FNUS75 KRIW 241616
FWSRIW

SPOT FORECAST FOR WEST SLOPE RX...IA CDC
NATIONAL WEATHER SERVICE RIVERTON WY
1016 AM MDT THU MAR 24 2011

FORECAST IS BASED ON IGNITION TIME OF 1030 MDT ON MARCH 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
LOW PRESSURE TO THE SOUTH OF WYOMING WILL SPREAD CLOUD COVER AND
WIDELY SCATTERED LIGHT PRECIPITATION ACROSS THE AREA THIS AFTERNOON.
THIS SYSTEM WILL MOVE EAST THIS EVENING. IN THE WAKE OF THIS
SYSTEM...A SURGE OF LOW-LEVEL MOISTURE WILL PUSH SOUTH INTO THE BIG
HORN BASIN OVERNIGHT. RELATIVE HUMIDITY RECOVERY WILL BE GOOD. WIND
DURING THE FORECAST PERIOD WILL GENERALLY BE LESS THAN 10 MPH. LOW
MIXING HEIGHTS AND THE WEAK WIND SPEEDS WILL LIMIT SMOKE DISPERSAL.
A SLIGHTLY MORE UNSTABLE ATMOSPHERE ON FRIDAY COULD PROVIDE FAIR
SMOKE DISPERSAL FRIDAY AFTERNOON. EXTENSIVE CLOUD COVER AND LIGHT
AFTERNOON RAIN SHOWERS WILL CONTINUE FRIDAY AS THE NEXT SYSTEM
SWINGS INTO WYOMING FROM THE WEST.

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

FORECASTER...JONES

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT) WITH SCATTERED
                    AFTERNOON LIGHT RAIN SHOWERS.
MAX TEMPERATURE.....45-48.
MIN HUMIDITY........38-41 PERCENT.
20 FOOT WINDS.......BECOMING UPSLOPE/UPVALLEY 4 TO 8 MPH BY 1200.
RIDGE TOP WINDS.....BECOMING SOUTH 5 TO 8 MPH BY 1500.
LAL.................1.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 3500 FT AGL BY 1500.
TRANSPORT WINDS.....WEST-NORTHWEST AROUND 10 MPH.
SMOKE DISPERSAL.....POOR (AROUND 30000 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........CLOUDY (80-90 PERCENT) WITH WIDELY SCATTERED
                    LIGHT RAIN SHOWERS UNTIL 2100...THE BECOMING
                    CHANGING TO LIGHT SNOW SHOWERS BY MIDNIGHT.
MIN TEMPERATURE.....26-29.
MAX HUMIDITY........90-95 PERCENT.
20 FOOT WINDS.......BECOMING DOWNSLOPE/DOWNVALLEY 4 TO 7 MPH
                    BY 2000.
RIDGE TOP WINDS.....WEST 5 TO 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO LESS THAN 1000 FT AGL BY 2000.
TRANSPORT WINDS.....BECOMING DOWNSLOPE/DOWNVALLEY 5 TO 8 MPH
                    BY 2000.
SMOKE DISPERSAL.....POOR (LESS THAN 15000 KNOT-FT).

.FRIDAY...
SKY/WEATHER.........CLOUDY (75-85 PERCENT) WITH WIDELY SCATTERED
                    AFTERNOON LIGHT RAIN SHOWERS.
MAX TEMPERATURE.....AROUND 50.
MIN HUMIDITY........35-38 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 3 TO 6 MPH UNTIL 1000...
                    THEN BECOMING UPSLOPE/UPVALLEY 5 TO 8 MPH
                    BY 1200.
RIDGE TOP WINDS.....SOUTH-SOUTHWEST 6 TO 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......LESS THAN 2000 FT AGL UNTIL 1100...THEN RISING
                    TO AROUND 4000 FT AGL BY 1500.
TRANSPORT WINDS.....DOWNSLOPE/DOWNVALLEY 4 TO 7 MPH UNTIL 1100...
                    THEN BECOMING SOUTH AROUND 10 MPH BY 1500.
SMOKE DISPERSAL.....POOR-FAIR (AROUND 35000-40000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...CLOUDY. CHANCE OF RAIN AND SNOW IN THE EVENING...
THEN CHANCE OF SNOW AFTER MIDNIGHT. LOWS IN THE UPPER 20S. WINDS
GENERALLY LESS THAN 10 MPH.
.SATURDAY...MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW. LOWS IN THE
LOWER 20S. HIGHS IN THE MID 40S. WINDS GENERALLY LESS THAN
10 MPH.
.SUNDAY...MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE UPPER 40S. WINDS
GENERALLY LESS THAN 10 MPH.
.MONDAY...MOSTLY CLOUDY. CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS
IN THE MID 20S. HIGHS IN THE UPPER 40S. WINDS GENERALLY LESS THAN
10 MPH.

$$

FORECASTER...JONES
REQUESTED BY...MONONI
REASON FOR REQUEST...PRESCRIBED
.TAG 20110324.WESTS.02/RIW