FNUS75 KRIW 271504
FWSRIW

SPOT FORECAST FOR GRAVEL...IA TDC
NATIONAL WEATHER SERVICE RIVERTON WY
904 AM MDT FRI AUG 27 2010

FORECAST IS BASED ON REQUEST TIME OF 0838 MDT ON AUGUST 27.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A TROUGH OF LOW PRESSURE WILL IMPACT THE FIRE TODAY. THIS SYSTEM
WILL BRING QUITE DIFFERENT CONDITIONS THAN THOSE EXPERIENCED OVER
THE PAST COUPLE OF DAYS. EXPECT COOLING TEMPERATURES AND RISING
DAYTIME HUMIDITY THROUGH THE WEEKEND. ELEVATED SOUTHWEST WIND WILL
BE FOUND OVER THE FIRE...WITH THE STRONGEST OF THESE SOUTHWESTERLY WINDS
EXPECTED DURING THE AFTERNOON AND EARLY EVENING HOURS. IN
ADDITION...THIS SYSTEM WILL BRING SCATTERED SHOWERS AND
THUNDERSTORMS OVER THE FIRE THIS WEEKEND. THUNDERSTORMS WILL HAVE
THE POTENTIAL TO BRING GUSTY WIND TO 45 MPH...SMALL HAIL AND
PERIODS OF HEAVY RAINFALL AS THEY MOVE OVER THE FIRE.

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

FORECASTER...BRANHAM

.TODAY...
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS BECOMING SCATTERED AFTER 1200.
MAX TEMPERATURE.....67-72.
MIN HUMIDITY........21-26 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST 15
                    TO 20 MPH WITH GUSTS TO AROUND 30 MPH AFTER
                    1100. GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH INCREASING TO 15 TO 20
                    MPH AFTER 1100.
LAL.................2 UNTIL 1200...THEN 3.
CHC OF WETTING RAIN.4 PERCENT.
HAINES INDEX........4 INCREASING TO 5 OR MODERATE POTENTIAL FOR
                    LARGE PLUME DOMINATED FIRE GROWTH AFTER 1400.
MIXING HEIGHT.......INCREASING TO 6100-6900 FT AGL BY 1400.
TRANSPORT WINDS.....SOUTHWEST 20 TO 25 MPH.
SMOKE DISPERSAL.....GOOD (63400 KNOT-FT) INCREASING TO VERY GOOD
                    (124800 KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). SCATTERED
                    SHOWERS AND THUNDERSTORMS.
MIN TEMPERATURE.....41-45.
MAX HUMIDITY........79-82 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO
                    AROUND 25 MPH BECOMING DOWNSLOPE/DOWNVALLEY
                    4-7 MPH AFTER 2200...THEN BECOMING SOUTH AT
                    8 TO 12 MPH WITH GUSTS TO AROUND 15 MPH
                    BY 0400. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH SHIFTING TO THE SOUTH
                    AT 6 TO 10 MPH BY 0400.
LAL.................3.
CHC OF WETTING RAIN.4 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH...DECREASING TO 3
                    AFTER 2300.
MIXING HEIGHT.......DECREASING TO 500-1000 FT AGL BY 0200.
TRANSPORT WINDS.....SOUTHWEST 20 TO 25 MPH BECOMING SOUTH AT
                    6 TO 10 MPH AFTER 0100.
SMOKE DISPERSAL.....GOOD (71000 KNOT-FT) DECREASING TO POOR (9000
                    KNOT-FT) AFTER 0100.

.SATURDAY...
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (70-80 PERCENT) AFTER 1100.
                    SCATTERED SHOWERS AND THUNDERSTORMS.
MAX TEMPERATURE.....59-64.
MIN HUMIDITY........39-43 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTH 10 TO
                    15 MPH WITH GUSTS TO AROUND 25 MPH AFTER 1300.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTH 10 TO 15 MPH INCREASING TO 20 TO 25 MPH
                    AFTER 1300.
LAL.................3 INCREASING TO 4 AFTER 1100.
CHC OF WETTING RAIN.28 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 4400-5400 FT AGL BY 1400.
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH INCREASING TO 20 TO 25 MPH
                    AFTER 1100.
SMOKE DISPERSAL.....POOR TO GOOD (33800-82800 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...MOSTLY CLOUDY. SCATTERED SHOWERS AND
THUNDERSTORMS IN THE EVENING...THEN SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE LOWER 40S.
WINDS GENERALLY LESS THAN 10 MPH.
.SUNDAY...MOSTLY CLOUDY WITH SCATTERED SHOWERS AND THUNDERSTORMS.
LOWS IN THE MID 30S. HIGHS IN THE LOWER 60S. WINDS GENERALLY LESS
THAN 10 MPH.
.MONDAY...MOSTLY CLOUDY. CHANCE OF SHOWERS WITH POSSIBLE SNOW
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 30S. HIGHS IN THE
MID 50S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE LOWER 30S. HIGHS IN THE UPPER
50S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...BRANHAM
REQUESTED BY...KINGS PEAK WFM
REASON FOR REQUEST...WILDFIRE
.TAG 20100827.GRAVE.01/RIW