Heavy rainfall resulted in a significant debris flow.
Every event with a place to put it. 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 rainfall resulted in a significant debris flow.
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 15, 1:36 PM MST, 2 hours 46 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 236 PM MDT FRI AUG 15 2014 .SHORT TERM...(TONIGHT THROUGH SATURDAY NIGHT) ISSUED AT 235 PM MDT FRI AUG 15 2014 THE DRYING TREND IS UNDERWAY TODAY...BUT AT A SLOWER RATE THAN HAD BEEN ADVERTISED. THIS MORNING'S 12Z GJT SOUNDING STILL SHOWED JUST OVER AN INCH OF PWAT...SAME AS THE PREVIOUS 00Z SOUNDING FROM THU AFTERNOON. ALSO TODAY'S EARLY AFTERNOON DEWPOINTS ARE STILL IN THE LOW-MID 50S IN THE LOWER VALLEYS. MODELS ALSO SHOW A WEAK UPPER DISTURBANCE PASSING OVER THE NORTH THIS AFTERNOON...WHICH MAY BE HELPING ENHANCE TODAY'S CONVECTION. HAVE HAD REPORTS OF SMALL HAIL ALONG WITH HEAVY RAIN FOR A FEW OF CELLS THAT HAVE DEVELOPED. WILL WATCH THESE STORMS CLOSELY...MAINLY FOR RUNOFF PROBLEMS AS ONE STORM PUT DOWN 0.9 INCH OF RAIN IN AROUND AN HOUR. THE UPPER WAVE IS SET TO PASS BY LATE THIS AFTERNOON/EARLY THIS EVENING. SO ONCE HEATING SUBSIDES...CONVECTION SHOULD QUICKLY DIE OUT...WITH SKIES CLEARING LATE TONIGHT. HIGH PRESSURE STRENGTHENS OVER NORTHWEST AZ AND FAR SOUTHWEST UT ON SAT WITH HEIGHTS RISING ACROSS OUR FORECAST AREA. WHILE MOISTURE WILL STILL BE SLOW TO ERODE UNDER THE WEST-NORTHWEST FLOW...AFTERNOON CONVECTION IS AGAIN EXPECTED TO TAKE A DOWNTURN. THE NAM SHOWS PWAT VALUES BETWEEN 0.5 AND 0.75 INCH DURING THE AFTERNOON...WHICH IS A NOTCH LOWER THAN TODAY/S. TEMPERATURES SHOULD CLIMB TO AROUND NORMAL VALUES. CONVECTION SHOULD AGAIN QUICKLY DIMINISH AFTER MAX HEATING WITH SKIES CLEARING BY MIDNIGHT. .LONG TERM...(SUNDAY THROUGH FRIDAY) ISSUED AT 235 PM MDT FRI AUG 15 2014 UPPER RIDGE FLATTENS SLIGHTLY AS AN UPPER LEVEL LOW TRACKS OVER THE NORTHERN ROCKIES. THE AIRMASS SHOULD REMAIN DRY WITH ONLY REMNANT MOISTURE LEFT. A FEW ISOLATED STORMS OVER THE HIGHER PEAKS SHOULD BE POSSIBLE. TEMPERATURES WILL CONTINUE NEAR TO SLIGHTLY ABOVE NORMAL. THE RIDGE REMAINS DOMINANT THROUGH THE MIDDLE OF NEXT WEEK. SLIGHT INCREASE OF MOISTURE BY TUESDAY SHOULD INCREASE CHANCES OF STORMS. THE AMOUNT OF MOISTURE WILL DEPEND ON THE PLACEMENT OF AN UPPER LOW THAT MODELS DEVELOP ALONG THE PAC NORTHWEST COAST. MODELS HAVE BEEN CONSISTENT WITH DEVELOPING THE LOW BUT PLACEMENT AND TIMING HAS NOT BEEN CONSISTENT. THE CURRENT MODEL RUN OF BOTH THE EC AND GFS HAS THE LOW MOVING SOUTH ALONG THE PAC COAST TO NEAR MIDDLE OF CA BY WEDNESDAY. THE LOW THEN RETROGRADES WEST OUT TO SEA. IF THE LOW CHANGES POSITION IT COULD ENHANCE THE MOISTURE PLUME PROGRESSION NORTHWARD OVER THE REGION. FOR NOW DO NOT EXPECT A LARGE SURGE OF MOISTURE. TEMPERATURES SHOULD CLIMB TO NEAR NORMAL BY SUNDAY AND REMAIN NEAR OF SLIGHTLY ABOVE NORMAL VALUES THROUGH THE END OF THE WEEK. && .AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SATURDAY AFTERNOON) ISSUED AT 1044 AM MDT FRI AUG 15 2014 SCATTERED -SHRA/-TSRA WILL DEVELOP EARLY THIS AFTERNOON...PEAKING BETWEEN 23Z-01Z...AND WILL BE PRIMARILY OVER THE HIGHER TERRAIN. ISOLATED STORMS WILL PRODUCE +SHRA/+TSRA WITH LOWER CIGS...BUT THE CHANCE OF THIS OCCURRING AT A TAF SITE IS ABOUT 10 PERCENT. THUNDERSTORMS WILL BE DIMINISHING AFTER 01Z THIS EVENING WITH SKC CONDITIONS AFTER 06Z TONIGHT. && .GJT WATCHES/WARNINGS/ADVISORIES... CO...NONE. UT...NONE. && SHORT TERM...EH LONG TERM...AS AVIATION...EH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 623 AM MDT FRI AUG 15 2014 COZ001>014-017>023-UTZ022>025-027>029-161230- 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- 623 AM MDT FRI AUG 15 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS WILL OCCUR THIS AFTERNOON...MOSTLY OVER THE WESTERN COLORADO MOUNTAINS. ISOLATED STORMS MAY PRODUCE BRIEF MODERATE TO HEAVY SHOWERS .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SATURDAY THROUGH MONDAY...DRY EXCEPT FOR ISOLATED AFTERNOON THUNDERSTORMS OVER THE WESTERN COLORADO HIGH COUNTRY. TUESDAY AND WEDNESDAY...THE THREAT OF AFTERNOON THUNDERSTORMS MAY INCREASE OVER SOUTHWEST COLORADO. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
208 PM MDT FRI AUG 15 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0156 PM HEAVY RAIN DEBEQUE 16NW 39.50N 108.38W
08/15/2014 M0.96 INCH GARFIELD CO CO-OP OBSERVER
RAIN BEGAN AT 1 PM. SMALL HAIL OCCURRED ABOUT 120 PM.
&&
EVENT NUMBER GJT1401387
JADSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND JUNCTION CO 217 PM MDT FRI AUG 15 2014 COZ003-007-009-152045- ROAN AND TAVAPUTS PLATEAUS-GRAND AND BATTLEMENT MESAS-DEBEQUE TO SILT CORRIDOR- 217 PM MDT FRI AUG 15 2014 ...A STRONG THUNDERSTORM WILL AFFECT ROAN AND TAVAPUTS PLATEAUS... GRAND AND BATTLEMENT MESAS...DEBEQUE TO SILT CORRIDOR... AT 215 PM MDT...A STRONG THUNDERSTORM WAS NEAR DE BEQUE...OR 26 MILES NORTHEAST OF GRAND JUNCTION...MOVING SOUTHEAST AT 10 MPH. AS THIS STORM MOVES OVER DE BEQUE AND INTERSTATE 70...WIND GUSTS WILL EXCEED 35 MPH...AND HALF INCH HAIL IS POSSIBLE. LOCATIONS IMPACTED INCLUDE... DE BEQUE AND BATTLEMENT MESA. LAT...LON 3938 10844 3950 10823 3935 10788 3917 10821 TIME...MOT...LOC 2015Z 299DEG 9KT 3938 10823 CC
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
230 PM MDT FRI AUG 15 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0226 PM DEBRIS FLOW CANYONLANDS NP - NECK 38.46N 109.82W
08/15/2014 SAN JUAN UT CO-OP OBSERVER
FROM AN EMAIL - DUE TO RECENT HEAVY RAINS AND RESULTING
WASHOUTS AND DEEP MUD... PARTS OF THE WHITE RIM TRAIL IN
CANYONLANDS IS NOT PASSABLE
&&
EVENT NUMBER GJT1401388
TGJTThe national radar mosaic for the moment the first event began.
1 debris flow. Local standard time, as filed.
Highway 550 was closed due to a debris flow at mile marker 100 in the Uncompahgre River valley near Portland. Mud, trees and tires all flowed across both lanes of the roadway.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2014Every state in 2014This day in weather historyWarnings in Colorado, August 2014
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: 548919.