FNUS75 KRIW 302253
FWSRIW

SPOT FORECAST FOR ROBBERS...IA CDC
NATIONAL WEATHER SERVICE RIVERTON WY
453 PM MDT MON JUL 30 2012

FORECAST IS BASED ON REQUEST TIME OF 1627 MDT ON JULY 30.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

WIDELY SCATTERED SHOWERS CURRENTLY IMPACTING THE WESTERN MOUNTAINS
THIS AFTERNOON. THESE STORMS ARE ANTICIPATED TO CONTINUE THROUGH
THE EVENING HOURS. SOME SHOWER ACTIVITY MAY MOVE OVER THE
FIRE...PRODUCING GUSTY WIND TO 40 MPH AND LIGHTNING. DRY
CONDITIONS GENERALLY EXPECTED AFTER MIDNIGHT...AS THE ATMOSPHERE
STABILIZES. ANOTHER SURGE OF MOISTURE WILL IMPACT THE WESTERN
MOUNTAINS ON TUESDAY AND WEDNESDAY. ANOTHER ROUND OF ISOLATED
SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE OVER THE FIRE DURING
THE AFTERNOON HOURS OF BOTH DAYS...WITH SIMILAR THREATS TO THOSE
STORMS THIS EVENING. A DRIER...WESTERLY FLOW IS ANTICIPATED OVER
THE FIRE LATER IN THE WEEK...WHICH SHOULD PROMOTE DRY CONDITIONS
OVER THE FIRE ON THURSDAY BEFORE STORMS RETURN FRIDAY.

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

FORECASTER...BRANHAM

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) BECOMING MOSTLY
                    CLEAR BY 0200. ISOLATED SHOWERS AND
                    THUNDERSTORMS THROUGH AROUND 2300.
MIN TEMPERATURE.....55-58.
MAX HUMIDITY........34-43 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH BECOMING WEST
                    8 TO 12 MPH AND GUSTY BY 0300. GUSTY AND
                    ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHEAST AROUND 5 MPH SHIFTING TO THE WEST 11
                    TO 18 MPH AFTER 2400.
LAL.................2 UNTIL 2300...THEN 1.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......9400-10400 FT AGL DECREASING TO 7600 FT AGL
                    BY 0200.
TRANSPORT WINDS.....SOUTHEAST AROUND 9 MPH SHIFTING TO THE WEST 12
                    TO 18 MPH AFTER 2400.
SMOKE DISPERSAL.....VERY GOOD (105500-107600 KNOT-FT).

.TUESDAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT) THEN BECOMING PARTLY
                    CLOUDY (35-45 PERCENT) AFTER 1100. ISOLATED
                    SHOWERS AND THUNDERSTORMS AFTER 1200.
MAX TEMPERATURE.....81-84.
MIN HUMIDITY........14-17 PERCENT.
20 FOOT WINDS.......WEST WINDS AT 10 TO 15 MPH. GUSTS UP TO 22 MPH.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS.
RIDGE TOP WINDS.....WEST 15 TO 20 MPH.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........INCREASING TO 6 OR HIGH POTENTIAL FOR LARGE
                    PLUME DOMINATED FIRE GROWTH AFTER 1200.
MIXING HEIGHT.......8100-9100 FT AGL INCREASING TO 10900-12900 FT
                    AGL AFTER 1400.
TRANSPORT WINDS.....WEST 16 TO 21 MPH.
SMOKE DISPERSAL.....VERY GOOD TO EXCELLENT (131700-168500 KNOT-FT).

.TUESDAY NIGHT...
SKY/WEATHER.........PARTLY CLOUDY (20-30 PERCENT).
MIN TEMPERATURE.....55-58.
MAX HUMIDITY........39-42 PERCENT.
20 FOOT WINDS.......WEST 8 TO 12 MPH...INCREASING TO 20 TO 25 MPH
                    AFTER 0300. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....WEST 11 TO 18 MPH...INCREASING TO AROUND 25 MPH
                    AFTER 0300.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH...DECREASING TO 5 OR MODERATE
                    POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH
                    BY 0100.
MIXING HEIGHT.......9400-10400 FT AGL DECREASING TO 5600 FT AGL
                    AFTER 0200.
TRANSPORT WINDS.....WEST 8 TO 12 MPH...INCREASING TO 20 TO 25 MPH
                    AFTER 0200.
SMOKE DISPERSAL.....VERY GOOD (106500-140000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...

.WEDNESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS AROUND 80. WEST WINDS
AROUND 12 MPH.

.THURSDAY...MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE MID
70S. WINDS GENERALLY LESS THAN 10 MPH.

.FRIDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...BRANHAM
REQUESTED BY...CDC
REASON FOR REQUEST...WILDFIRE
.TAG 20120730.ROBBE.01/RIW