FNUS75 KFGZ 311203
FWSFGZ

SPOT FORECAST FOR RANGE RX...GNP GRAND CANYON NP
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
503 AM MST WED OCT 31 2012

FORECAST IS BASED ON IGNITION TIME OF 0900 MST ON OCTOBER 31.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
VERY DRY CONDITIONS WILL CONTINUE AT THIS BURN SITE FOR THIS FORECAST
PERIOD. HIGH PRESSURE ALOFT CROSSING NORTHERN ARIZONA TODAY WILL
MEAN A STABLE AIRMASS WITH LIGHT MIXING LAYER WINDS AND ONLY A FEW
HOURS OF GOOD VENTILATION RATES THIS AFTERNOON. SOUTHWEST FLOW
ALOFT RETURNS FOR THURSDAY ALONG WITH THICKENING CIRRUS CLOUDS.

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 64.
MIN HUMIDITY........10 PCT.
WINDS (20 FT).......VARIABLE WINDS TO 5 MPH THROUGH 1230L...BECOMING
x09x09    SOUTH SOUTHWEST 5 TO 8 MPH.
LAL.................1.
HAINES INDEX........4 LOW.
MAX VENT RATE.......GOOD (46000 KNOT-FT).
CLEARING INDEX......460.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....AROUND 32.
MAX HUMIDITY........46 PCT.
WINDS (20 FT).......LIGHT WINDS.
MIN VENT RATE.......POOR (3600 KNOT-FT).
CLEARING INDEX......36.

.THURSDAY...

SKY/WEATHER.........PARTLY CLOUDY...THEN BECOMING MOSTLY CLOUDY.
MAX TEMPERATURE.....AROUND 64.
MIN HUMIDITY........15 PCT.
WINDS (20 FT).......SOUTHWEST WINDS 5 TO 10 MPH THROUGH 1000L...
                    INCREASING TO 10 TO 15 MPH WITH GUSTS TO 30 MPH.
LAL.................1.
HAINES INDEX........3 VERY LOW.
MAX VENT RATE.......GOOD (61600 KNOT-FT).
CLEARING INDEX......616.

$$
FORECASTER...41
REQUESTED BY...DAVE ROBINSON
REASON FOR REQUEST...PRESCRIBED
.TAG 20121031.RANGE.01/FGZ