FNUS75 KRIW 261001
FWSRIW

SPOT FORECAST FOR GRAVEL...IA TDC
NATIONAL WEATHER SERVICE RIVERTON WY
401 AM MDT THU AUG 26 2010

FORECAST IS BASED ON REQUEST TIME OF 1802 MDT ON AUGUST 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING 1 P.M. TODAY THROUGH 8 P.M. THIS EVENING...

.DISCUSSION...
A RED FLAG WARNING IS IN EFFECT FROM 1 P.M. TODAY UNTIL 8 P.M. THIS EVENING.
CLEAR AND DRY CONDITIONS ARE EXPECTED TODAY. A STORM SYSTEM
DEVELOPING OVER THE WEST...WILL RESULT IN DEEP SOUTHWEST FLOW
DEVELOPING OVER WESTERN WYOMING TODAY. RELATIVE HUMIDITY WILL
REMAIN VERY LOW. AS THE STORM SYSTEM APPROACHES THE AREA
FRIDAY...BREEZY WINDS ARE EXPECTED...BUT WITH AN INCREASED
AFTERNOON RELATIVE HUMIDITY...AROUND 20 PERCENT. THERE WILL ALSO
BE INCREASING CHANCES OF SHOWERS AND THUNDERSTORMS FROM LATE
TONIGHT INTO THE WEEKEND...WITH THE BEST CHANCE OF RECEIVING A
WETTING RAIN FRIDAY NIGHT AND SATURDAY.

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

FORECASTER...MURRELL

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (10 PERCENT).
MAX TEMPERATURE.....81-84.
MIN HUMIDITY........13-17 PERCENT.
20 FOOT WINDS.......EAST 3-7 MPH...BECOMING SOUTHWEST 5-10 MPH BETWEEN 1000L
                    AND NOON...INCREASING TO
                    8-12 MPH BY 1500. GUSTS AROUND 22 MPH IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH INCREASING TO 15 MPH BY 1400.
                    GUSTS TO 30 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3000 FT AGL INCREASING TO 9000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH INCREASING TO 20 MPH BY 1400.
SMOKE DISPERSAL.....FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (40 PERCENT). ISOLATED RAIN
                    SHOWERS AFTER MIDNIGHT.
MIN TEMPERATURE.....47-52
MAX HUMIDITY........VALLEY AROUND 50 PERCENT. RIDGE 25-30 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 4-8 MPH. GUSTS AROUND 15 MPH.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......6500 FT AGL DECREASING TO 1600 FT AGL BY 2100.
TRANSPORT WINDS.....SOUTHWEST 10 TO 20 MPH.
SMOKE DISPERSAL.....VERY GOOD DECREASING TO POOR BY 2100.

.FRIDAY...
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS.
MAX TEMPERATURE.....68-72.
MIN HUMIDITY........19-23 PERCENT.
20 FOOT WINDS.......SOUTHWEST 5-10 MPH INCREASING TO 10-15 MPH BETWEEN
                    1100 AND 1300. GUSTS AROUND 30 MPH IN THE
                    AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 25 MPH. GUST AROUND 35 MPH.
LAL.................2.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3600 FT AGL INCREASING TO 7800 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 20 TO 25 MPH.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...

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

.SATURDAY...MOSTLY CLOUDY WITH SCATTERED SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE MID 60S. SOUTHWEST
WINDS 10-15 MPH.

.SUNDAY...PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS AROUND 40. HIGHS IN THE MID 60S. WINDS GENERALLY LESS THAN
10 MPH.

.MONDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 60S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MURRELL
REQUESTED BY...TIDC
REASON FOR REQUEST...WILDFIRE
.TAG 20100825.GRAVE.01/RIW