FNUS73 KAPX 211413
FWSAPX

SPOT FORECAST FOR MACK LAKE FUELBREAKS...USFS
NATIONAL WEATHER SERVICE GAYLORD MI
1013 AM EDT SUN MAR 21 2010

FORECAST IS BASED ON IGNITION TIME OF 1020 EDT ON MARCH 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...GREAT DAY TO BURN WITH HIGH PRESSURE IN CONTROL
SUPPLYING OVERALL LIGHT AND VARIABLE WINDS. DOMINANT DIRECTION
WILL BE FROM THE SOUTH/SOUTHWEST...WITH SPEEDS GENERALLY 5 MPH
OR LESS. WITH A VERY DRY AIRMASS IN PLACE...LATE MORNING AND
EARLY AFTERNOON MIXING WILL RESULT IN RELATIVE HUMIDITY VALUES
FALLING QUICKLY BELOW 30 PERCENT...WITH A MINIMUM SOMEWHERE
NEARING 15 PERCENT.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT) WITH JUST A FEW
                    HIGH CLOUDS THROUGH EARLY AFTERNOON.
                    TEMPERATURE.........34 AT IGNITION...MAX 48.
                    MIN HUMIDITY........60 PERCENT AT IGNITION...MIN 14 PERCENT.
WIND (20 FT)........SOUTH/SOUTHWEST 3 TO 5 MPH.
TRANSPORT WINDS.....WEST/SOUTHWEST 5 TO 8 MPH.
MIXING HEIGHT.......600 FT AGL AT IGNITION INCREASING TO 4200
                    FT AGL.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH AT IGNITION...MAX 5.
SMOKE DISPERSAL.....POOR (100) AT IGNITION. MAX...GOOD (400).

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
MIN TEMPERATURE.....24.
MAX HUMIDITY........62 PERCENT.
WIND (20 FT)........LIGHT WINDS.
TRANSPORT WINDS.....NORTHEAST 5 TO 8 MPH.
MIXING HEIGHT.......3300 FT AGL DECREASING TO 400-600 FT AGL IN THE
                    LATE EVENING AND OVERNIGHT.
HAINES INDEX........MIN 4.
SMOKE DISPERSAL.....MIN POOR(0).

.MONDAY...

SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....51.
MIN HUMIDITY........22 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTHEAST 6 TO 11 MPH IN
                    THE LATE MORNING AND AFTERNOON.
TRANSPORT WINDS.....NORTHEAST 5 TO 14 MPH INCREASING TO 16 TO 18
                    MPH LATE IN THE MORNING.
MIXING HEIGHT.......200-1000 FT AGL INCREASING TO 2800-3000 FT AGL
                    IN THE AFTERNOON.
HAINES INDEX........MAX 5.
SMOKE DISPERSAL.....MAX EXCELLENT(600).

$$
FORECASTER...DAVID LAWRENCE
REQUESTED BY...TOM VIERS
TYPE OF REQUEST...PRESCRIBED
.TAG 20100321.MACKL.01/APX