FNUS75 KRIW 261940
FWSRIW

SPOT FORECAST FOR ANTELOPE...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
140 PM MDT SUN SEP 26 2010

FORECAST IS BASED ON REQUEST TIME OF 1326 MDT ON SEPTEMBER 26.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
WARM AND DRY CONDITIONS WILL REMAIN OVER THE FIRE FOR THE NEXT
COUPLE OF DAYS UNDER THE INFLUENCE OF AN AREA OF HIGH PRESSURE. A
FEW HIGH CLOUDS WILL BE POSSIBLE OVER THE FIRE LATE THIS
EVENING...BUT SHOULD DISSIPATE BY THE EARLY MORNING HOURS. THERE
WILL STILL BE ENOUGH CLEAR SKY TO POTENTIALLY CREATE A MORNING
INVERSION OVER THE FIRE FOR MONDAY MORNING. SHOULD AN INVERSION
DEVELOP...IT IS EXPECTED TO BREAK DURING THE MID TO LATE MORNING
HOURS. GENERALLY LIGHT WIND EXPECTED FOR THE NEXT COUPLE DAYS.


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

FORECASTER...BRANHAM

.REST OF TODAY...
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT).
MAX TEMPERATURE.....70-74.
MIN HUMIDITY........19-25 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 7 TO 12 MPH. GUSTS UP TO 25
                    MPH.
RIDGE TOP WINDS.....SOUTHWEST 13 TO 18 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4800-5700 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 18 TO 23 MPH.
SMOKE DISPERSAL.....GOOD (95400 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).
MIN TEMPERATURE.....38-42.
MAX HUMIDITY........59-64 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS AROUND 13 MPH AND GUSTY IN THE
                    EVENING BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH...DECREASING TO 10 TO 15
                    MPH AFTER 0100.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO 600-1600 FT AGL BY 0200.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH...DECREASING TO 10 TO 15
                    MPH AFTER 0100.
SMOKE DISPERSAL.....POOR TO FAIR (14500-58600 KNOT-FT).

.MONDAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....72-76.
MIN HUMIDITY........17-21 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 5 MPH SHIFTING TO THE
                    NORTHWEST AFTER 1300.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH...DECREASING TO 2 AFTER 1400.
MIXING HEIGHT.......1600-2600 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 7 MPH SHIFTING TO THE
                    NORTHWEST 7 TO 10 MPH AFTER 1300.
SMOKE DISPERSAL.....POOR (5400-19900 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.MONDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
.TUESDAY...MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. 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.

$$

FORECASTER...BRANHAM
REQUESTED BY...LAURA DOOLEY
REASON FOR REQUEST...WILDFIRE
.TAG 20100926.ANTEL.01/RIW