FNUS75 KRIW 121210 FWSRIW SPOT FORECAST FOR BULL...IA TDC NATIONAL WEATHER SERVICE RIVERTON WY 610 AM MDT THU AUG 12 2010 FORECAST IS BASED ON REQUEST TIME OF 1859 MDT ON AUGUST 11. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A VIGOROUS WEATHER SYSTEM AND COLD FRONT WILL MOVE ACROSS THE FIRE AREA TODAY RESULTING IN GUSTY...SHIFTING WINDS...NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS AND FALLING AFTERNOON TEMPERATURES. MINIMUM RH'S WILL BE IN THE 20S THIS MORNING BUT LIKELY RISE WITH AFTERNOON SHOWERS. FRIDAY WILL BE DRY WITH LESS WIND. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...SKRBAC .TODAY... SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING MOSTLY CLOUDY (70-80 PERCENT). ISOLATED SHOWERS AND THUNDERSTORMS IN THE MORNING...THEN NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....58-62 BY AROUND NOON THEN STEADY OR FALLING DURING AFTERNOON IN SHOWERS AND THUNDERSTORMS. MIN HUMIDITY........24-28 PERCENT...HIGHER IN THE AFTERNOON. WIND (20 FT)........SOUTHWEST 6-12 MPH...BECOMING WEST AND INCREASING TO 12-15 MPH BY LATE MORNING WITH GUSTS AROUND 20 MPH IN THE AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED NEAR SHOWERS AND THUNDERSTORMS. RIDGE TOP WINDS.....SOUTH 8-14 MPH SHIFTING TO THE WEST LATE IN THE MORNING AND INCREASING TO 15-20 MPH WITH GUSTS AROUND 25 MPH. LAL.................2 UNTIL 1200...THEN 4. CWR.................30 PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......3000-4000 FT AGL INCREASING TO 6000-7000 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTHWEST 8 TO 12 MPH SHIFTING TO THE WEST AROUND 15 MPH IN THE AFTERNOON. SMOKE DISPERSAL.....POOR TO GOOD (35000-65000 KNOT-FT). .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT) THEN BECOMING CLEAR (5-15 PERCENT). SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS IN THE EVENING. MIN TEMPERATURE.....36-41. MAX HUMIDITY........62-70 PERCENT. WIND (20 FT)........NORTHWEST 6-12 MPH...BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH AFTER 2000L. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE EVENING. RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH. LAL.................2 UNTIL 2100...THEN 1. CWR.................7 PERCENT. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4000-4500 FT AGL DECREASING TO 1200-1800 FT AGL AFTER MIDNIGHT. TRANSPORT WINDS.....NORTHWEST 8 TO 12 MPH. SMOKE DISPERSAL.....FAIR EARLY THEN BECOMING POOR (45000-15000 KNOT-FT). .FRIDAY... SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT) THEN BECOMING PARTLY CLOUDY (30-40 PERCENT). MAX TEMPERATURE.....61-66. MIN HUMIDITY........25-30 PERCENT. WIND (20 FT)........UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST IN THE AFTERNOON. RIDGE TOP WINDS.....WEST TO SOUTHWEST 10 TO 15 MPH. LAL.................1. CWR.................ZERO PERCENT. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2400-3400 FT AGL INCREASING TO 5300-6300 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST TO SOUTHWEST 6-8 MPH...BECOMING 8-12 MPH IN THE AFTERNOON. SMOKE DISPERSAL.....POOR (38500 KNOT-FT) INCREASING TO GOOD (60000 KNOT-FT) IN THE AFTERNOON. .FORECAST DAYS 3 THROUGH 5... .FRIDAY NIGHT...PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE LOWER 40S. WINDS GENERALLY LESS THAN 10 MPH. .SATURDAY...MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE MID 60S. WINDS GENERALLY LESS THAN 10 MPH. .SUNDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE MID 60S. WINDS GENERALLY LESS THAN 10 MPH. .MONDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...SKRBAC REQUESTED BY...BULL FIRE IC REASON FOR REQUEST...WILDFIRE .TAG 20100811.BULL_.01/RIW