FNUS75 KRIW 251009
FWSRIW

SPOT FORECAST FOR GRAVEL...IA TDC
NATIONAL WEATHER SERVICE RIVERTON WY
409 AM MDT WED AUG 25 2010

FORECAST IS BASED ON REQUEST TIME OF 1542 MDT ON AUGUST 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

DRY AND WARM CONDITIONS WILL CONTINUE TODAY AND THURSDAY. WINDS
WILL CONTINUE TO BE LIGHT TODAY...BUT A BIT STRONGER THAN WHAT
OCCURRED YESTERDAY. DEEP SOUTHWEST FLOW IS EXPECTED TO DEVELOP
THURSDAY AND FRIDAY IN RESPONSE TO A TROUGH DEVELOPING OVER THE
WEST. THIS WILL RESULT IN BREEZY WEST TO SOUTHWEST WINDS AND VERY
LOW RH THURSDAY AFTERNOON. ALTHOUGH WINDS ARE EXPECTED TO BE
STRONGER FRIDAY...RELATIVE HUMIDITY IS EXPECTED TO BE HIGHER.
SHOWERS AND THUNDERSTORMS WILL BE IN THE FORECAST FROM FRIDAY
THROUGH THE WEEKEND.

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

FORECASTER...MURRELL

.TODAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....70-75.
MIN HUMIDITY........13-17 PERCENT.
20 FOOT WINDS.......EAST NORTHEAST 4-7 MPH BECOMING SOUTHWEST 0900-1000
                    AND INCREASING TO 8 TO 13 MPH IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTH 5 TO 10 MPH BECOMING BECOMING SOUTHWEST
                    BY 1000...INCREASING TO 10-15 MPH BY 1500.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2000 FT AGL INCREASING TO 7500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 5-10 MPH INCREASING TO 10-15 MPH IN
                    THE AFTERNOON.
SMOKE DISPERSAL.....POOR INCREASING TO GOOD BY AFTERNOON.

.TONIGHT...
SKY/WEATHER.........CLEAR (0-10 PERCENT).
MIN TEMPERATURE.....35-40 VALLEY.  45-50 RIDGE TOP.
MAX HUMIDITY........70-75 PERCENT VALLEY...AROUND 40 PERCENT RIDGE.
20 FOOT WINDS.......SOUTHWEST 4-8 MPH...BECOMING EAST NORTHEAST
                    4-7 MPH BY 2200.
RIDGE TOP WINDS.....WEST SOUTHWEST AROUND 10 MPH...BECOMING SOUTH
                    AROUND 5 MPH BY MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4800-5800 FT AGL DECREASING TO 1200 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST SOUTHWEST AROUND 10 MPH...BECOMING SOUTH
                    SOUTHWEST AROUND 5 MPH BY MIDNIGHT.
SMOKE DISPERSAL.....GOOD DECREASING TO POOR BY 2100.

.THURSDAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT) THEN BECOMING PARTLY
                    CLOUDY (35-45 PERCENT).
MAX TEMPERATURE.....72-77.
MIN HUMIDITY........13-17 PERCENT.
20 FOOT WINDS.......SOUTHWEST 4-8 MPH...INCREASING TO AROUND
                    10 MPH BY AROUND 1500. GUSTS TO 25 MPH
                    IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH...INCREASING TO
                    15 MPH BY 1500. GUSTS TO 30 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2300 FT AGL INCREASING TO 8500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST WINDS 15-20 MPH.
SMOKE DISPERSAL.....FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 40S. SOUTH WINDS
AROUND 11 MPH.

.FRIDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 40S. HIGHS AROUND 70. SOUTHWEST WINDS 10-15 MPH.

.SATURDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS AROUND 70. WINDS
GENERALLY LESS THAN 10 MPH.

.SUNDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 40S. HIGHS AROUND 70. WINDS GENERALLY LESS THAN
10 MPH.

$$

FORECASTER...MURRELL
REQUESTED BY...TIDC
REASON FOR REQUEST...WILDFIRE
.TAG 20100824.GRAVE.01/RIW