FNUS75 KRIW 200949
FWSRIW

SPOT FORECAST FOR ALUM...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
349 AM MDT TUE AUG 20 2013

FORECAST IS BASED ON REQUEST TIME OF 2053 MDT ON AUGUST 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

ONE MORE DAY WITH A LOW...BUT NOT ZERO...CHANCE OF WETTING RAIN. THE
RIDGE IS BEGINNING TO BREAK DOWN AND ALLOW SOME MOISTURE BACK INTO
THE AREA. THERE IS A GOOD CHANCE OF SHOWERS AND THUNDERSTORMS BEGINNING
ON WEDNESDAY AND CONTINUING THROUGH FRIDAY...WITH A DRYING TREND
POSSIBLE FOR THE WEEKEND AS FLOW RETURNS SOUTHWEST.

TEMPERATURES WILL BE A FEW DEGREES COOLER TODAY BUT WILL STILL BE
ABOVE NORMAL. CLOUD COVER SHOULD BE FAIRLY EXTENSIVE THIS MORNING
WITH SOME CLEARING THIS AFTERNOON. THE CLEARING SHOULD ALLOW FOR SOME
AFTERNOON CUMULUS TO POP UP BUT THERE WILL BE A BETTER CHANCE FOR
SHOWERS AND THUNDERSTORMS WELL EAST AND SOUTH OF THE FIRE. SOME OF
THESE FAR OFF STORMS COULD LEAD TO SOME ERRATIC WIND GUSTS THIS
AFTERNOON.

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

FORECASTER...ALLEN

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (45-55 PERCENT).
MAX TEMPERATURE.....76.
MIN HUMIDITY........20 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST
                    7-12 MPH AFTER 1200. GUSTY AND ERRATIC
                    WINDS EXPECTED DUE TO NEARBY THUNDERSTORMS
                    IN THE AFTERNOON.
RIDGE TOP WINDS.....WEST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT). ISOLATED RAIN
                    SHOWERS AFTER MIDNIGHT.
MIN TEMPERATURE.....48.
MAX HUMIDITY........65 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....SOUTHWEST 5 TO 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.4 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.WEDNESDAY...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (65-75 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS AFTER 0900...THEN WIDELY
                    SCATTERED SHOWERS AND THUNDERSTORMS AFTER 1200.
MAX TEMPERATURE.....72.
MIN HUMIDITY........30 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTS UP TO 15 MPH
                    EARLY IN THE AFTERNOON. GUSTY AND ERRATIC WINDS
                    EXPECTED NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTH 5 TO 10 MPH SHIFTING TO THE SOUTHWEST 10
                    TO 15 MPH IN THE AFTERNOON.
LAL.................1 UNTIL 0900...THEN 3.
CHC OF WETTING RAIN.27 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...MOSTLY CLOUDY. SCATTERED SHOWERS AND
THUNDERSTORMS IN THE EVENING BECOMING ISOLATED. LOWS IN THE LOWER
40S. WINDS GENERALLY LESS THAN 10 MPH.
.THURSDAY...MOSTLY CLOUDY WITH SCATTERED SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE MID 70S. WINDS
GENERALLY LESS THAN 10 MPH.
.FRIDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS AROUND 40. HIGHS IN THE MID 70S. WINDS GENERALLY LESS THAN
10 MPH.
.SATURDAY...PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 70S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...ALLEN
REQUESTED BY...IC- MIKE LEWELLING
REASON FOR REQUEST...WILDFIRE
.TAG 20130819.ALUM_.01/RIW