FNUS75 KRIW 252220
FWSRIW

SPOT FORECAST FOR BEACH FIRE...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
420 PM MDT SUN JUL 25 2010

FORECAST IS BASED ON REQUEST TIME OF 1539 MDT ON JULY 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A DRY AND STABLE AIR MASS WILL REMAIN OVER THE AREA TONIGHT.
MONSOONAL MOISTURE WILL SURGE NORTHWARD MONDAY WITH THE BULK OF THIS
MOISTURE AND INSTABILITY REMAINING TO THE WEST OVER IDAHO...
ISOLATED AFTERNOON THUNDERSTORMS PUSHING TO THE VICINITY OF THE
WESTERN BORDER AND NW YELLOWSTONE NATIONAL PARK AND MAY GRAZE THE FIRE.
TEMPERATURES WILL TREND SLIGHTLY COOLER AND RELATIVE HUMIDITY SLIGHTLY
HIGHER MONDAY WITH INCREASING CLOUD COVER.  THE MONSOONAL PLUME OF MOISTURE
WILL SHIFT FURTHER EAST MONDAY NIGHT THROUGH WEDNESDAY WITH ISOLATED
THUNDERSTORMS POSSIBLE OVERNIGHT MONDAY...BLOSSOMING INTO SCATTERED
THUNDERSTORMS DURING THE HEAT OF THE DAY TUESDAY AND WEDNESDAY WITH
BETTER CHANCES OF WETTING RAINS.

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

FORECASTER...LIPSON

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT). ISOLATED THUNDERSTORMS
                    AFTER 1200.
MIN TEMPERATURE.....39.
MAX HUMIDITY........75-78 PERCENT.
WIND (20 FT)........WEST WINDS 9 TO 12 MPH IN THE EVENING BECOMING
                    DOWNSLOPE FROM THE NORTHWEST 4 MPH.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH SHIFTING TO THE SOUTH
                    LATE IN THE NIGHT.
LAL.................1.
CWR.................ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......7400-8400 FT AGL DECREASING TO 2400-3200 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 17 TO 22 MPH SHIFTING TO THE SOUTH
                    AROUND 16 MPH LATE IN THE NIGHT.
SMOKE DISPERSAL.....VERY GOOD (140000 KNOT-FT) DECREASING TO FAIR
                    (41900 KNOT-FT) AFTER MIDNIGHT.

.MONDAY...
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (40-50 PERCENT).
MAX TEMPERATURE.....77.
MIN HUMIDITY........23-25 PERCENT.
WIND (20 FT)........LIGHT AND VARIABLE BECOMING SOUTHEAST OFF THE LAKE 10
                    TO 14 MPH. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR ANY THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
LAL.................1 UNTIL 1200...THEN 2.
CWR.................LESS THAN 5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4900-5900 FT AGL INCREASING TO 9100-10100 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 17 TO 24 MPH.
SMOKE DISPERSAL.....GOOD (80100 KNOT-FT) INCREASING TO EXCELLENT
                    (170300 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.MONDAY NIGHT...PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS
IN THE EVENING...THEN ISOLATED SHOWERS AFTER MIDNIGHT. LOWS IN
THE MID 40S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY WITH SCATTERED SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS AROUND 70. SOUTH
WINDS AROUND 10 MPH.
.WEDNESDAY...MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 60S.
WINDS GENERALLY LESS THAN 10 MPH.
.THURSDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS AROUND 70. WINDS
GENERALLY LESS THAN 10 MPH.
.FRIDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS AROUND 40. HIGHS IN THE UPPER 60S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...EDWIN FOLTS
REASON FOR REQUEST...WILDFIRE
.TAG 20100725.BEACH.01/RIW