FNUS75 KRIW 151938
FWSRIW

SPOT FORECAST FOR ANTELOPE...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
138 PM MDT WED SEP 15 2010

FORECAST IS BASED ON REQUEST TIME OF 1319 MDT ON SEPTEMBER 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
GENERALLY DRY CONDITIONS EXPECTED OVER THE FIRE TONIGHT AND
TOMORROW AS HIGH PRESSURE REMAINS OVER THE AREA. WESTERLY WIND
WILL INCREASE OVER THE FIRE THIS EVENING...AND WILL LINGER
THROUGH MUCH OF THE DAY ON THURSDAY. UNDER THE CURRENT
SYSTEM...TEMPERATURES WILL WARM WITH HUMIDITY DECREASING INTO THE
LOW 20 PERCENT RANGE BY THURSDAY AFTERNOON. THE COMBINATION OF
ELEVATED WIND AND LOWERED HUMIDITY MAY ELEVATE FIRE GROWTH
THURSDAY...BUT THESE LEVELS ARE NOT BE CONSIDERED CRITICAL.


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

FORECASTER...BRANHAM

.TODAY...
SKY/WEATHER.........MOSTLY CLEAR TO PARTLY CLOUDY (20-40 PERCENT).
MAX TEMPERATURE.....66-70.
MIN HUMIDITY........26-29 PERCENT.
20 FOOT WINDS.......LIGHT AND VARIABLE BECOMING WEST AT 10 TO 15
                    MPH WITH HIGHER GUSTS AFTER 1500.
RIDGE TOP WINDS.....WEST AT 10 TO 15 MPH...INCREASING TO AROUND 20
                    MPH AFTER 1500.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 7100-8100 FT AGL AFTER 1400.
TRANSPORT WINDS.....WEST 15 TO 20 MPH.
SMOKE DISPERSAL.....INCREASING TO VERY GOOD (117700 KNOT-FT)
                    AFTER 1500.

.TONIGHT...
SKY/WEATHER.........CLEAR (0-10 PERCENT).
MIN TEMPERATURE.....32-35.
MAX HUMIDITY........91-94 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO
                    AROUND 25 MPH.
RIDGE TOP WINDS.....SOUTHWEST 20 TO 25 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........INCREASING TO 4 OR LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH AFTER 0400.
MIXING HEIGHT.......DECREASING TO 1400-2400 FT AGL BY 0200.
TRANSPORT WINDS.....SOUTHWEST 20 TO 25 MPH.
SMOKE DISPERSAL.....VERY GOOD (121400 KNOT-FT) DECREASING TO POOR
                    (36400 KNOT-FT) AFTER 0100.

.THURSDAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....69-73.
MIN HUMIDITY........18-23 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 15 TO 20 MPH WITH GUSTS TO
                    AROUND 30 MPH.
RIDGE TOP WINDS.....SOUTHWEST 20 TO 25 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH...DECREASING TO 3 AFTER 1000.
MIXING HEIGHT.......INCREASING TO 7300-8300 FT AGL AFTER 1400.
TRANSPORT WINDS.....SOUTHWEST 25 TO 30 MPH.
SMOKE DISPERSAL.....GOOD (72200 KNOT-FT) INCREASING TO EXCELLENT
                    (173100 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 30S. SOUTHWEST
WINDS AROUND 10 MPH.
.FRIDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS. LOWS IN THE UPPER
30S. HIGHS IN THE UPPER 60S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS IN
THE UPPER 30S. HIGHS IN THE LOWER 70S. SOUTH WINDS AROUND 11 MPH.
.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS IN
THE MID 30S. HIGHS IN THE UPPER 60S. WINDS GENERALLY LESS THAN
10 MPH.

$$

FORECASTER...BRANHAM
REQUESTED BY...LAURA DOOLEY
REASON FOR REQUEST...WILDFIRE
.TAG 20100915.ANTEL.01/RIW