FNUS75 KRIW 271022
FWSRIW

SPOT FORECAST FOR ANTELOPE...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
422 AM MDT MON SEP 27 2010

FORECAST IS BASED ON REQUEST TIME OF 2035 MDT ON SEPTEMBER 26.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...AN UPPER RIDGE OF HIGH PRESSURE...DRY AND WARM
CONDITIONS...WILL CONTINUE TO PREVAIL OVER THE NEXT SEVERAL DAYS.
LITTLE OR NO TREND IN TEMPERATURE AND RELATIVE HUMIDITY IS EXPECTED
TODAY FROM SUNDAY. WINDS WILL REMAIN LIGHT. TUESDAY WILL SEE A
TREND TOWARD WARMER AND DRIER CONDITIONS WITH GUSTY WEST SOUTHWEST
BREEZES IN THE AFTERNOON. A COLD FRONT WILL PUSH SOUTH ACROSS
MONTANA INTO THE NORTHERN PORTION OF THE PARK LATE TUESDAY NIGHT
WITH SLIGHTLY COOLER CONDITIONS EXPECTED WEDNESDAY ALONG WITH
LIGHT WIND.

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

FORECASTER...MEUNIER

.TODAY...
SKY/WEATHER.........VARIABLE HIGH CLOUDS IN THE MORNING (30-50 PERCENT).
                    SUNNY IN THE AFTERNOON (0-10 PERCENT).
MAX TEMPERATURE.....66-70.
MIN HUMIDITY........17-20 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY OR SOUTH 4-7 MPH THIS MORNING
                    BECOMING WEST SOUTHWEST 5-9 MPH WITH GUSTS
                    TO 15 MPH BETWEEN 1300 AND 1500.
RIDGE TOP WINDS.....WEST SOUTHWEST 5 TO 10 MPH.

LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

MIXING HEIGHT.......1000-2000 FT AGL INCREASING TO 4000-5000 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST SOUTHWEST AROUND 5 MPH IN THE MORNING
                    INCREASING TO AROUND 10 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (5400-19900 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....39-42.
MAX HUMIDITY........67-70 PERCENT.

20 FOOT WINDS.......WEST SOUTHWEST 5-10 MPH THROUGH SUNSET THEN BECOMING
                    DOWNSLOPE/DOWNVALLEY OR SOUTH 4-7 MPH.
RIDGE TOP WINDS.....WEST SOUTHWEST 10 TO 15 MPH.

LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......2600-3600 FT AGL DECREASING TO 300 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.
SMOKE DISPERSAL.....POOR (10500-23700 KNOT-FT).

.TUESDAY...
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....68-72.
MIN HUMIDITY........16-19 PERCENT.

20 FOOT WINDS.......UPSLOPE/UPVALLEY OR SOUTH 4-7 MPH IN THE MORNING
                    BECOMING WEST SOUTHWEST 8 TO 13 MPH WITH GUSTS
                    TO 20 MPH BETWEEN 1300 AND 1500.
RIDGE TOP WINDS.....WEST SOUTHWEST 15 TO 20 MPH.

LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

MIXING HEIGHT.......1900-2900 FT AGL INCREASING TO 4800-5800 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 20 MPH.
SMOKE DISPERSAL.....POOR TO GOOD (33400-73200 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.TUESDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 30S. WINDS
GENERALLY LESS THAN 10 MPH.

.WEDNESDAY...MOSTLY CLEAR. LOWS AROUND 40. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.

.THURSDAY...CLEAR. LOWS AROUND 40. HIGHS IN THE MID 60S. WINDS
GENERALLY LESS THAN 10 MPH.

.FRIDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...LAURA DOOLEY
REASON FOR REQUEST...WILDFIRE
.TAG 20100926.ANTEL.02/RIW