A moist and stable air mass resulted in dense fog across the Eastern Uinta Basin.
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.
A moist and stable air mass resulted in dense fog across the Eastern Uinta Basin.
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 Dec 15, 4:03 AM MST, 3 hours 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 403 AM MST SAT DEC 15 2007 .SHORT TERM...TODAY THROUGH SUNDAY NIGHT... PATCHY FOG HAS DEVELOPED OVER MANY VALLEY LOCATIONS WITH COLD TEMPS...SNOW PACK AND STABLE AIRMASS. AREAS OF DENSE FOG AND FREEZING FOG ARE INDICATED BY OBS AND SATELLITE IN THE EASTERN UINTA BASIN THIS MORNING WITH VISIBILITIES AT OR BELOW A QUARTER MILE. ISSUED A DENSE FOG ADVISORY FOR THIS AREA UNTIL LATE MORNING WHEN THE DENSITY SHOULD DECREASE. SHORT WAVE RIDGE MOVES OVERHEAD TODAY. SLIGHT WARMING TREND IN THE MTNS LESS IN THE VALLEYS UNDER FAIRLY STABLE AIRMASS. A WEAK DISTURBANCE MOVES OVER THE NORTHERN TIER OF THE CWA THIS EVENING AS THE FLOW TRANSITIONS TO MORE NORTHWESTERLY. INCREASE POPS OVER THE NORTHERN MTNS...MAINLY ALONG THE DIVIDE AND THE FLAT TOPS. THE DISTURBANCE SLIDES THROUGH QUICKLY OVERNIGHT LIMITING SNOW ACCUMULATIONS WITH FAVORED NORTHWEST FACING SLOPES HAVING THE BEST CHANCES. SNOW SHOWERS SHOULD LINGER EARLY SUNDAY AND DISSIPATE DURING THE DAY WITH DRY CONDITIONS FOR SUNDAY NIGHT. TEMPERATURES WILL INCREASE ON SUNDAY AND SUNDAY NIGHT AS A WEAK NEG TILTED RIDGE TRACKS OVERHEAD. .LONG TERM (MONDAY THROUGH FRIDAY)... AS PER PREVIOUS DISCUSSION...MODELS IN GOOD AGREEMENT AND REMAINED SO IN THE LATEST RUNS. ALL SHOWED A ZONAL PATTERN WITH SOME WEAK RIPPLES BRINGING ISOLATED TO LOW END SCATTERED SNOW SHOWERS TO THE HIGHER TERRAIN OF THE NORTH MONDAY AND TUESDAY. STRONG WAVE STILL ON TRACK FOR WEDNESDAY AND TRENDED POPS TO JUST BELOW LIKELY FOR AREA MOUNTAINS TO ACCOUNT FOR POSSIBLE TIMING CHANGES IN FAST WESTERLY FLOW. TEMPERATURES WILL SLOWLY MODIFY EARLY IN THE WEEK...THOUGH FEEL MODEL GUIDANCE DOES NOT ADEQUATELY ACCOUNT FOR VALLEY SNOW COVER WHICH WILL BRING STRONG SURFACE INVERSIONS. THEREFORE...UNDERCUT MOS BY AROUND 5 DEG F WITH THE EXCEPTION OF THE SOUTH WHERE WARMER TEMPERATURES MORE LIKELY. THE ECMWF AND GFS SHOW ANOTHER WAVE FOR THE FRIDAY/SATURDAY TIME FRAME...THOUGH WITH SOME TIMING AND TRACK DIFFERENCES. THE ECMWF... IS ROUGHLY 24 HOURS FASTER THAN THE GFS WITH THE TROUGH ON TOP OF US BY FRI AFTERNOON. AND BOTH MODELS SUGGEST A SPLIT AS ENERGY DROPS SOUTH OF THE AREA. HAVE GONE CHANCE MOUNTAINS/SLIGHT CHANCE VALLEYS FOR NOW DUE TO THE HIGH DEGREE OF UNCERTAINTY. && AVIATION...IFR CONDITIONS EXPECTED IN VALLEYS THIS MORNING DUE TO AREAS OF FREEZING FOG...WITH POCKETS OF LIFR CONDITIONS. IN ADDITION...SOME MVFR CONDITIONS LIKELY DUE TO RESIDUAL CLOUDS AND ISOLATED SNOW SHOWERS ALONG THE CONTINENTAL DIVIDE. EXPECT VFR CONDITIONS ACROSS WESTERN MOST PORTIONS OF COLORADO AND MOST EASTERN UTAH. UINTA BASIN IN NORTHEAST UTAH WILL CONTINUE TO SEE WIDESPREAD LIFR CONDITIONS THIS MORNING IN FREEZING FOG. FOG WILL THIN IN THE AFTERNOON RESULTING IN MVFR CONDITIONS. && .GJT WATCHES/WARNINGS/ADVISORIES... .CO...NONE. .UT...DENSE FOG ADVISORY FOR UTZ 24 UNTIL 11 AM THIS MORNING. SHORT TERM.....AS LONG TERM......NL/ELH AVIATION.......NL
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 552 AM MST SAT DEC 15 2007 COZ001>014-017>023-UTZ022-023-025-027>029-161300- 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 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- 552 AM MST SAT DEC 15 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MOST OF EASTERN UTAH AND ALL OF WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT PATCHY VALLEY FOG WILL CONTINUE INTO LATE MORNING RESTRICTING VISIBILITIES TO LESS THAN A HALF MILE AT TIMES. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THERE IS A SLIGHT CHANCE OF SNOW SHOWERS OVER THE MOUNTAINS THROUGH TUESDAY...OTHERWISE DRY CONDITIONS ARE EXPECTED. THE CHANCE OF SNOW WILL INCREASE TUESDAY NIGHT AND WEDNESDAY...LINGERING INTO THURSDAY AS A STRONGER STORM SYSTEM MOVES INTO THE GREAT BASIN. THIS SYSTEM HAS THE POTENTIAL TO BRING LOCALLY HEAVY SNOWFALL TO THE MOUNTAINS OF WESTERN COLORADO AND EASTERN UTAH. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT. UTZ024-161300- EASTERN UINTA BASIN- 552 AM MST SAT DEC 15 2007 ...DENSE FOG ADVISORY FOR THE EASTERN UINTA BASIN UNTIL 11 AM... THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE EASTERN UINTA BASIN OF NORTHEAST UTAH. .DAY ONE...TODAY AND TONIGHT AREAS OF DENSE FOG AND FREEZING FOG WILL CONTINUE INTO LATE MORNING RESTRICTING VISIBILITY TO A QUARTER MILE OR LESS. FREEZING FOG CAN CAUSE ROADWAYS...SIDEWALKS AND ESPECIALLY BRIDGES TO BECOME SLICK WITH A LIGHT GLAZE OF ICE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THERE IS A SLIGHT CHANCE OF SNOW SHOWERS OVER THE MOUNTAINS THROUGH TUESDAY...OTHERWISE DRY CONDITIONS ARE EXPECTED. THE CHANCE OF SNOW WILL INCREASE TUESDAY NIGHT AND WEDNESDAY...LINGERING INTO THURSDAY AS A STRONGER STORM SYSTEM MOVES INTO THE GREAT BASIN. THIS SYSTEM HAS THE POTENTIAL TO BRING LOCALLY HEAVY SNOWFALL TO THE MOUNTAINS OF WESTERN COLORADO AND EASTERN UTAH. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT. TGJT
The national radar mosaic for the moment the first event began.
1 dense fog. Local standard time, as filed.
Visibility was reduced to 1/4 mile in fog.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2007Every state in 2007This day in weather historyWarnings in Utah, 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: 67624.