Subtropical moisture across the area combined with afternoon heating to generate heavy rain producing thunderstorms, which resulted in areas of flash flooding in southeast Utah. Strong thunderstorms also produced damaging wind gusts and lightning caused fires across portions of the eastern Uintah Basin.
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.
Subtropical moisture across the area combined with afternoon heating to generate heavy rain producing thunderstorms, which resulted in areas of flash flooding in southeast Utah. Strong thunderstorms also produced damaging wind gusts and lightning caused fires across portions of the eastern Uintah Basin.
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 28, 1:35 PM MST, 1 hour 55 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 235 PM MDT WED JUL 28 2010 .SHORT TERM...TONIGHT THROUGH FRIDAY... MONSOONAL PLUME SURGING INTO ERN UTAH THIS AFTERNOON AND WILL SPREAD INTO WEST CENTRAL COLORADO THIS EVENING. TWO DETAILS THAT WILL ENHANCE RAINFALL POTENTIAL...EMBEDDED DISTURBANCE ROTATING AROUND SUBTROPICAL HIGH CORE MOVES ACROSS ERN UTAH. THE SECOND ITEM IS THAT A GOOD PORTION OF ERN UTAH AND WRN COLORADO STARTED THE DAY UNDER MOSTLY CLEAR CONDITIONS AND THEREBY ENHANCING CONVECTIVE POTENTIAL. GRADIENT FLOW IS EXTREMELY WEAK SO CELL MOVEMENT WILL BE SLOW. GIVEN THE LACK OF SHEAR...STORMS WILL MAINLY BE PULSE TYPES...BUT WILL BE SLOW TO DISSIPATE IN THE VERY MOIST ENVIRONMENT AND THEREFORE CELL MERGERS MAY BECOME COMMON LATE THIS AFTERNOON THROUGH EARLY EVENING. RAISED POPS AND EXPANDED THE AREA OF THE FLASH FLOOD WATCH TO INCLUDE THE WRN COLORADO VALLEYS GIVEN THE CLOSE PROXIMITY OF THE VORT CENTER ALOFT. THURSDAY AND THURSDAY EVENING...ENVIRONMENT WILL BE AS MOIST AS IT POSSIBLY CAN WITH 700 MB SPECIFIC HUMIDITIES RANGING FROM 9 TO 12 G PER KG. THE FORECAST QUESTION WOULD BE THE AMOUNT OF LEFTOVER CLOUD COVER TO START THE DAY ON THURSDAY. ANY CLEARING DURING THE MORNING HOURS WILL RAISE CONVECTIVE POTENTIAL IN THE SUBTROPICAL ENVIRONMENT THAT EXISTS. HAVE ISSUED A FLASH FLOOD WATCH FOR THE ENTIRE FORECAST AREA ON THURSDAY AND THE DEEP MOISTURE EXPANDS NORTH. FRIDAY...SUBTROPICAL HIGH CORE SHIFTS SLIGHTLY WESTWARD...JUST ENOUGH TO CHANGE THE AIR CURRENT TO WESTERLY. THE RESULT IS THAT DRIER AIR ADVECTS INTO THE NRN HALF...BUT NOT DRY AS SCATTERED SHOWERS AND STORMS WILL STILL OCCUR FOR THIS AREA. THE BIGGER STORMS WITH A FEW HEAVY RAINERS WILL STILL EXIST ACROSS THE SRN REGION. .LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY... RIDGE AXIS REMAINS EAST OF THE CONTINENTAL DIVIDE INTO THE EXTENDED PERIOD ALLOWING THE SOUTHWESTERLY MOIST MONSOONAL PATTERN TO PERSIST OVER THE FORECAST AREA. SLIGHT DRYING IS PROGGED FRIDAY NIGHT INTO EARLY SATURDAY BUT STILL CONTINUED SLIGHT CHANCE/CHANCE POPS. MOISTURE INCREASES LATER SATURDAY INTO SUNDAY IN RESPONSE TO A STRONGER DISTURBANCE WHICH WILL MOVE ACROSS THE REGION IN THE SOUTHWESTERLY FLOW. HAVE INCREASED POPS LATER SATURDAY INTO SUNDAY AS A RESULT...WITH THE POTENTIAL FOR HEAVY RAIN AND FLOODING THROUGH THE WEEKEND. MODELS SHOW SOME SIGN OF SLIGHTLY DRYING THE ATMOSPHERE NEXT WEEK BUT WITH THE RIDGE AXIS EAST OF US DECIDED TO GO WITH A PERSISTENT WETTER PATTERN AND INCREASED CLOUDS AND POPS WITH BROADBRUSH THROUGH THE MIDDLE OF NEXT WEEK. FORECASTED MAXIMUM TEMPERATURES ARE EXPECTED TO BE NEAR OR SLIGHTLY BELOW NORMAL INTO NEXT WEEK. && .AVIATION... NUMEROUS THUNDERSTORMS WITH LOCALLY HEAVY RAINFALL WILL BE COMMON BETWEEN 18Z TO 03Z TODAY AND AGAIN ON THURSDAY. STORMS WILL CREATE AREAS OF MOUNTAIN OBSCURATIONS WITH MVFR CIGS AND VIS IN RAIN SHOWERS. LOCALIZED IFR CIGS AND VIS ARE LIKELY IN THE SAN JUAN... LA SAL AND ABAJO MOUNTAINS AND THE LOWER ELEVATIONS OF THE FOUR CORNERS AREA DUE TO HEAVY RAINFALL. && .GJT WATCHES/WARNINGS/ADVISORIES... CO...NONE UT...NONE. SHORT TERM.....PF LONG TERM......MPM/EH AVIATION.......TGJT
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 545 AM MDT WED JUL 28 2010 COZ001>014-017>023-UTZ022>025-027>029-291145- 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- 545 AM MDT WED JUL 28 2010 ...FLASH FLOOD WATCH IN EFFECT THIS AFTERNOON AND EVENING FOR SOUTHEAST UTAH AND SOUTHWEST COLORADO... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS MUCH OF WESTERN COLORADO AND EASTERN UTAH THROUGH TONIGHT. THE STRONGEST THUNDERSTORMS WILL PRODUCE SMALL HAIL...GUSTY WINDS TO 50 MPH AND VERY HEAVY RAINFALL. THE HEAVY RAINFALL WILL LEAD TO THE POSSIBILITY OF FLASH FLOODING...ESPECIALLY ACROSS THE SAN JUAN MOUNTAINS IN SOUTHWEST COLORADO AND NEAR NARROW SLOT CANYONS ACROSS SOUTHEAST UTAH. AS A RESULT...A FLASH FLOOD WATCH HAS BEEN ISSUED FOR THESE AREAS FOR THIS AFTERNOON AND EVENING. PLEASE SEE THE GRAND JUNCTION NATIONAL WEATHER SERVICE WEB SITE AT HTTP://WEATHER.GOV/GJT FOR THE LATEST INFORMATION. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY DEEP MONSOONAL FLOW INTO UTAH AND COLORADO WILL CONTINUE THROUGH THIS WEEKEND. THIS WILL BRING NUMEROUS SHOWERS AND THUNDERSTORMS WITH LOCALLY HEAVY RAINS. THE POTENTIAL EXISTS FOR LOCALIZED FLASH FLOODING EACH AFTERNOON AND EVENING THROUGH SUNDAY. MONDAY AND TUESDAY...MONSOONAL FLOW WEAKENS BUT SUFFICIENT MOISTURE WILL REMAIN FOR SCATTERED LATE DAY SHOWERS AND THUNDERSTORMS. LOCALLY HEAVY RAIN WILL STILL BE POSSIBLE. A FEW SHOWERS AND THUNDERSTORMS ARE EXPECTED DURING THE OVERNIGHT PERIODS AS WELL. .SPOTTER INFORMATION STATEMENT SPOTTER ACTIVATION IS POSSIBLE IN SOME AREAS TODAY. REPORTS OF SIGNIFICANT WEATHER WILL AGAIN BE APPRECIATED. JDC
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND JUNCTION CO 328 PM MDT WED JUL 28 2010 COZ011-017-282215- CENTRAL GUNNISON AND UNCOMPAHGRE RIVER BASIN CO-UNCOMPAHGRE PLATEAU/DALLAS DIVIDE CO- 328 PM MDT WED JUL 28 2010 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN MONTROSE COUNTY UNTIL 415 PM MDT... AT 325 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 11 MILES SOUTHWEST OF OLATHE...OR 13 MILES WEST OF MONTROSE...MOVING NORTH AT 10 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... MAINLY RURAL AREAS OF NORTHERN MONTROSE COUNTY. THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. MM
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND JUNCTION CO 346 PM MDT WED JUL 28 2010 COZ002-003-013-282230- CENTRAL YAMPA RIVER BASIN CO-FLATTOPS CO-ROAN AND TAVAPUTS PLATEAUS CO- 346 PM MDT WED JUL 28 2010 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN RIO BLANCO COUNTY UNTIL 430 PM MDT... AT 341 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING AN AREA OF STRONG THUNDERSTORM 8 MILES SOUTHEAST OF MEEKER...OR 39 MILES NORTHWEST OF GLENWOOD SPRINGS...MOVING NORTHEAST AT 5 MPH. HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... MEEKER... BUFORD... THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. MM
The Cedar City radar (KICX), 244 km away, was scanning. The volume nearest the first event began at 22:30 UTC.
1 flash flood, 1 thunderstorm wind. Local standard time, as filed.
Heavy rain caused flash flooding to occur near Goulding's Lodge in the Monument Valley area of southeast Utah. Rushing water up to a foot deep flowed across County Road 420, which was washed out in one location.
Thunderstorm winds extended across a large portion of the eastern Uintah Basin and brought down numerous trees and power lines. Downed trees in the Lapoint area damaged a vehicle and home. Small hail was also reported with this line of storms, as well as numerous small lightning caused fires.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2010Every state in 2010This day in weather historyWarnings in Utah, July 2010
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: 250056, 354659.