Subtropical moisture moved into Utah on November 30th ahead of a Pacific storm system that moved through the state November 30th into December 1st. This produced widespread snow across central and northern Utah, as well as heavy rain in southern Utah on the morning of December 1st.
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.
Subtropical moisture moved into Utah on November 30th ahead of a Pacific storm system that moved through the state November 30th into December 1st. This produced widespread snow across central and northern Utah, as well as heavy rain in southern Utah on the morning of December 1st. Note that this episode continued into December 2007.
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 Nov 30, 10:55 AM MST, 5 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1055 AM MST FRI NOV 30 2007
.SYNOPSIS...SUBTROPICAL MOISTURE WILL SURGE NORTH INTO UTAH AHEAD
OF A PACIFIC STORM SYSTEM TODAY. WIDESPREAD PRECIPITATION WILL
ACCOMPANY THIS PACIFIC STORM THROUGH SATURDAY. HIGH PRESSURE ALOFT
WILL BRING DRY AND MILD CONDITIONS TO THE AREA EARLY NEXT WEEK.
&&
.DISCUSSION...UPPER LOW OFF THE BAJA COAST THIS MORNING WILL OPEN UP
AND LIFT NORTHEAST ACROSS ARIZONA AND SOUTHEAST UTAH THROUGH
TOMORROW MORNING. ABUNDANT SUBTROPICAL MOISTURE WILL SURGE INTO
SOUTHERN AND CENTRAL UTAH TODAY AHEAD OF THE SYSTEM. ALTHOUGH
DEWPOINTS ARE STILL FAIRLY LOW OVER SOUTHERN UTAH THIS MORNING...A
STRONG DEWPOINT GRADIENT IS EVIDENT INTO ARIZONA AND EXTREME
SOUTHERN CALIFORNIA. A FEW LIGHT SHOWERS HAVE ALREADY DEVELOPED
ACROSS PORTIONS OF SOUTHERN AND CENTRAL UTAH...BUT THESE ARE NOT
EXPECTED TO AMOUNT TO MUCH UNTIL THE AFTERNOON WHEN DEEPER MOISTURE
ARRIVES...AND ESPECIALLY TONIGHT AHEAD OF THE APPROACHING TROUGH. A
FAIRLY WARM AIRMASS MAY KEEP SNOW LIMITED TO THE HIGHER PEAKS ACROSS
SOUTHERN UTAH TODAY...WITH THE SNOW LEVEL LOWERING OVERNIGHT.
FARTHER NORTH...SNOW LEVELS MAY BE A BIT LOWER THIS AFTERNOON DUE TO
COOLER AIR IN PLACE. A SHORTWAVE DISTURBANCE WILL SLIDE ACROSS
NORTHERN UTAH TONIGHT...BUT IT IS ASSOCIATED WITH A STRONG UPPER JET
WHICH CLIPS NORTHWEST UTAH. A SECOND TROUGH THEN SLIDES ACROSS THE
AREA TOMORROW AFTERNOON AND EVENING...SPREADING COOLER AIR ACROSS
UTAH. THE MOISTURE SHIFTS EAST OF THE AREA AND PRECIPITATION
DECREASES FOR TOMORROW NIGHT.
ONE FORECAST ISSUE FOR TODAY WILL BE HOW FAR NORTH THE MOISTURE WILL
SURGE. MODELS SUGGEST THAT THE MOST SIGNIFICANT PRECIPITATION WILL
SPREAD INTO WEST CENTRAL UTAH AND THE UINTAS WITH THE NORTHWESTERN
EXTENT OF ANY PRECIPITATION BEING ALONG A WENDOVER TO LOGAN LINE.
THE HIGHER ELEVATION AREAS ACROSS SOUTHERN AND CENTRAL UTAH SHOULD
HAVE NO PROBLEMS SEEING ACCUMULATING SNOWFALL...WITH THE HEAVIEST
SNOW GENERALLY OCCURRING ALONG AREAS FAVORED BY SOUTHWEST FLOW. THE
FAR NORTHERN MOUNTAINS ARE NOT EXPECTED TO SEE SIGNIFICANT SNOWFALL
DUE TO A LACK OF MOISTURE THAT FAR NORTH. THE CENTRAL AND SOUTHERN
WASATCH FRONT AND MOUNTAINS COULD SEE SOME ENHANCEMENT IN
PRECIPITATION DUE TO SYNOPTIC LIFT INTERACTING WITH THE MOISTURE AS
THE JET STRENGTHENS OVER THE AREA LATER THIS EVENING.
ANOTHER FORECAST ISSUE WILL BE PRECIP AMOUNTS. CERTAINLY THIS WILL
IMPACT THE SNOW AMOUNT FORECAST...BUT MORE IMPORTANTLY...THIS COULD
RESULT IN HYDROLOGIC CONCERNS. WITH SNOW LEVELS RELATIVELY
HIGH...SOUTHERN UTAH VALLEYS WILL SEE ABUNDANT RAINFALL. THE 12Z NAM
STORM-TOTAL QPF OF OVER 4 INCHES ACROSS PORTIONS OF SOUTHWEST
UTAH...UP TO 2 INCHES ELSEWHERE ACROSS SOUTHERN UTAH
VALLEYS...INDICATE THE THREAT OF FLASH FLOODING OR PERHAPS EVEN
AREAS OF MAIN STEM RIVER FLOODING. ALTHOUGH THE GFS QPF IS LOWER
THAN THE NAM...AREAS OF GREATER THAN 2 INCHES OF STORM TOTAL
PRECIPITATION ALSO EXIST. FLASH FLOOD WATCH IN EFFECT FOR EXTREME
SOUTHERN ZONES LOOK GOOD...BUT MAY HAVE TO CONSIDER INCLUDING ZONE
13 BY THE AFTERNOON PACKAGE. WITH THE HIGH QPF...HIGHER PEAKS IN
SOUTHERN AND CENTRAL MOUNTAINS ARE EXPECTED TO SEE WARNING AMOUNTS.
SNOW ADVISORIES ARE IN EFFECT FOR ZONES 8 THROUGH 10 AS WELL AS
HIGHER VALLEYS. WILL HAVE TO DECIDE IF SOME OF THESE ZONES MAY NEED
TO BE BUMPED UP TO A WARNING AND WHETHER THE WESTERN UINTA BASIN
ALSO NEEDS A SNOW HEADLINE.
WILL MAKE A FEW MINOR TWEAKS TO THE ZONES...OTHERWISE NO SIGNIFICANT
UPDATES THIS MORNING.
&&
.HYDROLOGY...SIGNIFICANT MOISTURE SURGING INTO THE AREA TODAY AND
TONIGHT WILL RESULT IN HEAVY RAINFALL ACROSS PORTIONS OF SOUTHERN
UTAH. THE HEAVIEST RAINFALL IS EXPECTED TO OCCUR LATE TONIGHT
THROUGH LATE TOMORROW MORNING. MOST OF THE FLASH FLOODING PROBLEMS
WILL BE CONFINED TO THE SLICK ROCK/SLOT CANYON COUNTRY OF THE
EXTREME SOUTH. THE RECENT DRY SPELL WILL ALLOW PERMEABLE SOIL TO
TAKE IN THE PRECIP. THE SLICK ROCK AREAS WILL LIKELY BE OVERWHELMED
BY THE VOLUME OF RUNOFF...AND COULD EASILY RESULT IN FLASH FLOODING.
A FLASH FLOOD WATCH IS IN EFFECT FOR EXTREME SOUTHERN UTAH FOR THIS
EVENING AND INTO TOMORROW MORNING.
&&
.AVIATION...PREDOMINANT NORTH WIND EXPECTED AT KSLC THROUGH THE DAY
TODAY AS COLD FRONT SETS UP JUST TO THE SOUTH OF THE TERMINAL.
HOWEVER THERE IS A 30 PERCENT CHANCE THIS FRONT WILL MOVE NORTH OF
THE TERMINAL THIS AFTERNOON ALLOWING WINDS TO BECOME SOUTHERLY.
OTHERWISE CEILINGS ARE EXPECTED TO FALL BELOW 7KFT AROUND 00Z THIS
EVENING. A 30 PERCENT CHANCE FOR RAIN SHOWERS EXISTS BETWEEN 00Z AND
06Z...WITH PRECIPITATION AND MVFR CONDITIONS LIKELY AFTER THIS TIME.
RAIN IS EXPECTED TO CHANGE OVER TO SNOW AFTER 10Z TONIGHT WITH
LITTLE IF ANY ACCUMULATION ON RUNWAYS.
&&
.SLC WATCHES/WARNINGS/ADVISORIES...
UT...WINTER STORM WARNING FRIDAY BEGINNING 2 PM MST THROUGH
SATURDAY FOR THE SOUTHERN AND CENTRAL MOUNTAINS UTZ517-518.
SNOW ADVISORY WASATCH PLATEAU/BOOK CLIFFS AND THE WESTERN UINTA
MOUNTAINS BEGINNING 2 PM MST THIS AFTERNOON THROUGH SATURDAY
UTZ009-010.
SNOW ADVISORY FOR THE WASATCH MOUNTAIN VALLEYS AND THE CASTLE
COUNTRY AREA AROUND PRICE BEGINNING AT 5 PM THIS AFTERNOON
THROUGH SATURDAY MORNING UTZ006-012.
WY...NONE.
&&
CHENG/SEAMAN
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 630 AM MST FRI NOV 30 2007 UTZ012>014-016-019>021-517-518-011330- CASTLE COUNTRY-SAN RAFAEL SWELL-SANPETE/SEVIER VALLEYS- SOUTHWEST UTAH-UTAHS DIXIE AND ZION NATIONAL PARK- SOUTH CENTRAL UTAH-GLEN CANYON RECREATION AREA/LAKE POWELL- CENTRAL MOUNTAINS-SOUTHERN MOUNTAINS- 630 AM MST FRI NOV 30 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL UTAH... SOUTHERN UTAH AND SOUTHWEST UTAH. .DAY ONE...TODAY AND TONIGHT MOISTURE SPREADING NORTH THROUGH ARIZONA WILL REACH SOUTHERN UTAH TODAY. SCATTERED SHOWERS THIS AFTERNOON THROUGH EARLY AFTERNOON WILL BECOME WIDESPREAD BY LATE IN THE DAY. HEAVY PRECIPITATION IN THE FORM OF MOUNTAIN SNOW AND LOWER VALLEY RAIN WILL DEVELOP OVERNIGHT. WINTER STORM WARNINGS WILL BE EFFECT FOR THE SOUTHERN AND CENTRAL MOUNTAINS LATER THIS AFTERNOON AND THROUGH THE OVERNIGHT HOURS. HEAVY SNOW AND WIND WILL SETTLE OVER THE WARNING AREA BY THIS EVENING. HEAVY RAINS ARE EXPECTED AT THE LOWER ELEVATIONS NEAR THE ARIZONA BORDER. FLASH FLOODING IS POSSIBLE IN THE SLICK ROCK AND SLOT CANYON AREAS OF THE EXTREME SOUTH. A FLASH FLOOD WATCH WILL BE IN EFFECT TONIGHT FOR THE EXTREME SOUTHERN PORTION OF UTAH. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY LOWER VALLEY RAIN AND MOUNTAIN SNOWS WILL CONTINUE INTO SATURDAY. A FLASH FLOOD WATCH WILL EXTEND THROUGH SATURDAY MORNING FOR EXTREME SOUTHERN UTAH. HEAVY SNOWFALL WILL CONTINUE OVER THE SOUTHERN AND CENTRAL MOUNTAINS THROUGH SATURDAY. A WINTER STORM WARNING WILL REMAIN IN EFFECT THROUGH SATURDAY AFTERNOON. HIGH PRESSURE ALOFT WILL RETURN TO THE AREA LATE SUNDAY...AND REMAIN THROUGH MIDWEEK. A SERIES OF PACIFIC WEATHER DISTURBANCES WILL RETURN AFTER WEDNESDAY...BRINGING COOLER TEMPERATURES AND A THREAT OF PRECIPITATION TO THE AREA LATE IN THE WEEK. .SPOTTER INFORMATION STATEMENT... TRAINED WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER OR HYDROLOGICAL EVENTS ACCORDING TO STANDARD OPERATING PROCEDURES. UTZ001>011-015-WYZ021-011330- 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-WEST CENTRAL UTAH-SOUTHWEST WYOMING- 630 AM MST FRI NOV 30 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL UTAH... NORTHERN UTAH AND SOUTHWEST WYOMING. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS WILL SPREAD INTO THE AREA FROM THE SOUTH LATE TODAY. THIS PRECIPITATION WILL TURN HEAVIER AND BECOME MORE WIDESPREAD TONIGHT. SIGNIFICANT SNOWFALLS ARE POSSIBLE IN THE MOUNTAINS AND HIGHER VALLEYS. NUMEROUS SNOW ADVISORIES ARE IN EFFECT FOR THE OVERNIGHT PERIOD. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SNOW...HEAVY AT TIMES...WILL CONTINUE AT THE HIGHER ELEVATIONS THROUGH MOST OF SATURDAY. THE WASATCH MOUNTAIN VALLEYS..AND THE CASTLE COUNTRY AREA WILL ALSO SEE SIGNIFICANT SNOWS...THOUGH MAINLY DURING THE MORNING HOURS. SNOW ADVISORIES WILL REMAIN IN EFFECT THROUGH MOST OF THE DAY ON SATURDAY. HIGH PRESSURE ALOFT WILL RETURN TO THE AREA LATE SUNDAY...AND REMAIN THROUGH MIDWEEK. A SERIES OF PACIFIC WEATHER DISTURBANCES WILL RETURN AFTER WEDNESDAY...BRINGING COOLER TEMPERATURES AND A THREAT OF PRECIPITATION TO THE AREA LATE IN THE WEEK. .SPOTTER INFORMATION STATEMENT... TRAINED WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER OR HYDROLOGICAL EVENTS ACCORDING TO STANDARD OPERATING PROCEDURES. FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
3 winter storm, 3 heavy snow. Local standard time, as filed.
The UDOT sensor at Brian Head recorded three inches of water, or approximately 20 inches of snow, over a 24 hour period. Note that this event continued into December.
The Strawberry Divide SNOTEL recorded one inch of water (approximately 12 inches of snowfall) in 12 hours. Note that this event continued into December.
The Mammoth Cottonwood SNOTEL recorded two inches of water, or approximately 18 inches of snow, over a period of 20 hours. Note that this event continued into December.
Nine inches of snow fell on the Bountiful Bench in 12 hours, with other sites in the area reporting 6 to 9 inches over the same time period. Note that this event continued into December.
Several locations in the Salt Lake Valley received 6 to 8 inches of snow in 12 hours, including Upper Millcreek, Olympus Cove, and Herriman. Note that this event continued into December.
Kamas, Utah received 9 inches of snow in a 12-hour period. Note that this event continued into December.
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, November 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: 65492, 65488, 65490, 65493, 65496, 65500.