FNUS75 KSLC 241449
FWSSLC

SPOT FORECAST FOR BRIDGE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
849 AM MDT WED JUN 24 2009

.DISCUSSION...A RIDGE OF HIGH PRESSURE OVER THE INTERMOUNTAIN REGION
WILL REMAIN IN PLACE TODAY...BEFORE SHIFTING EAST TONIGHT AND
THURSDAY.  LIGHT FLOW ASSOCIATED WITH THIS RIDGE WILL KEEP WINDS
GENERALLY LIGHT...AND DRIVEN BY SLOPE FLOWS. UNDER THIS
RIDGE...MOISTURE WILL SEEP NORTHWARD TODAY...PRODUCING A SLIGHT CHANCE
FOR AFTERNOON THUNDERSTORMS...ESPECIALLY OVER THE HIGHER TERRAIN. RH
VALUES ARE EXPECTED TO REMAIN BELOW 15 PERCENT ALONG THE SLOPE TODAY
THROUGH MUCH OF TONIGHT.

A TROUGH OF LOW PRESSURE FROM THE PACIFIC NORTHWEST TO JUST OFF THE
CALIFORNIA COAST WILL MOVE EASTWARD...CROSSING THE AREA ON FRIDAY.
WITH THE APPROACH OF THIS SYSTEM...MOISTURE WILL CONTINUE TO INCREASE
ACROSS THE REGION...WITH THUNDERSTORMS BECOMING MORE WIDESPREAD
THURSDAY. THIS WILL ALSO ALLOW FOR BETTER OVERNIGHT RH RECOVERY BY
THURSDAY NIGHT.

.TODAY...
  LAL.................1 UNTIL NOON...THEN 4.
  HAINES INDEX........6 ..HIGH.
  CLEARING INDEX......800.
  SKY/WEATHER.........MOSTLY SUNNY (10-20 PCT CLOUD COVER) UNTIL
                      1300...THEN PARTLY CLOUDY (35-45 PCT CLOUD COVER).
                      ISOLATED HIGH BASED SHOWERS AND DRY THUNDERSTORMS
                      AFTER NOON.
  MAX TEMPERATURE.....NEAR 80.
  MIN HUMIDITY........10-13 PERCENT.
  WINDS - 20-FOOT.....NORTHEAST/DOWNSLOPE 3-7 MPH BECOMING
                      SOUTHWEST/UPSLOPE 4-9 MPH AFTER 1200. GUSTY ERRATIC
                      WINDS NEAR AREAS OF VIRGA.

.TONIGHT...
  LAL.................4.
  HAINES INDEX........5 ..MODERATE.
  SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT CLOUD COVER).
                      ISOLATED HIGH BASED SHOWERS AND THUNDERSTORMS
                      UNTIL 2200.
  MIN TEMPERATURE.....54-57.
  MAX HUMIDITY........22-25 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST/UPSLOPE 3-7 MPH BECOMING
                      NORTHEAST/DOWNSLOPE 4-9 MPH AFTER 1200. GUSTY
                      ERRATIC WINDS NEAR AREAS OF VIRGA

.OUTLOOK FOR THURSDAY...
  LAL.................4.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER)
                      THEN BECOMING MOSTLY CLOUDY (70-80 PERCENT
                      CLOUD COVER). A CHANCE OF SHOWERS AND
                      THUNDERSTORMS.
  MAX TEMPERATURE.....76-78.
  MIN HUMIDITY........16-19 PERCENT.
  WINDS - 20-FOOT.....NORTHEAST/DOWNSLOPE 3-7 MPH BECOMING
                      SOUTHWEST/UPSLOPE 4-9 MPH AFTER 1200. GUSTY
                      ERRATIC WINDS NEAR AREAS OF VIRGA.



FORECASTER...SEAMAN
REQUESTED BY...TREVOR FRANDSEN
REASON FOR REQUEST...WFU
.TAG 20090624.BRIDG.01/SLC

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