FNUS75 KCYS 150438
FWSCYS

SPOT FORECAST FOR N CARANGIE BLACKLINE...NPS AFB
NATIONAL WEATHER SERVICE CHEYENNE WY
1038 PM MDT WED APR 14 2010

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON APRIL 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
DRY CONDITIONS CAN BE EXPECTED AT THE BURN SITE THROUGH FRIDAY.
WINDS WILL REMAIN NORTHERLY ON THURSDAY AS AN AREA OF HIGH
PRESSURE SETTLES INTO THE NORTHERN PLAINS. MINIMUM RELATIVE
HUMIDITIES WILL DROP INTO THE 18 TO 22 PERCENT RANGE THURSDAY
AFTERNOON...BUT SHOULD STAY A TAD HIGHER THAN THOSE ON WEDNESDAY
WITH A BIT BETTER MOISTURE EXPECTED. ANOTHER DRY FRONTAL SURGE
WILL MOVE THROUGH THE BURN SITE THURSDAY NIGHT...TURNING WINDS
NORTHEASTERLY...COOLING TEMPERATURES AND INCREASING MOISTURE
FURTHER. IN FACT...HUMIDITY RECOVERIES WILL BE EXCELLENT THURSDAY
NIGHT WITH MAXIMUM VALUES OF 85 TO 90 PERCENT. WINDS WILL
GRADUALLY TURN SOUTHEASTERLY DURING THE DAY ON FRIDAY...WITH
COOLER HIGH TEMPERATURES EXPECTED.

.THURSDAY...

SKY/WEATHER.........MOSTLY SUNNY (10-15 PERCENT).
MAX TEMPERATURE.....67-70.
MIN HUMIDITY........18-22 PERCENT.
WIND (20 FT)........NORTH/NORTHWEST 8-12 MPH UNTIL 0900...THEN INCREASING
                    TO 12 TO 16 WITH GUSTS TO 20 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3900 FT AGL INCREASING TO 7800 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTH/NORTHWEST 10-15 MPH.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT (34700-70200
                    KNOT-FT).

.THURSDAY NIGHT...

SKY/WEATHER.........MOSTLY CLEAR (25-35 PERCENT) UNTIL 0300...THEN PARTLY
                    CLOUDY (50-60 PERCENT.
MIN TEMPERATURE.....35-38.
MAX HUMIDITY........85-90 PERCENT.
WIND (20 FT)........NORTH AT 10 TO 15 MPH UNTIL 2200...THEN NORTHEAST AT 10
                    TO 15 MPH WITH GUSTS TO 20 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4200 FT AGL DECREASING TO 400 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTHEAST AROUND 15 MPH.
SMOKE DISPERSAL.....GOOD BECOMING POOR (3000-46600 KNOT-FT).

.FRIDAY...

SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT).
MAX TEMPERATURE.....AROUND 61.
MIN HUMIDITY........40 PERCENT.
WIND (20 FT)........NORTHEAST AT 5 TO 15 MPH UNTIL 1200...THEN BECOMING
                    SOUTHEAST AT 10 TO 15 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3000 FT AGL INCREASING TO 6000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....EAST AROUND 15 MPH.
SMOKE DISPERSAL.....FAIR BECOMING EXCELLENT (24200-90000 KNOT-FT).

$$

FORECASTER...HAHN
REQUESTED BY...ERIC ALLEN
TYPE OF REQUEST...PRESCRIBED
.TAG 20100415.NCARA.01/CYS