FNUS73 KLSX 181439
FWSLSX

SPOT FORECAST FOR PRAIRIE BURN...MISSOURI DEPARTMENT OF CONSERVATION
NATIONAL WEATHER SERVICE ST LOUIS MO
939 AM CDT THU MAR 18 2010

FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON MARCH 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE
NATIONAL WEATHER SERVICE.

.DISCUSSION...
HIGH RELATIVE HUMIDITIES WILL DROP QUICKLY AFTER 1100 AM ONCE THE
FOG HAS BURNED OFF SETTING UP BETTER BURNING CONDITIONS THIS
AFTERNOON.  HUMIDITIES CLOSE TO 70 PERCENT AT IGNITION WILL DROP TO
AROUND 40 PERCENT THIS AFTERNOON.  MIXING HEIGHTS ONLY AROUND 1000FT
LATE THIS MORNING WILL CLIMB ABOVE 3000FT.  FRIDAY WILL PROVIDE BETTER
BURNING CONDITIONS WITH HIGH TEMPERATURES IN THE UPPER 60S...MINIMUM
RELATIVE HUMIDITIES IN THE MID 30S AND MAXIMUM MIXING HEIGHTS AROUND
4000FT.

.REST OF TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
                    TEMPERATURE.........49 AT IGNITION...MAX 63.
                    MIN HUMIDITY........66 PERCENT AT IGNITION...MIN 37 PERCENT.
WIND...EYE LEVEL....WEST WIND AROUND 5 MPH.
WIND...20 FT........WINDS WEST AT 5 MPH AT IGNITION...OTHERWISE
                    WEST WIND AROUND 5 MPH.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1000FT AT IGNITION...
                    3300 FT AGL AT MAX HEATING.
TRANSPORT WINDS.....WEST AROUND 10 MPH.
VENTILATION RATE....POOR (4729 M 2/S) AT MAX HEATING.

$$

FORECASTER...BRITT
REQUESTED BY...ANDY TAPPMEYER
TYPE OF REQUEST...PRESCRIBED
.TAG 20100318.PRAIR.01/LSX