FNUS75 KRIW 172347 AAA
FWSRIW

SPOT FORECAST FOR CATHEDRAL GROUP...NPS GTP
NATIONAL WEATHER SERVICE RIVERTON WY
121 PM MDT SAT JUL 17 2010

FORECAST IS BASED ON REQUEST TIME OF 1244 MDT ON JULY 17.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...UPDATED TO ADD ISOLATED SHOWERS AND THUNDERSTORMS THROUGH
9 PM TONIGHT.

LIMITED MONSOONAL MOISTURE OVER THE WEEKEND WILL LEAD TO ISOLATED
MAINLY LATE DAY SHOWERS AND THUNDERSTORMS. THE MAIN THREAT FROM
THESE STORMS WILL BE CLOUD TO GROUND LIGHTNING AND GUSTY WINDS TO 40
MPH. THE GENERALLY DRY LOWER LEVELS WILL LEAD TO DIURNAL
TEMPERATURES SWINGS OF 30 DEGREES OR SO.

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

FORECASTER...LIPSON

.REST OF TODAY...
SKY/WEATHER.........PATCHY MID LEVEL CLOUDS HAVE BEEN REPLACED BY SCATTERED
                    CUMULUS DEVELOPMENT. THESE CUMULUS CLOUDS WILL LIKELY
                    BUILD AND EXPAND (45-55 PERCENT) AND PRODUCE
                    A SLIGHT CHANCE OF SHOWERS AND ISOLATED THUNDERSTORMS
                    BEGINNING BETWEEN AROUND 1500 AND 1600. THE LIKELIHOOD
                    OF ANY OF THESE SHOWERS AFFECTING THE FIRE
                    IS SOMEWHAT REMOTE AT THIS TIME.
MAX TEMPERATURE.....82-85.
MIN HUMIDITY........27-30 PERCENT.
WIND (20 FT)........SOUTH SOUTHEAST 5-9 MPH BECOMING SOUTH AROUND
                    12 MPH BY 1500. SOME GUSTS UP TO 20
                    MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    ANY THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
LAL.................2.
CWR.................3 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......10400-11400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 17 TO 22 MPH.
SMOKE DISPERSAL.....EXCELLENT (179200 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY WITH VERY ISOLATED THUNDERSTORMS
                    THROUGH 9 PM...THEN MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....47.
MAX HUMIDITY........78 PERCENT.
WIND (20 FT)........SOUTH WINDS 9 TO 12 MPH AND GUSTY. WINDS BECOMING DOWNSLOPE
                    FROM THE WEST AT 3 TO 5 MPH AFTER MIDNIGHT...EXCEPT GUSTY
                    AND ERRATIC NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....WEST 15 TO 20 MPH.
LAL.................2 UNTIL 2100 THEN 1.
CWR.................1 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......8000-9000 FT AGL DECREASING TO 3400-4400 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST 18 TO 22 MPH.
SMOKE DISPERSAL.....EXCELLENT (156400 KNOT-FT) DECREASING TO GOOD
                    (65800 KNOT-FT) AFTER MIDNIGHT.

.SUNDAY...
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....79-82.
MIN HUMIDITY........26-29 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTH AROUND
                    15 MPH WITH GUSTS TO AROUND 25 MPH BY 1300.
                    GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 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.......6500-7500 FT AGL INCREASING TO 11200-12200 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 16 TO 25 MPH.
SMOKE DISPERSAL.....VERY GOOD (102800 KNOT-FT) INCREASING TO
                    EXCELLENT (216500 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 40S. WEST WINDS
AROUND 12 MPH.
.MONDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS AROUND 80. SOUTHWEST
WINDS AROUND 10 MPH.
.TUESDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS AROUND 80.
WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE
LOWER 80S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...MIKE BENTLEY
REASON FOR REQUEST...WILDFIRE
.TAG 20100717.CATHE.01/RIW