FNUS75 KSLC 210402
FWSSLC

SPOT FORECAST FOR SUBWAY   WILDCAT FIRES
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1002 PM MDT FRI AUG 20 2010

.DISCUSSION...THE NEXT PACIFIC TROUGH AND ASSOCIATED COLD FRONT
WILL TRACK THROUGH THE GREAT BASIN OVER THE WEEKEND. AHEAD OF THE
FRONT SOUTH TO SOUTHWEST WINDS WILL TREND TO RAMP UP STARTING
LATE SATURDAY MORNING ACROSS BOTH THE SUBWAY AND WILDCAT FIRES.
PRECEDING THE INCREASE OF SOUTHWESTERLY WINDS...LOOKING FOR
MOSTLY DIURNALLY DRIVEN SLOPE FLOWS AT BOTH WILDFIRE SITES WITH
LIGHT NORTHWESTERLY DRAINAGE WINDS OVERNIGHT TONIGHT THROUGH MID
MORNING SATURDAY.

MOISTURE WILL TREND TO INCREASE IN SOUTHWESTERLY FLOW ALOFT
THROUGH THE WEEKEND AS WELL...BUT THREAT FOR CONVECTION LEADING
TO SHOWERS AND THUNDERSTORMS WILL NOT ARRIVE UNTIL SUNDAY. AT
THAT POINT SCATTERED SHOWERS AND THUNDERSTORMS WILL ONCE AGAIN BE
POSSIBLE BY SUNDAY AFTERNOON. IN THE MEANTIME LOOKING FOR GOOD RH
RECOVERY DURING THE OVERNIGHT HOURS...PRIMARILY DUE TO EXTENT OF
RECENT RAINFALL. SURFACE RH WILL TEND TO DRY ON SATURDAY DUE TO
THE INCREASE OF SOUTHWESTERLY WINDS HOWEVER. OVERNIGHT TRENDS IN
RH WILL TEND TO DRY SLIGHTLY SATURDAY NIGHT VS. TONIGHT.

.REST OF TONIGHT...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........CLEAR (0-10 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....51-54.
  MAX HUMIDITY........80-90 PERCENT.
  WINDS - 20-FOOT.....NORTHWEST WINDS 4 TO 7 MPH.

.SATURDAY...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT CLOUD COVER)
                      UNTIL NOON...THEN PARTLY CLOUDY (40-50
                      PERCENT CLOUD COVER).
  MAX TEMPERATURE.....84-86.
  MIN HUMIDITY........23-25 PERCENT.
  WINDS - 20-FOOT.....NORTH WINDS 5 MPH EARLY IN THE MORNING
                      BECOMING LIGHT AND VARIABLE...THEN BECOMING
                      SOUTHWEST 10 TO 15 MPH WITH GUSTS TO 20 MPH
                      IN THE AFTERNOON.

.OUTLOOK FOR SUNDAY...
  LAL.................2 UNTIL NOON...THEN 4.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT CLOUD COVER).
                      ISOLATED SHOWERS AND THUNDERSTORMS IN
                      THE MORNING...THEN SCATTERED SHOWERS AND
                      THUNDERSTORMS IN THE AFTERNOON.
  MAX TEMPERATURE.....80-82.
  MIN HUMIDITY........34-36 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST WINDS 10 TO 15 MPH.



FORECASTER...MERRILL
REQUESTED BY...TAIGA ROHRER
REASON FOR REQUEST...WILDFIRE
.TAG 20100820.SUBWA.01/SLC

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