FNUS75 KRIW 210942
FWSRIW

SPOT FORECAST FOR CYGNET...YELLOWSTONE NATIONAL PARK
NATIONAL WEATHER SERVICE RIVERTON WY
342 AM MDT FRI SEP 21 2012

FORECAST IS BASED ON REQUEST TIME OF 1834 MDT ON SEPTEMBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...DRY WEATHER IS FORECAST TODAY THROUGH SATURDAY.
WIND DIRECTION AND SPEED TODAY WILL BE SIMILAR TO THURSDAY.
TEMPERATURES WILL BE A TAD WARMER TODAY WITH MINIMUM RELATIVE
HUMIDITY NEAR OR SLIGHTLY LOWER THIS AFTERNOON. THE WIND ON
SATURDAY LOOKS TO REMAIN LIGHT. AGAIN HIGH TEMPERATURES A TAD
WARMER AND MINIMUM RELATIVE HUMIDITY A TAD DRIER THAN FRIDAY.
THE WEATHER SUNDAY LOOKS VERY SIMILAR TO WHAT IS FORECAST ON
SATURDAY. THE WIND ON SUNDAY AFTERNOON MAY BE A LITTLE HIGHER
AND FROM THE WEST SOUTHWEST.

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

FORECASTER...AR

.TODAY...
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....66-71.
MIN HUMIDITY........17-22 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY AT 4 TO 8 MPH UNTIL 1200.
                    WEST TO SOUTHWEST AT 5 TO 9 MPH AFTER 1200.

RIDGE TOP WINDS.....NORTH TO NORTHWEST AROUND 10 MPH UNTIL 1200.
                    WEST TO NORTHWEST 8 TO 12 MPH WITH GUSTS
                    AROUND 15 MPH AFTER 1200.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 5000-6000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....NORTH AROUND 10 MPH IN THE MORNING.
                    NORTHWEST AROUND 12 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR...BECOMING FAIR BY 1200...THEN FAIR TO GOOD
                    AFTER 1400.

.TONIGHT...
SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....31-36.
MAX HUMIDITY........75-80 PERCENT.
20 FOOT WINDS.......WEST TO NORTHWEST AT 4 TO 7 MPH UNTIL SUNSET...
                    THEN BECOMING DOWNSLOPE/DOWNVALLEY AT 4 TO 7 MPH.

RIDGE TOP WINDS.....WEST TO NORTHWEST AROUND 10 MPH UNTIL SUNSET.
                    THEN VARIABLE IN DIRECTION AT 5 TO 8 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO 1000-2000 FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH UNTIL 2100.
                    THEN VARIABLE IN DIRECTION AT 5 TO 10 MPH.
SMOKE DISPERSAL.....BECOMING FAIR AT SUNSET...THEN POOR BY MIDNIGHT.

.SATURDAY...
SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....68-73.
MIN HUMIDITY........15-20 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY AT 4 TO 7 MPH UNTIL 1200.
                    WEST TO SOUTHWEST AT 5 TO 9 MPH AFTER 1200.

RIDGE TOP WINDS.....SOUTH TO SOUTHWEST AT 5 TO 9 MPH UNTIL 1200.
                    WEST TO SOUTHWEST AT 8 TO 13 MPH AFTER 1200
                    WITH GUSTS AROUND 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 5500-6500 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH TO SOUTHWEST AT 5 TO 10 MPH IN THE MORNING.
                    WEST TO SOUTHWEST AROUND 10 MPH IN TH AFTERNOON.
SMOKE DISPERSAL.....POOR...BECOMING FAIR BY 1200...THEN FAIR TO GOOD
                    AFTER 1400.

.FORECAST DAYS 3 THROUGH 5...

.SATURDAY NIGHT...MOSTLY CLEAR. LOWS 30 TO 35.
DOWNSLOPE/DOWNVALLEY WIND GENERALLY AT 4 TO 7 MPH.

.SUNDAY...MOSTLY CLEAR. HIGHS 68 TO 73.
UPSLOPE/UPVALLEY WIND IN THE MORNING AT 4 TO 7 MPH.
WEST TO SOUTHWEST AT 5 TO 10 MPH IN THE AFTERNOON.

.MONDAY...INCREASING CLOUDS. SLIGHT CHANCE OF RAIN SHOWERS.
LOWS 35 TO 40.  HIGHS IN THE MID 60S.
WINDS GENERALLY LESS THAN 10 MPH.

.TUESDAY...MOSTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS.
LOWS NEAR 40.  HIGHS IN THE 50S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...ROSS
REQUESTED BY...KEITH KRAUSE
REASON FOR REQUEST...WILDFIRE
.TAG 20120920.CYGNE.01/RIW