FNUS75 KRIW 181642
FWSRIW

SPOT FORECAST FOR ALUM...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
1042 AM MDT SUN AUG 18 2013

FORECAST IS BASED ON REQUEST TIME OF 1009 MDT ON AUGUST 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...DRY AND COOLER WEST FLOW FROM THE PACIFIC WILL BE OVER
THE FIRE AREA TODAY AND MONDAY.  RELATIVE HUMIDITY WILL BE HIGHER
THAN ON SATURDAY WITH THE COOLER TEMPERATURES.  A SURGE OF SUBTROPICAL
MOISTURE WILL COME NORTH FROM THE GREAT BASIN ON TUESDAY WITH INCREASING
CLOUDS AND SCATTERED LIGHT RAIN SHOWERS WITH ISOLATED AFTERNOON
THUNDERSTORMS POSSIBLE. THIS TREND IS EXPECTED TO CONTINUE ON WEDNESDAY
WITH INCREASED SHOWER ACTIVITY AND COOLER TEMPERATURES WITH HIGHER
RELATIVE HUMIDITY.

...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).
MAX TEMPERATURE.....76-79.
MIN HUMIDITY........18-21 PERCENT.
20 FOOT WINDS.......WEST AROUND 10 MPH AND GUSTY IN THE AFTERNOON.
RIDGE TOP WINDS.....WEST 15 MPH GUSTS TO 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....41-45.
MAX HUMIDITY........64-68 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 8 TO 9 MPH WITH GUSTS TO AROUND
                    15 MPH IN THE EVENING BECOMING
                    DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....SOUTHWEST 15 MPH GUSTS TO 20 MPH IN THE EVENING
                    THEN 8 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.MONDAY...
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (25-35 PERCENT) BY 1400.
MAX TEMPERATURE.....75-80.
MIN HUMIDITY........16-19 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING WEST AROUND
                    10 MPH IN THE AFTERNOON. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....WEST 15 MPH WITH GUSTS TO 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.FORECAST DAYS 3 THROUGH 5...
.MONDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 40S. WINDS
GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 70S. WINDS GENERALLY
LESS THAN 10 MPH.
.WEDNESDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS AROUND 40. HIGHS IN THE LOWER 70S. WINDS
GENERALLY LESS THAN 10 MPH.
.THURSDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS AROUND 40. HIGHS IN THE MID 70S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...C.BAKER
REQUESTED BY...IC- MIKE LEWELLING
REASON FOR REQUEST...WILDFIRE
.TAG 20130818.ALUM_.01/RIW