FNUS75 KRIW 100134
FWSRIW

SPOT FORECAST FOR LOWER GROS VENTRE RX...NPS
NATIONAL WEATHER SERVICE RIVERTON WY
734 PM MDT MON APR 9 2012

FORECAST IS BASED ON IGNITION TIME OF 1800 MDT ON APRIL 09.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...DRY WEATHER IS FORECAST TODAY (TUESDAY) AND TONIGHT.
WIND SPEED AND DIRECTION WILL BE SIMILAR TO MONDAY WITH LOW
AFTERNOON RELATIVE HUMIDITY AGAIN. LOW LEVEL INVERSION WILL
QUICKLY SUBSIDE BY LATE MORNING WITH GOOD SMOKE DISPERSION BY MID
AFTERNOON. AFTER SUNSET THE WIND WILL DECREASE AND BECOME DOWNVALLEY
BY MIDNIGHT. WEDNESDAY WILL SEE INCREASING CLOUDS BY MIDDAY. THE
WIND WILL INCREASE AS WELL AS A COLD FRONT WILL BE MOVING TOWARD
WESTERN WYOMING. THERE WILL BE A SLIGHT CHANCE OF SHOWERS WITH
ISOLATED THUNDERSTORMS OVER THE HIGHER MOUNTAINS AFTER 300 PM
WEDNESDAY AFTERNOON. AT THIS TIME THE COLD FRONT IS FORECAST TO
MOVE THROUGH THE BURN AREA BETWEEN 600 PM AND MIDNIGHT WEDNESDAY
EVENING. THURSDAY LOOKS MUCH COLDER WITH A CHANCE OF RAIN OR SNOW.

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

FORECASTER...AR

.TODAY (TUESDAY)...

SKY/WEATHER.........MOSTLY SUNNY.

MAX TEMPERATURE.....62-67 AT 7000 FEET.
                    50-55 AT 9000 FEET.

MIN HUMIDITY........15-20 PERCENT AT 7000 FEET.
                    19-24 PERCENT AT 9000 FEET.

20 FOOT WINDS.......VARIABLE AT 3 TO 6 MPH UNTIL 1300.
                    THEN SOUTHWEST TO WEST AT 6 TO 10 MPH WITH GUSTS
                    TO 13 MPH AFTER 1300.

RIDGE TOP WINDS.....BECOMING SOUTH TO SOUTHWEST AT 5 TO 10 MPH BY 1200.
                    THEN SOUTH TO SOUTHWEST AT 10 TO 14 MPH WITH GUSTS
                    TO 18 MPH AFTER 1300.
LAL.................1.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 5000-6000 FT AGL IN THE AFTERNOON.

TRANSPORT WINDS.....SOUTH TO SOUTHWEST AT 5 TO 10 MPH BY 1200.
                    SOUTH TO SOUTHWEST AROUND 15 MPH AFTER 1200.

SMOKE DISPERSAL.....POOR...BECOMING FAIR AFTER 1100...BECOMING GOOD
                    AFTER 1400.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.

MIN TEMPERATURE.....23-28 AT 7000 FEET.
                    28-33 AT 9000 FEET.

MAX HUMIDITY........70-75 AT 7000 FEET.
                    60-65 AT 9000 FEET.

20 FOOT WINDS.......SOUTH TO SOUTHWEST AT 6 TO 10 MPH WITH GUSTS TO 13 MPH
                    UNTIL 1900.  THEN SOUTH TO SOUTHWEST AT 5 TO 8 MPH
                    AFTER 1900 UNTIL 2300.  THEN DOWNSLOPE/DOWNVALLEY
                    AT 3 TO 6 MPH MPH AFTER 2300.

RIDGE TOP WINDS.....SOUTH TO SOUTHWEST AT 8 TO 12 MPH WITH GUSTS TO 16 MPH
                    UNTIL 1900.  THEN SOUTH TO SOUTHWEST AT 5 TO 10 MPH
                    AFTER 1900 UNTIL 2300.  THEN SOUTH TO SOUTHWEST AT
                    4 TO 7 MPH AFTER 2300.
LAL.................1.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO UNDER 1000 FEET AFTER MIDNIGHT.

TRANSPORT WINDS.....SOUTH TO SOUTHWEST 10 TO 15 MPH UNTIL 1900.
                    THEN SOUTH TO SOUTHWEST AT 5 TO 10 MPH BY 2000
                    AND OVERNIGHT.

SMOKE DISPERSAL.....GOOD UNTIL SUNSET...THEN FAIR...BECOMING POOR AROUND
                    MIDNIGHT.

.WEDNESDAY...
SKY/WEATHER.........INCREASING CLOUDS. A SLIGHT CHANCE OF RAIN
                    SHOWERS AND ISOLATED THUNDERSTORMS AFTER 300 PM.

MAX TEMPERATURE.....60-65 AT 7000 FEET.
                    48-53 AT 9000 FEET.

MIN HUMIDITY........15-20 PERCENT AT 7000 FEET.
                    20-25 PERCENT AT 9000 FEET.

20 FOOT WINDS.......VARIABLE AT 3 TO 6 MPH UNTIL 1300.
                    THEN SOUTH TO SOUTHWEST AT 6 TO 10 MPH WITH GUSTS
                    TO 15 MPH AFTER 1300.

RIDGE TOP WINDS.....BECOMING SOUTH TO SOUTHWEST AT 5 TO 10 MPH BY 1200.
                    THEN SOUTH TO SOUTHWEST AT 10 TO 15 MPH WITH GUSTS
                    AROUND 20 MPH AFTER 1300.

LAL.................1 UNTIL 1500...THEN 2.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 5000-6000 FT AGL IN THE AFTERNOON.

TRANSPORT WINDS.....SOUTH TO SOUTHWEST AT 5 TO 10 MPH BY 1300.
                    SOUTH TO SOUTHWEST 15 TO 20 MPH AFTER 1300.

SMOKE DISPERSAL.....POOR...BECOMING FAIR AFTER 1200...BECOMING GOOD
                    AFTER 1400.

.FORECAST DAYS 3 THROUGH 5...

.WEDNESDAY NIGHT...MOSTLY CLOUDY. CHANCE OF SHOWERS AND ISOLATED
THUNDERSTORMS UNTIL 2100.  THEN A CHANCE OF RAIN AND SNOW SHOWERS.
LOWS 25 TO 32.  SOUTHWEST WIND 10 TO 15 MPH.

.THURSDAY...MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW SHOWERS.
HIGHS 35 TO 42. SOUTHWEST WIND 10 TO 15 MPH.

.FRIDAY...MOSTLY CLOUDY WITH CHANCE OF RAIN AND SNOW SHOWERS.
LOWS IN THE 20S. HIGHS IN THE UPPER 30S TO LOWER 40S.
WINDS GENERALLY LESS THAN 10 MPH.

.SATURDAY...MOSTLY CLOUDY. CHANCE OF SHOWERS AND SNOW SHOWERS.
LOWS IN THE 20S. HIGHS IN THE UPPER 30S TO LOWER 40S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...ROSS
REQUESTED BY...KATE CUENO
REASON FOR REQUEST...PRESCRIBED
.TAG 20120409.LOWER.01/RIW