FNUS75 KRIW 191444
FWSRIW

SPOT FORECAST FOR PORCUPINE FIRE...IA TDC
NATIONAL WEATHER SERVICE RIVERTON WY
844 AM MDT WED AUG 19 2009

FORECAST IS BASED ON REQUEST TIME OF 0803 MDT ON AUGUST 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...DRY WEATHER WILL BE THE RULE. RIDGE BUILDS IN TONIGHT
BRINGING IN WARM AND VERY DRY CONDITIONS.  TEMPERATURES WILL REBOUND
TO NEAR NORMAL VALUES AND RH'S WILL BE IN THE TEENS AND 20S. MONSOONAL MOISTURE
WILL INCREASE SATURDAY WITH THE THUNDERSTORM THREAT RETURNING AND
CONTINUING INTO THE UPCOMING WEEK.

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

FORECASTER...LIPSON

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....68-71.
MIN HUMIDITY........21-23 PERCENT.
20 FOOT WINDS.......SOUTHWEST 5-9 MPH BECOMING WEST 11
                    TO 14 MPH WITH GUSTS TO AROUND 25 MPH BY 1200.                 LATE MORNING AND
RIDGE TOP WINDS.....NORTHWEST 15 TO 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
MIN TEMPERATURE.....AROUND 40.
MAX HUMIDITY........57-60 PERCENT.
20 FOOT WINDS.......WEST WINDS 12 TO 14 MPH WITH GUSTS TO AROUND 25
                    MPH IN THE EVENING DECREASING TO 8 TO 12 MPH BY 2100.
                    WINDS BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH BY 0200.
RIDGE TOP WINDS.....WEST AROUND 20 MPH DECREASING TO AROUND 10 MPH
                    AFTER MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.THURSDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....70-73.
MIN HUMIDITY........19-22 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 2-4 MPH BECOMING WEST SOUTHWEST BY 1500
                    AT 5 TO 9 MPH.
RIDGE TOP WINDS.....EAST AROUND 10 MPH SHIFTING TO THE WEST 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...
.THURSDAY NIGHT...CLEAR. LOWS IN THE MID 40S. WINDS GENERALLY
LESS THAN 10 MPH.
.FRIDAY...MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID
70S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE MID 70S. WINDS
GENERALLY LESS THAN 10 MPH.
.SUNDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...CODY MCFARLAND
REASON FOR REQUEST...WILDFIRE
.TAG 20090819.PORCU.01/RIW