FNUS75 KSLC 280459
FWSSLC

SPOT FORECAST FOR TWITCHELL CANYON
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1059 PM MDT FRI AUG 27 2010

.DISCUSSION...STRONG SOUTHWESTERLY WINDS WILL DEVELOP ACROSS THE
AREA DURING THE DAY SATURDAY...DOWNSTREAM FROM A STORM SYSTEM
DEVELOPING ACROSS THE GREAT BASIN. WIND GUSTS IN EXCESS OF 40 MPH
CAN BE EXPECTED IN THE LOWER ELEVATIONS OF THE BURN AREA DURING
THE AFTERNOON...WITH WINDS IN EXCESS OF 50 MPH ALONG THE UPPER
RIDGELINES. THESE WINDS WILL PERSIST INTO THE DAY SUNDAY ALTHOUGH
WEAKEN JUST A BIT. ADDITIONALLY THIS STRONG FLOW WILL HELP TO
SCOUR MOISTURE OUT OF THE AREA.

THIS STORM SYSTEM IS EXPECTED TO PASS THROUGH THE AREA SUNDAY
NIGHT RESULTING IN A COOLING TREND INTO THE EARLY PORTION OF THE
UPCOMING WEEK. A GENERALLY DRY WEST TO SOUTHWESTERLY FLOW IS
FORECAST TO SET UP DURING THE TUESDAY-WEDNESDAY TIMEFRAME BEFORE
HIGH PRESSURE REDEVELOPS FOR THE LATTER HALF OF THE WEEK. THIS
HIGH WILL RESULT IN A WARMING TREND FOR THE LATTER HALF OF THE
UPCOMING WEEK. WINDS WILL GENERALLY REMAIN LIGHT DURING THIS
PERIOD...AND DRIVEN BY SLOPE FLOWS.

.REST OF TONIGHT...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........MOSTLY CLEAR (25-35 PERCENT CLOUD COVER).
  CWR.................0 PERCENT.
  MIN TEMPERATURE.....8000 FEET....56-59.
                      10000 FEET...50-53
  MAX HUMIDITY........8000 FEET....67-70 PERCENT.
                      10000 FEET...77-80
  WINDS - 20-FOOT.....8000 FEET....SOUTH 10-15 MPH.
                      10000 FEET...SOUTHWEST 15-25 MPH

.SATURDAY...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT CLOUD COVER).
  CWR.................0 PERCENT.
  MAX TEMPERATURE.....8000 FEET....72-74.
                      10000 FEET...65-68
  MIN HUMIDITY........8000 FEET....27-30 PERCENT.
                      10000 FEET...32-35 PERCENT
  WINDS - 20-FOOT.....8000 FEET....SOUTH 10-15 MPH INCREASING TO
                                   20-30 MPH WITH GUSTS TO 45 MPH
                                   AFTER 1200.
                      10000 FEET...SOUTHWEST 25-35 MPH WITH GUSTS
                                   TO 55 MPH.

.OUTLOOK FOR SUNDAY...
  LAL.................1 UNTIL NOON...THEN 2.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT CLOUD COVER) THEN
                      BECOMING PARTLY CLOUDY (45-55 PERCENT CLOUD
                      COVER). A SLIGHT CHANCE OF SHOWERS AND
                      THUNDERSTORMS IN THE AFTERNOON.
  CWR.................5 PERCENT.
  MAX TEMPERATURE.....8000 FEET....NEAR 70.
                      10000 FEET...63-66
  MIN HUMIDITY........8000 FEET....20-23 PERCENT.
                      10000 FEET...22-25 PERCENT
  WINDS - 20-FOOT.....8000 FEET....SOUTHWEST 15-25 MPH WITH GUSTS
                                   TO 40 MPH.
                      10000 FEET...SOUTHWEST 20-30 MPH WITH GUSTS
                                   TO 50 MPH.

.OUTLOOK FOR MONDAY...
  LAL.................1 UNTIL NOON...THEN 2.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT CLOUD COVER) THEN
                      BECOMING PARTLY CLOUDY (45-55 PERCENT CLOUD
                      COVER). A SLIGHT CHANCE OF SHOWERS AND
                      THUNDERSTORMS IN THE AFTERNOON.
  CWR.................5 PERCENT.
  MAX TEMPERATURE.....8000 FEET....NEAR 70.
                      10000 FEET...63-66.
  MIN HUMIDITY........8000 FEET....18-21 PERCENT.
                      10000 FEET...20-23 PERCENT.
  WINDS - 20-FOOT.....8000 FEET....WEST-SOUTHWEST 8-15 MPH.
                      10000 FEET...WEST 10-20 MPH.

.OUTLOOK FOR TUESDAY...
  LAL.................1 UNTIL NOON...THEN 2.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT CLOUD COVER) THEN
                      BECOMING PARTLY CLOUDY (45-55 PERCENT CLOUD
                      COVER). A SLIGHT CHANCE OF SHOWERS AND
                      THUNDERSTORMS IN THE AFTERNOON.
  CWR.................5 PERCENT.
  MAX TEMPERATURE.....8000 FEET....71-74.
                      10000 FEET...65-68.
  MIN HUMIDITY........8000 FEET....20-23 PERCENT.
                      10000 FEET...25-28 PERCENT
  WINDS - 20-FOOT.....SOUTHWEST 6-12 MPH.
                      SOUTHWEST 8-15 MPH.





FORECASTER...SEAMAN
REQUESTED BY...JTEEPLES
REASON FOR REQUEST...WILDFIRE
.TAG 20100827.TWITC.01/SLC

$$