FNUS75 KVEF 061601
FWSVEF

SPOT FORECAST FOR PORTAL PILES...US FOREST SERVICE
NATIONAL WEATHER SERVICE LAS VEGAS NV
802 AM PST MON FEB 6 2012

FORECAST IS BASED ON IGNITION TIME OF 0800 PST ON FEBRUARY 06.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...RIDGE OF HIGH PRESSURE OVER THE BURN SITE TODAY WILL
GIVE WAY TO A LOW PRESSURE SYSTEM MOVING TO OFF THE CALIFORNIA COAST
ON TUESDAY. THIS WILL RESULT IN INCREASING HIGH CLOUDS OVER THE SITE
TODAY WITH CLOUDS LOWERING OVERNIGHT...LEADING TO SNOW OVER THE AREA
LATE TUESDAY AND TUESDAY NIGHT. SNOW AMOUNTS ABOVE 7000 FEET ARE
EXPECTED TO BE LIGHT...GENERALLY 2 INCHES OF LESS...BUT HIGHER
AMOUNTS MAY BE SEEN ABOVE 9000 FEET. WINDS ALOFT WILL BE ON THE
INCREASE OVERNIGHT WITH 20 FOOT WINDS RESPONDING TUESDAY
AFTERNOON.


.TODAY...

SKY/WEATHER.........INCREASING HIGH CLOUDS.
MAX TEMPERATURE.....39-45.
MIN HUMIDITY........25-30 PERCENT.
  20 FT-10 MIN AVG..UPSLOPE/UPVALLEY 4 TO 8 MPH BECOMING SOUTHEAST
                    6 TO 7 MPH IN THE AFTERNOON.
  10K FT WIND.......LIGHT AND VARIABLE.
MIXING HEIGHT.......2500 FT AGL.
TRANSPORT WINDS.....LIGHT WINDS.
VENTILATION.........MARGINAL.

.TONIGHT...

SKY/WEATHER.........CLOUDY.
MIN TEMPERATURE.....24-29.
MAX HUMIDITY........62-67 PERCENT.
  20 FT-10 MIN AVG..SOUTH WINDS 6 TO 10 MPH.
  10K FT WIND.......SOUTH 7 TO 12 MPH INCREASING TO 19 TO 24 MPH
                    AFTER MIDNIGHT.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTH 6 TO 10 KNOTS AFTER
                    MIDNIGHT.
VENTILATION.........POOR IN THE EVENING...THEN BECOMING MARGINAL.

.TUESDAY...

SKY/WEATHER.........CLOUDY. SCATTERED SNOW IN THE AFTERNOON.
MAX TEMPERATURE.....34-39.
MIN HUMIDITY........41-46 PERCENT.
  20 FT-10 MIN AVG..SOUTH WINDS 6 TO 15 MPH.
  10K FT WIND.......SOUTH 24 TO 30 MPH.
MIXING HEIGHT.......2500 FT AGL.
TRANSPORT WINDS.....SOUTH 10 TO 18 KNOTS.
VENTILATION.........GOOD.

$$
FORECASTER...JENSEN
REQUESTED BY...OVICC
TYPE OF REQUEST...PRESCRIBED
.TAG 20120206.PORTA.01/VEF