FNUS75 KRIW 081014 FWSRIW SPOT FORECAST FOR CYGNET...WY-YNP NATIONAL WEATHER SERVICE RIVERTON WY 414 AM MDT SAT SEP 8 2012 FORECAST IS BASED ON REQUEST TIME OF 1943 MDT ON SEPTEMBER 07. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...HIGH PRESSURE WILL BE OVER THE AREA TODAY AND TONIGHT. LIGHT WIND AND ONLY A FEW CLOUDS ARE EXPECTED TODAY. ON SUNDAY CLOUDS WILL DEVELOP IN THE AFTERNOON WITH ISOLATED SHOWERS OR A THUNDERSTORM AFTER 1500 SUNDAY AFTERNOON THROUGH SUNDAY NIGHT. AN AFTERNOON WIND WILL DEVELOP AS WELL SUNDAY AFTERNOON WHICH COMBINED WITH LOW RELATIVE HUMIDITY WILL LIKELY INCREASE FIRE ACTIVITY. THE WIND WILL STAY UP SUNDAY NIGHT INTO MONDAY ALONG WITH THE SLIGHT CHANCE OF SHOWERS AND ISOLATED THUNDERSTORMS. ONE WOULD EXPECT ERRATIC WIND GUSTS TO 40 MPH SUNDAY NIGHT AND MONDAY NEAR ANY SHOWERS OR STORMS. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...AR .TODAY... SKY/WEATHER.........SUNNY. A FEW AFTERNOON CLOUDS. MAX TEMPERATURE.....68-73. MIN HUMIDITY........17-21 PERCENT. 20 FOOT WINDS.......VARIABLE AT 3 TO 6 MPH UNTIL 1100. THEN WEST TO SOUTHWEST AT 6 TO 10 MPH AFTER 1100. RIDGE TOP WINDS.....VARIABLE AT 4 TO 8 MPH UNTIL 1100. THEN WEST TO SOUTHWEST AT 8 TO 12 MPH WITH GUSTS AROUND 15 MPH AFTER 1100. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......INCREASING TO 5500-6500 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....BECOMING WEST TO SOUTHWEST AT 10 MPH BY 1200. WEST TO SOUTHWEST AT 10 TO 15 MPH AFTER 1200. SMOKE DISPERSAL.....BECOMING FAIR BY 1200...THEN BECOMING GOOD BY 1400. .TONIGHT... SKY/WEATHER.........A FEW EVENING CLOUDS...THEN CLEAR. MIN TEMPERATURE.....34-38. MAX HUMIDITY........78-83 PERCENT. 20 FOOT WINDS.......WEST TO SOUTHWEST WIND AT 6 TO 10 MPH UNTIL 1900. THEN BECOMING DOWNSLOPE/DOWNVALLEY AT 4 TO 7 MPH BY MIDNIGHT. RIDGE TOP WINDS.....WEST TO SOUTHWEST AT 8 TO 13 MPH. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......DECREASING TO 1000-2000 FT AGL AFTER MIDNIGHT. TRANSPORT WINDS.....WEST TO SOUTHWEST AROUND 10 MPH. SMOKE DISPERSAL.....BECOMING FAIR BY SUNSET...THEN POOR AFTER SUNSET. .SUNDAY... SKY/WEATHER.........MOSTLY SUNNY IN THE MORNING. INCREASING CLOUD COVER AFTER 1300. SLIGHT CHANCE OF RAIN SHOWERS AND ISOLATED THUNDERSTORMS AFTER 1500. MAX TEMPERATURE.....69-74. MIN HUMIDITY........15-20 PERCENT. 20 FOOT WINDS.......VARIABLE AT 4 TO 7 MPH UNTIL 1000. THEN SOUTHWEST AT 8 TO 13 MPH AFTER 1000 WITH GUSTS 15 TO 20 MPH. GUSTY AND ERRATIC WINDS TO 40 MPH EXPECTED NEAR SHOWERS AND THUNDERSTORMS AFTER 1500. RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH UNTIL 1000. THEN SOUTHWEST AT 15 TO 20 MPH WITH GUSTS 25 TO 30 MPH AFTER 1000. LAL.................1 UNTIL 1500...THEN 2. CHC OF WETTING RAIN.LESS THAN 5 PERCENT. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......INCREASING TO 5700-6700 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST TO SOUTHWEST AROUND 15 MPH UNTIL 1200. WEST TO SOUTHWEST AROUND 25 MPH AFTER 1200. SMOKE DISPERSAL.....BECOMING GOOD BY 1200...BECOMING EXCELLENT BY 1400. .FORECAST DAYS 3 THROUGH 5... .SUNDAY NIGHT...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND ISOLATED THUNDERSTORMS. LOWS 35 TO 40. SOUTHWEST WIND AROUND 10 MPH. .MONDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS IN THE MID TO UPPER 60S. WEST TO SOUTHWEST WIND 15 TO 20 MPH WITH GUSTS AROUND 25 MPH. .TUESDAY...COOLER. MOSTLY CLEAR. LOWS IN THE MID 20S. HIGHS IN THE MID 50S. WINDS GENERALLY LESS THAN 10 MPH. .WEDNESDAY...CLEAR. LOWS IN THE MID 20S. HIGHS IN THE LOWER 60S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...ROSS REQUESTED BY...LAURA DOOLEY REASON FOR REQUEST...WILDFIRE .TAG 20120907.CYGNE.01/RIW