Wind Advisory 18, NWS Salt Lake City, UT

000 
WWUS75 KSLC 251825
NPWSLC

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1125 AM MST TUE DEC 25 2007

...WIND ADVISORY FOR PORTIONS OF UTAHS DIXIE THROUGH 4 PM TODAY...

UTZ019-252300-
/O.CON.KSLC.WI.Y.0018.000000T0000Z-071225T2300Z/
UTAHS DIXIE AND ZION NATIONAL PARK-
1125 AM MST TUE DEC 25 2007

...WIND ADVISORY REMAINS IN EFFECT UNTIL 4 PM MST THIS
AFTERNOON...

A WIND ADVISORY REMAINS IN EFFECT UNTIL 4 PM MST THIS AFTERNOON. 

STRONG NORTH TO NORTHEAST WINDS AT 20 TO 35 MPH WITH GUSTS TO NEAR
50 MPH WILL OCCUR IN THE NORTH-TO-SOUTH ORIENTED CANYONS THROUGH THE
AFTERNOON. WINDS WILL GRADUALLY DECREASE BEGINNING LATE THIS
AFTERNOON. THESE STRONG WINDS WILL IMPACT TRAVELERS ON I-15
BETWEEN KANARRAVILLE AND LEEDS. WINDS THIS STRONG CAN MAKE DRIVING
DIFFICULT... ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA
CAUTION.

$$

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

000 
WWUS75 KSLC 252243
NPWSLC

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
343 PM MST TUE DEC 25 2007

UTZ019-252345-
/O.EXP.KSLC.WI.Y.0018.000000T0000Z-071225T2300Z/
UTAHS DIXIE AND ZION NATIONAL PARK-
343 PM MST TUE DEC 25 2007

...WIND ADVISORY WILL EXPIRE AT 4 PM MST THIS AFTERNOON...

THE WIND ADVISORY WILL EXPIRE AT 4 PM MST THIS AFTERNOON. 

NORTHERLY WINDS NEAR NORTH-TO-SOUTH ORIENTED CANYONS AND GAPS
ALONG UTAHS DIXIE HAVE DECREASED BELOW ADVISORY CRITERIA THIS
AFTERNOON. THEREFORE...THE WIND ADVISORY WILL BE ALLOWED TO
EXPIRE. WHILE NORTHERLY WINDS WITH OCCASIONAL GUSTS TO NEAR 40 MPH
ARE STILL POSSIBLE THROUGH THE REMAINDER OF THE AFTERNOON...THESE
WINDS ARE EXPECTED TO TAPER OFF THIS EVENING.

$$

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
927 PM MST MON DEC 24 2007

.SYNOPSIS...A PACIFIC STORM SYSTEM WILL CONTINUE TO IMPACT UTAH
THROUGH TONIGHT. ANOTHER STORM IS EXPECTED FOR WEDNESDAY AND
WEDNESDAY NIGHT. COLD TEMPERATURES WILL REMAIN IN PLACE THROUGH THE
WEEK.

&&

.DISCUSSION...COLD FRONT THAT BLASTED THROUGH NORTHERN UTAH THIS
AFTERNOON IS NOW SITUATED NEAR A LINE EXTENDING FROM CEDAR CITY TO
VERNAL. THE FRONTAL BAND DUMPED 2-4 INCHES OF SNOW ALONG PORTIONS
OF THE WASATCH FRONT WITHIN A MATTER OF ABOUT 4 HOURS. THIS BAND OF
SNOW HAS MOVED SOUTH WITH THE FRONT AND IS NOW IMPACTING CENTRAL AND
PORTIONS OF SOUTHERN UTAH...ALBEIT WITH LESS INTENSITY.
PRECIPITATION MAY SPREAD AS FAR SOUTH AS THE ARIZONA BORDER...BUT
SNOW AMOUNTS ACROSS SOUTHERN UTAH AND CENTRAL VALLEYS ARE EXPECTED
TO REMAIN SUB-ADVISORY.

NORTHERN UTAH RECEIVED A BRIEF BREAK IN THE SNOW BEHIND THE FRONTAL
BAND. HOWEVER...AN AREA OF SNOW DEVELOPED NEAR THE OGDEN AREA
EARLIER THIS EVENING. IT APPEARS THIS MAY HAVE BEEN ASSOCIATED WITH
A WEAK VORT LOBE OR MESOSCALE CIRCULATION FEATURE. THE 700MB FLOW
TURNS NORTHERLY TONIGHT...AND THIS WILL NOT BE CONDUCIVE TO
OROGRAPHIC EFFECTS ALONG THE WASATCH MOUNTAINS. HOWEVER...OCCASIONAL
SNOW SHOWERS ARE STILL A GOOD BET FOR THE REST OF THE EVENING AND
INTO THE OVERNIGHT HOURS ACROSS NORTHERN AND CENTRAL UTAH AS COLD
AIR ALOFT...DOWN TO NEAR -35C AT 500MB...IS PROGGED TO DIVE OVER THE
GREAT SALT LAKE. BUFR SOUNDINGS INDICATE DEEP LAYER INSTABILITY WITH
AMPLE MOISTURE TO WORK WITH AFTER AROUND 06Z.

EXPECT TO SEE ENHANCEMENT DOWNSTREAM OF THE GREAT SALT LAKE
TONIGHT. RADAR ALREADY INDICATING ECHOES TRYING TO DEVELOP OVER THE
LAKE THIS EVENING EVEN AS THE COLD POOL REMAINS OVER SOUTHERN IDAHO.
WITH WINDS VEERING TO NORTHERLY...EXPECT ANY LAKE-EFFECT BANDS THAT
DEVELOP TO END UP IMPACTING MAINLY THE WESTERN PART OF THE SALT LAKE
VALLEY AND EASTERN TOOELE VALLEY. THIS BAND COULD ALSO EXTEND SOUTH
AND EAST INTO PORTIONS OF THE SOUTHERN WASATCH MOUNTAINS AND UTAH
COUNTY AS WELL. HEAVY SNOW AND WINTER STORM WARNINGS CONTINUE TO
COVER AREAS THAT COULD POTENTIALLY RECEIVE SIGNIFICANT SNOWFALL DUE
TO LAKE-EFFECT THROUGH 11 AM TOMORROW. HOWEVER...MODELS SUGGEST THAT
THE LAKE-EFFECT AND ANY LINGERING SNOW SHOWERS SHOULD TAPER OFF
SHORTLY AFTER 12Z AS THE AIRMASS BECOMES DRIER AND MORE STABLE.
CURRENT ADVISORIES FOR OTHER NORTHERN AND CENTRAL UTAH ZONES ALSO
CONTINUE AS PLANNED. EXPECT RIDGE TO BUILD OVER THE AREA TOMORROW
AFTERNOON WITH COLD TEMPERATURES. NEXT SYSTEM STILL ON TRACK FOR
WEDNESDAY.

WILL UPDATE TO TWEAK SOME WORDING IN ZONES...MAINLY FOR WINDS.
OTHERWISE...NO SIGNIFICANT CHANGES EXPECTED.

&&

.AVIATION...LOW-END VFR CONDITIONS HAVE SETTLED IN AT SLC TERMINAL
AND CONDITIONS ARE EXPECTED TO STAY THAT WAY OVERNIGHT DURING THE
SNOW-FREE PERIODS. HOWEVER...WITH SNOW SHOWERS STILL IN THE
AREA...BRIEF PERIODS OF MVFR OR IFR CONDITIONS IN LIGHT SNOW ARE
POSSIBLE THROUGH TOMORROW MORNING. IN ADDITION...LAKE EFFECT SNOW IS
EXPECTED TO FORM BETWEEN 05Z AND 09Z. SHOULD THIS BAND SET UP OVER
THE AIRPORT...EXTENDED PERIODS OF IFR OR LIFR ARE POSSIBLE. CEILINGS
ARE EXPECTED TO STAY AT OR BELOW 6000FT AGL THROUGH THE
NIGHT...UNTIL THE LOW CLOUDS CLEAR OUT BETWEEN 15Z AND 18Z TUESDAY.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...HEAVY SNOW WARNING UNTIL 11 AM TUESDAY FOR UTZ003-UTZ004.

     WINTER STORM WARNING UNTIL 11 AM TUESDAY FOR UTZ008.

     SNOW AND BLOWING SNOW ADVISORY UNTIL 4 AM TUESDAY FOR UTZ007-
     UTZ009-UTZ010-UTZ517.

     SNOW ADVISORY UNTIL 4 AM TUESDAY FOR UTZ001-UTZ002-UTZ006.

WY...SNOW AND BLOWING SNOW ADVISORY UNTIL 4 AM TUESDAY FOR WYZ021.

&&

PUBLIC...CHENG
AVIATION...SCHOENING

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
504 AM MST MON DEC 24 2007

UTZ001>016-019>021-517-518-WYZ021-251300-
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-
504 AM MST MON DEC 24 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF
UTAH AND SOUTHWEST WYOMING.

.DAY ONE...TODAY AND TONIGHT

A PACIFIC STORM SYSTEM AND ASSOCIATED COLD FRONT WILL PASS THROUGH
THE AREA TODAY THROUGH TONIGHT...BRINGING A THREAT FOR SNOWFALL TO
NORTHERN AND CENTRAL PORTIONS OF THE OUTLOOK AREA.
ADDITIONALLY...HEAVY SNOWFALL WILL BE POSSIBLE SOUTH AND SOUTHEAST
OF THE GREAT SALT LAKE TONIGHT. SEE THE LATEST WINTER WEATHER
STATEMENT FOR ADDITIONAL INFORMATION.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ANOTHER PACIFIC STORM SYSTEM IS EXPECTED TO MOVE THROUGH THE AREA
WEDNESDAY AND WEDNESDAY NIGHT...BRINGING ANOTHER ROUND OF SNOW TO
PORTIONS OF THE OUTLOOK AREA. ADDITIONALLY...VERY COLD AIR
ASSOCIATED WITH THIS SYSTEM WILL SPREAD ACROSS THE AREA WEDNESDAY
NIGHT INTO THURSDAY.

WIDESPREAD SNOWFALL WILL AGAIN BE POSSIBLE FRIDAY AS PACIFIC
MOISTURE SPREADS EAST ACROSS THE AREA. THIS UNSETTLED PATTERN MAY
CONTINUE INTO THE UPCOMING WEEKEND.

.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)