There was slight improvement to overall drought conditions, though much of the area remained abnormally dry in September.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
There was slight improvement to overall drought conditions, though much of the area remained abnormally dry in September.
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 31, 1:08 PM MST, 10 hours 52 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 208 PM MDT TUE AUG 31 2010 .SHORT TERM...TONIGHT THROUGH THURSDAY... DRY WESTERLY FLOW BEHIND LAST NIGHTS TROUGH PASSAGE WILL CONTINUE OVER THE AREA WED AND THU. DEW POINTS OUGHT TO REMAIN IN THE 20S AND LOWER 30S AT MOST LOCATIONS AND VERY LITTLE MOISTURE IS FORESEEN IN FORECAST SOUNDING OR TIME-HEIGHT GRAPHS. SO WILL CONSIDERABLY REDUCE PREDICTED CLOUD COVER IN THE GRIDS AND ELIMINATE ALL CHANCE OF PRECIP FOR THE NEXT 48 HOURS. WED NIGHT AND THU THE RIDGE BUILDS NORTHWEST INTO THE GREAT BASIN...AS A WEAK SHORTWAVE TROUGH PASSES THROUGH THE NORTHERN ROCKIES. THE FLOW ALOFT WILL BECOME MORE NORTHWESTERLY AND THERE SHOULD BE A LITTLE COOLING...BUT NO PRECIPITATION IS EXPECTED. .LONG-TERM...THURSDAY NIGHT THROUGH TUESDAY...A HINT OF FALL IN THE AIR... THURSDAY NIGHT...BEHIND THE COOL FRONT THAT PASSED WEDNESDAY NIGHT...CLEAR SKIES AND LIGHT WINDS WILL ALLOW TEMPERATURES TO DROP BELOW NORMAL. NORTHERN VALLEYS INCLUDING BROWN'S PARK...MAYBELL... CRAIG...HAYDEN...MILNER...STEAMBOAT...AND CLARK COULD GET A NIP OF FREEZING TEMPERATURES...THE FIRST FREEZE OF THE SEASON. FRIDAY THROUGH SUNDAY...A DRY WARMING TREND IS IN STORE AS HIGH PRESSURE AMPLIFIES OVER THE GREAT BASIN THEN PROGRESSES OVERHEAD BY SATURDAY. MODELS CONTINUE TO INDICATE SOME MARGINAL MOISTURE MAY WORK INTO THE SOUTHERN MTNS FOR A SLIGHT CHANCE OF A LIGHT LATE-DAY SHOWER FRIDAY THROUGH SUNDAY. MONDAY/LABOR DAY...STRONGER WINDS AND A CHANCE OF SHOWERS MAY TRY TO MESS WITH THE HOLIDAY. THE UPPER LEVEL RIDGE GETS PUSHED EAST AS A TROUGH OF LOW PRESSURE WORKS THROUGH THE NORTHERN ROCKIES. A BETTER SURGE OF SUBTROPICAL MOISTURE...BEST SEEN IN THE 325-330K ISENTROPIC LAYER...WORKS OVER THE FORECAST AREA ON MONDAY FOR OUR BEST CHANCE OF THUNDERSHOWERS. BUT MOST OF THIS MOISTURE GETS SHUNTED QUICKLY EAST OF THE CONTINENTAL DIVIDE FOR ONLY LOW CHANCES OF SHOWERS. MONDAY WILL BE BREEZY WITH 700-600MB WINDS AT 20KTS SOUTH TO 35KTS NORTH. MONDAY NIGHT-TUESDAY...THE ASSOCIATED COOL FRONT PASSES MONDAY NIGHT WITH DRIER COOLER AIR WORKING IN ON TUESDAY. THE MODELS ARE HINTING AT ANOTHER STRONGER PACIFIC TROUGH TO WORK ACROSS THE REGION LATE IN THE NEW WEEK. && .AVIATION... VFR WITH MECHANICAL TURBULENCE OVER THE MOUNTAINS BECOMING LESS EVIDENT. && .GJT WATCHES/WARNINGS/ADVISORIES... CO...NONE. UT...NONE. SHORT TERM.....CJC LONG TERM......JOE AVIATION.......PF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 600 AM MDT TUE AUG 31 2010 COZ001>014-017>023-UTZ022>025-027>029-011200- 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- 600 AM MDT TUE AUG 31 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT NO SIGNIFICANT WEATHER IS EXPECTED TODAY AND TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE WILL BE A SLIGHT CHANCE OF THUNDERSTORMS ACROSS THE SOUTH ON FRIDAY...OTHERWISE DRY WEATHER CAN BE EXPECTED THROUGH THE LABOR DAY WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT.
The national radar mosaic for the moment the first event began.
1 drought. Local standard time, as filed.
Moderate drought conditions decreased a little in coverage across Southeast Utah in September, though most of the area remained abnormally dry.
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, September 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: 347406.