), 137 km away, was scanning. The volume nearest the first event began at 01:31 UTC.
1 flash flood. Local standard time, as filed.
Heavy rainfall from an intense thunderstorm produced a flash flood which deposited mud and other debris up to four feet deep onto East Brush Creek Road. The road was closed for several hours until road crews cleared the debris.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2015Every state in 2015This day in weather historyWarnings in Colorado, June 2015
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: 575487.