FNUS75 KRIW 081733
FWSRIW

SPOT FORECAST FOR FAN...YELLOWSTONE NATIONAL PARK
NATIONAL WEATHER SERVICE RIVERTON WY
1133 AM MDT WED AUG 8 2012

FORECAST IS BASED ON REQUEST TIME OF 1115 MDT ON AUGUST 08.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

INCREASING CLOUDS WITH AN ISOLATED DRY SHOWER OR THUNDERSTORM
POSSIBLE THIS AFTERNOON AND EVENING. A MORE ROBUST PUSH OF MID
LEVEL MOISTURE ARRIVES TOMORROW WITH WIDELY SCATTERED DRY
THUNDERSTORMS POSSIBLE IN THE AFTERNOON AND EVENING...WITH
SCATTERED WET AND DRY MIXED THUNDERSTORMS POSSIBLE ON FRIDAY. WIND
WILL BE MAINLY TERRAIN DRIVEN WITH OCCASIONAL STRONG AND ERRATIC
WINDS COMING FROM NEARBY SHOWERS AND THUNDERSTORMS.

...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS...
...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT...

FORECASTER...ALLEN

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (40-50 PERCENT). ISOLATED RAIN
                    SHOWERS AND THUNDERSTORMS AFTER 1500.
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........15-18 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
LAL.................1 UNTIL 1400...THEN 2.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5500-6500 FT AGL INCREASING TO 9900-10900 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 13 TO 17 MPH.
SMOKE DISPERSAL.....GOOD (77000 KNOT-FT) INCREASING TO EXCELLENT
                    (150500 KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT). ISOLATED
                    THUNDERSTORMS IN THE EVENING. ISOLATED RAIN
                    SHOWERS THROUGH THE NIGHT.
MIN TEMPERATURE.....53-56.
MAX HUMIDITY........49-52 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS AROUND 10 MPH WITH GUSTS TO
                    AROUND 15 MPH EARLY IN THE EVENING BECOMING
                    DOWNSLOPE/DOWNVALLEY 4-7 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    EVENING.
RIDGE TOP WINDS.....SOUTHWEST AROUND 20 MPH SHIFTING TO THE NORTH
                    LATE IN THE EVENING...THEN SHIFTING TO THE EAST
                    AFTER MIDNIGHT SHIFTING TO THE SOUTH EARLY IN
                    THE MORNING.
LAL.................2 UNTIL 2400...THEN 1.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......10100-11100 FT AGL DECREASING TO 6000-7000 FT
                    AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH SHIFTING TO THE NORTH
                    12 TO 14 MPH IN THE LATE EVENING AND EARLY
                    MORNING...THEN SHIFTING TO THE SOUTHEAST EARLY
                    IN THE MORNING.
SMOKE DISPERSAL.....VERY GOOD (143800 KNOT-FT) DECREASING TO GOOD
                    (61400 KNOT-FT) AFTER MIDNIGHT.

.THURSDAY...
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (60-70 PERCENT). WIDELY SCATTERED
                    RAIN SHOWERS AND DRY THUNDERSTORMS AFTER 1400.
MAX TEMPERATURE.....76-79.
MIN HUMIDITY........21-24 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH.
LAL.................1 UNTIL 1400...THEN 6.
CHC OF WETTING RAIN.9 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5500-6500 FT AGL INCREASING TO 8600-9600 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 9 TO 16 MPH BECOMING NORTH.
SMOKE DISPERSAL.....FAIR (50600 KNOT-FT) INCREASING TO VERY GOOD
                    (100900 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...PARTLY CLOUDY. SCATTERED SHOWERS AND DRY
THUNDERSTORMS IN THE EVENING...THEN ISOLATED SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 50S. WINDS GENERALLY LESS THAN
10 MPH.
.FRIDAY...PARTLY CLOUDY WITH SCATTERED SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 50S. HIGHS IN THE MID 70S. WINDS GENERALLY LESS
THAN 10 MPH.
.SATURDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE LOWER 70S.
WINDS GENERALLY LESS THAN 10 MPH.
.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE MID 70S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...ALLEN
REQUESTED BY...LAURA DOOLEY
REASON FOR REQUEST...WILDFIRE
.TAG 20120808.FAN__.01/RIW