FNUS75 KRIW 251318
FWSRIW

SPOT FORECAST FOR OLD FAITHFUL SP EVENT...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
718 AM MDT WED AUG 25 2010

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON AUGUST 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...HIGH PRESSURE SURFACE AND ALOFT WILL REMAIN OVER
YELLOWSTONE NATIONAL PARK TODAY WITH DRY...STABLE AND MILD CONDITIONS
WITH LIGHT WIND.

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

FORECASTER...C.BAKER

.TODAY...
SKY/WEATHER.........SUNNY (0-5 PERCENT).
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........15-18 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST 10
                    TO 13 MPH WITH HIGHER GUSTS IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.

.TONIGHT...
SKY/WEATHER.........CLEAR (0-5 PERCENT).
MIN TEMPERATURE.....AROUND 40.
MAX HUMIDITY........79-82 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 8 TO 12 MPH AND GUSTY.
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.

.THURSDAY...
SKY/WEATHER.........SUNNY (0-5 PERCENT) THEN BECOMING PARTLY CLOUDY
                    (30-40 PERCENT).
MAX TEMPERATURE.....81-84.
MIN HUMIDITY........11-14 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 10 TO 17 MPH. GUSTS UP TO 15
                    MPH INCREASING TO 25 MPH IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 40S. SOUTHWEST
WINDS AROUND 14 MPH.
.FRIDAY...NOT AS WARM. PARTLY CLOUDY WITH ISOLATED SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 70S.
SOUTHWEST WINDS AROUND 14 MPH.
.SATURDAY...PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 60S. WINDS GENERALLY
LESS THAN 10 MPH.
.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 30S. HIGHS IN THE MID 60S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...C.BAKER
REQUESTED BY...LAURA DOOLEY
REASON FOR REQUEST...PRESCRIBED
.TAG 20100825.OLDFA.01/RIW