FNUS75 KSLC 212014
FWSSLC

SPOT FORECAST FOR MACHINE GUN
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
213 PM MDT TUE SEP 21 2010

...RED FLAG WARNING FROM NOON TODAY TO 9 PM MDT THIS EVENING...
...FIRE WEATHER WATCH FROM 9 AM TO 9 PM MDT WEDNESDAY...

.DISCUSSION...A DRY AND INCREASINGLY STRONG SOUTHWEST FLOW ALOFT WILL
EXIST AT THE FIRE SITE THROUGH WEDNESDAY MORNING. SOUTHERLY SURFACE
WINDS THAT DEVELOPED EARLY THIS AFTERNOON WILL CONTINUE THROUGH MID-
EVENING...THEN DECREASE GRADUALLY BEGINNING LATE THIS EVENING.
HUMIDITIES VALUES WILL ONLY SHOW MODEST RECOVERIES OVERNIGHT.

MOISTURE SURGING NORTH THROUGH ARIZONA TODAY WILL MOVE QUICKLY
THROUGH SOUTHERN...CENTRAL AND EASTERN UTAH TONIGHT. THE FIRE SITE
WILL SIT ON THE WESTERN EDGE OF THE MOISTURE WEDNESDAY. SHOWERS AND
THUNDERSTORMS ARE POSSIBLE OVER/NEAR THE FIRE SITE DURING THE
AFTERNOON...WITH LIGHTNING AND GUSTY ERRATIC WINDS THE MAIN
WEATHER CONCERN. WINDS WILL ALSO SHIFT TO A MORE WESTERLY DIRECTION
WEDNESDAY AFTERNOON AS AN UPPER LEVEL TROUGH PASSES THROUGH THE FIRE
SITE. A COOLER AND MORE STABLE AIRMASS WILL SETTLE INTO THE AREA
ON THURSDAY.


.REST OF THIS AFTERNOON...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........SUNNY (0-5 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....77-79.
  MIN HUMIDITY........14-16 PERCENT.
  WINDS - 20-FOOT.....SOUTH 15 TO 20 MPH WITH GUSTS TO 32 MPH.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  SKY/WEATHER.........CLEAR (5-10 PERCENT CLOUD COVER) UNTIL
                      MIDNIGHT...THEN PARTLY CLOUDY (30-40 PERCENT
                      CLOUD COVER).
  MIN TEMPERATURE.....56-58.
  MAX HUMIDITY........37-39 PERCENT.
  WINDS - 20-FOOT.....SOUTH WINDS 15 TO 20 MPH WITH GUSTS TO 28 MPH
                      ...DECREASING TO 10 TO 15 MPH AFTER 0100.

.OUTLOOK FOR WEDNESDAY...
  LAL.................1 UNTIL 1300...THEN 2.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT CLOUD COVER)
                      UNTIL 1000...THEN BECOMING MOSTLY CLOUDY (65-75
                      PERCENT CLOUD COVER). A SLIGHT CHANCE OF
                      SHOWERS AND THUNDERSTORMS AFTER 1300.
  MAX TEMPERATURE.....74-77.
  MIN HUMIDITY........22-25 PERCENT.
  WINDS - 20-FOOT.....SOUTH WINDS 14 TO 18 MPH...GUSTS TO 32 MPH
                      UNTIL 1400...THEN SHIFT TO THE WEST 12 TO 18
                      MPH WITH GUSTS TO 25 MPH. GUSTY AND ERRATIC
                      WINDS WITH SHOWERS AND THUNDERSTORMS.

FORECASTER...CONGER
REQUESTED BY...Mike Mattfeldt  SITL
REASON FOR REQUEST...WILDFIRE
.TAG 20100921.MACHI.01/SLC

$$