FNUS75 KRIW 192351
FWSRIW

SPOT FORECAST FOR CEDAR FIRE...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
551 PM MDT SAT SEP 19 2009

FORECAST IS BASED ON REQUEST TIME OF 1700 MDT ON SEPTEMBER 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...ISOLATED TO WIDELY SCATTERED THUNDERSTORMS CONTINUED
TO MOVE SOUTHEAST FROM IDAHO INTO THE AREA LATE THIS AFTERNOON.  THE
BACK EDGE AND MORE STABLE AIRMASS WILL PUSH INTO THE AREA BETWEEN
1930 AND 2000.

A WEAK COLD FRONT WILL SAG SOUTH ACROSS EASTERN IDAHO OVERNIGHT WITH A FEW
SHOWERS...A FEW HUNDREDTHS OF RAINFALL...POSSIBLE OVERNIGHT.  A STRONGER
COLD FRONT WILL MOVE THROUGH THE AREA AROUND MIDDAY SUNDAY USHERING IN GUSTY
NORTHWEST WIND ALONG WITH A DRIER AIRMASS.


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

FORECASTER...MEUNIER

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). ISOLATED
                    THUNDERSTORMS THROUGH 2000 THEN ISOLATED RAIN
                    SHOWERS THROUGH THE NIGHT.
MIN TEMPERATURE.....45-48.
MAX HUMIDITY........60-65 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS AROUND 8 MPH WITH GUSTS TO
                    AROUND 15 MPH EARLY IN THE EVENING BECOMING
                    DOWNSLOPE/DOWNVALLEY OR SOUTHEAST 4 TO 7 MPH 2000 TO 2200.
                    GUSTY AND ERRATIC WINDS TO 40 MPH EXPECTED NEAR
                    THUNDERSTORMS THROUGH 2000.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH VEERING TO THE WEST OVERNIGHT.
LAL.................2 UNTIL 2000 THEN 1.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.SUNDAY...
SKY/WEATHER.........MOSTLY CLOUDY EARLY AND THEN CLEARING RAPIDLY IN THE
                    AFTERNOON.  ISOLATED SHOWERS IN THE MORNING...UNTIL FRONTAL
                    PASSAGE AROUND 1200.
MAX TEMPERATURE.....AROUND 70.
MIN HUMIDITY........24-27 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY OR SOUTH 5-9 MPH BECOMING WEST NORTHWEST
                    11 TO 16 MPH WITH GUSTS TO AROUND 30 MPH AROUND NOON.
RIDGE TOP WINDS.....WEST 5 TO 10 MPH INCREASING TO AROUND 25 MPH AT NOON.
LAL.................1.
CHC OF WETTING RAIN.9 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...COLDER. PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS
IN THE EVENING. LOWS IN THE MID 30S. NORTHWEST WINDS AROUND
10 MPH.
.MONDAY...COOLER. MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE
UPPER 50S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...WARMER. MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN
THE LOWER 70S. WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...MOSTLY CLEAR. LOWS AROUND 40. HIGHS IN THE LOWER
70S. WINDS GENERALLY LESS THAN 10 MPH.
.THURSDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID
70S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...WM  ROLLER
REASON FOR REQUEST...WILDFIRE
.TAG 20090919.CEDAR.01/RIW