FNUS75 KRIW 262041 FWSRIW SPOT FORECAST FOR GAMBEL S BASIN...BLM WOD NATIONAL WEATHER SERVICE RIVERTON WY 241 PM MDT FRI APR 26 2013 FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON APRIL 28. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A WEAK SYSTEM WILL MOVE THROUGH ON SUNDAY...DROPPING A COLD FRONT SOUTH INTO THE BURN AREA BETWEEN 1500 AND 1800. THERE IS A DECENT CHANCE OF WETTING RAIN WITH THE FRONT. IN ADDITION...IT WILL BE UNSTABLE AHEAD OF THE FRONT AND A SHOWER OR TWO WITH AN EMBEDDED THUNDERSTORM IS POSSIBLE. SHOWERS WILL END BEFORE MIDNIGHT. TEMPERATURES WILL BE COOL OVERNIGHT WITH GOOD RH RECOVERY INTO MONDAY MORNING. MONDAY WILL BE MUCH WINDIER AS ANOTHER SYSTEM APPROACHES. STRONG WESTERLY FLOW WITH A FEW GUSTS OVER 50 MPH WILL BE POSSIBLE...ESPECIALLY OVER THE HIGHER ELEVATIONS. ANOTHER COLD FRONT PUSHES THROUGH THE AREA MONDAY EVENING...THIS FRONT WILL BE COLDER WITH RAIN CHANGING TO SNOW BY EARLY TUESDAY MORNING. WINDS WILL DECREASE AND SHIFT TO THE NORTH AT AROUND MIDNIGHT WITH FRONTAL PASSAGE. THERE WILL BE VERY GOOD RH RECOVERY OVERNIGHT AGAIN. TUESDAY WILL BE COOL AND MOIST BEHIND THE FRONT WITH LIGHT WINDS. A WARMING AND DRYING TREND BEGINS ON WEDNESDAY AND LASTS THROUGH THE WEEKEND...WITH A SLIGHT CHANCE OF A SHOWER IN THE HIGHER ELEVATIONS ON FRIDAY. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...ALLEN .SUNDAY... SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT). SLIGHT CHANCE OF RAIN SHOWERS THROUGH THE DAY. ISOLATED THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....54-57. MIN HUMIDITY........27-30 PERCENT. 20 FOOT WINDS.......WEST WINDS AROUND 10 MPH EARLY IN THE MORNING BECOMING NORTHWEST 5-9 MPH AFTER 1500...GUSTS UP TO 20 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON. RIDGE TOP WINDS.....WEST 15 TO 20 MPH. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2600-3600 FT AGL INCREASING TO 5100-6100 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST 21 TO 23 MPH. SMOKE DISPERSAL.....FAIR (57700 KNOT-FT) INCREASING TO VERY GOOD (107800 KNOT-FT) IN THE AFTERNOON. .SUNDAY NIGHT... SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING PARTLY CLOUDY (55-65 PERCENT). SLIGHT CHANCE OF RAIN SHOWERS AND ISOLATED THUNDERSTORMS IN THE EVENING. MIN TEMPERATURE.....35-38. MAX HUMIDITY........75-78 PERCENT. 20 FOOT WINDS.......WEST WINDS 10 TO 15 MPH EARLY IN THE EVENING BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH...GUSTS UP TO 25 MPH POSSIBLE BEFORE MIDNIGHT. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE EVENING. RIDGE TOP WINDS.....WEST AROUND 25 MPH DECREASING TO 10 MPH. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4000-5000 FT AGL DECREASING TO 1000-2000 FT AGL AFTER MIDNIGHT. TRANSPORT WINDS.....WEST 18 TO 24 MPH. SMOKE DISPERSAL.....GOOD (87600 KNOT-FT) DECREASING TO POOR (26800 KNOT-FT) AFTER MIDNIGHT. .MONDAY... SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING MOSTLY CLOUDY (65-75 PERCENT). MAX TEMPERATURE.....59-62. MIN HUMIDITY........18-21 PERCENT. 20 FOOT WINDS.......SOUTHWEST WINDS AROUND 10 MPH EARLY IN THE MORNING BECOMING WEST 15 TO 20 MPH IN THE AFTERNOON. GUSTS UP TO 20 MPH INCREASING TO 30 MPH IN THE AFTERNOON. RIDGE TOP WINDS.....WEST 15 TO 20 MPH INCREASING TO AROUND 30 MPH IN THE AFTERNOON. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1800-2800 FT AGL INCREASING TO 3900-4600 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST 17 TO 26 MPH INCREASING TO AROUND 37 MPH IN THE AFTERNOON. SMOKE DISPERSAL.....FAIR (58400 KNOT-FT) INCREASING TO VERY GOOD (126900 KNOT-FT) IN THE AFTERNOON. .FORECAST DAYS 3 THROUGH 5... .MONDAY NIGHT...MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS...SNOW SHOWERS AND ISOLATED THUNDERSTORMS IN THE EVENING...THEN CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. LOWS AROUND 30. WEST WINDS 20 TO 30 MPH BECOMING NORTHWEST 10 TO 15 MPH. .TUESDAY...COLDER. PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS AROUND 20. HIGHS IN THE LOWER 40S. NORTH WINDS 5 TO 10 MPH. .WEDNESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE LOWER 40S. WINDS GENERALLY LESS THAN 10 MPH. .THURSDAY...WARMER. MOSTLY CLEAR. LOWS IN THE UPPER 20S. HIGHS IN THE LOWER 50S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...ALLEN REQUESTED BY...JIM WOLF REASON FOR REQUEST...PRESCRIBED .TAG 20130428.GAMBE.01/RIW