FNUS75 KRIW 051024
FWSRIW

SPOT FORECAST FOR CYGNET...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
424 AM MDT WED SEP 5 2012

FORECAST IS BASED ON REQUEST TIME OF 1803 MDT ON SEPTEMBER 04.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

DRY WESTERLY FLOW WILL CONTINUE FOR ANOTHER DAY...WITH SIMILAR
TEMPERATURES AND HUMIDITY AS YESTERDAY. A STORM SYSTEM PUSHING SOUTH
OUT OF CANADA WILL AFFECT THE AREA THURSDAY AND THURSDAY NIGHT.
THIS SYSTEM WILL RESULT IN HIGHER HUMIDITY AND SLIGHTLY COOLER
TEMPERATURES BOTH THURSDAY AND FRIDAY. THE ASSOCIATED COLD FRONT
SHOULD PUSH ACROSS THE FIRE SITE BETWEEN 3 PM AND 6 PM THURSDAY
AFTERNOON. ISOLATED SHOWERS AND THUNDERSTORMS ARE POSSIBLE
THURSDAY AFTERNOON INTO THURSDAY NIGHT. TEMPERATURES WILL REMAIN
WARM ENOUGH THAT ANY PRECIPITATION THAT FALLS WILL REMAIN RAIN
OVER THE WILDFIRE AREA.

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

FORECASTER...MURRELL

.TODAY...
SKY/WEATHER.........SUNNY (10 PERCENT).
MAX TEMPERATURE.....66.
MIN HUMIDITY........19 PERCENT.
20 FOOT WINDS.......LIGHT AND VARIABLE...BECOMING SOUTHWEST TO
                    WEST AROUND 10 MPH BY AROUND NOON. GUSTS
                    TO 25 MPH IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 5-10 MPH BECOMING WEST 15-20 MPH
                    IN THE EARLY AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......2800 FT AGL INCREASING TO 6500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 5-10 MPH BECOMING WEST 15-20 MPH
                    IN THE EARLY AFTERNOON.
SMOKE DISPERSAL.....POOR INCREASING TO VERY GOOD BY AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (15 PERCENT).
MIN TEMPERATURE.....30.
MAX HUMIDITY........80 PERCENT.
20 FOOT WINDS.......SOUTHWEST 5-10 MPH BECOMING LIGHT AND VARIABLE
                    BY 8 PM.
RIDGE TOP WINDS.....WEST SOUTHWEST 10-20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......6000 FT AGL DECREASING TO 1400 FT AGL BY 8 PM
TRANSPORT WINDS.....WEST SOUTHWEST 10-20 MPH.
SMOKE DISPERSAL.....VERY GOOD DECREASING TO POOR BY 8 PM.

.THURSDAY...
SKY/WEATHER.........PARTLY CLOUDY (30 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (75 PERCENT) WITH ISOLATED SHOWERS
                    AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....62.
MIN HUMIDITY........25-30 PERCENT.
20 FOOT WINDS.......LIGHT AND VARIABLE...BECOMING WEST AROUND 10 MPH
                    BY AROUND NOON...THEN SHIFTING TO THE NORTHWEST
                    AND NORTH BETWEEN 3 PM AND 6 PM. GUSTS TO 25 MPH
                    IN THE AFTERNOON. GUSTY AND ERRATIC WINDS POSSIBLE
                    NEAR ANY THUNDERSTORMS.
RIDGE TOP WINDS.....WEST 10 TO 15 MPH BECOMING NORTHWEST AFTER 3 PM.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......2500 FT AGL INCREASING TO 6000 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 10 TO 15 MPH BECOMING NORTHWEST AFTER 3 PM.
SMOKE DISPERSAL.....POOR INCREASING TO GOOD BY AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...

.THURSDAY NIGHT...MOSTLY CLOUDY. ISOLATED RAIN SHOWERS THROUGH
THE NIGHT. ISOLATED THUNDERSTORMS POSSIBLE IN THE EVENING.
LOWS IN THE MID 30S. NORTH TO NORTHEAST WINDS AROUND 10 MPH THROUGH
MIDNIGHT THEN BECOMING LIGHT AND VARIABLE. GUSTS TO 20 MPH POSSIBLE
THROUGH THE EVENING.

.FRIDAY...MOSTLY CLEAR. LOWS IN THE LOWER 30S. HIGHS IN THE LOWER
60S. WINDS GENERALLY LESS THAN 10 MPH.

.SATURDAY...MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.

.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. 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 20120904.CYGNE.01/RIW