FNUS75 KRIW 290015
FWSRIW

SPOT FORECAST FOR GIBBS...NPS GTP
NATIONAL WEATHER SERVICE RIVERTON WY
615 PM MDT TUE SEP 28 2010

FORECAST IS BASED ON REQUEST TIME OF 1751 MDT ON SEPTEMBER 28.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A RIDGE OF HIGH PRESSURE WILL REMAIN OVER THE REGION THROUGH AT
LEAST THURSDAY. DRY AND UNSEASONABLY WARM CONDITIONS WILL PERSIST
FOR THE NEXT FEW DAYS. THE NEXT CHANCE FOR PRECIPITATION PROBABLY
WILL NOT COME UNTIL LATE IN THE WEEKEND...AND ANY PRECIPITATION
AT THAT TIME WOULD BE MINIMAL.

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

FORECASTER...JONES

.TONIGHT...
SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....40-43.
MAX HUMIDITY........49-52 PERCENT.
20 FOOT WINDS.......WEST-SOUTHWEST WIND 4 TO 7 MPH UNTIL 1830...
                    THEN BECOMING DOWNSLOPE/DOWNVALLEY 4 TO 7 MPH.
RIDGE TOP WINDS.....WEST 12 TO 16 MPH UNTIL 1900...THEN DECREASING
                    TO AROUND 10 MPH BY MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO LESS THAN 1000 FT AGL BY 2100.
TRANSPORT WINDS.....WEST 10 TO 15 MPH UNTIL 1900...THEN BECOMING
                    DOWNSLOPE/DOWNVALLEY 5 TO 8 MPH BY 2100.
SMOKE DISPERSAL.....BECOMING POOR BY 2100.

.WEDNESDAY...
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....70-73.
MIN HUMIDITY........12-15 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 3 TO 7 MPH UNTIL 0800...
                    THEN BECOMING UPSLOPE/UPVALLEY 5 TO 9 MPH
                    BY 1000.
RIDGE TOP WINDS.....WEST-SOUTHWEST AROUND 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......LESS THAN 1000 FT AGL UNTIL 0900...THEN
                    GRADUALLY INCREASING TO AROUND 5000 FT AGL
                    BY 1400.
TRANSPORT WINDS.....DOWNSLOPE/DOWNVALLEY 4 TO 8 MPH UNTIL 0900...
                    THEN BECOMING WEST 8 TO 12 MPH BY 1300.
SMOKE DISPERSAL.....POOR UNTIL 1100...THEN BECOMING FAIR BY 1400.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...CLEAR. LOWS IN THE UPPER 30S. WINDS GENERALLY
LESS THAN 10 MPH.
.THURSDAY...CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 60S.
WINDS GENERALLY LESS THAN 10 MPH.
.FRIDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE
UPPER 60S. WINDS GENERALLY LESS THAN 10 MPH.
.SUNDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...JONES
REQUESTED BY...WORM
REASON FOR REQUEST...WILDFIRE
.TAG 20100928.GIBBS.01/RIW