FNUS75 KRIW 021028
FWSRIW

SPOT FORECAST FOR NORTH LITTLE MT...BLM WOD
NATIONAL WEATHER SERVICE RIVERTON WY
428 AM MDT THU MAY 2 2013

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON MAY 02.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...AN UPPER RIDGE OF HIGH PRESSURE WILL BUILD INTO THE
AREA TODAY BRINGING IN A WARMER AND DRIER AIRMASS THROUGH THE DAY.
WINDS ALOFT WILL BE FROM THE NORTH WHILE LOW PRESSURE OVER MONTANA
WILL RESULT IN PREVAILING SOUTHERLY WIND AT THE SURFACE. THE SMOKE
SHOULD HIT THE NORTHERLY TRANSPORT WINDS AT AROUND 4000 FT AGL
WITH FAIR SMOKE DISPERSAL IN THE AFTERNOON.

A WEAK COLD FRONT WILL PUSH INTO THE AREA FRIDAY AFTERNOON...WITH
SURFACE WINDS BECOMING NORTH AND A FEW SHOWERS DEVELOPING BY LATE
AFTERNOON.

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

FORECASTER...MEUNIER

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....54-57.
MIN HUMIDITY........16-19 PERCENT.

20 FOOT WINDS.......SOUTH 5 TO 10 MPH.
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH.

HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2100-3100 FT AGL INCREASING TO 4500 FT AGL IN
                    THE AFTERNOON.
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH IN THE MORNING...NORTH
                    NORTHWEST 10 TO 15 MPH IN THE AFTERNOON
SMOKE DISPERSAL.....POOR (21300-36300 KNOT-FT) IN THE MORNING...BECOMING FAIR
                    (48000 KNOT-FT) AFTER NOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....36-39.
MAX HUMIDITY........55-58 PERCENT.

20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY OR SOUTHEAST 4-7 MPH.
RIDGE TOP WINDS.....SOUTH AROUND 5 TO 10 MPH.

HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2000-3000 FT AGL DECREASING TO 500 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
SMOKE DISPERSAL.....POOR (5800-21100 KNOT-FT).

.FRIDAY...
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (60-70 PERCENT). ISOLATED SHOWERS
                    IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 60.
MIN HUMIDITY........21-24 PERCENT.

20 FOOT WINDS.......SOUTH 5 TO 10 MPH IN THE MORNING...BECOMING NORTH
                    5 TO 10 MPH IN THE EARLY AFTERNOON WITH GUSTS 15 TO 20 MPH
                    LATE AFTERNOON.
RIDGE TOP WINDS.....SOUTH 5 TO 10 MPH...BECOMING NORTH 10 TO 15 MPH IN THE
                    AFTERNOON.

HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2100-3100 FT AGL INCREASING TO 6200-7200 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH SHIFTING TO THE NORTH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (14900-38700 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...MOSTLY CLOUDY WITH SCATTERED SHOWERS.
LOWS IN THE UPPER 30S. NORTH WINDS AROUND 11 MPH.

.SATURDAY...MOSTLY CLOUDY WITH SCATTERED SHOWERS AND ISOLATED
SNOW SHOWERS. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 50S.
WINDS GENERALLY LESS THAN 10 MPH.

.SUNDAY...MOSTLY CLEAR. LOWS AROUND 40. HIGHS IN THE UPPER 50S.
WINDS GENERALLY LESS THAN 10 MPH.

.MONDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...JACK MONONI
REASON FOR REQUEST...PRESCRIBED
.TAG 20130502.NORTH.01/RIW