FNUS75 KRIW 041018
FWSRIW

SPOT FORECAST FOR CYGNET COMPLEX...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
418 AM MDT TUE SEP 4 2012

FORECAST IS BASED ON REQUEST TIME OF 1740 MDT ON SEPTEMBER 03.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

ANOTHER DRY AND MILD DAY WILL OCCUR WITH SIMILAR TEMPERATURES AND
HUMIDITY TO WHAT OCCURRED ON LABOR DAY. ALTHOUGH WINDS WILL MAINLY
BE WEST AFTER THE MORNING INVERSION BREAKS...WINDS ARE EXPECTED TO
BECOME NORTHWEST AFTER 3 PM AS A WEAK DISTURBANCE PASSES ACROSS
MONTANA. VERY SIMILAR CONDITIONS WILL OCCUR ON WEDNESDAY...EXCEPT
WINDS ARE EXPECTED TO REMAIN WEST TO SOUTHWEST.

A STRONGER STORM SYSTEM WILL SKIRT THE AREA THURSDAY WITH A WEAK COLD
FRONT MOVING ACROSS THE REGION...WITH WINDS SHIFTING TO THE NORTHWEST
AND BECOMING GUSTY. PRECIPITATION WILL REMAIN LIMITED WITH THIS
SYSTEM...WILL ONLY A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
LATE THURSDAY INTO THURSDAY NIGHT.

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

FORECASTER...MURRELL

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (15 PERCENT)...BECOMING PARTLY
                    CLOUDY (50 PERCENT) IN THE AFTERNOON.
MAX TEMPERATURE.....65.
MIN HUMIDITY........15-20 PERCENT.
20 FOOT WINDS.......LIGHT AND VARIABLE WINDS...BECOMING WEST
                    AROUND 10 MPH BY NOON. WINDS SHIFTING TO THE
                    NORTHWEST AFTER 3 PM. GUSTS TO 25 MPH IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....WEST AROUND 10 MPH...INCREASING TO 15 TO 20 MPH
                    IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......800 FT AGL INCREASING TO 7600 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....WEST 15 TO 25 MPH.
SMOKE DISPERSAL.....POOR INCREASING TO VERY GOOD BY AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....30-35.
MAX HUMIDITY........85 PERCENT.
20 FOOT WINDS.......NORTHWEST 5-10 MPH...BECOMING NORTH 4-8 MPH
                    BY AROUND 8 PM...THEN LIGHT AND VARIABLE AFTER
                    MIDNIGHT.
RIDGE TOP WINDS.....NORTHWEST 5-10 MPH SHIFTING TO THE SOUTHWEST
                    AFTER MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......7600 FT AGL DECREASING TO 1500 FT AGL BY 8 PM.
TRANSPORT WINDS.....NORTHWEST 5-10 MPH SHIFTING TO THE SOUTHWEST
                    AFTER MIDNIGHT.
SMOKE DISPERSAL.....VERY GOOD DECREASING TO POOR BY 8 PM.

.WEDNESDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....65.
MIN HUMIDITY........15-20 PERCENT.
20 FOOT WINDS.......LIGHT AND VARIABLE BECOMING WEST AROUND 10 MPH
                    BY EARLY AFTERNOON. GUSTS TO 20 MPH IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....WEST SOUTHWEST 15-20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1300 FT AGL INCREASING TO 6800 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....WEST SOUTHWEST 15-20 MPH.
SMOKE DISPERSAL.....POOR INCREASING TO VERY GOOD BY AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...

.WEDNESDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 30S. WINDS
GENERALLY LESS THAN 10 MPH.

.THURSDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND
THUNDERSTORMS. HIGHS IN THE MID 60S. WEST TO NORTHWEST WINDS
10-15 MPH. GUSTS 20 TO 30 MPH.

.FRIDAY...PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.

.SATURDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS AROUND 70.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MURRELL
REQUESTED BY...LAURA DOOLEY
REASON FOR REQUEST...WILDFIRE
.TAG 20120903.CYGNE.02/RIW