A storm system brought moderate to heavy snow to the North-Central Mountains of Colorado. Snow amounts generally ranged from 6 to 12 inches, with heavier amounts along the eastern slopes of the Park and northern Gore Ranges.
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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 BOU wrote it up.
A storm system brought moderate to heavy snow to the North-Central Mountains of Colorado. Snow amounts generally ranged from 6 to 12 inches, with heavier amounts along the eastern slopes of the Park and northern Gore Ranges. Storm totals for specific locations included: 18 inches at Tower Snotel; 16 inches at Copper Mountain Ski Area; 12 inches at Jones Pass; 10.5 inches at Winter Park Ski Area; 10 inches at Roach Snotel; 9.5 inches at Columbine Snotel; 9 inches at Joe Wright; 8.5 inches at Michigan Creek Snotel; 8 inches at Summit Ranch.
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 Denver/Boulder, CO wrote its last area forecast discussion before the first event at Nov 30, 2:50 PM MST, 9 hours 10 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 250 PM MST FRI NOV 30 2007 .SHORT TERM...DEEP UPPER TROUGH TO MOVE INTO GREAT BASIN NEXT 24 HOURS...WITH SOUTHWEST FLOW ALOFT ACROSS CWA. LOTS OF MID AND HIGH LEVEL MOISTURE POISED TO MOVE INTO SOUTHWEST COLORADO...MODEL CROSS SECTIONS SHOW THE DEEPER MOISTURE ACROSS MOUNTAINS BY 06Z... CONTINING THROUGH SATURDAY. QG ASCENT INCREASES DURING EVENING AS LAPSE RATES BECOME FAVORABLE. DESPITE UNFAVORABLE OROGRAPHICS... SHOULD SEE SNOWFALL INCREASE IN COVERAGE OVER MOUNTAINS THIS EVENING. LOCAL SNOW MODEL YIELDS ADVISORY NUMBERS FOR MOUNTAINS THROUGH SATURDAY...WITH HIGHER AMOUNTS FOR ZONE 31. WILL CONTINUE SNOW AND BLOWING SNOW ADVISORY FOR HIGH COUNTRY. ACROSS PLAINS... FAIRLY STRONG SOUTHERLY GRADIENT TO DEVELOP THIS EVENING IN RESPONSE TO THE UPPER TROUGH MOVING INTO THE GREAT BASIN. LATEST FORECAST SOUNDINGS INDICATING LACK OF ANY UPSLOPE OVERNIGHT...SO PRECIPITATION CHANCES MINIMAL ALONG FRONT RANGE DUE TO SOUTHERLY DOWNSLOPE OFF PALMER DIVIDE. COULD SEE LOCAL CYCLONE DEVELOP SOMEWHERE ACROSS NORTHERN FRONT RANGE OVERNIGHT WHICH MAY BRING SOME LOW LEVEL MOISTURE TO AREAS NORTH OF DENVER BY DAYBREAK. SO...BEST CHANCE FOR PRECIP ALONG URBAN CORRIDOR SHOULD BE FROM FORT COLLINS NORTHWARD WHICH IS IN LINE WITH LATEST SREF GUIDANCE. FURTHER EAST...SOUTHERLY FLOW TO BRING WARM AIR ADVECTION WITH CROSS SECTIONS SUPPORTING FREEZING RAIN POTENTIAL FAR EASTERN PLAINS. BEST POTENTIAL LOOKING EAST OF A STERLING TO LIMON LINE BETWEEN 06Z AND 12Z. FREEZING RAIN ADVISORY FOR FAR EASTERN ZONES STILL SEEM ON TRACK...THOUGH MAY NEED TO BE EXTENDED IF DRIER AIR IS DELAYED. MODELS SHOW DESCENT ACROSS PLAINS DURING AFTERNOON AS FIRST WAVE SLIDES THROUGH. SURFACE WINDS INCREASE BEHIND WAVE...BUT LOOK TO STAY BELOW HIGH WIND CRITERIA. WILL INCREASE WIND GRIDS ACROSS PLAINS. .LONG TERM...SNOW SHOWERS WILL CONTINUE OVER THE MTNS SAT EVENING AS UPR TROF FINALLY MOVES ACRS THE DISTRICT. ARND 06Z SUNDAY MRNG...AXIS WL CROSS THE CNTRL MTNS AND WNDS ALF SHOULD SWITCH TO THE WEST AFTERWARD. PCPN MIGHT ACTUALLY INCRS FOR A BRIEF PERIOD OF TIME OVERNIGHT BEFORE TAPERING OFF SUNDAY MRNG. HWVR...MAIN WX SAT EVENING INTO SUNDAY FOR THE MTNS WL BE THE STG WINDS INVOF THE TROF AXIS. CROSS SECTIONS INDICATING WINDS UP TO 70 KTS ABV MTN TOP LVL. TOO MUCH INSTABILITY TO SEE A MTN WAV DVLP...BUT IT WL BE WINDY NEVERTHELESS IN THE MTNS/FTHILLS THROUGHOUT SUNDAY. ON THE PLAINS...COOL AND BREEZY CONDITIONS CAN BE EXPECTED. MUCH WARMER AND MORE TRANQUIL WX WL FOLLOW THIS SYSTEM NEXT WEEK. STG RDG PROGGED TO BLD INTO THE RGN BEGINNING MONDAY. LOTS OF SUN AND SOME LEE TROFG SHOULD ALLOW TEMPS TO RISE BACK INTO THE 60S ACRS THE FNT RANGE AND PLAINS. TROF FM WRN CANADA MAY REACH THE AREA LATER IN THE WEEK...BUT WL WAIT FOR BTR MDL CONSENSUS TO INCLD ANY POPS FOR THURS AND BEYOND. WL COOL TEMPS OFF A BIT FOR THE LATTER PERIODS. && .AVIATION...VFR CONDITIONS TO PREVAIL AT DIA THROUGH SATURDAY AS LOW LEVEL SOUTHERLY FLOW DEVELOPS. LOCAL MVFR CEILINGS POSSIBLE AFTER 06Z WITH PASSING LIGHT SNOW SHOWERS. NO SNOW ACCUMULATIONS EXPECTED. COULD SEE WEAK DENVER CYCLONE DEVELOP NORTH OF DIA BETWEEN 12Z AND 15Z SATURDAY WHICH COULD INCREASE CHANCE FOR MVFR CEILINGS. && .BOU WATCHES/WARNINGS/ADVISORIES... .SNOW AND BLOWING SNOW ADVISORY TONIGHT AND SATURDAY NORTHERN AND CENTRAL MOUNTAINS...ZONES 31..33 AND 34. .FREEZING RAIN ADVISORY LATE TONIGHT AND EARLY SATURDAY MORNING PORTIONS OF NORTHEAST PLAINS...ZONES 46>51. && D-L/046
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1029 AM MST FRI NOV 30 2007 COZ030>051-011300- JACKSON COUNTY BELOW 9000 FEET-WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/GILPIN/CLEAR CREEK/ SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY-LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY-NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/ EAST BROOMFIELD COUNTY-ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY-SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 1029 AM MST FRI NOV 30 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT A SLUG OF SUBTROPICAL MOISTURE WILL HEAD TOWARD THE AREA THIS AFTERNOON...RESULTING IN WIDESPREAD SNOW ACROSS THE HIGH COUNTRY BY THIS EVENING. UP TO 8 INCHES OF SNOW CAN BE EXPECTED OVERNIGHT... MAINLY WEST OF THE DIVIDE. STRONG WINDS OF 25 TO 35 MPH WILL ACCOMPANY THE SNOW...RESULTING IN WIDESPREAD BLOWING AND DRIFTING. MEANWHILE...ACROSS THE EASTERN PLAINS...SOME FREEZING RAIN WILL BE POSSIBLE. WHILE MOST OF THE ACCUMULATING FREEZING RAIN WILL OCCUR EAST OF THE DISTRICT...SOME FREEZING RAIN CAN BE EXPECTED EAST OF A STERLING TO AKRON TO LIMON LINE. THE FREEZING RAIN SHOULD CHANGE OVER TO SNOW BY DAYBREAK SATURDAY. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY WIDESPREAD SNOW WILL CONTINUE OVER THE HIGH COUNTRY...WITH ANOTHER 4 INCHES POSSIBLE BY SATURDAY EVENING. STRONG WINDS WILL CONTINUE TO CREATE AREAS OF BLOWING AND DRIFTING SNOW. THE SYSTEM RESPONSIBLE FOR THE INCLEMENT WEATHER WILL MOVE EAST MONDAY WITH WARMER AND DRIER WEATHER EXPECTED TUESDAY AND BEYOND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. DL/046
The national radar mosaic for the moment the first event began.
2 winter weather, 1 winter storm. Local standard time, as filed.
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, December 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: 63736, 63740, 63739.