FNUS75 KRIW 071029
FWSRIW

SPOT FORECAST FOR LOWER GROS VENTRE RX...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
429 AM MDT TUE SEP 7 2010

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON SEPTEMBER 07.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A WARMER SOUTHWEST FLOW WILL PREVAIL TODAY WITH
INCREASING HIGH CLOUDS IN THE AFTERNOON.  THE WARMER TEMPERATURES
AND CONTINUED LOW DEWPOINTS WILL RESULT IN A LOWER MINIMUM
RELATIVE HUMIDITY TREND TODAY. MOISTURE WILL BEGIN TO SURGE NORTH
FROM THE GREAT BASIN TONIGHT WITH INCREASING CLOUDS AND DEWPOINTS
ALONG WITH POSSIBLY AN ISOLATED SHOWER AFTER MIDNIGHT. THE SUB-
TROPICAL PLUME OF MOISTURE WILL REMAIN OVER THE AREA WEDNESDAY
WITH ISOLATED SHOWERS IN THE MORNING WITH A FEW THUNDERSTORMS
BLOSSOMING IN THE AFTERNOON. MINIMUM RELATIVE HUMIDITY WILL TREND
HIGHER WEDNESDAY.


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

FORECASTER...MEUNIER

.TODAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT) IN THE MORNING...BECOMING
                    PARTLY CLOUDY (25-35 PERCENT) IN THE AFTERNOON.
MAX TEMPERATURE.....65-68.
MIN HUMIDITY........14-17 PERCENT.
20 FOOT WINDS.......EAST 4 TO 7 MPH BECOMING SOUTH SOUTHWEST 5-9 MPH
                    BETWEEN 1000 AND NOON AND INCREASING TO 10 TO 15 MPH
                    WITH GUSTS NEAR 25 MPH FROM NOON TO 1400.
RIDGE TOP WINDS.....SOUTH SOUTHEAST 5 TO 10 MPH THROUGH 1000...BECOMING
                    SOUTH SOUTHWEST 15 TO 20 MPH IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2700-3700 FT AGL INCREASING TO 6400-7400 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH IN THE MORNING...BECOMING
                    SOUTHWEST 25 TO 30 MPH IN AFTERNOON.
SMOKE DISPERSAL.....FAIR (49000 KNOT-FT) INCREASING TO VERY GOOD
                    (130300 KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY IN THE EVENING (30-40 PERCENT)...BECOMING
                    MOSTLY CLOUDY AFTER MIDNIGHT WITH ISOLATED RAIN SHOWERS.
MIN TEMPERATURE.....40-43.
MAX HUMIDITY........55-60 PERCENT.
20 FOOT WINDS.......SOUTH SOUTHWEST 8 TO 13 MPH WITH GUSTS TO 20 MPH THROUGH
                    SUNSET...THEN BECOMING EAST OR DOWNSLOPE 4 TO 7 MPH BY
                    MIDNIGHT.
RIDGE TOP WINDS.....SOUTH 20 TO 25 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4900-5900 FT AGL DECREASING TO 1600-2100 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTH 20 TO 25 MPH.
SMOKE DISPERSAL.....VERY GOOD (112700 KNOT-FT) DECREASING TO POOR
                    (35700 KNOT-FT) AFTER MIDNIGHT.

.WEDNESDAY...
SKY/WEATHER.........PARTLY CLOUDY IN THE MORNING (40-50 PERCENT). MOSTLY
                    CLOUDY (65-75 PERCENT) IN THE AFTERNOON. ISOLATED RAIN
                    SHOWERS THROUGH THE DAY. ISOLATED THUNDERSTORMS
                    IN THE AFTERNOON.
MAX TEMPERATURE.....63-66.
MIN HUMIDITY........29-32 PERCENT.
20 FOOT WINDS.......EAST 4 TO 7 MPH BECOMING SOUTH 5-9 MPH WITH GUSTS
                    TO 15 MPH FROM 1000 TO NOON...INCREASING TO 10 TO 15 MPH
                    WITH GUSTS TO 25 MPH IN THE AFTERNOON.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTH AROUND 20 MPH.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3700-4700 FT AGL INCREASING TO 6800-7300 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH AROUND 25 MPH.
SMOKE DISPERSAL.....GOOD (80200 KNOT-FT) INCREASING TO EXCELLENT
                    (151200 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...

.WEDNESDAY NIGHT...PARTLY CLOUDY. ISOLATED SHOWERS AND
THUNDERSTORMS IN THE EVENING...THEN ISOLATED SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 40S. SOUTH WINDS AROUND 13 MPH.

.THURSDAY...COOLER. MOSTLY CLOUDY WITH SCATTERED SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 50S. SOUTHWEST WINDS AROUND 10 MPH.

.FRIDAY...MOSTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS. LOWS
IN THE UPPER 30S. HIGHS AROUND 50. WINDS GENERALLY LESS THAN
10 MPH.

.SATURDAY...PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE
UPPER 50S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...MIKE JOHNSTON
REASON FOR REQUEST...PRESCRIBED
.TAG 20100907.LOWER.01/RIW