Improvement in the drought conditions occurred across western Colorado as a series of Pacific storm systems brought substantial rainfall to the area. Drought conditions receded across the area leaving abnormally dry to moderate drought confined to the far northwest portion of Colorado by the end of the month.
Every event with a place to put it; 16 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.
Improvement in the drought conditions occurred across western Colorado as a series of Pacific storm systems brought substantial rainfall to the area. Drought conditions receded across the area leaving abnormally dry to moderate drought confined to the far northwest portion of Colorado by the end of the month.
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, 1:49 PM MST, 10 hours 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 249 PM MDT FRI AUG 31 2007 .SHORT TERM (TONIGHT THROUGH SUNDAY)... A SHORTWAVE TROUGH WILL CONTINUE MOVING THROUGH THE RIDGE AND OVER THE AREA TONIGHT. AT MIDAFTERNOON THE TROUGH LINE EXTENDED FROM SW MONTANA THROUGH WESTERN WY AND THEN SOUTH ALONG THE CO/UT BORDER. THE STRONGERS VORT MAX AND VERTICAL MOTION WERE WAS OVER MT AND WY WITH THE WEAKER TAIL OF THE FEATURE EXTENDING FURTHER SOUTH. AS THIS TROUGH MOVE NORTHEAST...IT WILL FLATTEN THE LARGE RIDGE THAT COVERS THE SWRN U.S. AND THE CENTRAL PLAINS STATES. THIS WILL BRING DRIER AIR INTO THE AREA FROM NORTHWEST TO SOUTHEAST. THE TROUGHLINE WILL SETTLE OVER THE SAN JUAN MOUNTAINS SATURDAY...BEING NEARLY STATIONARY THROUGH SUNDAY. HAVE ADJUSTED THUNDERSTORM COVERAGE HIGHER FOR TONIGHT AND EMPHASIZED SW CO SAT AND SUN. WITH CLEARER SKIES EXPECTED BOTH NIGHT...HAVE LOWERED OVERNIGHT LOW TEMPS BOTH NIGHTS. MAX TEMPS WILL BE RELATIVELY STATIC. .LONG TERM...(SUNDAY NIGHT THROUGH THURSDAY)... UPPER LEVEL RIDGE REMAINS ANCHORED OVER THE REGION DURING THE EARLY PART OF THE PERIOD WITH THE HIGH CENTER POSITIONED TO OUR SOUTHWEST. THEN PACIFIC ENERGY WILL PUSH ONSHORE EARLY TUESDAY OVER THE NORTHWEST AND PROCEED EASTWARD. THIS WILL RESULT IN A PATTERN CHANGE BY MIDWEEK OVER THE FORECAST AREA. THE FORECAST THROUGH TUESDAY WILL FOLLOW THE PERSISTENT LOW-GRADE DIURNAL POPS...MAINLY MOUNTAINS...AS SOME MID LEVEL MOISTURE CONTINUES TO ROTATE AROUND THE HIGH CENTER. TEMPERATURES WILL REMAIN A LITTLE ABOVE NORMAL AS THERE WILL BE PLENTY OF SUNSHINE EARLY EACH DAY...AND ENOUGH MOISTURE AT NIGHT TO KEEP LOWS FROM DROPPING BELOW NORMAL. THEN BY WED...THE PACIFIC TROUGH IS PROGGED TO MOVE ACROSS THE GREAT BASIN...AND REACH THE CENTRAL ROCKIES. MODELS ARE SHOWING BETTER CONSISTENCY THAN PREVIOUS RUNS. THE GFS HAS TRENDED TOWARDS THE FASTER ECMWF TIMING. AND THE 12Z EC SOLUTION BRINGS THE TROUGH A LITTLE FARTHER SOUTH...MORE IN LINE WITH THE GFS. I HAVE TENDED TO BROAD BRUSH THE FORECAST AS THE AMOUNT OF AVAILABLE MOISTURE STILL IN QUESTION. WITH THE BEST TIMING NOW ON WED I HAVE UPPED POPS A LITTLE...AND LOWERED TEMPS. THEN ON THU-FRI BACKED OFF POPS A TAD EACH DAY AS WESTERLY FLOW BEHIND THE TROUGH RESULTS IN A DRIER REGIME. THU WILL BE THE COOLEST DAY BEHIND THE TROUGHS ASSOCIATED COLD FRONT. && .AVIATION... EXPECT AREAS OF MVR CONDITIONS IN AND NEAR SCATTERED MOUNTAIN THUNDERSTORMS AND ISOLATED VALLEY STORMS THROUGH LATE EVENING. GUSTY OUTFLOW WINDS AND SMALL HAIL WILL BE COMMON WITH LOCAL GUSTS REACHING 35 KNOTS. THUNDERSTORMS WILL DECREASE FROM THE WEST LATE TONIGHT. && .GJT WATCHES/WARNINGS/ADVISORIES... .CO...NONE. .UT...NONE. SHORT TERM...CJC LONG TERM...EH AVIATION...CJC
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 600 AM MDT FRI AUG 31 2007 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 FRI AUG 31 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS DEVELOPING TODAY WILL GENERATE GUSTY WINDS THIS AFTERNOON WITH THE STRONGEST GUSTS TO 40 MPH. LOCAL BLOWING DUST WILL BE POSSIBLE IN SOME DESERT AREAS. SCATTERED THUNDERSTORMS WILL DECREASE FROM THE WEST TONIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY LESS THUNDERSTORM ACTIVITY EXPECTED ON SATURDAY WITH THE BEST CHANCE OF STORMS OVER SOUTHWEST COLORADO. SUNDAY THROUGH THURSDAY...THERE WILL BE A SLIGHT CHANCE OF AFTERNOON THUNDERSTORMS EACH DAY IN THE MOUNTAINS. A COLD FRONT WILL BRING COOLER CONDITIONS ON WEDNESDAY AND THURSDAY. EXPECT A VERY COOL AND CRISP MORNING IN THE MOUNTAIN VALLEYS ON THURSDAY MORNING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT.
The national radar mosaic for the moment the first event began.
16 drought. Local standard time, as filed.
Abnormally dry to moderate drought continued across the area. Improvement did occur as the moderate drought area receded to extreme northwest Moffat County.
Abnormally dry conditions plagued much of the area through the month. However, improvement did occur as moderate drought diminished across the area.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the abnormally dry conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the moderate drought conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the abnormally dry conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the abnormally dry conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the moderate drought conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the abnormally dry conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the abnormally dry conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the abnormally dry conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the abnormally dry conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the abnormally dry conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the abnormally dry conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the abnormally dry conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the abnormally dry conditions which had been persisting across the area diminished.
Significant precipitation occurred across the area due to a number of autumn storm systems. As a result, the abnormally dry conditions which had been persisting across the area diminished.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2007Every state in 2007This day in weather historyWarnings in Colorado, September 2007
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: 59884, 59885, 59964, 59965, 59966, 59967, 59968, 59969, 59970, 59971, 59972, 59973, 59974, 59975, 59976, 59978.