FNUS75 KTWC 091550
FWSTWC

SPOT FORECAST FOR BONANZA...AZ-ASF
NATIONAL WEATHER SERVICE TUCSON AZ
850 AM MST THU AUG 9 2012

FORECAST IS BASED ON IGNITION TIME OF 0855 MST ON AUGUST 09.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...DRIER AIR IN THE UPPER ATMOSPHERE IS MOVING INTO
THE BURN AREA FROM FROM NEW MEXICO. THIS DRIER AIR WILL WORK ITS
WAY DOWN TO THE SURFACE STARTING AROUND 11 AM. BETWEEN 11 AM AND 1
PM...SURFACE DEW POINT VALUES WILL FALL TO AROUND 35 DEGREES
WHICH WILL COMBINE WITH AFTERNOON MAX TEMPERATURES IN THE LOW 80S TO
PRODUCE MINIMUM RELATIVE HUMIDITY VALUES IN THE 12 TO 17 PERCENT
RANGE. THESE DRIER CONDITIONS WILL PERSIST THROUGH FRIDAY
ALTHOUGH HUMIDITY VALUES WILL RECOVER OVERNIGHT TO AROUND 40
PERCENT. ON FRIDAY...WARMER TEMPERATURES ARE EXPECTED WHICH WILL
DRIVE DOWN HUMIDITY VALUES TO NEAR 10 PERCENT. AN ISOLATED
THUNDERSTORM IS STILL POSSIBLE THIS AFTERNOON AND AGAIN
FRIDAY...BUT IN GENERAL THE POTENTIAL FOR STORMS IS LIMITED DUE TO
THE DRIER AIR. ALSO...WIND SPEEDS SHOULD REMAIN LIGHT FOLLOWING
NORMAL DIURNAL TRENDS UNLESS THUNDERSTORMS ARE PRESENT.

.TODAY...

SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
                    SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
MAX TEMPERATURE.....80 TO 85 DEGS.
MIN HUMIDITY........12 TO 17 PCT.
20-FOOT WINDS.......SOUTHEAST 5 TO 8 MPH.
LAL.................2.
CHANCE OF RAIN......20 PERCENT.
HAINES INDEX........4 LOW.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
MIN TEMPERATURE.....57 TO 62 DEGS.
MAX HUMIDITY........39 TO 44 PCT.
20-FOOT WINDS.......SOUTHEAST 5 TO 6 MPH.
LAL.................1.
CHANCE OF RAIN......10 PERCENT.
HAINES INDEX........5 MODERATE.

.FRIDAY...

SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND
                    THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....84 TO 89 DEGS.
MIN HUMIDITY........9 TO 14 PCT.
20-FOOT WINDS.......SOUTH 5 TO 13 MPH. GUSTS UP TO 25 MPH IN THE
                    AFTERNOON.
LAL.................2.
HAINES INDEX........4 LOW.

$$
FORECASTER...FIRE WEATHER FORECASTER
REQUESTED BY...JENNIFER PLUMB
TYPE OF REQUEST...PRESCRIBED
.TAG 20120809.BONAN.01/TWC