The drought conditions remained nearly unchanged through the month of November. Abnormally dry conditions persisted across most of southwest and west central Colorado, with moderate drought conditions present over extreme southwest Colorado.
Every event with a place to put it; 18 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.
The drought conditions remained nearly unchanged through the month of November. Abnormally dry conditions persisted across most of southwest and west central Colorado, with moderate drought conditions present over extreme southwest Colorado. Throughout the month, both the areas of abnormally dry conditions as well as moderate drought conditions spread ever so slightly northward.
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 Oct 31, 1:24 PM MST, 10 hours 36 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 224 PM MDT SAT OCT 31 2009 .SHORT TERM...TONIGHT THROUGH MONDAY... ANTICYCLONIC FLOW WILL BECOME MORE ZONAL THIS EVENING AS JET STREAM STAYS OVER WY. AS A RESULT...CLEAR TO MOSTLY CLEAR SKIES TONIGHT WITH COLD TEMPERATURES ONCE AGAIN...BE SURE TO BUNDLE UP THE KIDS FOR TONIGHT/S CANDY FESTIVITIES. WEST TO EAST ORIENTED JET STREAM WILL SET UP FOR AREAS NORTH LEAVING OUR CWA REASONABLY CALM OVER NEXT FEW DAYS. MODELS DO HIGHLIGHT SOME VORT MAXES MOVING THRU MEAN FLOW BUT WITH VERY LITTLE MOISTURE TO PLAY WITH...NO WX EXPECTED ASIDE FROM SOME CLOUDS ESPECIALLY FOR AREAS NEAR AND AROUND WY BORDER. ...DAYLIGHT SAVINGS ENDS 2AM SUNDAY...DON/T FORGET TO SET YOUR CLOCK 1 HOUR BACK BEFORE GOING TO BED TONIGHT... BY SUNDAY...JET WILL DROP SLIGHTLY SOUTHWARD. ONLY REFLECTION FOR OUR AREA WILL BE INCREASE IN CLOUD COVER FOR NORTHERN AREAS AS UPPER DYNAMICS WILL STAY WELL TO OUR N FOR ANY PRECIP. REMAINING AREAS WILL SEE ANOTHER DAY OF SUNNY SKIES AND WARMING TEMPS. SUNDAY NIGHT/MONDAY...MODELS CONTINUE TO HIGHLIGHT DISTURBANCES MOVING TO OUR N BUT AS JET MOVES SLOWLY SWRD...CHANCES INC FOR SNOW SHOWERS. INCLUDED SCHC SNOW FOR NRN MTNS DUE TO FAVORABLE OROGRAPHIC FLOW...THOUGH UPPER LEVEL SUPPORT DOES APPEAR WEAK ATTM. REMAINDER OF CWA WILL EXPERIENCE CLEAR TO PARTLY CLOUDY SKIES WITH NO PRECIP. WARM ADVECTION WILL PERSIST THROUGHOUT ENTIRE SHORT-TERM AND BRING TEMPS TO MORE CLIMATOLOGICAL NORMALS BY MONDAY. .LONG TERM...MONDAY NIGHT THROUGH SATURDAY... RATHER BENIGN PERIOD SHAPING UP WITH HIGH PRESSURE CENTERED OFF THE WEST COAST PROVIDING DRY NW FLOW THROUGH AT LEAST MIDWEEK. WEAK EMBEDDED DISTURBANCES WILL ZIP BY MON-WED FOR SOME INCREASED CLOUDINESS AT TIMES MAINLY ACROSS THE NORTH. 12Z ECWMF SHOWS A BIT MORE AMPLITUDE IN THE FLOW AFTER WEDNESDAY...WITH A LITTLE MORE SUBSTANTIVE SHORTWAVE DROPPING ACROSS ON THU. GFS IS FLATTER BUT ALSO SHOWS A SHORTWAVE CROSSING. LIMITED MOISTURE IN BOTH SHOULD KEEP CHANCES OF PRECIP MINIMAL. 12Z ECWMF SHOWS ANOTHER WAVE DIGGING INTO THE PAC NW AND NRN ROCKIES BY NEXT SAT WHILE GFS MAINTAINS A FLATTER FLOW THAT KEEPS SHORTWAVE ENERGY FARTHER N. WILL KEEP THE DRY FORECAST HEADING INTO NEXT WEEKEND FOR NOW. TEMPS MODERATE MON-WED AND THEN LEVEL OFF. && .AVIATION... VFR CONDITIONS EXPECTED FOR THE NEXT 24 HOURS. && .GJT WATCHES/WARNINGS/ADVISORIES... CO...NONE. UT...NONE. SHORT TERM.....TGR LONG TERM......JAD AVIATION.......TGR
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 253 PM MDT SAT OCT 31 2009 COZ001>014-017>023-UTZ022>025-027>029-012054- 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- 253 PM MDT SAT OCT 31 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT.
The national radar mosaic for the moment the first event began.
18 drought. Local standard time, as filed.
Moderate drought conditions persisted across the area.
Moderate drought conditions persisted across the area.
Abnormally dry conditions persisted across the western half of Archuleta county, with moderate drought conditions over extreme western Archuleta county.
Abnormally dry conditions persisted across all but the southeast portions of the area, with moderate drought conditions over western portions of the area.
Abnormally dry conditions persisted across most of the area, with moderate drought conditions over far western portions of the area.
Abnormally dry conditions persisted across most of the area, with moderate drought conditions expanding northward into western Montrose county.
Abnormally dry conditions persisted across the area.
Abnormally dry conditions persisted across the area.
Abnormally dry conditions persisted across the area.
Abnormally dry conditions persisted across the area.
Abnormally dry conditions persisted across the area.
Abnormally dry conditions persisted across the area.
Abnormally dry conditions persisted across the area.
Abnormally dry conditions persisted across the area.
Abnormally dry conditions persisted across all but extreme northwestern Eagle county.
Abnormally dry conditions spread northward encompassing the whole area by the end of the month.
Abnormally dry conditions spread northward covering southern portions of the area by the end of the month.
Abnormally dry conditions spread northward covering southern portions of the area by the end of the month.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2009Every state in 2009This day in weather historyWarnings in Colorado, November 2009
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: 198441, 198442, 198444, 198445, 198446, 198447, 198448, 198449, 198450, 198451, 198452, 198453, 198454, 198455, 198456, 198457, 198458, 198459.