FNUS75 KSLC 042338
FWSSLC

SPOT FORECAST FOR EAST POISON
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
538 PM MDT SAT SEP 4 2010

...RED FLAG WARNING FROM NOON TO 9 PM MDT SUNDAY FOR
GUSTY WINDS AND LOW HUMIDITY FOR AREAS IN THE VICINITY
OF THE FIRE BELOW 7000 FEET...

.DISCUSSION...A WARM DRY SOUTHWEST FLOW WILL CONTINUE ACROSS
THE FIRE SITE THROUGH THIS EVENING. THE AFTERNOON WINDS HAVE
DEVELOPED AND SHOULD STAY ABOUT AS THEY ARE THROUGH ABOUT 1900
...THEN START TO DECOUPLE. THIS WILL CREATE NEAR CRITICAL WIND
AND HUMIDITY CONDITIONS UNTIL WINDS START TO DIMINISH. THE
LOCATION OF THE FIRE JUST EAST OR DOWNWIND OF THE RIDGE LINE WILL
CONTINUE TO CAUSE WINDS ON THE FIRE TO BE SWIRLING AND ERRATIC.

IT WILL BE A MILD NIGHT WITH POOR HUMIDITY RECOVERY THEN WINDS
PICK UP AGAIN SUNDAY BY LATE MORNING AND ARE EXPECTED TO BE
STRONGER THAN TODAY. HUMIDITY WILL REMAIN VERY LOW. WINDS WILL
CONTINUE TO BE SWIRLING AND ERRATIC SUNDAY AND POSSIBLY EVEN MORE
SO THAN TODAY.

THE VICINITY OF THE FIRE BELOW 7000 FEET IS UNDER A RED FLAG
WARNING FROM NOON TO 2100 SUNDAY. THE WIND AND HUMIDITY
CONDITIONS AT THE FIRE WILL BE SIMILAR TO THAT AT THE LOWER
ELEVATIONS AND WILL LIKELY EXCEED CRITICAL LEVELS.

A COLD FRONT WILL CROSS THE FIRE SUNDAY EVENING AROUND 2000 WITH
A SHARP WIND SHIFT TO NORTHERLY. THE WINDS WILL REMAIN STRONG FOR
ABOUT AN HOUR OR SO BEHIND THE FRONT THEN DROP OFF.

MONDAY IS EXPECTED TO COOLER WITH LIGHT SLOPE WINDS.

SOUTHWEST WINDS REDEVELOP TUESDAY AFTERNOON AND INCREASE
WEDNESDAY AHEAD OF THE NEXT PACIFIC STORM. TEMPERATURES WILL WARM
UP AGAIN THROUGH WEDNESDAY.


.TONIGHT...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....59-61.
  MAX HUMIDITY........23-26 PERCENT.
  WINDS - 20-FOOT.....ERRATIC WINDS 10-15 MPH UNTIL 2000 THEN
                      LOCAL DOWNSLOPE 5 MPH.
        - RIDGETOP....SOUTHWEST WINDS 15-20 MPH GUSTING 25-30 MPH
                      DIMINISHING TO 10-15 MPH AFTER 2000.

.SUNDAY...
  LAL.................1.
  HAINES INDEX........6 ..HIGH.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (0-10 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....74-76.
  MIN HUMIDITY........13-15 PERCENT.
  WINDS - 20-FOOT.....LOCAL DOWNSLOPE 5 MPH UNTIL 1000 THEN
                      BECOMING ERRATIC AND SWIRLING 15-25 MPH
                      WITH GUSTS NEAR 30. WINDS SHIFTING TO NORTH
                      15-25 MPH AFTER 2000 DIMINISHING AFTER 2200.
                      MPH AFTER 2000 DIMINISHING AFTER 2200.
        - RIDGETOP....WEST WINDS 15 MPH INCREASING TO 25 TO
                      30 MPH WITH GUSTS TO AROUND 45 MPH AFTER
                      ABOUT 1100. WINDS SHIFTING TO NORTH 20-30
                      MPH AFTER 2000 DIMINISHING AFTER 2200.

.OUTLOOK FOR MONDAY...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......370.
  SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....62-64.
  MIN HUMIDITY........17-19 PERCENT.
  WINDS - 20-FOOT.....NORTHWEST WINDS 10 MPH BECOMING EAST 5 MPH IN
                      THE AFTERNOON.



FORECASTER...WILENSKY
REQUESTED BY...KAREN FEARY
REASON FOR REQUEST...WILDFIRE
.TAG 20100904.EASTP.01/SLC

$$