FNUS75 KRIW 210230
FWSRIW

SPOT FORECAST FOR WHO KNOWS...BLM
NATIONAL WEATHER SERVICE RIVERTON WY
830 PM MDT SAT JUL 20 2013

FORECAST IS BASED ON REQUEST TIME OF 1945 MDT ON JULY 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...MAINLY DRY WEATHER WILL BE THE RULE INTO THE WEEKEND AND EARLY NEXT
WEEK AS HIGH PRESSURE BUILDS INTO THE AREA. THE RELATIVE HUMIDITY
WILL BE ONE OF THE MOST CRITICAL ELEMENTS WITH THE RH DECREASING
TO THE UPPER SINGLE DIGITS BY MONDAY AFTERNOON. TEMPERATURES SHOULD
REMAIN WITHIN A FEW DEGREES OF SEASONAL AVERAGES INTO SUNDAY WITH
SOMEWHAT WARMER TEMPERATURES FOR MONDAY.

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

FORECASTER...LIPSON

.REST OF TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (25-35 PERCENT).
MIN TEMPERATURE.....60-63.
MAX HUMIDITY........40-45 PERCENT.
20 FOOT WINDS.......AN EAST NORTHEAST WIND OF 8 TO 12 MPH WILL LIKELY
                    BECOME ESTABLISHED AROUND 2100 AND WILL GRADUALLY
                    VEER TO THE EAST BY MIDNIGHT. THEN THE WINDS WILL DIMINISH
                    TO 2 TO 4 MPH FROM THE SOUTHEAST BY 0300.
RIDGE TOP WINDS.....NORTH AROUND 15 MPH BECOMING EAST AROUND 5 MPH
                    AFTER MIDNIGHT...THEN SHIFTING TO THE SOUTH
                    LATE IN THE NIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......8400-9400 FT AGL DECREASING TO 3200-4200 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....LIGHT AND VARIABLE WINDS BECOMING SOUTHEAST 5
                    TO 10 MPH IN THE LATE EVENING AND OVERNIGHT.
SMOKE DISPERSAL.....POOR (24700-39100 KNOT-FT).

.SUNDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....AROUND 90.
MIN HUMIDITY........9-11 PERCENT.
20 FOOT WINDS.......LIGHT AND VARIABLE 1 TO 3 MPH BECOMING WEST NORTHWEST
                    5 TO 10 MPH BY 0900...INCREASING TO 10 TO 16 MPH BY 1200.
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH SHIFTING TO THE NORTHWEST
                    LATE IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3100-4100 FT AGL INCREASING TO 9000-10000 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 8 MPH SHIFTING TO THE WEST 6
                    TO 12 MPH IN THE LATE MORNING AND EARLY
                    AFTERNOON...THEN BECOMING LIGHT AND VARIABLE
                    LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR TO GOOD (27100-74300 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 60S. WINDS
GENERALLY LESS THAN 10 MPH.
.MONDAY...MOSTLY CLEAR. LOWS IN THE LOWER 60S. HIGHS IN THE LOWER
90S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...MOSTLY CLEAR. LOWS IN THE LOWER 60S. HIGHS IN THE
UPPER 80S. WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...PARTLY CLOUDY. LOWS IN THE LOWER 60S. HIGHS IN THE
UPPER 80S. WINDS GENERALLY LESS THAN 10 MPH.
.THURSDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS AROUND 60. HIGHS IN THE LOWER 80S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...WILLIAMSON
REASON FOR REQUEST...WILDFIRE
.TAG 20130720.WHOKN.01/RIW