FNUS75 KRIW 122037
FWSRIW

SPOT FORECAST FOR RAMSHORN PEAK...IA CDC
NATIONAL WEATHER SERVICE RIVERTON WY
237 PM MDT SAT SEP 12 2009

FORECAST IS BASED ON REQUEST TIME OF 1348 MDT ON SEPTEMBER 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...AS THE LOW PRESSURE CENTER SPINNING OVER SOUTHWEST SOUTH DAKOTA
TRACKS WEST INTO CENTRAL WYOMING TONIGHT AND THEN TAKES A TURN NORTH
INTO MONTANA SUNDAY...THERE WILL BE AN INCREASING RISK OF ISOLATED SHOWERS
AND A FEW THUNDERSTORMS THIS EVENING THROUGH SUNDAY MORNING. ON SUNDAY A
TRANSITORY RIDGE WILL ESTABLISH OVER SUNDAY BETWEEN THE EXITING LOW
TO THE NORTH AND AN APPROACHING LOW PRESSURE CENTER APPROACHING FROM
THE PACIFIC. STEERING WINDS WILL THEN SHIFT FROM AN EASTERLY
COMPONENT TO A SOUTHWESTERLY COMPONENT. THESE SOUTHWEST WINDS WILL
EVENTUALLY ALLOW MOISTURE TO ADVECT IN FROM THE SOUTHWEST FOR
ISOLATED SHOWERS AND THUNDERSTORMS TO DEVELOP BY MONDAY...BECOMING
MORE NUMEROUS TUESDAY ALONG WITH INCREASING COVERAGE OF THE THESE
SHOWERS FROM SOUTHWEST TO NORTHEAST AS THE LOW STRENGTHENS OVER UTAH.

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

FORECASTER...LIPSON

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS IN THE EVENING...THEN
                    ISOLATED SNOW SHOWERS AFTER MIDNIGHT.
MIN TEMPERATURE.....33-36.
MAX HUMIDITY........93-96 PERCENT.
20 FOOT WINDS.......WINDS BECOMING SOUTHEAST AROUND 8 MPH WITH GUSTS TO AROUND
                    15 MPH IN THE EVENING. SOUTHEAST WINDS DECREASING
                    TO 4-7 MPH AFTER MIDNIGHT.
RIDGE TOP WINDS.....EAST 10 TO 15 MPH.
LAL.................2 UNTIL 2400...THEN 1.
CHC OF WETTING RAIN.3 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.SUNDAY...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (65-75 PERCENT).
MAX TEMPERATURE.....62-64.
MIN HUMIDITY........30-33 PERCENT.
20 FOOT WINDS.......SOUTH 5-9 MPH BECOMING SOUTHWEST AROUND 13 MPH WITH
                    HIGHER GUSTS TO 25 MPH LATE IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH INCREASING TO AROUND 20 TO 25 MPH
                    MPH LATE IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...MOSTLY CLOUDY. LOWS IN THE UPPER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
.MONDAY...MOSTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 60S.
WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY. CHANCE OF SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS AROUND 60. WINDS
GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.
.THURSDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...BOB EVANS
REASON FOR REQUEST...WILDFIRE
.TAG 20090912.RAMSH.01/RIW