FNUS75 KRIW 011004
FWSRIW

SPOT FORECAST FOR CYGNET FIRE...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
404 AM MDT SAT SEP 1 2012

FORECAST IS BASED ON REQUEST TIME OF 1929 MDT ON AUGUST 31.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
OCCASIONAL SHOWERS AND A FEW THUNDERSTORMS ARE EXPECTED THROUGH
THIS EVENING. THERE WILL LIKELY BE A BREAK FOR A COUPLE HOURS THIS
MORNING BUT BUILDING SHOWERS AND THUNDERSTORMS WILL RETURN QUICKLY BY LATER
IN THE MORNING OR EARLY AFTERNOON. THERE IS A HIGH PROBABILITY OF
MORE WETTING RAINS TODAY INTO THIS EVENING. SHOWERS WILL GRADUALLY
END LATER TONIGHT BRINGING ABOUT A DRY SUNDAY EXCEPT FOR A SLIGHT
CHANCE OF A SHOWER OVER THE HIGHER MOUNTAINS TO THE EAST.


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

FORECASTER...SKRBAC

.TODAY...
SKY/WEATHER.........CLOUDY (90-100 PERCENT). ISOLATED THUNDERSTORMS
                    IN THE MORNING. NUMEROUS RAIN SHOWERS THROUGH
                    THE DAY. SCATTERED THUNDERSTORMS IN THE
                    AFTERNOON.
MAX TEMPERATURE.....60-64.
MIN HUMIDITY........48-51 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTH
                    8 TO 10 MPH IN THE AFTERNOON WITH GUSTS UP TO 15
                    MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST 20 TO 25 MPH.
LAL.................2 UNTIL 1200...THEN 4.
CHC OF WETTING RAIN.60 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3700-4700 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.
SMOKE DISPERSAL.....GOOD (64600-90000 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (50-60 PERCENT). NUMEROUS RAIN
                    SHOWERS AND ISOLATED THUNDERSTORMS IN THE EVENING.
                    ISOLATED RAIN SHOWERS AFTER MIDNIGHT.
MIN TEMPERATURE.....36-39.
MAX HUMIDITY........86-89 PERCENT.
20 FOOT WINDS.......SOUTH WINDS 8 TO 10 MPH UNTIL EARLY MORNING
                    BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH. GUSTS UP
                    TO 15 MPH. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
LAL.................2.
CHC OF WETTING RAIN.30 PERCENT IN THE EARLY EVENING.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2500-3000 FT AGL...DECREASING TO 500-1000 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 13 TO 18 MPH.
SMOKE DISPERSAL.....FAIR EARLY IN THE EVENING (48200 KNOT-FT)...THEN
                    POOR (10000-15000 KNOT-FT).

.SUNDAY...
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (45-55 PERCENT).
MAX TEMPERATURE.....64-67.
MIN HUMIDITY........20-23 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST 8
                    TO 11 MPH WITH GUSTS TO AROUND 16 MPH IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH INCREASING TO AROUND 25
                    MPH LATE IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......2500-3000 FT AGL INCREASING TO 4500-5000 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.
SMOKE DISPERSAL.....GOOD (65000-95000 KNOT-FT).

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

$$

FORECASTER...SKRBAC
REQUESTED BY...M  HEANEY
REASON FOR REQUEST...WILDFIRE
.TAG 20120831.CYGNE.01/RIW