FNUS73 KLSX 201336
FWSLSX

SPOT FORECAST FOR BRM...ST. CHARLES COUNTY PARKS AND RECREATION
NATIONAL WEATHER SERVICE ST LOUIS MO
736 AM CST FRI FEB 20 2009

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

.DISCUSSION...
A FAST MOVING LOW PRESSURE SYSTEM IS PROGGED TO DIVE SOUTHEAST TOWARD
THE FORECAST AREA THIS AFTERNOON. THIS WILL RESULT IN AN INCREASING SOUTH
TO SOUTHEAST WIND. TEMPERATURES SHOULD WARM INTO THE MID 40S IN THE AFTERNOON.
AFTERNOON RELATIVE HUMIDITY VALUES WILL FALL TO 30 TO 35 PERCENT.

MORNING INVERSION WILL KEEP MIXING HEIGHTS BELOW 1500 FEET AT 9 AM. TRANSPORT
WINDS WILL ALSO BE LIGHT AS HIGH PRESSURE SLOWLY DRIFTS EAST.

MIXING HEIGHTS SHOULD LIFT TO AROUND 2000 FEET AROUND NOON. HEIGHTS WILL MAX
OUT JUST UNDER 3000 FEET DURING THE AFTERNOON. TRANSPORT WINDS SHOULD ALSO
INCREASE IN THE AFTERNOON AS THE PRESSURE GRADIENT INCREASES.


.REST OF TODAY...

SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CWR.................10 PERCENT.
TEMPERATURE.........22 AT IGNITION...MAX 46.
RH..................68 PERCENT AT IGNITION...MIN 31 PERCENT.
WIND...EYE LEVEL....SOUTHWEST WIND AROUND 5 MPH SHIFTING TO THE
                    SOUTHEAST IN THE LATE MORNING AND AFTERNOON.
WIND...20 FT........WINDS SOUTH AT 5 MPH AT IGNITION...OTHERWISE
                    SOUTHWEST WIND AROUND 5 MPH SHIFTING TO THE
                    SOUTHEAST IN THE LATE MORNING AND AFTERNOON.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2800 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 10 MPH.
VENTILATION RATE....POOR (4477 M 2/S).

.TONIGHT...

SKY/WEATHER.........CLOUDY. CHANCE OF RAIN UNTIL EARLY
                    MORNING...THEN CHANCE OF SNOW LATE.
CWR.................50 PERCENT.
TEMPERATURE.........MIN 27.
RH..................MAX 76 PERCENT.
WIND...EYE LEVEL....BLUSTERY. SOUTH WIND AROUND 10 MPH SHIFTING TO
                    THE WEST LATE.
WIND...20 FT........BLUSTERY. SOUTH WIND AROUND 10 MPH WITH GUSTS
                    TO AROUND 25 MPH SHIFTING TO THE WEST WITH
                    GUSTS TO AROUND 30 MPH LATE.
HAINES INDEX........N/A.
MIXING HEIGHT.......N/A.
TRANSPORT WIND......N/A.
VENTILATION RATE....N/A.


$$

FORECASTER...TILLY
REQUESTED BY...FORESTRY SUPERVISOR
TYPE OF REQUEST...PRESCRIBED
.TAG 20090220.BRM__.01/LSX