FNUS73 KLSX 072211
FWSLSX

SPOT FORECAST FOR LOW GAP...USFS
NATIONAL WEATHER SERVICE ST LOUIS MO
511 PM CDT SAT JUL 7 2012

FORECAST IS BASED ON REQUEST TIME OF 1646 CDT ON JULY 07.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE
NATIONAL WEATHER SERVICE.

...HEAT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING...

.DISCUSSION...
ISOLATED THUNDERSTORMS WILL DIMINISH TONIGHT WITH THE LOSS OF
DAYTIME HEATING.  ADDITIONAL PRECIPITATION MAY DEVELOP OVERNIGHT
AS A COLD FRONT SLOWLY APPROACHES THE AREA.  THE COOLER AIR BEHIND
THE FRONT WILL END THE CURRENT HEAT WAVE WITH HIGHS IN THE 80S
EXPECTED FOR MOST OF NEXT WEEK...ALTHOUGH ONE MORE ABOVE AVERAGE
TEMPERATURE DAY IS EXPECTED ON SUNDAY.  MINIMUM RELATIVE HUMIDITY
VALUES WILL REMAIN ABOVE 35 PERCENT TOMORROW DUE TO THE COOLER AIR
TEMPERATURES AND HIGHER MOISTURE CONTENT TO THE AIR FROM THE FRONT.
INITIALLY LIGHT AND VARIABLE WINDS WILL TURN NORTHEASTERLY BEHIND THE
FRONT...AND THIS SHOULD TAKE PLACE IN YOUR AREA SUNDAY MORNING ALTHOUGH
WIND SPEEDS ARE EXPECTED TO REMAIN LIGHT BEHIND THE FRONT THROUGHOUT
THE DAY SUNDAY AND INTO SUNDAY NIGHT.

.SUNDAY...

SKY/WEATHER.........PARTLY SUNNY THEN BECOMING MOSTLY CLOUDY.
                    CHANCE OF SHOWERS AND THUNDERSTORMS.
CWR.................50 PERCENT.
LAL.................9-15 STRIKES.
TEMPERATURE.........MAX 95.
RH..................MIN 38 PERCENT.
WIND...EYE LEVEL....LIGHT WIND.
WIND...20 FT........NORTHWEST WIND AROUND 5 MPH EARLY IN THE
                    MORNING BECOMING LIGHT. GUSTY AND ERRATIC WINDS
                    EXPECTED NEAR THUNDERSTORMS.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......7400 FT AGL AT MAX HEATING.
TRANSPORT WIND......SOUTHEAST AROUND 3 MPH.
VENTILATION RATE....POOR (3472 M 2/S) AT MAX HEATING.

.SUNDAY NIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS AND THUNDERSTORMS LIKELY.
CWR.................60 PERCENT.
LAL.................15-20 STRIKES.
TEMPERATURE.........MIN 70.
RH..................MAX 89 PERCENT.
WIND...EYE LEVEL....LIGHT WIND.
WIND...20 FT........WIND BECOMING NORTHEAST 5 MPH EARLY IN THE EVENING.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS.
HAINES INDEX........N/A.
MIXING HEIGHT.......N/A.
TRANSPORT WIND......N/A.
VENTILATION RATE....N/A.

$$

FORECASTER...TES
REQUESTED BY...STEWART TURNER
TYPE OF REQUEST...WILDFIRE
.TAG 20120707.LOWGA.01/LSX