FNUS75 KRIW 241345
FWSRIW

SPOT FORECAST FOR OLD FAITHFU SP EVENT...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
745 AM MDT TUE AUG 24 2010

FORECAST IS BASED ON IGNITION TIME OF 0740 MDT ON AUGUST 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...HIGH PRESSURE SURFACE AND ALOFT WILL BE OVER YELLOWSTONE
NATIONAL PARK TODAY AND WEDNESDAY WITH STABLE...DRY CONDITIONS.  COLD
NIGHTS AND MILD DAY TIME TEMPERATURES ARE EXPECTED WITH RELATIVELY LIGHT
WINDS.

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

FORECASTER...C.BAKER

.TODAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....72-75.
MIN HUMIDITY........17-20 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH SHIFTING TO THE WEST LATE
                    IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2200-3200 FT AGL INCREASING TO 5700-6700 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH 12 TO 13 MPH SHIFTING TO THE WEST AROUND
                    15 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....BECOMING GOOD BY NOON (25800-74500 KNOT-FT).

.WEDNESDAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........13-16 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST
                    AROUND 11 MPH WITH HIGHER GUSTS LATE IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2100-3100 FT AGL INCREASING TO 5500-6500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 14 TO 20 MPH.
SMOKE DISPERSAL.....POOR (31100 KNOT-FT) INCREASING TO GOOD (89800
                    KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...CLEAR. LOWS IN THE UPPER 30S. WINDS GENERALLY
LESS THAN 10 MPH.
.THURSDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE
LOWER 80S. SOUTHWEST WINDS AROUND 10 MPH.
.FRIDAY...NOT AS WARM. PARTLY CLOUDY WITH SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE
LOWER 70S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 70S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...C.BAKER
REQUESTED BY...LAURA DOOLEY
REASON FOR REQUEST...PRESCRIBED
.TAG 20100824.OLDFA.01/RIW