Some improvement to the abnormally dry conditions were seen across the Four Corners region. Otherwise moderate drought to abnormally dry conditions persisted across portions of southwest Colorado near the continental divide.
Every event with a place to put it; 6 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.
Some improvement to the abnormally dry conditions were seen across the Four Corners region. Otherwise moderate drought to abnormally dry conditions persisted across portions of southwest Colorado near the continental divide.
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 Sep 30, 9:21 PM MST, 2 hours 39 minutes earlier.
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</html>HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 545 AM MDT FRI SEP 30 2011 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- 545 AM MDT FRI SEP 30 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL DEVELOP OVER THE SAN JUAN AND WEST ELK MOUNTAINS THIS AFTERNOON AND EVENING. THESE STORMS WILL BE HIGH BASED GENERATING STRONG OUTFLOW WINDS BUT LITTLE RAIN. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH EARLY NEXT WEEK... MAINLY DURING THE AFTERNOON AND EVENING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT. TGJT
The national radar mosaic for the moment the first event began.
6 drought. Local standard time, as filed.
Above normal and widespread precipitation generally erased drought conditions during the early part of October.
Abnormally dry conditions at the beginning of the month were erased by the middle of October due to above normal precipitation.
Abnormally dry conditions in the western portion of the area were erased by the middle of the month, while moderate drought conditions in the eastern portion of the area were eased to abnormally dry conditions by the same the middle of the month.
Abnormally dry conditions in some western areas were erased by the middle of the month, while areas of moderate drought conditions in the eastern portion of the area were eased to just abnormally dry conditions in most of that area by the same time period.
Abnormally dry conditions persisted across the extreme portion of the area.
Abnormally dry conditions persisted across the southeast corner of the area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2011Every state in 2011This day in weather historyWarnings in Colorado, October 2011
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: 357973, 357974, 357976, 357978, 357979, 357981.