FNUS75 KSLC 040025
FWSSLC

SPOT FORECAST FOR TWITCHELL CANYON
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
625 PM MDT FRI SEP 3 2010

...FIRE WEATHER WATCH FOR SUNDAY NOON THROUGH SUNDAY EVENING FOR
LOW RH AND GUSTY WINDS...

.DISCUSSION...WARM DRY HIGH PRESSURE WILL REMAIN IN PLACE OVER
THE AREA TONIGHT. WINDS WILL BE GENERALLY LIGHT UPSLOPE/DOWNSLOPE
WHILE ON THE RIDGES THEY COULD BE INFLUENCE BY THE SOUTHWEST
GENERAL FLOW ALOFT OF ABOUT 10 MPH. POOR RH RECOVERY IS EXPECTED
TONIGHT WITH MAX RH AROUND 25%.
THE HIGH WEAKENS SATURDAY AS A COLD FRONT APPROACHES FROM THE
NORTHWEST. TEMPERATURES WILL WARM A BIT MORE AND SOUTHWEST WINDS
WILL PICK UP IN THE AFTERNOON. HUMIDITIES WILL BE VERY LOW
TOMORROW AFTERNOON. THE WINDS WILL INCREASE SUNDAY AS THE FRONT
MOVES INTO NORTHERN UTAH AND HUMIDITIES WILL REMAIN VERY LOW WITH
NEAR CRITICAL FIRE WEATHER CONDITIONS POSSIBLE. THE FRONT WILL
CROSS THE FIRE SUNDAY NIGHT WITH WINDS SHIFTING TO NORTHEAST.
TEMPERATURES WILL COOL DOWN AND HUMIDITIES WILL INCREASE SOMEWHAT
BEHIND THE FRONT. DRY STABLE CONDITIONS ARE EXPECTED FOR MONDAY.

THE EXTENDED...ANOTHER TROUGH DEVELOPS ALONG THE WEST COAST
TUESDAY AND THIS WILL CAUSE SOUTHWEST WINDS TO INCREASE OVER YOUR
AREA BY TUESDAY AFTERNOON WITH GUSTS OF 25 TO 30 MPH. THE TROUGH
DOES NOT BRING THE ASSOCIATED COLD FRONT ACROSS THE FIRE UNTIL
THURSDAY AFTERNOON...SO EXPECT ANOTHER WINDY DAY ON WEDNESDAY WITH
GUSTS TO 35 OR 40 MPH POSSIBLE WITH POOR RH RECOVERY TUESDAY NIGHT
AND WEDNESDAY NIGHT. THIS FRONT WASHES OUT ON FRIDAY AND ANOTHER
TROUGH WILL BRING ANOTHER ROUND OF SOUTHWEST WINDS BUT NOT STRONG
WITH GUSTS IN THE 15 TO 25 MPH RANGE.

NO PRECIPITATION EXPECTED THROUGH THE PERIOD.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........6 ..HIGH.
  SKY/WEATHER.........CLEAR (0-10 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....57-60.
  MAX HUMIDITY........24-27 PERCENT.
  WINDS - 20-FOOT.....WEST WINDS 5 MPH GUSTING TO 15 MPH THIS EVENING
                      BECOMING DOWNSLOPE AFTER SUNSET.

.SATURDAY...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........SUNNY (0-10 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....80-82.
  MIN HUMIDITY........11-13 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST WINDS 15 TO 20 MPH.

.OUTLOOK FOR SUNDAY...
  LAL.................1.
  HAINES INDEX........6 ..HIGH.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....80.
  MIN HUMIDITY........14-16 PERCENT.
  WINDS - 20-FOOT.....WINDY. SOUTH WINDS 15 MPH INCREASING TO
                      SOUTHWEST 30 MPH WITH GUSTS TO AROUND 45 MPH
                      IN THE AFTERNOON.



FORECASTER...STRUTHWOLF
REQUESTED BY...RYAN MCCOLLIN
REASON FOR REQUEST...WILDFIRE
.TAG 20100903.TWITC.01/SLC

$$