FNUS75 KCYS 201246
FWSCYS

SPOT FORECAST FOR ROTHLEUTNER...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
646 AM MDT SUN MAR 20 2011

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON MARCH 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
ANOTHER DRY DAY IN STORE AT THE BURN SITE AS HIGH PRESSURE BUILDS
IN. CLOUDS WILL CONTINUE TO EXIT NORTHEAST INTO SOUTH
DAKOTA...GIVING WAY TO MOSTLY SUNNY SKIES AFTER 8 OR 9 AM. EXPECT
THE NEXT BATCH OF CLOUDS TO HOLD OFF UNTIL AROUND 4 PM...THOUGH
THE CANOPY WILL BE SEEN IN THE WEST/SOUTHWEST SKY SOONER. BREEZY
SOUTHWEST WINDS THIS MORNING WILL TURN MORE WEST/SOUTHWEST BY LATE
MORNING/EARLY AFTERNOON. SPEEDS MAY GUST A BIT HIGHER DURING THE
AFTERNOON...THOUGH ARE EXPECTED TO REMAIN BELOW YESTERDAYS VALUES.
COOLER TEMPERATURES HAVE FILTERED IN BEHIND YESTERDAYS DRY PACIFIC
FRONTAL PASSAGE...SO EXPECT HIGH TEMPS TO RUN 3 TO 6 DEGREES COOLER
TODAY. THIS WILL OF COURSE RESULT IN SLIGHTLY HIGHER MINIMUM
RELATIVE HUMIDITIES WHICH ARE ANTICIPATED TO DROP INTO THE 20S BY
AFTERNOON. WARMER TEMPERATURES ARE ON THEIR WAY FOR MONDAY...WITH
THE NEXT CHANCE OF RAIN/SNOW RETURNING BY LATE MONDAY NIGHT.

.TODAY...

SKY/WEATHER.........CLEARING SKIES THROUGH 0800...THEN MOSTLY SUNNY
                    (15-25 PERCENT) UNTIL 1600...THEN PARTLY CLOUDY
                    (50-60 PERCENT).
MAX TEMPERATURE.....56-60.
MIN HUMIDITY........20-25 PERCENT.
WIND (20 FT)........WEST/SOUTHWEST 10 TO 15 MPH WITH GUSTS OF 20 TO
                    25 MPH...BECOMING SOUTHWEST AFTER 1600.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......300 FT AGL INCREASING TO 6700 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....WEST/SOUTHWEST AROUND 15 MPH.
SMOKE DISPERSAL.....POOR BECOMING EXCELLENT IN THE AFTERNOON
                    (4100-78100 KNOT-FT).

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT) UNTIL 2200...THEN
                    MOSTLY CLOUDY (70-80 PERCENT).
MIN TEMPERATURE.....30 TO 35.
MAX HUMIDITY........65 TO 70 PERCENT.
WIND (20 FT)........SOUTHWEST AT 10 TO 15 MPH WITH GUSTS OF 20 TO 25
                    MPH UNTIL 2100...THEN SOUTH AT 5 TO 10 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......9000 FT AGL DECREASING TO 200 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH.
SMOKE DISPERSAL.....EXCELLENT BECOMING POOR (1900-88100 KNOT-FT).

.MONDAY...

SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT).
MAX TEMPERATURE.....62 TO 65.
MIN HUMIDITY........23-28 PERCENT.
WIND (20 FT)........SOUTH AT 8 TO 13 MPH UNTIL 1400...THEN SOUTHWEST
                    10 TO 15 MPH WITH GUSTS TO 25 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......200 FT AGL INCREASING TO 9000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTH/SOUTHWEST AROUND 14 MPH.
SMOKE DISPERSAL.....POOR BECOMING EXCELLENT (1600-123600 KNOT-FT).

$$

FORECASTER...HAHN
REQUESTED BY...CLAYTON WESTBROOK
TYPE OF REQUEST...PRESCRIBED
.TAG 20110320.ROTHL.01/CYS