FNUS75 KRIW 191201
FWSRIW

SPOT FORECAST FOR BULL...IA TDC
NATIONAL WEATHER SERVICE RIVERTON WY
601 AM MDT THU AUG 19 2010

FORECAST IS BASED ON REQUEST TIME OF 1825 MDT ON AUGUST 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

A WEAK COLD FRONT WILL MOVE ACROSS WESTERN WYOMING TODAY. SLIGHTLY
COOLER TEMPERATURES...AND SLIGHTLY HIGHER RELATIVE HUMIDITY IS
EXPECTED OVER THE FIRE SITE TODAY. HOWEVER...BREEZY WESTERLY WINDS
WILL CONTINUE TODAY. ISOLATED SHOWERS AND THUNDERSTORMS ARE
POSSIBLE THROUGH LATE THIS AFTERNOON. DRY AND WARM
CONDITIONS...WITH SLIGHTLY WEAKER WINDS ARE EXPECTED FRIDAY.
CRITICAL FIRE WEATHER CONDITIONS ARE POSSIBLE OVER THE UPCOMING
WEEKEND...WITH WINDY...WARM AND VERY LOW RELATIVE HUMIDITY.

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

FORECASTER...MURRELL

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY (85 PERCENT) BECOMING PARTLY
                    CLOUDY (45 PERCENT) BY AFTERNOON. ISOLATED
                    SHOWERS AND THUNDERSTORMS TODAY.
MAX TEMPERATURE.....68-72.
MIN HUMIDITY........19-23 PERCENT.
WIND (20 FT)........WEST 4-8 MPH BECOMING WEST 8-12 MPH BETWEEN
                    NOON AND 1400. GUSTS TO 20 MPH. GUSTY AND
                    ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....WEST 6 TO 11 MPH INCREASING TO AROUND 15 MPH
                    BY 1400. GUSTS TO 25 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
LAL.................2.
CWR.................LESS THAN 5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2800 FT AGL INCREASING TO 8300 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 15 TO 20 MPH.
SMOKE DISPERSAL.....FAIR INCREASING TO EXCELLENT IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
MIN TEMPERATURE.....43-46.
MAX HUMIDITY........AROUND 60 PERCENT.
WIND (20 FT)........WEST SOUTHWEST 4-8 MPH...BECOMING
                    DOWNSLOPE/DOWNVALLEY 3-6 MPH AROUND 2100.
RIDGE TOP WINDS.....WEST 10-15 MPH...DECREASING TO 5-10 MPH BY 2100.
LAL.................1.
CWR.................ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5000-6000 FT AGL DECREASING TO 1100 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST 10-15 MPH...DECREASING TO 5-10 MPH BY 2100.
SMOKE DISPERSAL.....VERY GOOD DECREASING TO POOR BY MIDNIGHT.

.FRIDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....70-75.
MIN HUMIDITY........15-20 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 4-8 MPH BECOMING WEST SOUTHWEST
                    5-10 MPH BY AROUND 1400. GUSTS TO 15 MPH.
RIDGE TOP WINDS.....LIGHT SOUTHEAST SHIFTING TO THE SOUTHWEST 5-10
                    MPH BETWEEN 1000 AND NOON...THEN INCREASING TO
                    10-15 MPH BY 1500. GUSTS TO 25 MPH IN THE AFTERNOON.
LAL.................1.
CWR.................ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......2300 FT AGL INCREASING TO 8000 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST SOUTHWEST 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR INCREASING TO VERY GOOD IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...MOSTLY CLEAR. PATCHY SMOKE AFTER MIDNIGHT. LOWS
IN THE UPPER 40S. WINDS GENERALLY LESS THAN 10 MPH.

.SATURDAY...MOSTLY CLEAR. PATCHY SMOKE IN THE MORNING. ISOLATED
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE
MID 70S. WEST TO SOUTHWEST WINDS 10 TO 20 MPH. GUSTS TO 30 MPH.

.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS AROUND 70. WEST TO
SOUTHWEST WINDS 10 TO 20 MPH. GUSTS TO 30 MPH.

.MONDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MURRELL
REQUESTED BY...TIDC
REASON FOR REQUEST...WILDFIRE
.TAG 20100818.BULL_.01/RIW