FNUS75 KRIW 141015 FWSRIW SPOT FORECAST FOR HOLIDAY...BLM RSD NATIONAL WEATHER SERVICE RIVERTON WY 415 AM MDT TUE MAY 14 2013 FORECAST IS BASED ON REQUEST TIME OF 1625 MDT ON MAY 13. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... IT WILL BE DRY...WARM AND BREEZY AT TIMES TODAY. THE COMBINATION OF WARM TEMPERATURES AND LOW DEW POINTS WILL CREATE VERY LOW RELATIVE HUMIDITIES DURING THE AFTERNOON AND EARLY EVENING. THERE IS A WEAK COLD FRONT THAT WILL TRY TO MAKE IT SOUTHWARD TOWARD THE FIRE TONIGHT BUT IT MAY STAY JUST TO THE NORTH. ON WEDNESDAY...IT WILL CONTINUE BREEZY AND TIMES WITH LOW RELATIVE HUMIDITIES AND A SLIGHT CHANCE OF A GUSTY SHOWER OR THUNDERSTORM IN THE LATE AFTERNOON. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...SKRBAC .TODAY... SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT). MAX TEMPERATURE.....78-80. MIN HUMIDITY........12-15 PERCENT. 20 FOOT WINDS.......WEST TO SOUTHWEST 5-10 MPH BECOMING WEST 10-13 MPH IN THE AFTERNOON WITH GUSTS UP TO 25 MPH. RIDGE TOP WINDS.....WEST 10-15 MPH WITH GUSTS TO 25 MPH IN THE AFTERNOON. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......6000-7000 FT AGL INCREASING TO 12000-13000 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST 12 TO 15 MPH...BECOMING 15-20 MPH IN THE AFTERNOON. SMOKE DISPERSAL.....GOOD (72000-100000 KNOT-FT) INCREASING TO EXCELLENT (180000-240000 KNOT-FT) IN THE AFTERNOON. .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT). MIN TEMPERATURE.....49-52. MAX HUMIDITY........43-50 PERCENT. 20 FOOT WINDS.......WEST WINDS 9 TO 13 MPH WITH GUSTS TO 18 MPH IN THE EVENING BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH. RIDGE TOP WINDS.....WEST 10-15 MPH SHIFTING TO THE NORTH AT 5-10 MPH AROUND MIDNIGHT...THEN SHIFTING TO THE NORTHWEST TOWARDS MORNING. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......7600-8600 FT AGL DECREASING TO 1000-2000 FT AGL AFTER MIDNIGHT. TRANSPORT WINDS.....NORTHWEST 9 TO 12 MPH SHIFTING TO THE NORTH AROUND 6 MPH AFTER MIDNIGHT...THEN SHIFTING TO THE WEST EARLY IN THE MORNING. SMOKE DISPERSAL.....GOOD (80600 KNOT-FT) DECREASING TO POOR (9000 KNOT-FT) AFTER MIDNIGHT. .WEDNESDAY... SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT). ISOLATED SHOWERS AND THUNDERSTORMS AFTER 1500L. MAX TEMPERATURE.....74-77. MIN HUMIDITY........14-17 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING WEST AROUND 13 MPH WITH GUSTS TO AROUND 25 MPH AFTER 1400L. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON. RIDGE TOP WINDS.....WEST 5 TO 10 MPH INCREASING TO 15 TO 20 MPH IN THE AFTERNOON. LAL.................1 UNTIL 1500...THEN 2. CHC OF WETTING RAIN.LESS THAN 5 PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4100-5100 FT AGL INCREASING TO 10000 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST 8 TO 14 MPH INCREASING TO AROUND 20 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....FAIR-GOOD (47100-70000 KNOT-FT) INCREASING TO EXCELLENT (200000 KNOT-FT) IN THE AFTERNOON. .FORECAST DAYS 3 THROUGH 5... .WEDNESDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 40S. WINDS GENERALLY LESS THAN 10 MPH. .THURSDAY...PARTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE MID 70S. WINDS GENERALLY LESS THAN 10 MPH. .FRIDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND ISOLATED THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 70S. SOUTHWEST WINDS AROUND 10 MPH. .SATURDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 60S. WEST WINDS AROUND 12 MPH. $$ FORECASTER...SKRBAC REQUESTED BY...HOLIDAY IC REASON FOR REQUEST...WILDFIRE .TAG 20130513.HOLID.02/RIW