FNUS75 KRIW 192114
FWSRIW

SPOT FORECAST FOR LUNCH...IA TDC
NATIONAL WEATHER SERVICE RIVERTON WY
314 PM MDT SUN SEP 19 2010

FORECAST IS BASED ON IGNITION TIME OF 1510 MDT ON SEPTEMBER 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
BREEZY AND WARM CONDITIONS WILL CONTINUE OVER THE BURN SITE INTO
THE EVENING HOURS. WIND WILL REMAIN ELEVATED INTO THE OVERNIGHT
HOURS...WITH HUMIDITY RECOVERING AFTER SUNSET. AN APPROACHING
COLD FRONT WILL MOVE OVER THE BURN SITE BETWEEN 0100 AND 0400
TONIGHT. THIS WILL BRING ANOTHER PUSH TO INCREASE WIND SPEED.
ADDITIONALLY...THIS FRONT WILL BRING COOLER TEMPERATURES AND
ELEVATED HUMIDITY ACROSS THE BURN SITE FOR MONDAY AFTERNOON. SHOWER
ACTIVITY IS NOT EXPECTED WITH THIS FRONTAL PASSAGE ACROSS THE BURN
SITE. IMPACTS OF THE COLD FRONT WILL LESSEN BY MONDAY EVENING...
WITH TUESDAY SEEING THE RETURN OF WARMING TEMPERATURES AND
LOWERING HUMIDITY.


...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS...
...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT...

FORECASTER...BRANHAM

.TODAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....68-72.
MIN HUMIDITY........10-15 PERCENT.
20 FOOT WINDS.......25-30 MPH WITH GUSTS TO AROUND 45.
RIDGE TOP WINDS.....SOUTHWEST 30 TO 35 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4700-5700 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 35 TO 40 MPH.
SMOKE DISPERSAL.....EXCELLENT (159100 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....34-38.
MAX HUMIDITY........55-60 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 25 TO 30...INCREASING TO
                    40 MPH AS A RESULT OF A FRONTAL PASSAGE BETWEEN
                    0100 AND 0400. GUSTS TO AROUND 50 MPH WILL BE
                    POSSIBLE.
RIDGE TOP WINDS.....SOUTHWEST 30 TO 35 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH...DECREASING TO 4 AFTER
                    0400.
MIXING HEIGHT.......DECREASING TO 600-1100 FT AGL AFTER 0200.
TRANSPORT WINDS.....SOUTHWEST 35 TO 40 MPH.
SMOKE DISPERSAL.....DECREASING TO POOR (32200 KNOT-FT) AFTER 0200.

.MONDAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (35-45 PERCENT) AFTER 1200.
MAX TEMPERATURE.....56-60.
MIN HUMIDITY........26-30 PERCENT.
20 FOOT WINDS.......WEST WINDS 15 TO 20 MPH. GUSTS UP TO 40 MPH.
RIDGE TOP WINDS.....WEST 25 TO 30 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 5300-6300 FT AGL AFTER 1400.
TRANSPORT WINDS.....WEST 25 TO 30 MPH.
SMOKE DISPERSAL.....INCREASING TO VERY GOOD (144700 KNOT-FT)
                    AFTER 1400.

.FORECAST DAYS 3 THROUGH 5...
.MONDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 30S. WEST WINDS
AROUND 16 MPH.
.TUESDAY...MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE LOWER
60S. SOUTHWEST WINDS AROUND 15 MPH.
.WEDNESDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND SNOW
SHOWERS. LOWS IN THE LOWER 30S. HIGHS AROUND 60. SOUTHWEST WINDS
AROUND 16 MPH.
.THURSDAY...PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN THE
MID 50S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...BRANHAM
REQUESTED BY...WAGNER
REASON FOR REQUEST...PRESCRIBED
.TAG 20100919.LUNCH.01/RIW