FNUS75 KRIW 290857
FWSRIW

SPOT FORECAST FOR LOWER GROS VENTRE RX...IA TDC
NATIONAL WEATHER SERVICE RIVERTON WY
257 AM MDT WED SEP 29 2010

FORECAST IS BASED ON IGNITION TIME OF 1735 MDT ON SEPTEMBER 28.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

ANOTHER VERY WARM AND DRY DAY IS EXPECTED ACROSS THE REGION. WINDS
WILL BE MUCH LIGHTER THAN YESTERDAY...WITH LIGHT AND MAINLY
TERRAIN DRIVEN WINDS. THE UNSEASONABLY WARM AND DRY CONDITIONS
WILL CONTINUE THROUGH SUNDAY. MODELS ARE STILL HINTING AT A SYSTEM
AFFECTING THE AREA NEXT MONDAY AND/OR TUESDAY. MODELS DISAGREE ON
LOCATION AND AMOUNTS OF PRECIPITATION STILL...BUT AGREE ON COOLER
CONDITIONS MOVING INTO THE AREA. BREEZY CONDITIONS ARE EXPECTED
MONDAY.

...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.....73-78.
MIN HUMIDITY........13-17 PERCENT.
20 FOOT WINDS.......BECOMING UPSLOPE/UPVALLEY 4-7 MPH AROUND 1000.
RIDGE TOP WINDS.....LIGHT AND VARIABLE...BECOMING WEST NORTHWEST
                    5-10 MPH AROUND 1400.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......800 FT AGL INCREASING TO 6500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....LIGHT AND VARIABLE...BECOMING WEST NORTHWEST
                    5-10 MPH AROUND 1400.
SMOKE DISPERSAL.....POOR INCREASING TO FAIR (48300 KNOT-FT)
                    AROUND 1500.

.TONIGHT...
SKY/WEATHER.........CLEAR (0-10 PERCENT).
MIN TEMPERATURE.....40-45.
MAX HUMIDITY........AROUND 45 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 3-6 MPH.
RIDGE TOP WINDS.....WEST NORTHWEST 5 TO 10 MPH...BECOMING LIGHT SOUTH
                    BY MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4000 FT AGL DECREASING TO 400 FT AGL BY MIDNIGHT.
TRANSPORT WINDS.....WEST NORTHWEST 5 TO 10 MPH...BECOMING LIGHT SOUTH
                    BY MIDNIGHT.
SMOKE DISPERSAL.....DECREASING TO POOR BY 1900.

.THURSDAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....73-77.
MIN HUMIDITY........14-18 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 4-8 MPH BY 1000...BECOMING
                    SOUTHWEST 4-8 MPH BETWEEN NOON AND 1400.
RIDGE TOP WINDS.....LIGHT SOUTH TO SOUTHEAST...BECOMING WEST SOUTHWEST
                    5-10 MPH AROUND NOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......800 FT AGL INCREASING TO 6600 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 5-10 MPH...BECOMING WEST AROUND 10 MPH
                    BETWEEN NOON AND 1400.
SMOKE DISPERSAL.....POOR INCREASING TO FAIR BY EARLY AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...CLEAR. LOWS IN THE LOWER 40S. WINDS GENERALLY
LESS THAN 10 MPH.

.FRIDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER
70S. WINDS GENERALLY LESS THAN 10 MPH.

.SATURDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER
70S. WINDS GENERALLY LESS THAN 10 MPH.

.SUNDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER
60S. WEST TO SOUTHWEST AROUND 10 MPH IN THE AFTERNOON. GUSTS
AROUND 20 MPH.

$$

FORECASTER...MURRELL
REQUESTED BY...BURN BOSS
REASON FOR REQUEST...PRESCRIBED
.TAG 20100928.LOWER.01/RIW