FNUS75 KFGZ 151023
FWSFGZ

SPOT FORECAST FOR WALLA VALLEY RX...GNP GRAND CANYON NP
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
323 AM MST FRI OCT 15 2010

FORECAST IS BASED ON IGNITION TIME OF 1100 MST ON OCTOBER 15.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...HIGH PRESSURE OVER TEXAS AND A WEAK LOW PRESSURE CENTER
OVER BAJA CALIFORNIA WILL BRING INCREASING MOISTURE AND AFTERNOON
CLOUD COVER TO THE WALLA VALLEY RX. IN ADDITION...THERE WILL BE A SLIGHT
CHANCE OF AFTERNOON SHOWERS AND THUNDERSTORMS THROUGH SATURDAY. ANY STORMS
OR SHOWERS WILL BE RELATIVELY HIGH BASED AND CAPABLE OF PRODUCING LOCAL
WIND GUSTS OF 30 TO 40 MPH. OTHERWISE...WARM TEMPERATURES WILL CONTINUE
WITH JUST A SLIGHT INCREASE IN AFTERNOON WIND SPEEDS ON SATURDAY.

.TODAY...

SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF THUNDERSTORMS
                    IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 67.
MIN HUMIDITY........27 PCT.
WINDS (20 FT).......DOWNSLOPE WINDS 1 TO 2 MPH UNTIL 1000 LST BECOMING
                    WEST AROUND 5 MPH IN THE AFTERNOON.
LAL.................2.
HAINES INDEX........3 VERY LOW.
MAX VENT RATE.......GOOD (48700 KNOT-FT).
CLEARING INDEX......487.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF THUNDERSTORMS
                    IN THE EVENING.
MIN TEMPERATURE.....AROUND 32.
MAX HUMIDITY........75 PCT.
WINDS (20 FT).......SOUTHWEST WINDS AROUND 5 MPH IN THE EVENING
                    BECOMING DOWNSLOPE 1 TO 2 MPH AFTER 2100 LST.
MIN VENT RATE.......POOR (800 KNOT-FT).
CLEARING INDEX......8.

.SATURDAY...

SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF
                    THUNDERSTORMS.
MAX TEMPERATURE.....AROUND 65.
MIN HUMIDITY........28 PCT.
WINDS (20 FT).......LIGHT WINDS BECOMING SOUTHWEST 5 TO 10 MPH IN
                    THE AFTERNOON.
LAL.................2.
HAINES INDEX........4 LOW.
MAX VENT RATE.......FAIR (33900 KNOT-FT).
CLEARING INDEX......339.

$$
FORECASTER...MCCOLLUM
REQUESTED BY...KATE MILICH
REASON FOR REQUEST...PRESCRIBED
.TAG 20101015.WALLA.01/FGZ