Suppression Forecast
Issued by NWS St. Louis, MO

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FNUS73 KLSX 221232
FWSLSX

SPOT FORECAST FOR MARK TWAIN LAKE...U.S. ARMY CORPS OF ENGINEERS
NATIONAL WEATHER SERVICE ST LOUIS MO
732 AM CDT WED APR 22 2015

FORECAST IS BASED ON IGNITION TIME OF 0930 CDT ON APRIL 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE
NATIONAL WEATHER SERVICE.

.DISCUSSION...
TODAY WILL BE ANOTHER DAY WITH FIRE WEATHER CONCERNS. MINIMUM RELATIVE
HUMIDITY VALUES WILL DROP BELOW 30 PERCENT ONCE AGAIN THIS AFTERNOON.
NORTHWEST WINDS WILL PICK UP AND BECOME GUSTY BY LATE MORNING BUT SHOULD
NOT BE QUITE AS STRONG AS THE PAST TWO DAYS. THESE CONDITIONS WILL COMBINE
WITH 10 HOUR FUEL MOISTURE VALUES THAT ARE FORECAST TO DROP BELOW 10
PERCENT THIS AFTERNOON TO PRODUCE AN ELEVATED FIRE DANGER...PARTICULARLY
FOR AREAS NORTH OF INTERSTATE 70. HIGH PRESSURE WILL SETTLE OVERHEAD
TONIGHT PRODUCING LIGHT WINDS. CLEAR TO MOSTLY CLEAR SKIES OVERNIGHT WILL
HELP TEMPS DROP WELL INTO THE 30S AT MOST LOCATIONS SETTING THE STAGE FOR
PATCHY FROST TO DEVELOP. THE NEXT CHANCE FOR RAIN WILL BE FRIDAY AND SATURDAY.

.THURSDAY...

SKY/WEATHER.........MOSTLY SUNNY. PATCHY FROST EARLY IN THE
                    MORNING.
CWR.................0 PERCENT.
LAL.................NO TSTMS.
TEMPERATURE.........48 AT IGNITION...MAX 62.
RH..................55 PERCENT AT IGNITION...MIN 31 PERCENT.
WIND...EYE LEVEL....WINDS NORTH AT 1 MPH AT IGNITION...OTHERWISE
                    LIGHT WIND IN THE MORNING BECOMING NORTHWEST
                    AROUND 2 MPH EARLY IN THE AFTERNOON...THEN
                    BECOMING LIGHT LATE IN THE AFTERNOON USING
                    THE WIND FACTOR ADJUSTMENT OF 0.4.
WIND...20 FT........WINDS NORTH AT 2 MPH AT IGNITION...OTHERWISE
                    LIGHT WIND IN THE MORNING BECOMING NORTHWEST
                    AROUND 5 MPH EARLY IN THE AFTERNOON...THEN
                    BECOMING LIGHT LATE IN THE AFTERNOON.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1800 FT AT IGNITION...6600 FT AGL AT
                    MAX HEATING.
TRANSPORT WIND......WEST AROUND 6 MPH.
VENTILATION RATE....POOR (5216 M^2/S) AT MAX HEATING.

$$

FORECASTER...GKS
REQUESTED BY...ALLEN MEHRER
TYPE OF REQUEST...PRESCRIBED
.TAG 20150423.MARKT.01/LSX






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