FNUS75 KRIW 150954
FWSRIW

SPOT FORECAST FOR HARDLUCK...IA TDC
NATIONAL WEATHER SERVICE RIVERTON WY
354 AM MDT THU AUG 15 2013

FORECAST IS BASED ON REQUEST TIME OF 2030 MDT ON AUGUST 14.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A VERY DRY AIRMASS WILL SETTLE IN OVER THE AREA TODAY INTO FRIDAY.
VERY LOW RELATIVE HUMIDITIES ARE EXPECTED DURING THE AFTERNOON AND
EVENING. NO THUNDERSTORMS ARE EXPECTED TODAY OR FRIDAY. NO SIGNIFICANT
WINDS ARE EXPECTED BUT THE DRY AIRMASS WILL ALLOW FOR GOOD MIXING AND
STRONG HEATING WILL LIKELY CREATE STRONGER THAN NORMAL DIURNAL WINDS
WITH MOUNTAIN TOP WINDS MIXING DOWN AT TIMES.

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

FORECASTER...SKRBAC

.TODAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT) THEN BECOMING PARTLY
                    CLOUDY (30-40 PERCENT).
MAX TEMPERATURE.....73-76 AT 8K AND 62-66 AT 10,400 FEET.
MIN HUMIDITY........9-13 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 6-9 MPH. GUSTS UP TO 15 MPH IN
                    THE AFTERNOON.
RIDGE TOP WINDS.....WEST 5 TO 10 MPH INCREASING TO 15 TO 20 MPH IN
                    THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5500-6500 FT AGL INCREASING TO 10000-11000 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 8 TO 16 MPH INCREASING TO AROUND 18 MPH
                    LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD (70300 KNOT-FT) INCREASING TO EXCELLENT
                    (185300 KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).
MIN TEMPERATURE.....34-39 VALLEY FLOOR AND 40-45 MID AND UPPER ELEVATIONS.
MAX HUMIDITY........48-51 PERCENT MID AND UPPER ELEVATIONS WITH 75-85
                    VALLEY FLOOR.
20 FOOT WINDS.......WEST WINDS AROUND 8 MPH WITH GUSTS TO AROUND 15
                    MPH EARLY IN THE EVENING BECOMING
                    DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....WEST 10 TO 15 MPH SHIFTING TO THE SOUTHWEST AFTER
                    MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......6300-7300 FT AGL DECREASING TO 1000-1500 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....WEST 15 TO 18 MPH SHIFTING TO THE SOUTHWEST AROUND
                    10 MPH AFTER MIDNIGHT.
SMOKE DISPERSAL.....VERY GOOD (107700 KNOT-FT) DECREASING TO POOR
                    (1500 KNOT-FT) AFTER MIDNIGHT.

.FRIDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....74-77 AT 8K AND 63-67 AT 10,400 FEET.
MIN HUMIDITY........7-10 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTS UP TO 15 MPH IN
                    THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4700-5700 FT AGL INCREASING TO 10200-10700 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 14 TO 17 MPH.
SMOKE DISPERSAL.....GOOD (66700 KNOT-FT) INCREASING TO EXCELLENT
                    (155000 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 40S. WINDS
GENERALLY LESS THAN 10 MPH.
.SATURDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS AROUND 80. WINDS
GENERALLY LESS THAN 10 MPH.
.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE MID 70S. WINDS
GENERALLY LESS THAN 10 MPH.
.MONDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 70S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...SKRBAC
REQUESTED BY...CLINT DAWSON
REASON FOR REQUEST...WILDFIRE
.TAG 20130814.HARDL.01/RIW