FNUS75 KRIW 161954
FWSRIW

SPOT FORECAST FOR CATHEDRAL GROUP...NPS GTP
NATIONAL WEATHER SERVICE RIVERTON WY
154 PM MDT FRI JUL 16 2010

FORECAST IS BASED ON REQUEST TIME OF 1315 MDT ON JULY 16.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...WARMER THAN NORMAL DAYTIME TEMPERATURES AND
LOW RELATIVE HUMIDITY ARE EXPECTED TODAY AND SATURDAY WITH LARGE HIGH
PRESSURE OVER THE FOUR CORNERS IN CONTROL. A WEAK COLD FRONT WILL MOVE
SOUTHWARD ACROSS YELLOWSTONE PARK SATURDAY MORNING...BEFORE
STALLING ACROSS THE FIRE AREA SATURDAY AFTERNOON. EXPECT SCATTERED
SHOWERS AND THUNDERSTORMS WITH A VERY SLIGHT CHANCE OF WETTING
RAINFALL ACROSS THE FIRE AREA SATURDAY AFTERNOON AND EVENING.

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

FORECASTER...LIPSON

.REST OF TODAY...
SKY/WEATHER.........SUNNY (5-10 PERCENT).
MAX TEMPERATURE.....83-86.
MIN HUMIDITY........18-20 PERCENT.
WIND (20 FT)........SOUTH SOUTHWEST 10 TO 15 MPH WITH GUSTS UP TO 20 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 TO 20 MPH.
LAL.................1.
CWR.................ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......9500-10500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 17 TO 20 MPH.
SMOKE DISPERSAL.....EXCELLENT (174600 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....AROUND 34.
MAX HUMIDITY........75 PERCENT.
WIND (20 FT)........SOUTH SOUTHWEST 5 TO 10 MPH EXCEPT SOUTH SOUTHWEST
                    10 TO 18 MPH BETWEEN 2230 AND 0130.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
LAL.................1.
CWR.................ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......7200-8200 FT AGL DECREASING TO 2700-3300 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 17 TO 22 MPH.
SMOKE DISPERSAL.....VERY GOOD (140300 KNOT-FT) DECREASING TO FAIR
                    (49400 KNOT-FT) AFTER MIDNIGHT.

.SATURDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (45-55 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....83-86.
MIN HUMIDITY........18-20 PERCENT.
WIND (20 FT)........SOUTH SOUTHWEST 5 TO 8 MPH BECOMING SOUTHWEST
                    10 TO 17 MPH WITH GUSTS TO AROUND 25 MPH. GUSTY AND
                    ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN
                    THE AFTERNOON.
RIDGE TOP WINDS.....WEST AROUND 10 MPH INCREASING TO AROUND 20 MPH.
LAL.................1 UNTIL 1200...THEN 2.
CWR.................3 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5800-6800 FT AGL INCREASING TO 10300-11300 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST AROUND 14 MPH SHIFTING TO THE SOUTHWEST 14
                    TO 23 MPH IN THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....GOOD (79600 KNOT-FT) INCREASING TO EXCELLENT
                    (176000 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 40S. WEST WINDS
AROUND 12 MPH.
.SUNDAY...MOSTLY CLEAR WITH ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS IN THE MID 40S. HIGHS IN THE LOWER 80S. SOUTHWEST WINDS
AROUND 11 MPH.
.MONDAY...MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS. 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...LIPSON
REQUESTED BY...RON STEFFFENS
REASON FOR REQUEST...WILDFIRE
.TAG 20100716.CATHE.01/RIW