FNUS75 KRIW 191100
FWSRIW

SPOT FORECAST FOR ANTELOPE FIRE...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
500 AM MDT SUN SEP 19 2010

FORECAST IS BASED ON REQUEST TIME OF 0003 MDT ON SEPTEMBER 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

THE INVERSION IS EXPECTED TO LIFT BETWEEN 10 AM AND NOON...WITH
BREEZY SOUTHWEST WINDS DEVELOPING AROUND MIDDAY.  SUNNY AND
UNSEASONABLY WARM CONDITIONS WILL OCCUR TODAY...WITH VERY LOW
RELATIVE HUMIDITY. AN APPROACHING TROUGH WILL INCREASE CLOUDS
TONIGHT...WITH THE ASSOCIATED COLD FRONT PUSHING ACROSS THE AREA
LATE TONIGHT INTO MONDAY MORNING.  MUCH COOLER TEMPERATURES AND MUCH
HIGHER RELATIVE HUMIDITY WILL OCCUR MONDAY...WITH A CHANCE OF SOME
RAIN...BUT CHANCES OF A WETTING RAIN REMAINS LOW AT THIS TIME.

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

FORECASTER...MURRELL

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (15 PERCENT).
MAX TEMPERATURE.....74-78.
MIN HUMIDITY........14-18 PERCENT.
20 FOOT WINDS.......VARIABLE 3-6 MPH...BECOMING SOUTHWEST 12-18 MPH
                    AROUND NOON. GUSTS 25-30 MPH IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTH 10 TO 15 MPH SHIFTING TO THE SOUTHWEST
                    AROUND 20 MPH AROUND NOON. GUSTS TO 35 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1300 FT AGL INCREASING TO 9400 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 20 TO 30 MPH.
SMOKE DISPERSAL.....POOR (34100 KNOT-FT) INCREASING TO
                    EXCELLENT (243800 KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT). ISOLATED RAIN
                    SHOWERS AFTER MIDNIGHT.
MIN TEMPERATURE.....40-45
MAX HUMIDITY........AROUND 60 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH...DECREASING TO
                    4-8 MPH BY 2100. GUSTS UP TO 25 MPH IN THE
                    EVENING.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH SHIFTING TO THE SOUTH
                    10-15 MPH BY 2000.
LAL.................1.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4900-5900 FT AGL DECREASING TO 800 FT AGL BY
                    MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH SHIFTING TO THE SOUTH
                    10-15 MPH BY 2000.
SMOKE DISPERSAL.....VERY GOOD (147800 KNOT-FT) DECREASING TO POOR
                    (13200 KNOT-FT) BY 2100.

.MONDAY...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SCATTERED RAIN
                    SHOWERS THROUGH THE DAY. ISOLATED THUNDERSTORMS
                    IN THE AFTERNOON.
MAX TEMPERATURE.....58-62.
MIN HUMIDITY........40-45 PERCENT.
20 FOOT WINDS.......SOUTHWEST 5-10 MPH...BECOMING WEST AROUND NOON.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 10-15 MPH...BECOMING WEST AROUND NOON.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.15 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3500 FT AGL INCREASING TO 6000 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 10-15 MPH...BECOMING WEST AROUND NOON.
SMOKE DISPERSAL.....GOOD.

.FORECAST DAYS 3 THROUGH 5...
.MONDAY NIGHT...MOSTLY CLOUDY. SCATTERED SHOWERS IN THE EVENING...
THEN ISOLATED SNOW SHOWERS AFTER MIDNIGHT. LOWS AROUND 30. WINDS
GENERALLY LESS THAN 10 MPH.

.TUESDAY...PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN THE
LOWER 60S. WINDS GENERALLY LESS THAN 10 MPH.

.WEDNESDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE MID 60S. WINDS
GENERALLY LESS THAN 10 MPH.

.THURSDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS IN
THE LOWER 30S. HIGHS IN THE UPPER 50S. WINDS GENERALLY LESS THAN
10 MPH.

$$

FORECASTER...MURRELL
REQUESTED BY...EDWIN FOLTS
REASON FOR REQUEST...WILDFIRE
.TAG 20100919.ANTEL.01/RIW