FNUS75 KRIW 061440 FWSRIW SPOT FORECAST FOR LITTLE BROWN FIRE...IA TDC NATIONAL WEATHER SERVICE RIVERTON WY 840 AM MDT SUN SEP 6 2009 FORECAST IS BASED ON REQUEST TIME OF 0814 MDT ON SEPTEMBER 06. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... INCREASED MONSOONAL MOISTURE THIS MORNING AND AFTERNOON WILL BRING ISOLATED SHOWERS AND THUNDERSTORMS OVER THE FIRE. WITH INCREASED CLOUD COVER THIS MORNING...TEMPERATURES WILL BE SLIGHTLY COOLER TODAY WITH SLIGHTLY ELEVATED HUMIDITY. IN ADDITION TO LIGHTNING... THUNDERSTORMS THIS AFTERNOON WILL HAVE THE POTENTIAL TO BRING GUSTY WIND TO 40 MPH OVER THE FIRE. AS MONSOONAL MOISTURE DECREASES OVER THE AREA LATER THIS AFTERNOON...SHOWERS ARE EXPECTED TO DISSIPATE BY THE EARLY EVENING HOURS. HOWEVER...ANOTHER PUSH OF MONSOONAL MOISTURE WILL CAUSE ISOLATED RAIN SHOWERS TO REDEVELOP DURING THE EARLY MORNING HOURS OF MONDAY. SHOWER COVERAGE WILL INCREASE MONDAY AFTERNOON BRINGING ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS OVER THE FIRE THROUGH THE EVENING HOURS. GUSTY WIND AND LIGHTNING WILL AGAIN BE THE PRIMARY THREAT OF THUNDERSTORM ACTIVITY. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...BRANHAM .TODAY... SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). ISOLATED RAIN SHOWERS AND THUNDERSTORMS THROUGH 1800. MAX TEMPERATURE.....70-74. MIN HUMIDITY........21-26 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST 10 TO 15 MPH WITH HIGHER GUSTS AFTER 1300. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH INCREASING TO 18 TO 22 MPH BY 1500. LAL.................2. CHC OF WETTING RAIN.6 PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......INCREASING TO 9800 FT AGL BY 1400. TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH. SMOKE DISPERSAL.....FAIR TO GOOD (52700-82900 KNOT-FT). .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT). ISOLATED RAIN SHOWERS REDEVELOPING BY 0100. MIN TEMPERATURE.....40-45. MAX HUMIDITY........58-63 PERCENT. 20 FOOT WINDS.......SOUTHWEST WINDS 7 TO 10 MPH WITH GUSTS TO AROUND 15 MPH THROUGH 2200 BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH. RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH SHIFTING TO THE SOUTH BY 0300. LAL.................1. CHC OF WETTING RAIN.3 PERCENT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......DECREASING TO 1000 FT AGL BY 0200. TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH...SHIFTING TO THE SOUTH BY 0200. SMOKE DISPERSAL.....POOR TO FAIR (9400-56500 KNOT-FT). .LABOR DAY... SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). ISOLATED SHOWERS AND THUNDERSTORMS BY 1400. MAX TEMPERATURE.....67-71. MIN HUMIDITY........20-24 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST 10 TO 15 MPH WITH HIGHER GUSTS BY 1300. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH. LAL.................1 UNTIL 1400...THEN 2. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......INCREASING TO 6700 FT AGL BY 1400. TRANSPORT WINDS.....SOUTHWEST 13 TO 18 MPH. SMOKE DISPERSAL.....POOR (39500 KNOT-FT) INCREASING TO GOOD (96300 KNOT-FT) IN THE AFTERNOON. .FORECAST DAYS 3 THROUGH 5... .MONDAY NIGHT...PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS IN THE EVENING...THEN ISOLATED SHOWERS AFTER MIDNIGHT. LOWS IN THE UPPER 30S. WINDS GENERALLY LESS THAN 10 MPH. .TUESDAY...PARTLY CLOUDY. ISOLATED SHOWERS IN THE MORNING. LOWS IN THE UPPER 30S. HIGHS IN THE MID 60S. WINDS GENERALLY LESS THAN 10 MPH. .WEDNESDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 60S. WINDS GENERALLY LESS THAN 10 MPH. .THURSDAY...PARTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE MID 70S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...BRANHAM REQUESTED BY...LANCASTER REASON FOR REQUEST...WILDFIRE .TAG 20090906.LITTL.01/RIW