Thunderstorms moved through Eastern Utah and produced strong outflow wind gusts in portions of Grand County.
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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.
Thunderstorms moved through Eastern Utah and produced strong outflow wind gusts in portions of Grand County.
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 16, 2:21 PM MST, 9 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 321 PM MDT MON AUG 16 2010 .SHORT TERM...TONIGHT THROUGH WEDNESDAY... A SERIES OF SHORTWAVES IN WESTERLY FLOW ALOFT HAS BROUGHT WAVES OF SHOWER AND THUNDERSTORM ACTIVITY TO THE REGION TODAY. THE FIRST MOVED THROUGH THE AREA THIS MORNING FOLLOWED BY A STRONGER DISTURBANCE THIS AFTERNOON. AFTERNOON STORMS HAVE BEEN FAST MOVING...THOUGH STILL CAPABLE OF PRODUCING BRIEF HEAVY RAIN. RAINFALL RATES HAVE BEEN REPORTED AS HIGH AS 2 INCHES PER HOUR...BUT ONLY LASTING FOR ABOUT A QUARTER OF AN HOUR. IN ADDITION TO HEAVY RAIN...THESE STORMS HAVE PRODUCED PEA TO HALF INCH HAIL...AND PERHAPS HIGHER FOR SOME LOCATIONS. THE SHORTWAVE WILL CONTINUE OVER THE AREA THIS EVENING... THEREFORE BOOSTED POPS SIGNIFICANTLY. NVA ON THE BACK SIDE OF THE DISTURBANCE WILL PUSH OVER THE AREA LATER TONIGHT ENDING MOIST CONVECTION AND BRINGING PARTIAL CLEARING TO THE REGION. QUIETER WEATHER INSTORE TUESDAY AS SUBSIDENCE AND DRYING WORKS OVER THE AREA FROM THE WEST...CUTTING OFF THE INFLUX OF MONSOONAL MOISTURE. THIS BREAK WILL BE SHORT-LIVED AS MONSOONAL SURGE MOVES INTO THE SOUTHWEST WEDNESDAY AFTERNOON AHEAD OF ANOTHER TROUGH OVER THE GREAT BASIN. TEMPERATURES WILL BE WARMING TO NEAR NORMAL FOR THE MIDDLE OF THE WEEK AND GENERALLY FOLLOWED MOS GUIDANCE. .LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY... EXPECT A FAIRLY ACTIVE WEDNESDAY NIGHT AND THURSDAY AS SHRT WV OVER THE GREAT BASIN SHIFTS EWRD AND PASSES OVER OUR CWA. MOISTURE APPEARS PLENTIFUL AND DYNAMICS WILL PROVIDE TRIGGER FOR ENHANCED CONVECTIVE ACTIVITY. SOME DRYING WILL TAKE PLACE FROM THE NW THURSDAY AFFECTING NE UTAH AND NW CO FOR A LITTLE LESS ACTIVITY OVER THAT THE AREA. HEIGHTS WILL REBOUND FRIDAY AS HIGH PRESSURE BEGINS TO REBUILD. HOWEVER MODERATE MOISTURE WILL REMAIN IN PLACE...BUT AS HIGH STRENGTHENS SUBSIDENCE SHOULD HELP TO LIMIT CONVECTIVE POTENTIAL. STILL BELIEVE ISOLATED COVERAGE IN THE VALLEYS WITH SCATTERED COVERAGE OVER THE MTNS WILL HANDLE THE SITUATION. MOISTURE INCREASES FROM THE SOUTH SAT/SUN AS DEPICTED BY THE GFS WHILE THE EC IS NOT NEARLY AS GENEROUS WITH MOISTURE OR QPF. THIS APPEARS TO BE THE RESULT OF MORE AMPLIFICATION WITH THE WEST COAST TROF AS SEEN IN THE GFS. WILL SPLIT THE DIFFERENCE AND INCREASE POPS SLIGHTLY DURING THIS PERIOD. ENOUGH OF A DIFFERENCE SEEN BETWEEN MDLS EARLY NEXT WEEK THAT CONFIDENCE IS LOW...SO WILL CONTINUE TREND OF MODERATELY LOW POPS. && .AVIATION... SCATTERED THUNDERSTORMS PRODUCING TORRENTIAL DOWNPOURS...SMALL HAIL AND WIND GUSTS TO 45 MPH WILL CONTINUE OVER THE ENTIRE REGION LATE THIS AFTERNOON AND INTO THE EVENING. STRONGER STORMS WILL CREATE MVFR CIGS AND VSBY OBSCURING MOUNTAINS AT TIMES. A FEW STORMS MAY BE CAPABLE OF PRODUCING IFR VISIBILITY FOR BRIEF PERIODS. DRYING WILL OCCUR OVERNIGHT BRINGING AN END TO STORMS FOLLOWED BY CLEARING SKIES. A DRY...MORE STABLE AIRMASS WILL BE OVER THE REGION ON TUESDAY... THOUGH ISOLATED AFTERNOON THUNDERSTORMS ARE POSSIBLE OVER THE MOUNTAINS OF THE CONTINENTAL DIVIDE DURING THE AFTERNOON. && .GJT WATCHES/WARNINGS/ADVISORIES... CO...NONE. UT...NONE. SHORT TERM.....NL LONG TERM......MC AVIATION.......CJC
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 547 AM MDT MON AUG 16 2010 COZ001>014-017>023-UTZ022>025-027>029-171230- 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- 547 AM MDT MON AUG 16 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED OVER MUCH OF THE AREA TODAY...WITH FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN BEING THE MAINS THREATS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY CHANCES OF LATE-DAY SHOWERS AND THUNDERSTORMS RETURN FOR THESE PERIODS. THE BEST CHANCE FOR SHOWERS WILL FAVOR MONDAY AND THURSDAY. .SPOTTER INFORMATION STATEMENT SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT. CJC
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
313 PM MDT MON AUG 16 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1230 PM TSTM WND DMG GRAND JUNCTION 39.09N 108.55W
08/16/2010 MESA CO BROADCAST MEDIA
SMALL SHED BLOWN INTO A CAR AND LANDED ON TOP OF A
FENCE.
&&
EVENT NUMBER GJT1000658
PRINGLEThe Grand Junction radar (KGJX), 138 km away, was scanning. The volume nearest the first event began at 21:29 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm wind gusts to 61 mph were measured at Canyonlands Field Airport.
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, August 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: 353289.