FNUS76 KSTO 200101
FWSSTO

SPOT FORECAST FOR SHASTA COLLEGE 3B...CAL FIRE/SHASTA COUNTY FIRE
NATIONAL WEATHER SERVICE SACRAMENTO CA
601 PM PDT FRI APR 19 2013

FORECAST IS BASED ON IGNITION TIME OF 0900 PDT ON APRIL 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
NORTHWEST FLOW ALOFT AHEAD OF BUILDING HIGH PRESSURE OVER THE
EASTERN PACIFIC WILL BRING WARM AND DRY CONDITIONS TO THE BURN
SITE TODAY (SATURDAY). NORTHERLY PRESSURE GRADIENTS INCREASING
SATURDAY MORNING WILL RESULT IN BREEZY AND GUSTY NORTHERLY WINDS
ONCE MIXING BEGINS AFTER 9 AM. PRESSURE GRADIENTS ARE EXPECTED TO
RELAX SOME DURING THE AFTERNOON WITH A SLIGHT DECREASE IN WINDS.


.TODAY (SATURDAY)...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....80-84.
MIN HUMIDITY........13-18 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....NORTH WINDS 5 TO 12 MPH BEFORE 9 AM...THEN
                    INCREASING TO 12 TO 18 MPH WITH LOCAL GUSTS UP
                    TO 25 MPH...DECREASING TO 10 TO 15 MPH AFTER
                    4 PM.
CWR.................0 PERCENT.
LAL.................1.
MIXING HEIGHT.......RISING TO 2500-3000 FT AGL LATE MORNING AND
                    AFTERNOON.
MIXING WINDS........NORTH UP TO 10 MPH BEFORE 9 AM...THEN NORTH
                    15 TO 20 MPH AFTER 9 AM...DECREASING TO 10 TO
                    15 MPH AFTER 4 PM.


FORECASTER...JHM
REQUESTED BY...TROY VELIN
REASON FOR REQUEST...PRESCRIBED
.TAG 20130420.SHAST.01/STO

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