FNUS73 KLSX 171420
FWSLSX

SPOT FORECAST FOR MIDDLE RIVER...MARK TWAIN NATIONAL FOREST
NATIONAL WEATHER SERVICE ST LOUIS MO
919 AM CDT TUE MAR 17 2009

FORECAST IS BASED ON IGNITION TIME OF 0910 CDT ON MARCH 17.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE
NATIONAL WEATHER SERVICE.

.DISCUSSION...
AN INCREASED FIRE DANGER IS EXPECTED ACROSS THE AREA ON TODAY AS CLEAR
SKIES AND GUSTY SOUTHWEST WINDS MAKE FOR AN UNSEASONABLY WARM DAY...
WITH LOW AFTERNOON HUMIDITIES. IN ADDITION...FAIRLY DEEP MIXING
WILL CREATE GUSTY CONDITIONS BY LATE THIS MORNING INTO THIS
AFTERNOON. A COLD FRONT WILL BRING COOLER TEMPERATURES TO
NORTHERN SECTIONS OF THE REGION ON WEDNESDAY...AND TO THE ENTIRE
AREA ON WEDNESDAY NIGHT...ALONG WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS.

.REST OF TODAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................NO TSTMS.
TEMPERATURE.........58 AT IGNITION...MAX 80.
RH..................53 PERCENT AT IGNITION...MIN 31 PERCENT.
WIND...EYE LEVEL....SOUTH WIND 10 TO 15 MPH.
WIND...20 FT........WINDS SOUTHWEST AT 10 MPH AT
                    IGNITION...OTHERWISE SOUTH WIND 10 TO 15 MPH.
                    GUSTS UP TO 25 MPH IN THE LATE MORNING AND
                    EARLY AFTERNOON.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 20 MPH.
VENTILATION RATE....GOOD (10463 M 2/S).

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
LAL.................NO TSTMS.
TEMPERATURE.........MIN 52.
RH..................MAX 80 PERCENT.
WIND...EYE LEVEL....SOUTHWEST WIND AROUND 10 MPH.
WIND...20 FT........SOUTHWEST WIND AROUND 10 MPH.
HAINES INDEX........N/A.
MIXING HEIGHT.......N/A.
TRANSPORT WIND......N/A.
VENTILATION RATE....N/A.

.WEDNESDAY...

SKY/WEATHER.........PARTLY SUNNY THEN BECOMING MOSTLY CLOUDY.
                    CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
                    AFTERNOON.
CWR.................30 PERCENT.
LAL.................NO TSTMS UNTIL 1300...THEN 9-15 STRIKES.
TEMPERATURE.........MAX 70.
RH..................MIN 43 PERCENT.
WIND...EYE LEVEL....SOUTHWEST WIND 10 TO 15 MPH UNTIL LATE MORNING
                    SHIFTING TO THE NORTH LATE IN THE AFTERNOON.
WIND...20 FT........SOUTHWEST WIND 10 TO 15 MPH UNTIL LATE MORNING
                    SHIFTING TO THE NORTH LATE IN THE AFTERNOON.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS IN THE AFTERNOON.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5200 FT AGL.
TRANSPORT WIND......WEST AROUND 15 MPH.
VENTILATION RATE....GOOD (10872 M 2/S).

$$

FORECASTER...WFO LSX
REQUESTED BY...GREGG PAINTER
TYPE OF REQUEST...PRESCRIBED
.TAG 20090317.MIDDL.01/LSX