FNUS75 KCYS 200101
FWSCYS

SPOT FORECAST FOR N CARANGIE BLACKLINE...NPS AFB
NATIONAL WEATHER SERVICE CHEYENNE WY
701 PM MDT MON APR 19 2010

FORECAST IS BASED ON IGNITION TIME OF 0900 MDT ON APRIL 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A WEAK COLD FRONT ASSOCIATED WITH A SLOW MOVING UPPER LEVEL
DISTURBANCE WILL MOVE THROUGH THE BURN SITE EARLY
TUESDAY...TURNING WINDS NORTHEASTERLY AND MAINTAINING THE
UNSETTLED WEATHER CONDITIONS THROUGH THE DAY. IN FACT...SCATTERED
RAIN SHOWERS WILL BE POSSIBLE AT THE BURN SITE...JUST BEHIND THIS
WEAK FRONTAL PASSAGE TUESDAY MORNING. ISOLATED THUNDERSTORMS WILL
BE POSSIBLE DURING THE AFTERNOON HOURS. MORE CLOUDS WILL RESULT IN
COOLER AFTERNOON HIGH TEMPERATURES TUESDAY...AND HIGHER MINIMUM
RELATIVE HUMIDITIES. HUMIDITY RECOVERIES WILL ONCE AGAIN BE
EXCELLENT ON TUESDAY NIGHT...WITH AREAS OF FOG A POSSIBILITY.

.TUESDAY...

SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SCATTERED RAIN
                    SHOWERS IN THE MORNING. ISOLATED THUNDERSTORMS
                    IN THE AFTERNOON.
MAX TEMPERATURE.....60-62.
MIN HUMIDITY........42 TO 46 PERCENT.
WIND (20 FT)........NORTHEAST AT 5 TO 10 MPH...INCREASING TO 15
                    MPH AFTER 1200.
CWR.................20 PERCENT.
LAL.................2.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4600 FT AGL INCREASING TO 9000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHEAST AROUND 15 MPH.
SMOKE DISPERSAL.....GOOD BECOMING EXCELLENT (50600-135500 KNOT-FT).

.TUESDAY NIGHT...

SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT) UNTIL 2400...THEN
                    MOSTLY CLOUDY (70-80 PERCENT). AREAS OF FOG AFTER
                    0300.
MIN TEMPERATURE.....AROUND 40.
MAX HUMIDITY........95-100 PERCENT.
WIND (20 FT)........EAST WINDS 8 TO 12 MPH UNTIL 0300...THEN SOUTHEAST
                    AT 5 TO 8 MPH.
CWR.................5 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5300 FT AGL DECREASING TO 800 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....EAST AROUND 12 MPH.
SMOKE DISPERSAL.....EXCELLENT BECOMING POOR (8000-85100 KNOT-FT).

.WEDNESDAY...

SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (55-65 PERCENT). AREAS OF FOG UNTIL
                    0900.
MAX TEMPERATURE.....62-64.
MIN HUMIDITY........35 TO 40 PERCENT.
WIND (20 FT)........SOUTHEAST 5-9 MPH UNTIL 1100...THEN INCREASING TO 10
                    TO 16 MPH WITH HIGHER GUSTS AFTER NOON.
CWR.................ZERO PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1400 FT AGL INCREASING TO 4200 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 15 MPH.
SMOKE DISPERSAL.....POOR BECOMING EXCELLENT (7000-83400 KNOT-FT).

$$
FORECASTER...HAHN
REQUESTED BY...SONYA FEASTER
TYPE OF REQUEST...PRESCRIBED
.TAG 20100420.NCARA.01/CYS