FNUS75 KRIW 271530
FWSRIW

SPOT FORECAST FOR NORTH LITTLE MT2...BLM
NATIONAL WEATHER SERVICE RIVERTON WY
930 AM MDT WED MAR 27 2013

FORECAST IS BASED ON IGNITION TIME OF 0930 MDT ON MARCH 27.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...HIGH PRESSURE SURFACE AND ALOFT WILL BE OVER THE BURN
AREA TODAY AND TONIGHT.  WITH THE HIGH PRESSURE THERE IS A SUBSIDENCE
INVERSION REGIONALLY OVER NORTHERN WYOMING AND SOUTHERN MONTANA AT
AROUND 4000 FEET AGL.  WINDS ARE GENERALLY LIGHT UNDER THE INVERSION.
10 KNOTS AND 4000 FEET GIVES 40000 KNOT FEET WHICH IS THE BREAK BETWEEN
POOR AND FAIR.  THURSDAY WILL HAVE INCREASED MIXING HEIGHTS TO AROUND
5800 TO 6000 FEET AGL.  TRANSPORT WINDS ON THURSDAY WILL BE AROUND
10 KNOTS AS THEY ARE TODAY.

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

FORECASTER...C.BAKER

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (30-40 PERCENT) AFTER 1400 MDT.
MAX TEMPERATURE.....52-55.
MIN HUMIDITY........21-24 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTH 10 TO
                    11 MPH WITH HIGHER GUSTS IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO.
HAINES INDEX........3 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3800-4000 FT AGL.
TRANSPORT WINDS.....SOUTH 10 MPH.
SMOKE DISPERSAL.....POOR TO EXTREME LOW END FAIR BY 1300 MDT
                    (38000-40000 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
MIN TEMPERATURE.....33-36.
MAX HUMIDITY........59-62 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH BECOMING SOUTH 8
                    TO 10 MPH IN THE LATE EVENING AND OVERNIGHT.
RIDGE TOP WINDS.....SOUTH 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......900-1400 FT AGL.
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR (11800-12000 KNOT-FT).

.THURSDAY...
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
MAX TEMPERATURE.....55-58.
MIN HUMIDITY........24-27 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....SOUTH 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5800-6000 FT AGL.
TRANSPORT WINDS.....SOUTH 10 MPH.
SMOKE DISPERSAL.....BECOMING FAIR TO VERY LOW END GOOD BY NOON
                    (58000-60000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...PARTLY CLOUDY. LOWS IN THE UPPER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
.FRIDAY...PARTLY CLOUDY. SCATTERED SHOWERS. LOWS IN THE UPPER
30S. HIGHS IN THE UPPER 50S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...PARTLY CLOUDY. CHANCE OF SHOWERS AND SNOW SHOWERS.
LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 50S. WINDS GENERALLY
LESS THAN 10 MPH.
.SUNDAY...PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN THE
LOWER 50S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...C.BAKER
REQUESTED BY...WENGERT
REASON FOR REQUEST...PRESCRIBED
.TAG 20130327.NORTH.02/RIW