FNUS75 KRIW 110243
FWSRIW

SPOT FORECAST FOR TRISCHMAN FIRE...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
843 PM MDT SAT SEP 10 2011

FORECAST IS BASED ON REQUEST TIME OF 2010 MDT ON SEPTEMBER 10.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...MOISTURE WILL BEGIN MOVING NORTH TONIGHT INTO SUNDAY LEADING
TO VERY ISOLATED SHOWERS AND THUNDERSTORMS IN THE FIRE AREA BY BY LATE
SUNDAY AFTERNOON. ANY STORMS WILL THEN WEAKEN ON MONDAY MORNING...WITH THE
RETURN OF ISOLATED SHOWERS AND THUNDERSTORMS DURING THE AFTERNOON HOURS MONDAY
AND TUESDAY. TEMPERATURES WILL COOL SLOWLY FOR THE NEXT SEVERAL DAYS.

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

FORECASTER...LIPSON

.REST OF TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).
MIN TEMPERATURE.....33.
MAX HUMIDITY........78 PERCENT.
20 FOOT WINDS.......SOUTH 1-3 MPH.
RIDGE TOP WINDS.....EAST 10 TO 15 MPH SHIFTING TO THE SOUTH AFTER
                    MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......6800-7800 FT AGL DECREASING TO 3500-4000 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHEAST 6 TO 14 MPH.
SMOKE DISPERSAL.....POOR TO FAIR (24200-40400 KNOT-FT).

.SUNDAY...
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (45-55 PERCENT). VERY ISOLATED SHOWERS
                    AND THUNDERSTORMS AFTER 1700.
MAX TEMPERATURE.....AROUND 66.
MIN HUMIDITY........29 PERCENT.
20 FOOT WINDS.......SOUTH 1 TO 3 MPH UNTIL 0700. CALM FROM 0700 TO 1000.
                    NORTH OFF THE WATER 3 TO 5 MPH AFTER 1000. BETWEEN
                    1030 AND 1330 NORTHWEST 5 TO 10 MPH.
                    THEN NORTH OFF THE WATER AT 3 TO 5 MPH AFTER 1330.GUSTY
                    AND ERRATIC WINDS EXPECTED NEAR ANY SHOWERS OR THUNDERSTORMS
                    IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH SHIFTING TO THE WEST
                    AROUND 20 MPH LATE IN THE AFTERNOON.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4900-5900 FT AGL INCREASING TO 7700-8700 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH 6 TO 8 MPH SHIFTING TO THE WEST 12 TO 14
                    MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR TO GOOD (33300-78900 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS
IN THE EVENING...THEN ISOLATED SHOWERS AFTER MIDNIGHT. LOWS IN
THE MID 30S. WINDS GENERALLY LESS THAN 10 MPH.
.MONDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 30S. HIGHS IN THE UPPER 60S. WINDS GENERALLY
LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS...
THUNDERSTORMS AND SNOW SHOWERS. LOWS IN THE MID 30S. HIGHS IN THE
MID 60S. WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS...THUNDERSTORMS
AND SLIGHT CHANCE OF SNOW SHOWERS. LOWS IN THE LOWER 30S. HIGHS
IN THE LOWER 60S. WINDS GENERALLY LESS THAN 10 MPH.
.THURSDAY...MOSTLY CLEAR. LOWS IN THE LOWER 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...ED FOLTS
REASON FOR REQUEST...WILDFIRE
.TAG 20110910.TRISC.01/RIW