FNUS75 KRIW 161152
FWSRIW

SPOT FORECAST FOR CATHEDRAL GROUP...IA TDC
NATIONAL WEATHER SERVICE RIVERTON WY
551 AM MDT FRI JUL 16 2010

FORECAST IS BASED ON REQUEST TIME OF 1948 MDT ON JULY 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A STRONG RIDGE OF HIGH PRESSURE OVER THE FOUR
CORNERS REGION WILL EXPAND NORTHWARD TODAY.  THIS WILL BRING
A WARMER AIRMASS INTO THE AREA WITH SOME MID AND HIGH LEVEL CLOUDS AND VIRGA
MOVING IN LATE THIS AFTERNOON AND EVENING.  GUSTY OUTFLOW WINDS MAY OCCUR
AS A RESULT.

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

FORECASTER...MEUNIER

.TODAY...
SKY/WEATHER.........SUNNY (0-5 PERCENT) THEN BECOMING PARTLY CLOUDY
                    (30-40 PERCENT) AFTER 1600.
MAX TEMPERATURE.....80-83.
MIN HUMIDITY........16-19 PERCENT.
WIND (20 FT)........SOUTH 3-7 MPH BECOMING SOUTH SOUTHWEST AROUND 10 MPH
                    WITH GUSTS TO 20 MPH AROUND 1500. ERRATIC GUSTS
                    OF 20 TO 25 MPH POSSIBLE AFTER 1700 FROM NEARBY
                    HIGH-BASED SHOWERS...MOST PROBABLE DIRECTION
                    FROM WEST TO NORTHWEST.
RIDGE TOP WINDS.....SOUTH SOUTHWEST 5 TO 10 MPH THIS MORNING.
                    SOUTHWEST 15 MPH THIS AFTERNOON.
LAL.................1.
CWR.................ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1500-2000 FT AGL INCREASING TO 9500-10500 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH SOUTHWEST 5 TO 10 MPH IN THE MORNING...
                    WEST SOUTHWEST 25 TO 30 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (20000 KNOT-FT) INCREASING TO EXCELLENT
                    (250000 KNOT-FT) BY 1500 IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........78-81 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 12 TO 14 MPH WITH GUSTS TO
                    AROUND 25 MPH UNTIL 2000...ERRATIC GUSTS
                    MOST LIKELY FROM WEST TO NORTHWEST POSSIBLE FROM
                    NEARBY HIGH-BASED SHOWERS.  BECOMING DOWN VALLEY
                    DOWN SLOPE 4-7 MPH AROUND MIDNIGHT.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH DECREASING TO AROUND 10
                    MPH EARLY IN THE MORNING.
LAL.................1.
CWR.................ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......7300-8300 FT AGL DECREASING TO 2300-3300 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 12 TO 21 MPH.
SMOKE DISPERSAL.....VERY GOOD (121900 KNOT-FT) DECREASING TO POOR
                    (34900 KNOT-FT) AFTER MIDNIGHT.

.SATURDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (45-55 PERCENT). SLIGHT CHANCE OF
                    RAIN SHOWERS AND ISOLATED THUNDERSTORMS IN THE
                    AFTERNOON.
MAX TEMPERATURE.....82-85.
MIN HUMIDITY........17-20 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 5-9 MPH BECOMING WEST 10 TO 14
                    MPH WITH GUSTS TO AROUND 25 MPH IN THE
                    AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....EAST AROUND 10 MPH SHIFTING TO THE SOUTH LATE
                    IN THE MORNING...THEN SHIFTING TO THE WEST 15
                    TO 20 MPH IN THE AFTERNOON.
LAL.................1 UNTIL 1200...THEN 2.
CWR.................LESS THAN 5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4700-5700 FT AGL INCREASING TO 8900-9900 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....EAST AROUND 9 MPH SHIFTING TO THE SOUTH LATE IN
                    THE MORNING...THEN SHIFTING TO THE WEST 16 TO
                    21 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (41600 KNOT-FT) INCREASING TO VERY GOOD
                    (129400 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 40S. SOUTHWEST
WINDS AROUND 14 MPH.
.SUNDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS IN THE MID 40S. HIGHS IN THE LOWER 80S. WINDS GENERALLY LESS
THAN 10 MPH.
.MONDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER
70S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 70S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...RON STEFFFENS
REASON FOR REQUEST...WILDFIRE
.TAG 20100715.CATHE.02/RIW