Suppression Forecast
Issued by NWS St. Louis, MO

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FNUS73 KLSX 291141
FWSLSX

SPOT FORECAST FOR MARK TWAIN LAKE...U.S. ARMY CORPS OF ENGINEERS
NATIONAL WEATHER SERVICE ST LOUIS MO
641 AM CDT WED APR 29 2015

FORECAST IS BASED ON IGNITION TIME OF 0930 CDT ON APRIL 29.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE
NATIONAL WEATHER SERVICE.

.DISCUSSION...
NORTHERLY WINDS WILL CONTINUE THROUGH THURSDAY ACROSS THE REGION
WITH WINDS INCREASING TO AROUND 15 MPH AND GUSTS TO AROUND 20 MPH
ON THURSDAY. AFTERNOON RELATIVE HUMIDITY VALUES ARE EXPECTED TO
DROP INTO THE 25 TO 30 PERCENT RANGE BOTH TODAY AND THURSDAY. THIS
MAY LEAD TO A HEIGHTENED FIRE DANGER THURSDAY AFTERNOON. A FEW
SHOWERS ARE POSSIBLE THIS AFTERNOON AND EVENING ACROSS PORTIONS
OF ILLINOIS.

.TODAY...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................10 PERCENT.
LAL.................NO TSTMS.
TEMPERATURE.........59 AT IGNITION...MAX 72.
RH..................61 PERCENT AT IGNITION...MIN 33 PERCENT.
WIND...EYE LEVEL....NORTH AROUND 2 MPH AT IGNITION...OTHERWISE
                    2 TO 4 MPH OUT OF THE NORTH USING ADJUSTMENT
                    FACTOR OF 0.4.
WIND...20 FT........WINDS NORTH AT 5 MPH AT IGNITION...OTHERWISE
                    LIGHT WIND EARLY IN THE MORNING BECOMING
                    NORTHWEST 5 TO 9 MPH IN THE LATE MORNING AND
                    AFTERNOON.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......AROUND 3000 FT AGL AT
                    IGNITION...8900 FT AGL AT MAX HEATING.
TRANSPORT WIND......NORTH AROUND 10 MPH.
VENTILATION RATE....GOOD (12616 M^2/S) AT MAX HEATING.

$$

FORECASTER...GOSSELIN
REQUESTED BY...ALLEN MEHRER
TYPE OF REQUEST...PRESCRIBED
.TAG 20150429.MARKT.01/LSX





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