FNUS75 KRIW 291534
FWSRIW

SPOT FORECAST FOR NORTH LITTLE MT4...BLM WOD
NATIONAL WEATHER SERVICE RIVERTON WY
934 AM MDT FRI MAR 29 2013

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON MARCH 29.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...THE AIR MASS OVER THE BURN AREA WILL BECOME UNSTABLE
THROUGH THE REST OF THE MORNING WITH INCREASING CLOUDS.  EXPECT
MIXING HEIGHTS TO INCREASE TO AROUND 5500 FEET AGL BETWEEN 10 AM AND 11 AM
WITH INCREASING SOUTHWEST WINDS AROUND 10 KNOTS. A COLD FRONT IN
EXTREME SOUTHERN MONTANA WILL MOVE SOUTH THIS AFTERNOON PASSING THROUGH
AROUND 1400 MDT WITH MIXING HEIGHTS DECREASING TO 3000 FEET AGL AND
CONTINUING TO LOWER THROUGH THE AFTERNOON WITH CLOUDY SKIES AND SCATTERED
RAIN SHOWERS BECOMING MORE WIDESPREAD.  TEMPERATURES WILL DROP AND RELATIVE
HUMIDITY WILL INCREASE WITH WIND BECOMING NORTH NORTHWESTERLY BEHIND THE
COLD FRONT.

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

FORECASTER...C.BAKER

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). ISOLATED RAIN
                    SHOWERS BECOMING MORE WIDESPREAD AFTER 1400 MDT
                    IN THE AFTERNOON.
MAX TEMPERATURE.....59-62 FALLING AFTER 1400 MDT INTO THE MID 50S.
MIN HUMIDITY........20-23 PERCENT INCREASING AFTER 1400 MDT TO 30 TO
                    33 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTH AROUND
                    10 MPH IN THE LATE MORNING AND EARLY
                    AFTERNOON...THEN BECOMING NORTH NORTHEASTERLY 10 TO
                    12 MPH AFTER 1400 MDT WITH GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....SOUTH 12 TO 15 MPH.
LAL.................2.
CHC OF WETTING RAIN.15 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 5500 FT AGL BY 1000 MDT THEN
                    DECREASING TO 3000 FT AGL AFTER 1400 MDT IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTH 10 TO 12 MPH.
SMOKE DISPERSAL.....INCREASING TO FAIR (55000 TO 58000 KNOT-FT) BETWEEN
                    1000 MDT AND 1100 MDT...BECOMING POOR LESS THAN
                    40000 KNOT-FEET AFTER 1400 MDT IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SCATTERED RAIN
                    SHOWERS.
MIN TEMPERATURE.....AROUND 40.
MAX HUMIDITY........73-76 PERCENT.
20 FOOT WINDS.......NORTHEAST 8 TO 13 MPH WITH GUSTS TO AROUND 25 MPH
                    IN THE LATE EVENING AND  EARLY MORNING...THEN BECOMING
                    DOWNSLOPE/DOWNVALLEY 4-7 MPH EARLY IN THE
                    MORNING.
RIDGE TOP WINDS.....NORTHWEST AROUND 10 MPH SHIFTING TO THE
                    NORTHEAST IN THE LATE EVENING AND EARLY
                    MORNING...THEN SHIFTING TO THE SOUTHWEST EARLY
                    IN THE MORNING.
LAL.................1.
CHC OF WETTING RAIN.15 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3900 FT AGL DECREASING TO 1500 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTH AROUND 14 MPH SHIFTING TO THE SOUTHWEST
                    AROUND 7 MPH AFTER MIDNIGHT.
SMOKE DISPERSAL.....POOR (10000-20000 KNOT-FT).

.SATURDAY...
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). SCATTERED RAIN
                    SHOWERS.
MAX TEMPERATURE.....55-58.
MIN HUMIDITY........34-37 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTHWEST 5 TO 10 MPH INCREASING TO AROUND 15
                    MPH LATE IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3300 FT AGL INCREASING TO 5500 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 10 TO 12 MPH.
SMOKE DISPERSAL.....POOR IN THE MORNING THEN FAIR (58000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...PARTLY CLOUDY. LOWS IN THE MID 30S. WINDS
GENERALLY LESS THAN 10 MPH.
.SUNDAY...COOLER. PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
SNOW SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE MID 40S. WINDS
GENERALLY LESS THAN 10 MPH.
.MONDAY...PARTLY CLOUDY. LOWS AROUND 30. HIGHS IN THE MID 40S.
WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE MID
50S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...C.BAKER
REQUESTED BY...MIKE WENGERT
REASON FOR REQUEST...PRESCRIBED
.TAG 20130329.NORTH.02/RIW