FNUS75 KRIW 061617
FWSRIW

SPOT FORECAST FOR WEST SLOPE RX...BLM WOD
NATIONAL WEATHER SERVICE RIVERTON WY
1017 AM MDT WED APR 6 2011

FORECAST IS BASED ON IGNITION TIME OF 0955 MDT ON APRIL 06.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

HIGH PRESSURE BUILDING OVER THE AREA WILL KEEP CONDITIONS FAIRLY
DRY OVERALL OVER THE NEXT 36 HOURS AHEAD OF A LOW PRESSURE SYSTEM
SET TO MOVE INTO THE AREA LATE THURSDAY TO EARLY FRIDAY MORNING.
SOME AFTERNOON SHOWERS COULD FORM OVER THE BIGHORNS AND BACK BUILD
OVER THE BURN SITE THIS AFTERNOON AND ON THURSDAY AFTERNOON...BUT
THEY WILL BE VERY ISOLATED THIS AFTERNOON...THERE IS A BETTER CHANCE
OF A SHOWER OR TWO ON THURSDAY AFTERNOON. HOWEVER...THE SLIGHTLY
UNSTABLE CONDITIONS WILL ALLOW FOR GOOD SMOKE DISPERSAL.

WINDS WILL BE ON THE INCREASE FROM THE SOUTH THIS AFTERNOON. A FEW
GUSTS IN EXCESS OF 30 MPH ARE LIKELY. WINDS WILL BECOME CALM TOWARD
THURSDAY MORNING AND SHIFT DIRECTION TO THE NORTH THURSDAY NIGHT
AHEAD OF THE STORM SYSTEM.

WET WEATHER IS EXPECTED TO CONTINUE INTO THE WEEKEND UNTIL RIDGING
BUILDS BACK IN LATE SATURDAY NIGHT INTO SUNDAY.

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

FORECASTER...ALLEN

.TODAY...
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) BECOMING MOSTLY
                    CLOUDY (50-70 PERCENT) AFTER 1400 WITH ISOLATED
                    RAIN SHOWERS.
MAX TEMPERATURE.....57.
MIN HUMIDITY........28-33 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 3-9 MPH BECOMING SOUTH 11 TO
                    17 MPH WITH GUSTS TO AROUND 25 MPH AFTER 1200.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH INCREASING TO AROUND 25
                    MPH IN THE AFTERNOON.
MIXING HEIGHT.......1200 FT AGL INCREASING TO 3500-4400 FT AGL IN
                    THE AFTERNOON.
TRANSPORT WINDS.....NORTH AROUND 9 MPH INCREASING TO SOUTH 17 TO 23
                    MPH IN THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....FAIR (20000 KNOT-FT) INCREASING TO GOOD (77000
                    KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). ISOLATED RAIN SHOWERS
                    IN THE EVENING.
MIN TEMPERATURE.....28-32.
MAX HUMIDITY........70-80 PERCENT.
20 FOOT WINDS.......SOUTH WINDS AROUND 12 MPH AND GUSTY BECOMING
                    SOUTHEAST 11 TO 16 MPH WITH GUSTS TO AROUND 25 MPH
                    AFTER MIDNIGHT.
RIDGE TOP WINDS.....SOUTH AROUND 20 MPH SHIFTING TO THE SOUTHWEST
                    IN THE LATE EVENING...THEN INCREASING TO AROUND
                    35 MPH AFTER 0200.
MIXING HEIGHT.......2300-3300 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH SHIFTING TO THE
                    SOUTH 8 TO 17 MPH IN THE LATE EVENING AND
                    EARLY MORNING...THEN INCREASING TO AROUND 23
                    MPH EARLY IN THE MORNING.
SMOKE DISPERSAL.....FAIR (20000-50000 KNOT-FT).

.THURSDAY...
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). SCATTERED RAIN
                    SHOWERS IN THE AFTERNOON.
MAX TEMPERATURE.....48-52.
MIN HUMIDITY........35-40 PERCENT.
20 FOOT WINDS.......SOUTHEAST WINDS AROUND 13 MPH WITH HIGHER GUSTS
                    EARLY IN THE MORNING BECOMING UPSLOPE/UPVALLEY
                    5-9 MPH.
RIDGE TOP WINDS.....SOUTHEAST AROUND 20 MPH BECOMING SOUTH 5 TO 10
                    MPH IN THE LATE MORNING AND EARLY
                    AFTERNOON...THEN SHIFTING TO THE NORTHWEST LATE
                    IN THE AFTERNOON.
MIXING HEIGHT.......1200 FT AGL INCREASING TO 4400 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 20 MPH BECOMING SOUTH 9 TO 10
                    MPH IN THE LATE MORNING AND EARLY
                    AFTERNOON...THEN SHIFTING TO THE SOUTHWEST
                    AROUND 12 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (15900-33700 KNOT-FT) INCREASING TO FAIR
                    (50000 KNOT-FT) BY 1200.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...RAIN AND SNOW AFTER 2100...THEN SNOW AFTER
MIDNIGHT. LOWS IN THE UPPER 20S. SOUTH WINDS AROUND 10 MPH BECOMING
NORTH AROUND 15 MPH AFTER 1800.
.FRIDAY...CLOUDY WITH RAIN AND SNOW. LOWS IN THE MID 20S. HIGHS
IN THE UPPER 30S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...MOSTLY CLOUDY WITH CHANCE OF RAIN AND SNOW. LOWS IN
THE MID 20S. HIGHS IN THE UPPER 40S. WINDS GENERALLY LESS THAN
10 MPH.
.SUNDAY...PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN THE
UPPER 40S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...ALLEN
REQUESTED BY...MONONI
REASON FOR REQUEST...PRESCRIBED
.TAG 20110406.WESTS.02/RIW