FNUS75 KRIW 241416
FWSRIW

SPOT FORECAST FOR LOWER GROS VENTRE...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
816 AM MDT THU SEP 24 2009

FORECAST IS BASED ON IGNITION TIME OF 0840 MDT ON SEPTEMBER 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
NORTH TO NORTHEAST FLOW WILL REMAIN OVER NORTHWEST WYOMING THROUGH
FRIDAY...WITH CLEAR AND BENIGN CONDITIONS EXPECTED. A WEAK...DRY TROUGH
WILL MOVE ACROSS MONTANA FRIDAY NIGHT BACKING THE WIND TO THE
NORTHWEST.

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

FORECASTER...T.BAKER

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....64-68.
MIN HUMIDITY........19-22 PERCENT.
20 FOOT WINDS.......LIGHT AND VARIABLE...BECOMING NORTH TO NORTHEAST
                    4-8 MPH AROUND NOON.
RIDGE TOP WINDS.....NORTH TO NORTHEAST 5 TO 10 MPH WITH GUSTS TO 20 MPH.
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 8000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTH 15 MPH.
SMOKE DISPERSAL.....POOR (30000 KNOT-FT) INCREASING TO VERY GOOD (120000
                    KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
MIN TEMPERATURE.....39-42.
MAX HUMIDITY........48-51 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....NORTHEAST TO EAST 5 TO 10 MPH GUSTS TO 20 MPH...
                    GRADUALLY DIMINISHING TO 4 TO 8 MPH AROUND 0300.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5000 FT AGL DECREASING TO 1500 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTH TO NORTHEAST 10 MPH.
SMOKE DISPERSAL.....FAIR (50000 KNOT-FT) BECOMING POOR (15000 KNOT-FT).

.FRIDAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....65-70.
MIN HUMIDITY........16-20 PERCENT.
20 FOOT WINDS.......LIGHT AND VARIABLE...BECOMING NORTH TO NORTHEAST
                    4-8 MPH AROUND NOON.
RIDGE TOP WINDS.....NORTH TO NORTHEAST 5 TO 10 MPH WITH GUSTS TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1500 FT AGL INCREASING TO 9000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTH 15 MPH.
SMOKE DISPERSAL.....POOR (22500 KNOT-FT) INCREASING TO VERY GOOD (135000
                    KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 40S. WINDS
GENERALLY LESS THAN 10 MPH.
.SATURDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.
.SUNDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.
.MONDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...T.BAKER
REQUESTED BY...MCFARLAND
REASON FOR REQUEST...PRESCRIBED
.TAG 20090924.LOWER.01/RIW