FNUS75 KSLC 211541
FWSSLC

SPOT FORECAST FOR AMOS CANYON WFM
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
939 AM MDT TUE JUL 21 2009

.DISCUSSION...AN APPARENT UPPER LOW ACROSS NORTHWEST ARIZONA THIS
MORNING WILL DRIFT SLOWLY SOUTH TODAY. MOISTURE WRAPPED AROUND THIS
LOW WILL PRODUCE AN INCREASING AREA OF SHOWERS AND THUNDERSTORMS
BEGINNING LATE THIS MORNING...AND CONTINUE INTO THIS EVENING.

CONCERN TODAY IS THAT THE FIRE SITE SITS RIGHT ON THE NORTHERN EDGE
OF THE MOISTURE PLUME. SUSPECT THAT THE SITE WILL SEE MORE SUNSHINE
LATER THIS MORNING...LEADING TO AN INCREASED THREAT OF
THUNDERSTORMS OVER/NEAR THE SITE DURING THE AFTERNOON. STORMS THAT DO
DEVELOP WILL LIKELY END BY EARLY THIS EVENING AS THE UPPER LOW OVER
ARIZONA CONTINUES TO DRIFT SOUTH. DRIER AIR MOVING INTO THE AREA
SHOULD INHIBIT ANY SHOWER/THUNDERSTORM DEVELOPMENT WEDNESDAY AND
THURSDAY.

.TODAY...
  LAL.................1 UNTIL 1100...THEN 4.
  HAINES INDEX........6 ..HIGH.
  CLEARING INDEX......800.
  SKY/WEATHER.........PARTLY CLOUDY (60-70 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF SHOWERS UNTIL 1100...THEN A
                      CHANCE OF SHOWERS AND THUNDERSTORMS AFTER
                      1100.
  MAX TEMPERATURE.....76-79.
  MIN HUMIDITY........28-31 PERCENT.
  WINDS - 20-FOOT.....NORTHWEST WINDS 5 TO 10 MPH...GUSTY AND
                      ERRATIC WINDS ASSOCIATED WITH ANY SHOWERS OR
                      THUNDERSTORMS.

.TONIGHT...
  LAL.................2 UNTIL MIDNIGHT...THEN 1.
  HAINES INDEX........6 ..HIGH.
  SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT CLOUD COVER).
                      A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
                      UNTIL 2100...MOSTLY CLEAR (15-25 PERCENT CLOUD
                      COVER) AFTER MIDNIGHT.
  MIN TEMPERATURE.....55-58.
  MAX HUMIDITY........55-58 PERCENT.
  WINDS - 20-FOOT.....NORTH WINDS 5 TO 10 MPH UNTIL 2300...THEN
                      SOUTHEAST 4 TO 8 MPH.

.OUTLOOK FOR WEDNESDAY...
  LAL.................1.
  HAINES INDEX........6 ..HIGH.
  CLEARING INDEX......760.
  SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT CLOUD COVER) THEN
                      BECOMING PARTLY CLOUDY (35-45 PERCENT CLOUD
                      COVER).
  MAX TEMPERATURE.....79-82.
  MIN HUMIDITY........21-23 PERCENT.
  WINDS - 20-FOOT.....SOUTHEAST WINDS 4 TO 8 MPH SHIFTING TO THE
                      NORTHWEST 6 TO 12 MPH AFTER 1000.


FORECASTER...CONGER
REQUESTED BY...Eddie Taylor
REASON FOR REQUEST...WILDFIRE
.TAG 20090721.AMOSC.01/SLC

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