Monsoonal moisture focused on eastern Utah resulted in heavy rainfall at a rate of one inch per hour which caused flooding and debris flows in some areas.
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.
Monsoonal moisture focused on eastern Utah resulted in heavy rainfall at a rate of one inch per hour which caused flooding and debris flows in some areas.
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 19, 4:38 PM MST, 52 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 538 PM MDT TUE AUG 19 2014 .SHORT TERM...(TONIGHT THROUGH WEDNESDAY NIGHT) ISSUED AT 344 PM MDT TUE AUG 19 2014 CURRENT IR SATELLITE SHOWS TWO PRECIPITATION HOT SPOTS - ONE WEST OF VERNAL AND THE OTHER DOWN BY THE FOUR CORNERS. RADAR RETURNS SHOW THE OUTER PERIPHERY OF THE ENHANCEMENT AT BLANDING UTAH AT 315PM. THIS RAIN WILL EXPAND TO THE NORTHEAST THROUGH THE LATE AFTERNOON AND EVENING AS PRECIPITABLE WATER VALUES REACH THEIR MAXIMUM OF ONE INCH TO 1.2 INCHES ACROSS THE REGION. A SERIES OF H5 VORT MAXES ALONG WITH AN APPROACHING H3 50KT JET WILL MOVE INTO THE AREA THIS EVENING...HELPING TO SUSTAIN SHOWERS AND OCCASIONAL EMBEDDED THUNDERSTORMS. STORM MOTION STILL LOOKS TO BE 20 TO 30 KTS WITH MINIMAL TRAINING OCCURRING SO FAR. SOME SUBSIDENCE OVER THE REGION TOMORROW WILL HINDER HIGH LIKELIHOOD OF SHOWERS AND THUNDERSTORMS...HOWEVER FORECAST CIN IS LOW OR NONEXISTENT BY THE AFTERNOON...AND AMPLE MOISTURE AND BREAKS IN THE CLOUDS WILL BE IN PLACE TO INITIATE ISOLATED/SCATTERED CONVECTION IN THE AFTERNOON. STEERING FLOW WILL SLOW BY MIDDAY TO 10 TO 15 KTS. EXPECTING ACTIVITY TO OCCUR EARLIER IN THE AFTERNOON AND TAPER OFF FOR THE MOST PART IN THE EVENING. .LONG TERM...(THURSDAY THROUGH TUESDAY) ISSUED AT 344 PM MDT TUE AUG 19 2014 WEATHER THE LAST HALF OF THE WEEK DEPENDS LARGELY ON THE UPPER LOW CURRENTLY DROPPING SOUTH ALONG THE CA COAST. MODELS CONTINUE TO HAVE SOME DIFFICULTY HANDLING THIS LOW. THE GFS REMAINS THE MOST PROGRESSIVE...SWINGING IT IN INLAND ACROSS SRN CA THU AND UP THROUGH ERN UT/WRN CO THU NIGHT. THE NAM AND ECMWF ARE SLOWER BY ABOUT 12-24 HRS ON A TRACK A LITTLE FARTHER SOUTH. NUDGED POPS UPWARD THU-FRI BUT REMAINED CONSERVATIVE DUE TO THE TIMING DIFFERENCES. SOME STORMS COULD BE RATHER STRONG THU-FRI GIVEN THAT THE DEEP LAYER Q-G FORCING MAXIMA MOVES ACROSS THE AREA...AND 0-6KM VERTICAL WIND SHEAR INCREASES WITH TROUGH PASSAGE...REGARDLESS OF MODEL. MODELS ALSO HINT AT BRIEF ENTRAINMENT OF SOME MOISTURE FROM TROPICAL STORM LOWELL...REFLECTED MORE IN THE 320K/325K ISENTROPIC SURFACE HUMIDITY THAN PRECIPITABLE WATER FORECAST. CONCURRENTLY...SHORTWAVE ENERGY SHARPENS AN UPPER TROUGH OVER THE PAC NW AND NRN ROCKIES LATE IN THE WEEK. THIS TROUGH THEN SLOWLY MIGRATES EASTWARD TO THE NORTHERN PLAINS AND SOUTHERN CANADA BY MONDAY AFTERNOON. THIS SHOULD RESULT IN SOMEWHAT DRIER WESTERLY FLOW ACROSS OUR AREA BY SUNDAY FOR A DOWNTURN IN SHOWER AND STORM ACTIVITY THIS WEEKEND THROUGH EARLY NEXT WEEK. && .AVIATION...(FOR THE 00Z TAFS THROUGH 00Z WEDNESDAY EVENING) ISSUED AT 530 PM MDT TUE AUG 19 2014 PLENTY OF RAIN AND STORMS CONTINUING THIS EVENING WITH ALL AERODROMES POSSIBLY SEEING -RA OR -TSRA ON STATION. MODELS CONTINUE TO SHOW PRECIP CONTINUING OVERNIGHT...EVEN INCREASING AFTER 03Z BEFORE SLACKENING OFF SOME AFTER 12Z. EXPECT CONDITIONS TO REMAIN THE SAME THEN THROUGH THIS EVENING INTO THE OVERNIGHT WITH IFR/MVFR OCCURRING FROM TIME TO TIME DUE TO HEAVIER RAINFALL DROPPING VISIBILITIES. THERE WILL BE OCCNL BREAKS BUT FLIGHT CONDITIONS WILL BE AFFECTED FOR QUITE SOME TIME. MTN OBSCURATIONS WILL ALSO OCCUR AS WILL OCCNL GUSTY SURFACE WINDS. && .HYDROLOGY... ISSUED AT 344 PM MDT TUE AUG 19 2014 MONSOONAL MOISTURE IS RETURNING THIS EVENING AS AN UPPER LEVEL LOW OVER CALIFORNIA PULLS DEEP SUBTROPICAL MOISTURE INTO THE REGION. SHOWERS AND THUNDERSTORMS WILL INCREASE IN COVERAGE FROM WEST TO EAST THIS EVENING...PEAKING THIS EVENING THEN CONTINUING OVERNIGHT INTO WEDNESDAY MORNING. EXPECT SOME SMALL STREAM AND ARROYO FLOOD ISSUES BY WEDNESDAY MORNING IN THE USUAL PROBLEM AREAS. HOWEVER...DO NOT EXPECT SUFFICIENTLY WIDESPREAD COVERAGE OF TORRENTIAL DOWNPOURS TO WARRANT FLASH FLOOD WATCH. && .GJT WATCHES/WARNINGS/ADVISORIES... CO...NONE. UT...NONE. && SHORT TERM...JAM LONG TERM...JAD AVIATION...TGR HYDROLOGY...NL/JAM
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
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
109 PM MDT TUE AUG 19 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0128 AM NON-TSTM WND GST 5 NW MACK 39.27N 108.93W
08/19/2014 M49 MPH MESA CO TRAINED SPOTTER
&&
EVENT NUMBER GJT1401399
JMSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND JUNCTION CO 546 PM MDT TUE AUG 19 2014 COZ001>014-017>023-UTZ022>025-027>029-200900- 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- INCLUDING THE CITIES OF...RANGELY...DINOSAUR...CRAIG...HAYDEN... MEEKER...RIO BLANCO...COLUMBINE...TOPONAS... STEAMBOAT SPRINGS AND VICINITY...GRAND JUNCTION...FRUITA... PALISADE...RIFLE...SILT...PARACHUTE...MESA...GLENWOOD SPRINGS... EAGLE...CARBONDALE...SKYWAY...ASPEN...VAIL...SNOWMASS... CEDAREDGE...DELTA...HOTCHKISS...MONTROSE...CRESTED BUTTE... TAYLOR PARK...MARBLE...BUFORD...TRAPPERS LAKE...GUNNISON... CIMARRON...RIDGWAY...GLADE PARK...OURAY...TELLURIDE...LAKE CITY... SILVERTON...RICO...HESPERUS...GATEWAY...NUCLA...CORTEZ... DOVE CREEK...MANCOS...DURANGO...BAYFIELD...IGNACIO... PAGOSA SPRINGS AND VICINITY...BLANDING...BLUFF...MEXICAN HAT... MANILA...DUTCH JOHN...VERNAL...JENSEN...BALLARD...FORT DUCHESNE... RANDLETT...MOAB...CASTLE VALLEY...THOMPSON SPRINGS... MONTICELLO AND VICINITY 546 PM MDT TUE AUG 19 2014 ...HEAVY RAIN CONTINUES TONIGHT... SUBTROPICAL MOISTURE HAS RETURNED TO EASTERN UTAH AND WESTERN COLORADO WITH PLENTY OF RAIN SHOWERS AND THUNDERSTORMS NOW MOVING THROUGH THE AREA. THESE SHOWERS AND STORMS WILL CONTINUE THROUGH THE EVENING HOURS AND PERSIST PAST MIDNIGHT AS DISTURBANCES MOVE THROUGH. RAINFALL AMOUNTS FROM STRONGER SHOWERS AND THUNDERSTORMS WILL LIKELY EXCEED ONE INCH. THIS COULD LEAD TO LOCALIZED FLASH FLOODING...ROCK SLIDES...AND DEBRIS FLOWS. SLOT CANYONS...ARROYOS...AND WILDFIRE BURN SCAR AREAS WILL BE ESPECIALLY VULNERABLE TO FLASH FLOODS. STAY INFORMED ON THIS SITUATION AT WWW.WEATHER.GOV/GJT. PLEASE REPORT ANY HEAVY RAIN...FLOODING...OR SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN GRAND JUNCTION OR TO YOUR LOCAL LAW ENFORCEMENT OFFICE.
The Grand Junction radar (KGJX), 108 km away, was scanning. The volume nearest the first event began at 00:32 UTC.
1 debris flow, 1 flash flood. Local standard time, as filed.
UDOT reported a flash flood and debris flow up to a foot deep across highway 128 near mile marker 18 where Professor Creek intersects the roadway. The road was closed approximately 2 hours due to flash flooding and the post-flood debris removal.
Flash flooding occurred in a residential section of Maeser, with street flooding also reported in nearby areas. Most of the flood damage occurred to landscaping.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2014Every state in 2014This day in weather historyWarnings in Utah, 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: 548920, 548921.