FNUS75 KRIW 262216
FWSRIW

SPOT FORECAST FOR BEACH FIRE...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
416 PM MDT MON JUL 26 2010

FORECAST IS BASED ON REQUEST TIME OF 1605 MDT ON JULY 26.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...CONSIDERABLE HIGH AND MIDDLE CLOUDS ARE EXPECTED
FOR THE REST OF THE AFTERNOON. THEN ANOTHER WEAK DISTURBANCE TRACKING NORTHEAST
FROM NEVADA AND UTAH WILL INTRODUCE A THREAT OF ISOLATED HIGH BASED
THUNDERSTORMS TONIGHT WITH THE PRIMARY THREAT BEING BRIEF GUSTY
WINDS AND LIGHTNING. ON TUESDAY ANOTHER DISTURBANCE WILL DRAW IN
DEEPER MONSOON MOISTURE FOR A BETTER CHANCE OF MORE WIDESPREAD
THUNDERSTORM ACTIVITY TUESDAY AFTERNOON AND EVENING ALONG WITH AN
INCREASING CHANCE OF A WETTING RAIN. 1800 TO 2400 HOURS WILL BE THE
-TIME FRAME TUESDAY EVENING FOR THE HIGHEST CHANCE OF THUNDERSTORMS.

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

FORECASTER...LIPSON

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT). ISOLATED
                    THUNDERSTORMS IN THE EVENING. ISOLATED RAIN
                    SHOWERS THROUGH THE NIGHT.
MIN TEMPERATURE.....42-45.
MAX HUMIDITY........85-88 PERCENT.
WIND (20 FT)........WINDS BECOMING WEST AROUND 11 MPH EARLY IN THE
                    EVENING THEN SHIFTING TO THE NORTH AT 8 TO 10 MPH BY 2100.
                    WINDS LIGHT AND VARIABLE AT 2-4 BY MIDNIGHT.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR ANY THUNDERSTORMS IN
                    THE EVENING.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
LAL.................2.
CWR.................3 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5200-6200 FT AGL DECREASING TO 800-1600 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 17 TO 22 MPH.
SMOKE DISPERSAL.....VERY GOOD (102600 KNOT-FT) DECREASING TO POOR
                    (19900 KNOT-FT) AFTER MIDNIGHT.

.TUESDAY...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT). ISOLATED RAIN
                    SHOWERS IN THE MORNING...THEN SCATTERED RAIN
                    SHOWERS AND ISOLATED THUNDERSTORMS IN THE
                    AFTERNOON.
MAX TEMPERATURE.....72.
MIN HUMIDITY........33 PERCENT.
WIND (20 FT)........LIGHT AND VARIABLE 2 TO 4 MPH BECOMING SOUTHWEST
                    AROUND 12 MPH BY 0900. WINDS SLOWLY VEERING TO THE NORTH
                    AT 3 TO 6 MPH BETWEEN 1500 AND 1800. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
LAL.................1 UNTIL 1200...THEN 2.
CWR.................12 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3200-4200 FT AGL INCREASING TO 6600-7300 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 20 TO 23 MPH.
SMOKE DISPERSAL.....GOOD (67600 KNOT-FT) INCREASING TO VERY GOOD
                    (127400 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.TUESDAY NIGHT...PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS IN THE LOWER 40S. WINDS GENERALLY LESS THAN
10 MPH.
.WEDNESDAY...MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS AROUND 70. WINDS
GENERALLY LESS THAN 10 MPH.
.THURSDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS AROUND 70. SOUTHWEST
WINDS AROUND 10 MPH.
.FRIDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 70S.
WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...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 20100726.BEACH.01/RIW