Snow Advisory 3, NWS Salt Lake City, UT

000 
WWUS45 KSLC 051727
WSWSLC

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1027 AM MST FRI JAN 5 2007


UTZ015-051830-
/O.CAN.KSLC.HS.W.0001.000000T0000Z-070105T1800Z/
WEST CENTRAL UTAH-
1027 AM MST FRI JAN 5 2007

...HEAVY SNOW WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS CANCELLED THE
HEAVY SNOW WARNING. 

THE BAND OF HEAVY SNOW THAT IMPACTED THE AREA OVERNIGHT HAS MOVED
SOUTH THIS MORNING. THEREFORE THE HEAVY SNOW WARNING HAS BEEN
CANCELLED. SCATTERED SNOW SHOWERS WILL CONTINUE ACROSS WEST
CENTRAL INTO THE AFTERNOON WITH SOME LOCAL ACCUMULATIONS POSSIBLE
ALONG THE I-15 CORRIDOR. HOWEVER...ANY ADDITIONAL ACCUMULATIONS
WILL BE LIGHT.


$$

UTZ003-004-051830-
/O.CAN.KSLC.SN.Y.0003.000000T0000Z-070105T2000Z/
SALT LAKE AND TOOELE VALLEYS-SOUTHERN WASATCH FRONT-
1027 AM MST FRI JAN 5 2007

...SNOW ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS CANCELLED THE
SNOW ADVISORY. 

THE HEAVIER SNOW SHOWERS AND THE LAKE EFFECT BAND WHICH IMPACTED
THE AREA THIS MORNING HAVE DISSIPATED. THEREFORE THE SNOW
ADVISORY HAS BEEN CANCELLED. SCATTERED SNOW SHOWERS WILL CONTINUE
TO DEVELOP ACROSS NORTHERN UTAH INTO THE AFTERNOON ALTHOUGH ANY
ADDITIONAL ACCUMULATIONS WILL BE SPOTTY AND LIGHT.

$$

UTZ008-017-052000-
/O.CON.KSLC.WS.W.0001.000000T0000Z-070105T2000Z/
WASATCH MOUNTAINS SOUTH OF I-80-CENTRAL AND SOUTHWEST MOUNTAINS-
1027 AM MST FRI JAN 5 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 PM MST THIS
AFTERNOON...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 PM MST THIS
AFTERNOON. 

THIS WARNING IS FOR THE WASATCH RANGE SOUTH OF I-80 AS WELL AS
FOR THE CENTRAL AND SOUTHWEST MOUNTAINS OF UTAH.

SNOW SHOWERS WILL CONTINUE TO IMPACT THE WASATCH MOUNTAINS SOUTH
OF I-80 AND THE CENTRAL AND SOUTHWEST MOUNTAINS THROUGH EARLY
AFTERNOON. ADDITIONAL SNOW ACCUMULATIONS OF 1 TO 2 INCHES ARE
EXPECTED WITH LOCALLY UP TO 4 INCHES POSSIBLE. THE SNOW SHOWERS
ARE EXPECTED TO DIMINISH DURING THE AFTERNOON HOURS.

NORTH WINDS AT 20 TO 30 MPH ACROSS RIDGES WILL CAUSE BLOWING AND
DRIFTING SNOW. WINDS WILL BE LOCALLY STRONGER IN CANYONS ACROSS
SOUTHWEST UTAH AND OVER THE RIDGES OF THE WASATCH RANGE.

$$

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
345 AM MST FRI JAN 5 2007

...AVIATION DISCUSSION UPDATED...

.SYNOPSIS...AN UPPER LEVEL TROUGH WILL MOVE ACROSS UTAH TODAY.
WEAK HIGH PRESSURE ALOFT WILL BUILD INTO THE REGION TONIGHT BEFORE
ANOTHER DISTURBANCE ARRIVES SATURDAY AFTERNOON AND NIGHT.
STRONGER HIGH PRESSURE ALOFT SETS UP FOR EARLY NEXT WEEK.

&&

.DISCUSSION...LARGE BAND OF ENHANCED CLOUDS ACROSS SOUTHERN 2/3
OF UTAH REPRESENTS THE EXITING JET STREAK WITH PVA AND COLD AIR
ADVECTION ALOFT WITH LEADING BAROCLINIC ZONE ACROSS FAR SOUTHERN
UTAH THIS HOUR. SOUTHERN BOUNDARY HAS BEEN PRODUCING HEAVY SNOW IN
THE SOUTH (0.60 AT CEDAR CITY) WHICH CONTINUES ALONG THE ARIZONA
BORDER...THIS WAS NORTHERN UTAHS STORM FROM THURSDAY. NORTHERN EDGE
PRODUCED A FEW SNOW SHOWERS IN NORTH FLOW THAT MOVED SOUTH ACROSS
THE WASATCH FRONT NEAR MIDNIGHT BUT LITTLE EVIDENCE OF LAKE
INVOLVEMENT AS THEY STARTED NORTH OF THE LAKE. FINAL PHASE OF THE
STORM COMPLEX IS DROPPING SOUTH ACROSS NORTHEAST NEVADA AND
NORTHWEST UTAH THIS MORNING WITH BRIEF CLEARING IN BETWEEN ENHANCED
CLOUD SHIELDS. AREA OF SYNOPTIC INSTABILITY SNOW SHOWERS WILL AFFECT
THE MORNING VALLEY COMMUTE AND MOUNTAINS AS THE UPPER COLD POCKET
(-17C AT 700 MB AND -34C AT 500 MB) AND VORT MAX SLIDE INTO WESTERN
UTAH...DIGGING INTO WEST CENTRAL UTAH THIS MORNING. THERE IS A
WINDOW FOR LAKE ENHANCEMENT THIS MORNING STARTING NOW THROUGH 18Z
GIVEN SUFFICIENTLY STEEP LAPSE RATES AND UNIDIRECTIONAL NORTH FLOW.
00Z LOCAL WRF-NMM... VIEWABLE ONLINE...PICKS UP ON THIS IDEA AND
LOCAL TERRAIN INSTABILITY ENHANCED SNOW SHOWERS. THE TARGET AREA FOR
BAND DEVELOPMENT UNDER THE UPPER TROUGH AXIS WILL BE THE TOOELE
VALLEY MAINLY...BUT BRIEFLY ENHANCED IN WESTERN SALT LAKE AND UTAH
VALLEYS POSSIBLY.

PLAN IS TO ISSUE SNOW ADVISORY FOR MORNING COMMUTE FOR SL AND TOOELE
VALLEYS AS WELL AS UTAH VALLEY WITH TEMPERATURES IN THE 20S AND
EFFICIENT SNOW PRODUCTION...PLUS THE MAIN ISSUE OF LAKE
INVOLVEMENT ADDING TO THE SNOW POTENTIAL. SMALL LAKE BAND ON THE
SOUTHWEST SIDE OF THE GSL COULD PRODUCE UP TO 6 INCHES OF SNOW. WILL
EXTEND WARNING FOR WEST CENTRAL UTAH WHERE THE I-15 CORRIDOR WILL
GET A COUPLE INCHES OF FLUFF THIS MORNING. WILL ALLOW SOUTHWEST UTAH
TO EXPIRE SINCE THE REAL HEAVY SNOW IS NOW TAPERING OFF THERE AND
ADDITIONAL SNOW WILL BE MINOR. CENTRAL AND SOUTHWEST MOUNTAINS WILL
CONTINUE WARNING WHERE THE PAHVANT RANGE WILL FAVOR THE NORTH FLOW
AND UPPER TROUGH PLACEMENT THIS MORNING. ADDITIONAL SNOW SHOWERS IN
FAVORED AREAS THIS AFTERNOON BUT LARGE SCALE SUBSIDENCE TAKES OVER.
WINDS IN SOUTHWEST UTAH INCREASING THIS MORNING AND WILL PEAK THIS
AFTERNOON AND EVENING. WILL CONTINUE HEADLINES IN THIS REGION AND
EXPAND AN ADVISORY TO COVER REST OF SOUTHWEST MOUNTAIN ZONES DURING
PEAK WIND PERIOD.

CLEARING AND VERY COLD TONIGHT. HIGH CLOUDS AHEAD OF THE NEXT WAVE
ON TRACK FOR LATE TONIGHT IN THE NORTH. THIS SYSTEM APPEARS STRONGER
ON 00Z/06Z GFS AND NAM-WRF WITH PREFRONTAL SOUTHERLY LOW LEVEL FLOW
SATURDAY AND A WEAK LOW LEVEL WIND SHIFT SATURDAY EVENING. BRIEF
COLD AIR ADVECTION ALOFT OCCURS IN MODERATE FLOW SATURDAY NIGHT.
HAVE INCREASED TIMING AND WEATHER CHANCES FOR THIS PERIOD.
ACCUMULATIONS FOR WASATCH RANGE BUT LIKELY JUST LIGHT SNOW FOR
VALLEYS. WARM AIR ADVECTION PROGGED ON SUNDAY WITH ADDITIONAL 700 MB
MOISTURE IN THE NORTH BUT THIS SHOULD BE ONLY CLOUDS AND LIGHT SNOW
FOR THE NORTHEAST MOUNTAINS.

UPPER RIDGE BUILDS OVER THE GREAT BASIN MONDAY AND TUESDAY WITH
SIGNIFICANT WARMING. INVERSION OVER SNOW DEVELOPS ALONG THE I-15
CORRIDOR. NEXT SYSTEM PROGGED SIMILAR BY THE 00Z GFS AND ECMWF.
WARMER SOUTHWEST FLOW WOULD OCCUR ON WEDNESDAY WITH BETTER
WESTERN VALLEY MIXING. FRONTAL BOUNDARY WOULD SAG ACROSS NORTHERN
UTAH WEDNESDAY NIGHT INTO THURSDAY. MEAN UPPER TROUGH DIGS ALONG
THE SIERRA NEVADA LATE IN THE WEAK...STALLING AND ENHANCING A FRONTAL
BOUNDARY SOMEWHERE ACROSS UTAH INTO FRIDAY. COULD BE SIGNIFICANT
SNOW EVENT...WHERE DEPENDS ON DYNAMICS.

&&

.AVIATION...VFR CONDITIONS ARE EXPECTED UNTIL ABOUT 12Z BUT THEN AS
THE COLD POCKET ALOFT MOVES ACROSS THE SLC AREA THERE IS A HIGH
PROBABILITY THAT LIGHT SNOW WITH GREAT SALT LAKE EFFECT ENHANCED
SNOW SHOWERS WILL DEVELOP. THE GREATEST THREAT OF IFR OR EVEN LIFR
WILL OCCUR BETWEEN 13Z AND 16Z WITH A 30 PERCENT CHANCE OF LINGERING
UNTIL 18Z IF THE FLOW ALOFT REMAINS NORTHWEST. ACCUMULATIONS OF 1
INCH LIKELY WITH A 40 PERCENT CHANCE OF 2 INCHES OR MORE.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...SNOW ADVISORY UNTIL 2 PM FOR THE SALT LAKE AND TOOELE
     VALLEYS AND SOUTHERN WASATCH FRONT...UTAH ZONE 3 AND 4.

     WINTER STORM WARNING UNTIL 11 AM UTZ017 CENTRAL AND SW
     MOUNTAINS

     HEAVY SNOW WARNING UNTIL 11 AM UTZ015 WEST CENTRAL UTAH

     HIGH WIND WARNING UNTIL MIDNIGHT FOR UTZ019 DIXIE

     WIND ADVISORY NOON TO MIDNIGHT FOR UTZ017 SOUTHWEST MTNS

WY...NONE.

&&

TARDY

AVIATION...STRUTHWOLF

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
700 AM MST THU JAN 4 2007

UTZ001>009-WYZ021-051400-
CACHE VALLEY/UTAH PORTION-GREAT SALT LAKE DESERT AND MOUNTAINS-
NORTHERN WASATCH FRONT-SALT LAKE AND TOOELE VALLEYS-
SOUTHERN WASATCH FRONT-SOUTHWEST WYOMING-WASATCH MOUNTAIN VALLEYS-
WASATCH MOUNTAINS I-80 NORTH-WASATCH MOUNTAINS SOUTH OF I-80-
WESTERN UINTA MOUNTAINS-
700 AM MST THU JAN 4 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS THE NORTHERN THIRD
OF UTAH AND SOUTHWEST WYOMING.

.DAY ONE...TODAY AND TONIGHT

A COLD FRONT WILL MOVE THROUGH THE AREA TODAY. LIGHT PRECIPITATION
AHEAD OF THE FRONT WILL TURN HEAVIER DURING THE MORNING AS THE COLD
AIR WORKS INTO NORTHERN UTAH. SEVERAL INCHES OF SNOW ARE EXPECTED IN
THE MOUNTAINS WITH THIS FRONT. A WINTER STORM WARNING AND OTHER
WINTER WEATHER ADVISORIES ARE IN EFFECT THROUGH EARLY THIS EVENING.
SEE THE LATEST WINTER WEATHER PRODUCTS FOR DETAILS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SNOW SHOWERS WILL LINGER THROUGH AT LEAST EARLY FRIDAY OVER AND NEAR
THE MOUNTAINS. A NORTHWEST FLOW ALOFT COULD BRING ADDITIONAL LIGHT
SNOW TO FAR NORTHERN UTAH AND SOUTHWEST WYOMING EARLY THIS WEEKEND.
DRY CONDITIONS WITH GENERALLY SEASONAL TEMPERATURES ARE EXPECTED
DURING THE EARLY AND MIDDLE PORTIONS OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

UTZ012-014>017-019-051400-
CASTLE COUNTRY-CENTRAL AND SOUTHWEST MOUNTAINS-
SANPETE/SEVIER VALLEYS-SOUTHWEST UTAH-
UTAHS DIXIE AND ZION NATIONAL PARK-WEST CENTRAL UTAH-
700 AM MST THU JAN 4 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND
WESTERN UTAH.

.DAY ONE...TODAY AND TONIGHT

A PACIFIC COLD FRONT WILL MOVE INTO CENTRAL UTAH LATER TODAY...THEN
SETTLE INTO EXTREME SOUTHERN UTAH THIS EVENING. SNOW WILL DEVELOP
ALONG THE FRONT...AND CONTINUE INTO THIS EVENING. A SNOW ADVISORY
HAS BEEN ISSUED FOR THE CENTRAL AND SOUTHWEST MOUNTAINS BEGINNING
THIS EVENING. SEE THE LATEST WINTER WEATHER PRODUCT FOR DETAILS.

A HIGH WIND WATCH IS EFFECT BEGINNING LATE TONIGHT. STRONG GAPS WINDS
WILL DEVELOP BEHIND THE COLD FRONT THROUGH THE CANYONS OF WASHINGTON
COUNTY LATE TONIGHT. SUSTAINED WINDS OF 25-35 MPH WITH MUCH STRONG
GUSTS ARE EXPECTED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A COLD UPPER LEVEL TROUGH WILL SETTLE OVER SOUTHERN UTAH FRIDAY.
THIS TROUGH WILL BRING ANOTHER ROUND OF SNOW TO THE MOUNTAINS AND
WESTERN VALLEYS DURING THE DAY. SEVERAL INCHES OF SNOW ARE POSSIBLE
IN THE MOUNTAINS AND ADJACENT VALLEYS. THE SNOW ADVISORY ISSUED
FOR THURSDAY NIGHT WILL CONTINUE INTO FRIDAY.

GAPS WINDS IN THE NORTH TO SOUTH CANYONS OF WASHINGTON COUNTY WILL
HIT THEIR PEAK DURING THE DAY AND EVENING OF FRIDAY. SUSTAINED
WINDS IN EXCESS OF 40 MPH WITH SIGNIFICANTLY STRONGER GUSTS ARE
ANTICIPATED THROUGH FRIDAY EVENING.

HIGH PRESSURE ALOFT STRENGTHENING ALONG THE WEST COAST WILL
MAINTAIN DRY AND GENERALLY MILD CONDITIONS ACROSS THE AREA THIS
WEEKEND...AND ON INTO THE FIRST HALF OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

UTZ010-011-013-018-020-021-029-051400-
CANYONLANDS AND NATURAL BRIDGES-
GLEN CANYON RECREATION AREA/LAKE POWELL-HENRY MOUNTAINS-
SAN RAFAEL SWELL-SOUTH CENTRAL UTAH-WASATCH PLATEAU/BOOK CLIFFS-
WESTERN UINTA BASIN-
700 AM MST THU JAN 4 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN AND EXTREME SOUTHERN
UTAH.

.DAY ONE...TODAY AND TONIGHT

A COLD FRONT WILL PUSH SOUTH THROUGH EASTERN UTAH LATE TODAY...THEN
SETTLE OVER EXTREME SOUTHERN UTAH LATER TONIGHT. SCATTERED SHOWERS
WILL DEVELOP ALONG THE FRONT. HIGHER ELEVATIONS WILL RECEIVE SNOW...
THOUGH ONLY A FEW INCHES OF ACCUMULATION ARE EXPECTED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SNOW SHOWERS WILL LINGER OVER THE MOUNTAINS OF EASTERN UTAH FRIDAY.
HIGH PRESSURE BUILDING ALONG THE WEST COAST THIS WEEKEND WILL
PRODUCE DRY AND GENERALLY MILD CONDITIONS ACROSS EASTERN AND
EXTREME SOUTHERN UTAH THIS WEEKEND...AND ON THROUGH THE MIDDLE OF
NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.