High Wind in Utah, June 8, 2002

UTAH AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
930 AM MDT SAT JUN 8 2002

.SYNOPSIS...AN UPPER LEVEL LOW PRESSURE SYSTEM WILL MOVE ACROSS
SOUTHERN IDAHO AND NORTHERN UTAH DURING THOROUGH SUNDAY. A DRY COLD
FRONT WILL REMAIN NEARLY STATIONARY OVER CENTRAL UTAH TONIGHT AND
PUSH SLOWLY SOUTH ON SUNDAY.

.DISCUSSION...COLD FRONT EXTENDS FROM THE NORTH EAST CORNER OF UTAH
TO WESTERN MILLARD COUNTY THIS AFTERNOON.  THE FRONT DOES NOT APPEAR
TO BE MAKING MUCH PROGRESS SOUTHWARD AT THIS TIME.  HOWEVER...MODELS
INDICATE IT WILL MOVE SLOWLY SOUTH ON SUNDAY. SURFACE PRESSURE
GRADIENT BEHIND THE FRONT IS EXPECTED TO DECREASE TONIGHT AND INTO
SUNDAY.  WINDS ALOFT REMAIN STRONG OVER THE SOUTH...REACHING PEAK
VELOCITIES BETWEEN 03Z AND 09Z...ACCORDING TO THE MESO ETA.
HOWEVER...BY THAT TIME WINDS ALOFT AND SURFACE WINDS SHOULD HAVE
UNCOUPLED WITH DECREASING WINDS AT THE SURFACE IN THE VALLEYS.
WINDS IN THE MOUNTAINS WILL REMAIN STORM ALL NIGHT.  BOTTOM LINE FOR
WINDS...ADVISORY LEVELS OVER SOUTHERN AND WESTERN VALLEYS THROUGH
THIS EVENING AND THROUGH THE REST OF TONIGHT FOR THE SOUTHERN
MOUNTAINS. THE GRADIENT ALOFT REMAINS STRONG ON SUNDAY AND WIND
ADVISORIES ARE POSSIBLE ON SUNDAY AS WELL. THERE IS SOME MOISTURE
OVER THE NORTH...MAINLY ALONG THE LEADING EDGE OF THE COLD AIR
ALOFT...BUT DYNAMICS ARE LACKING FOR SIGNIFICANT VERTICAL
DEVELOPMENT. SO SOME CHANCE OF SHOWERS IN THE EXTREME NORTH AND
NORTHERN MOUNTAINS TONIGHT AND SUNDAY BUT DONT EXPECTED
THUNDERSTORMS. AIR IS COLD ENOUGH OVER THE NORTH FOR SNOW SHOWERS AT
HIGHEST ELEVATIONS. TEMPERATURES IN THE NORTH ARE EXPECTED TO DROP
AS THE COLD AIR ALOFT PUSHES FURTHER INTO THE STATE TONIGHT AND
SUNDAY.  IN THE SOUTH TEMPERATURES WILL SHOW ONLY LITTLE CHANGE
UNTIL THE COLD FRONT PASSES BY LATER SUNDAY OR SUNDAY NIGHT.

THE TROUGH HANGS OVER THE AREA ON MONDAY AND INTO MONDAY NIGHT BUT
IS EXPECTED TO BE WEAKER WITH SIGNIFICANT MOISTURE MAINLY NORTH OF
THE FORECAST AREA. HIGH PRESSURE RIDGE BEGINS TO BUILD BACK OVER THE
AREA ON TUESDAY AS THE LOW PRESSURE TROUGH LIFTS OUT TO THE
NORTHEAST. TEMPERATURES AT THE SURFACE AND ALOFT ARE EXPECTED TO
RISE SIGNIFICANTLY IN THE NORTH ON TUESDAY BUT NOT SO MUCH IN THE
SOUTH. RIDGE CONTINUES TO SLOWLY BUILD WEDNESDAY AND THURSDAY WITH
WARMER AND DRIER CONDITIONS. THE RIDGE IS THEN EXPECTED TO MOVE
SLOWLY TO THE EAST ON FRIDAY AND SATURDAY IN ADVANCE OF ANOTHER
UPPER LEVEL LOW MOVING INTO THE PACIFIC NORTHWEST.

SLC 11--  CDC -11- TORONTO

.SLC...WIND ADVISORY THIS EVENING WESTERN AND SOUTHERN VALLEYS
       OF UTAH UTZ005-012>016-019>021.
       WIND ADVISORY FOR TONIGHT SOUTHERN MOUNTAINS UTZ017-018.
    ...RED FLAG WARNING CENTRAL AND SOUTHWEST UTAH THROUGH SUNDAY.