FNUS75 KRIW 181048
FWSRIW

SPOT FORECAST FOR HURRICANE MESA FIRE...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
448 AM MDT THU OCT 18 2012

FORECAST IS BASED ON REQUEST TIME OF 2018 MDT ON OCTOBER 17.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

A RIDGE OF HIGH PRESSURE WILL PUSH ACROSS THE AREA TODAY AND TONIGHT.
THIS WILL RESULT IN MUCH WEAKER WINDS THAN WHAT OCCURRED YESTERDAY...BUT
STILL BREEZY FROM THE WEST. ALSO...DRY AND SLIGHTLY WARMER CONDITIONS
ARE EXPECTED. THE RIDGE BEGINS TO BREAK DOWN FRIDAY WITH WINDIER WEST
WINDS EXPECTED FRIDAY AFTERNOON...WITH WARMER TEMPERATURES AND SLIGHTLY
LOWER RELATIVE HUMIDITY. BOTH TODAY AND FRIDAY WILL BE DRY. A STORM
SYSTEM FORMING ACROSS THE WEST THIS WEEKEND...AND GRADUALLY PUSHING
ACROSS THE ROCKIES NEXT WEEK WILL RESULT IN PERIODS OF INCLEMENT
WEATHER...BEGINNING SATURDAY AND LASTING THROUGH AT LEAST MIDDLE OF
NEXT WEEK. ANY PRECIPITATION THAT FALLS ON SATURDAY IS EXPECTED TO BE
RAIN...BUT IS EXPECTED TO BE MAINLY SNOW FROM SUNDAY AND BEYOND.

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

FORECASTER...MURRELL

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (10 PERCENT) BECOMING PARTLY
                    CLOUDY (40 PERCENT) IN THE AFTERNOON.
MAX TEMPERATURE.....45.
MIN HUMIDITY........22 PERCENT.
20 FOOT WINDS.......WEST 10-15 MPH. GUSTS TO 25 MPH.
RIDGE TOP WINDS.....WEST NORTHWEST 15-20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3000 FT AGL.
TRANSPORT WINDS.....WEST NORTHWEST 15-25 MPH.
SMOKE DISPERSAL.....FAIR IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
MIN TEMPERATURE.....25.
MAX HUMIDITY........55 PERCENT.
20 FOOT WINDS.......WEST AROUND 10 MPH.
RIDGE TOP WINDS.....WEST 10-15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO 800 FT AGL.
TRANSPORT WINDS.....WEST 10-15 MPH.
SMOKE DISPERSAL.....POOR.

.FRIDAY...
SKY/WEATHER.........PARTLY CLOUDY (40 PERCENT).
MAX TEMPERATURE.....55.
MIN HUMIDITY........20 PERCENT.
20 FOOT WINDS.......WEST 10-15 MPH...INCREASING TO AROUND 20 MPH
                    IN THE AFTERNOON. GUSTS TO AROUND 35 MPH IN
                    THE AFTERNOON.
RIDGE TOP WINDS.....WEST 15-20 MPH...INCREASING TO 20-25 MPH
                    IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3500 FT AGL.
TRANSPORT WINDS.....WEST 15-25 MPH...INCREASING TO 20-30 MPH
                    IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...

.FRIDAY NIGHT...MOSTLY CLOUDY. LOWS IN THE MID 30S. WEST WINDS
AROUND 15 MPH.

.SATURDAY...MOSTLY CLOUDY WITH WIDELY SCATTERED RAIN SHOWERS.
HIGHS IN THE UPPER 40S. WEST WINDS 15-20 MPH.

.SUNDAY...MOSTLY CLOUDY WITH A SLIGHT CHANCE OF SNOW SHOWERS. LOWS IN
THE MID 20S. HIGHS IN THE LOWER 40S. WEST WINDS AROUND 10-15 MPH.

.MONDAY...MOSTLY CLOUDY WITH A CHANCE OF SNOW SHOWERS. SOME SNOW
ACCUMULATION POSSIBLE. LOWS AROUND 25. HIGHS AROUND 40. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MURRELL
REQUESTED BY...HAL BROMLEY
REASON FOR REQUEST...WILDFIRE
.TAG 20121017.HURRI.02/RIW