FNUS75 KRIW 130045
FWSRIW

SPOT FORECAST FOR BASIN FIRE...BLM RSD
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT WED AUG 12 2009

FORECAST IS BASED ON REQUEST TIME OF 1830 MDT ON AUGUST 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...FIRE WEATHER WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH
THURSDAY EVENING...

.DISCUSSION...HIGH PRESSURE OVER THE AREA WILL KEEP DRY CONDITIONS
PRESENT THROUGH THURSDAY AFTERNOON. STRONG SOUTHWEST WINDS ALONG WITH THE LOW
HUMIDITY AND SOME DRY LIGHTNING ACROSS SOUTHERN WYOMING THURSDAY AFTERNOON
AND EVENING WILL MAKE FOR POTENTIALLY CRITICAL FIRE WEATHER CONDITIONS.
THEREFORE A FIRE WEATHER WATCH HAS BEEN ISSUED FOR THE FIRE AREA.
SOUTHWEST WIND OF 10 TO 15 MPH WITH GUSTS OF 25 TO 30 MPH WILL BE POSSIBLE
THROUGH THE EVENING HOURS THURSDAY. AN UPPER LEVEL WEATHER DISTURBANCE
WILL BE RESPONSIBLE FOR ISOLATED SHOWERS AND THUNDERSTORMS TO ZONE 279
THURSDAY AFTERNOON. GUSTY WIND IS EXPECTED WITH ANY THUNDERSTORM ACTIVITY.
SLIGHTLY COOLER TEMPERATURES AND SLIGHTLY HIGHER HUMIDITY ARE EXPECTED TO
MOVE IN BEHIND THE THUNDERSTORMS.

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

FORECASTER...LIPSON

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....59-61.
MAX HUMIDITY........32-34 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS AROUND 9 MPH WITH GUSTS TO
                    AROUND 15 MPH EARLY IN THE EVENING BECOMING
                    WEST 10 TO 18 MPH BY 2000. WINDS BECOMING NORTHWEST
                    10 TO 18 MPH BY 2300. THEN WINDS DOWNSLOPE/DOWNVALLEY
                    4-7 MPH BY 1000.
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.......12100 FT AGL DECREASING TO 1400 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 12 TO 17 MPH.
SMOKE DISPERSAL.....EXCELLENT (161500 KNOT-FT) DECREASING TO POOR
                    (15600 KNOT-FT) AFTER MIDNIGHT.

.THURSDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (35-45 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....85-88.
MIN HUMIDITY........14-16 PERCENT.
20 FOOT WINDS.......SOUTHWEST 3 TO 5 MPH INCREASING TO 10 TO 18 MPH
                    BY 1200 AND THEN TO 18 TO 28 MPH BY 1600. GUSTY AND
                    ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN
                    THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1400 FT AGL INCREASING TO 16900 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 13 TO 20 MPH.
SMOKE DISPERSAL.....POOR (15600 KNOT-FT) INCREASING TO EXCELLENT
                    (252500 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...PARTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE
EVENING. LOWS IN THE MID 50S. SOUTHWEST WINDS AROUND 11 MPH.
.FRIDAY...PARTLY CLOUDY WITH SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE LOWER 80S.
SOUTHWEST WINDS AROUND 10 MPH.
.SATURDAY...NOT AS WARM. MOSTLY CLOUDY. SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER
70S. WINDS GENERALLY LESS THAN 10 MPH.
.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S. WINDS
GENERALLY LESS THAN 10 MPH.
.MONDAY...PARTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE MID
70S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...JEREMY BRADLEY
REASON FOR REQUEST...WILDFIRE
.TAG 20090812.BASIN.02/RIW