A moist Pacific system moved across Utah over a four-day period. Areas of heavy snow occurred in the higher terrain the night of the 6th through the 8th.
Every event with a place to put it. 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 SLC wrote it up.
A moist Pacific system moved across Utah over a four-day period. Areas of heavy snow occurred in the higher terrain the night of the 6th through the 8th. In the northern valleys, rain changed to snow on the 7th and continued through the early morning hours of the 9th. Heavy rain also occurred in the lower elevations of southern Utah.
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 Salt Lake City, UT wrote its last area forecast discussion before the first event at Dec 6, 9:25 AM MST, 6 hours 35 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
925 AM MST THU DEC 6 2007
.SYNOPSIS...A MOIST PACIFIC STORM SYSTEM WILL SLOWLY CROSS THE GREAT
BASIN THIS AFTERNOON THROUGH SATURDAY. A COLD NORTHERLY FLOW
WILL FOLLOW THIS SYSTEM SUNDAY THROUGH EARLY NEXT WEEK.
&&
.DISCUSSION...COMPLEX AND LONG DURATION PRECIPITATION EVENT
SETTING UP FOR THE ENTIRE CWA TODAY INTO SUNDAY. MOSTLY CLOUDY TO
CLOUDY SKIES REGION-WIDE THIS MORNING. PRECIPITATION IS VERY
ISOLATED AT THIS TIME...BUT THIS SHOULD CHANGE AS WARM AIR
ADVECTION PRECIPITATION DEVELOPS THIS AFTERNOON. NO UPDATES NEEDED
AS CURRENT FORECAST IS ON TRACK.
CURRENT HEADLINES INCLUDE HEAVY SNOW WARNINGS FOR MOUNTAIN
ZONES AND VALLEYS/UINTA BASIN/UINTA COUNTY WYOMING AS WELL AS A
FLASH FLOOD WATCH FOR SOUTHWESTERN UTAH ARE CONSISTENT WITH
INITIAL IMPRESSION OF THE 12Z NAM AND OLDER RUNS OF THE GLOBAL
MODELS. WILL HOLD OFF ON ANY DECISIONS REGARDING ADDITIONAL HEADLINES
FOR THE WESTERN VALLEYS UNTIL 12Z GLOBAL MODELS ARE IN.
UPPER LEVEL TROUGH WILL CONTINUE TO DEVELOP THIS AFTERNOON AS IT
MOVES ONSHORE ACROSS THE PACIFIC NORTHWEST. WARM AIR ADVECTION
AHEAD OF THE TROUGH WILL BRING DECENT PRECIPITATION AMOUNTS TO
MANY LOCATIONS THROUGH TONIGHT. AS THE TROUGH DIGS INTO THE
WESTERN GREAT BASIN ON FRIDAY...A SURFACE LOW WILL LIKELY DEVELOP
IN SOUTHERN NEVADA. EXACT LOCATION AND TRACK OF THIS LOW IS HARD
TO DISCERN AT THIS TIME GIVEN THE DIVERGENCE OF MODEL SOLUTIONS.
12Z NAM INDICATES THIS LOW WOULD TRACK FROM NEAR KINGS CANYON
FRIDAY EVENING TO NEAR PROVO BY SATURDAY MORNING. A HEAVY BAND OF
PRECIPITATION IS FORECAST IN THE NORTHWEST QUADRANT OF THIS LOW BY
BOTH THE GFS/NAM. BASED ON PRELIMINARY LOOK AT NAM BUFR DATA...SNOW
LEVELS WILL BE NEAR THE VALLEY FLOORS AFTER MIDNIGHT IN MOST
LOCATIONS. WHEREVER THIS HEAVY SNOW BANDS SETS UP WILL HAVE THE
POTENTIAL FOR ENHANCED SNOWFALL ACCUMULATIONS. AS MENTIONED
EARLIER...WILL WAIT FOR THE 12Z GLOBAL MODELS WHICH ARE JUST
TRICKLING IN BEFORE MAKING ANY DECISIONS FOR POSSIBLE HEADLINES
INCLUDING THE WASATCH FRONT.
&&
.HYDROLOGY...HEAVY RAINS WILL LIKELY GENERATE FLASH FLOODING IN SLOT
CANYONS AND SLICK ROCK DRAINAGES FROM WASHINGTON COUNTY EASTWARD
TO LAKE POWELL. PRECIP AT HIGHER ELEVATIONS IN THE LARGER
DRAINAGES WILL LIKELY BE SNOW SO LARGE SCALE FLOODING IS NOT
EXPECTED. THE THREAT OF THIS WILL DECREASE AS COLDER AIR SPREADS
IN LATE FRIDAY.
&&
.AVIATION...CEILINGS ARE EXPECTED TO LOWER LATE THIS MORNING AND
FALL BELOW 7000 FT AGL AFTER 21Z. VISIBILITIES WILL REMAIN VFR.
SOUTHEAST WINDS WILL PREVAIL TODAY. LIGHT RAIN IS EXPECTED AFTER
21Z...AND THE RAIN COULD BE HEAVY AT TIMES TONIGHT. WITH THE
SURFACE LOW DEEPENING THIS EVENING TO YOUR SOUTHWEST THERE A 40
PERCENT CHANCE OF WINDS BECOMING NORTHERLY AT THE SURFACE 01Z TO
10Z BUT WILL REMAIN MODERATELY SOUTHWEST ALOFT. RAIN COULD BE
HEAVY AT TIMES TONIGHT AND PRODUCE MVFR VISIBILITIES AND CEILINGS
AT TIMES.
&&
.SLC WATCHES/WARNINGS/ADVISORIES...
UT...HEAVY SNOW WARNING FROM NOON THURSDAY TO 6 PM SATURDAY FOR
UTZ517-UTZ518.
HEAVY SNOW WARNING FROM 3 PM THURSDAY TO 6 PM SATURDAY FOR
UTZ006-UTZ008-UTZ009-UTZ010.
HEAVY SNOW WARNING FROM 6 PM THURSDAY TO 6 PM SATURDAY FOR
UTZ007.
HEAVY SNOW WARNING FROM 3 PM THURSDAY TO 9 AM SATURDAY FOR
UTZ011-UTZ012.
FLASH FLOOD WATCH FROM 3 PM THURSDAY TO 7 PM FRIDAY FOR UTZ019-
UTZ020-UTZ021.
WY...HEAVY SNOW WARNING FROM 6 PM THURSDAY TO 6 PM SATURDAY FOR
WYZ021.
&&
PUBLIC...CSMITH
AVIATION...TARDY
FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 558 AM MST THU DEC 6 2007 UTZ001>016-019>021-517-518-WYZ021-071300- CACHE VALLEY/UTAH PORTION-NORTHERN WASATCH FRONT- SALT LAKE AND TOOELE VALLEYS-SOUTHERN WASATCH FRONT- GREAT SALT LAKE DESERT AND MOUNTAINS-WASATCH MOUNTAIN VALLEYS- WASATCH MOUNTAINS I-80 NORTH-WASATCH MOUNTAINS SOUTH OF I-80- WESTERN UINTA MOUNTAINS-WASATCH PLATEAU/BOOK CLIFFS- WESTERN UINTA BASIN-CASTLE COUNTRY-SAN RAFAEL SWELL- SANPETE/SEVIER VALLEYS-WEST CENTRAL UTAH-SOUTHWEST UTAH- UTAHS DIXIE AND ZION NATIONAL PARK-SOUTH CENTRAL UTAH- GLEN CANYON RECREATION AREA/LAKE POWELL-CENTRAL MOUNTAINS- SOUTHERN MOUNTAINS-SOUTHWEST WYOMING- 558 AM MST THU DEC 6 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF UTAH AND SOUTHWEST WYOMING. .DAY ONE...TODAY AND TONIGHT MOISTURE ASSOCIATED WITH AN APPROACHING PACIFIC STORM SYSTEM WILL SPREAD ACROSS THE REGION TODAY. PRECIPITATION IS EXPECTED TO BREAK OUT ACROSS PORTIONS OF THE OUTLOOK AREA THIS AFTERNOON...THEN INCREASE IN COVERAGE AND INTENSITY TONIGHT. SNOW IS EXPECTED ACROSS THE HIGHER TERRAIN WITH RAIN EXPECTED ACROSS LOWER ELEVATIONS THROUGH TONIGHT. SEE THE LATEST WINTER WEATHER STATEMENTS FOR ADDITIONAL INFORMATION. HEAVY RUNOFF FROM EXCESSIVE RAINFALL WILL ALSO BE POSSIBLE ACROSS FAR SOUTHERN UTAH...WHERE A FLASH FLOOD WATCH IS IN EFFECT FROM THIS AFTERNOON THROUGH FRIDAY. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE PACIFIC STORM SYSTEM WILL SPREAD ACROSS THE REGION FRIDAY THROUGH SATURDAY...BRINGING WIDESPREAD SNOWFALL TO THE HIGHER TERRAIN. SNOW LEVELS ARE EXPECTED TO FALL TO THE VALLEY FLOORS BY FRIDAY NIGHT WITH ACCUMULATIONS LIKELY ACROSS MANY LOCATIONS. BE SURE TO MONITOR LATER FORECASTS AND OUTLOOKS FOR ADDITIONAL INFORMATION ON THIS PENDING WINTER STORM. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
The Cedar City radar (KICX), 33 km away, was scanning. The volume nearest the first event began at 14:59 UTC.
14 heavy snow, 1 flash flood. Local standard time, as filed.
Brighton Crest and Sundance received 20 inches of snow in 24 hours. For the total storm, Brighton Crest received 47 inches of snow, and Sundance received a snow-water equivalent of 4.52 inches.
Snyderville received 12 inches of snow in 15 hours. Coalville received 8 inches during the same period, as well as 14 inches storm total.
Roosevelt received 7 inches of snow in 12 hours and 9 inches storm total.
Ferron received 6 inches of snow in 12 hours and 8 inches storm total.
Ben Lomond Peak received 2.00 inches of snow-water equivalent, or about 18 inches of snow, in 24 hours. Snowbasin also received 14 inches during this time period. For the storm total, Ben Lomond Peak received 2.80 inches water, and Snowbasin received 22 inches of snow.
Indian Canyon SNOTEL received 1.00 inch snow-water equivalent, or about 12 inches of snow, in 12 hours. For the storm total, this SNOTEL received 1.90 inches snow-water equivalent.
Vernon Creek SNOTEL received 18 inches of snow in 24 hours.
Bountiful and North Salt Lake received 8 to 10 inches of snow in 12 hours.
Salt Lake City Airport received 6.1 inches of snow in 12 hours and 9 inches storm total.
Pleasant Grove and Alpine received 7 inches of snow in 12 hours.
Mammoth Cottonwood SNOTEL received 12 inches of snow in 12 hours.
Kolob Cedar Breaks SNOTEL received 12 inches of snow in 12 hours.
Widespread flash flooding occurred in the headwaters of the North Fork of the Virgin River throughout Zion National Park.
Areas of western Millard and Juab counties were estimated to have received 6 inches of snow in 12 hours; this was based on regional observations and satellite imagery in this data-sparse area.
Salina received 14 inches storm total, most of which fell in a 10-hour period on December 8th.
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: 68305, 68304, 68307, 68309, 68310, 68306, 68315, 68311, 68312, 68313, 68301, 68303, 68330, 68318, 68316.