FNUS75 KRIW 231939
FWSRIW

SPOT FORECAST FOR NORTH FORK...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
139 PM MDT MON AUG 23 2010

FORECAST IS BASED ON REQUEST TIME OF 1305 MDT ON AUGUST 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

WINDS WILL DIMINISH THIS EVENING BECOMING LIGHT. GOOD RADIATIONAL
COOLING WILL RESULT UNDER A CLEAR SKY...WITH SUBFREEZING
TEMPERATURES POSSIBLE...ESPECIALLY ALONG THE RIVER BOTTOM. TUESDAY
AND WEDNESDAY WILL BE WARM AND DRY...WITH RELATIVELY LIGHT WINDS. RH'S
WILL DROP TO 20 PERCENT TUESDAY...THEN INTO THE MID TEENS
WEDNESDAY. SOUTHWEST TO WEST WINDS WILL BEGIN TO INCREASE THURSDAY
INTO FRIDAY AS THE NEXT TROUGH MOVES THROUGH. THUNDERSTORMS RETURN
TO THE FORECAST ON FRIDAY.


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

FORECASTER...T.BAKER

.TONIGHT...
SKY/WEATHER.........CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....30-35...SOME UPPER 20S NEAR THE RIVER.
MAX HUMIDITY........55-60 PERCENT.
20 FOOT WINDS.......WEST TO NORTHWEST WINDS 5 TO 10 MPH AND GUSTING
                    TO 20 MPH...DIMINISHING AND BECOMING VARIABLE
                    2 TO 6 MPH AROUND 2100.
RIDGE TOP WINDS.....WEST TO NORTHWEST 10 MPH WITH GUSTS TO 25 MPH...SHIFTING
                    TO THE NORTH AND NORTHEAST AT 4 TO 8 MPH GUSTS TO 15 MPH
                    AROUND 2100...SHIFTING TO THE WEST AND DIMINISHING TO
                    3 TO 6 MPH AROUND MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......6000 FT AGL DECREASING TO 500 FT AGL
                    AFTER 2200.
TRANSPORT WINDS.....WEST TO NORTHWEST AROUND 15 MPH SHIFTING TO THE
                    NORTHEAST AT 10 MPH AROUND 2100...THEN SHIFTING
                    TO THE WEST AT 5 MPH AROUND MIDNIGHT.
SMOKE DISPERSAL.....GOOD (90000 KNOT-FT) DECREASING TO POOR (5000
                    KNOT-FT) AFTER 2100.

.TUESDAY...
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....65-68.
MIN HUMIDITY........19-24 PERCENT.
20 FOOT WINDS.......VARIABLE 2 TO 5 MPH...BECOMING UP SLOPE/UP VALLEY
                    4 TO 8 MPH GUSTS TO 15 MPH AROUND 1100.
RIDGE TOP WINDS.....VARIABLE 2 TO 5 MPH...BECOMING SOUTHEAST 4 TO 8 MPH
                    GUSTS TO 15 MPH AROUND 1100.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1000 FT AGL INCREASING TO 6000 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST 10 MPH.
SMOKE DISPERSAL.....POOR (10000 KNOT-FT) INCREASING TO GOOD (60000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.TUESDAY NIGHT...CLEAR. LOWS IN THE LOWER 40S. WINDS GENERALLY
LESS THAN 10 MPH.
.WEDNESDAY...CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER 70S.
WINDS GENERALLY LESS THAN 10 MPH.
.THURSDAY...MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE
LOWER 70S. WEST WINDS AROUND 11 MPH.
.FRIDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S.
SOUTHWEST WINDS AROUND 12 MPH.

$$

FORECASTER...T.BAKER
REQUESTED BY...GALEN ROESLER
REASON FOR REQUEST...WILDFIRE
.TAG 20100823.NORTH.01/RIW