FNUS75 KRIW 230025
FWSRIW

SPOT FORECAST FOR BEACH FIRE...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
625 PM MDT THU JUL 22 2010

FORECAST IS BASED ON REQUEST TIME OF 1751 MDT ON JULY 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...DRY WEATHER TONIGHT THROUGH SATURDAY. THE AIRMASS WILL
STABLE FOR THE MOST PART THROUGH SATURDAY. AS LOW PRESSURE MOVES ACROSS
EASTERN MONTANA FRIDAY...WEST WINDS WILL DEVELOP IN THE AFTERNOON
WITH GUSTS TO BETWEEN 20 AND 25 MPH IN OPEN AREAS. HIGH PRESSURE WILL
BRING LIGHT WIND TO THE REGION SATURDAY.

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

FORECASTER...AR

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....38 TO 43.
MAX HUMIDITY........75 TO 80 PERCENT.
WIND (20 FT)........SOUTH TO SOUTHWEST AT 4 TO 8 MPH.
                    WIND BECOMING VARIABLE AT 3 TO 5 MPH BY MIDNIGHT
RIDGE TOP WINDS.....WEST TO SOUTHWEST 10 TO 15 MPH WITH GUSTS
                    AROUND 20 MPH.
LAL.................1.
CWR.................ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4000 FT AGL DECREASING TO 1000 FEET AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST AT 14 MPH.
SMOKE DISPERSAL.....FAIR DECREASING TO POOR BY 11 PM.

.FRIDAY...
SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....66 TO 71.
MIN HUMIDITY........20 TO 25 PERCENT.
WIND (20 FT)........VARIABLE AT 3 TO 5 MPH UNTIL 10 AM...THEN SOUTH TO
                    SOUTHWEST WEST AT 6 TO 10 MPH WITH GUSTS TO 15 MPH
                    AFTER 10 AM AND THROUGH THE AFTERNOON.
RIDGE TOP WINDS.....WEST TO SOUTHWEST AT 7 TO 12 MPH IN THE MORNING.
                    WEST TO SOUTHWEST AT 13 TO 18 MPH WITH GUSTS 25 MPH
                    AFTER 12 PM AND THROUGH THE AFTERNOON.
LAL.................1.
CWR.................ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 5000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST AT 20 MPH.
SMOKE DISPERSAL.....BECOMING FAIR IN THE MORNING...THEN BECOMING
                    VERY GOOD IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...

.FRIDAY NIGHT...CLEAR. LOWS 35 TO 40. VARIABLE WIND DIRECTION
AND SPEEDS UNDER 10 MPH.

.SATURDAY...MOSTLY SUNNY. HIGHS 70 TO 75. WINDS GENERALLY
LESS THAN 10 MPH.

.SUNDAY...MOSTLY CLEAR. LOWS IN THE LOWER 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 LOWER 40S. HIGHS 70 TO 75.
WINDS GENERALLY LESS THAN 10 MPH.

.TUESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 60S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...ROSS
REQUESTED BY...EDWIN FOLTS
REASON FOR REQUEST...WILDFIRE
.TAG 20100722.BEACH.01/RIW