FNUS75 KRIW 231543
FWSRIW

SPOT FORECAST FOR NORTH ZONE PILES...SHOSHONE NATIONAL FOREST
NATIONAL WEATHER SERVICE RIVERTON WY
943 AM MDT FRI APR 23 2010

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON APRIL 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...PRECIPITATION WILL BE DECREASING DURING THE DAY TODAY
AS THE STRONG LOW PRESSURE CENTER IN EASTERN COLORADO EXITS TOWARD THE
EAST TO THE CENTRAL PLAINS. THE NEXT SHOT OF PRECIPITATION WILL COME SATURDAY
AFTERNOON THROUGH EARLY NEXT WEEK AS A LOW PRESSURE CENTER TRACKING SOUTHEAST
ACROSS EASTERN MONTANA AND THE NORTHERN PLAINS DRAGS A COLD FRONT SOUTH ACROSS
THE AREA. THE BEST CHANCE OF PRECIPITATION WILL BE SUNDAY AND SUNDAY NIGHT.

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

FORECASTER...LIPSON

.TODAY...
SKY/WEATHER.........CLOUDY (85-95 PERCENT). RAIN SHOWERS LIKELY IN
                    THE MORNING...THEN CHANCE OF RAIN IN THE
                    AFTERNOON.
MAX TEMPERATURE.....45-47.
MIN HUMIDITY........50-53 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 10 TO 13 MPH WITH OCCASIONAL
                    GUSTS TO 20 MPH.
RIDGE TOP WINDS.....NORTH AROUND 30 MPH.
LAL.................1.
CWR.................65 PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3400-4400 FT AGL.
TRANSPORT WINDS.....NORTH 20 TO 25 MPH.
SMOKE DISPERSAL.....GOOD (60900-97900 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT).
MIN TEMPERATURE.....AROUND 30.
MAX HUMIDITY........75-78 PERCENT.
WIND (20 FT)........NORTHEAST WINDS AROUND 10 MPH EARLY IN THE
                    EVENING DECREASING TO 4-7 MPH.
RIDGE TOP WINDS.....NORTH 25 TO 30 MPH DECREASING TO 15 TO 20 MPH
                    AFTER MIDNIGHT.
LAL.................1.
CWR.................ZERO PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3200-4100 FT AGL.
TRANSPORT WINDS.....NORTH 14 TO 23 MPH DECREASING TO AROUND 12 MPH
                    EARLY IN THE MORNING.
SMOKE DISPERSAL.....POOR TO GOOD (35600-77700 KNOT-FT).

.SATURDAY...
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT). SLIGHT CHANCE OF
                    RAIN SHOWERS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 60.
MIN HUMIDITY........20-23 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 5-9 MPH BECOMING WEST AROUND
                    11 MPH WITH HIGHER GUSTS LATE IN THE
                    MORNING.
RIDGE TOP WINDS.....NORTHWEST 15 TO 20 MPH.
LAL.................1.
CWR.................LESS THAN 5 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3000-4000 FT AGL INCREASING TO 7000-8000 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 10 TO 14 MPH.
SMOKE DISPERSAL.....POOR (30900 KNOT-FT) INCREASING TO GOOD (85000
                    KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
EVENING...THEN CHANCE OF SHOWERS AND SNOW SHOWERS AFTER MIDNIGHT.
LOWS AROUND 30. WINDS GENERALLY LESS THAN 10 MPH.
.SUNDAY...COOLER. MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 40S. WINDS
GENERALLY LESS THAN 10 MPH.
.MONDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS AROUND 30. HIGHS IN THE MID 50S. WINDS GENERALLY
LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE UPPER 50S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...CLINT DAWSON
REASON FOR REQUEST...PRESCRIBED
.TAG 20100423.NORTH.01/RIW