FNUS73 KDTX 121452 CCA
FWSDTX

SPOT FORECAST FOR TOBICO EDGE...CORRECTED
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1012 AM EDT TUE MAY 12 2009

IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

DISCUSSION...HIGH PRESSURE OVERHEAD THIS MORNING WILL GRADUALLY
BUILD TO THE EAST TODAY. SOUTHWESTERLY WINDS WILL INCREASE THIS
AFTERNOON AND SHOULD PREVENT A LAKE BREEEZE FROM MOVING IN OFF THE
SAGINAW BAY. THE DRY AIRMASS WILL REMAIN OVERHEAD TODAY WITH
DEWPOINTS STARTING TO INCREASE LATE THIS AFTERNOON AHEAD OF THE NEXT
SYSTEM.

OTHERWISE MOISTURE WILL SURGE NORTH INTO THE REGION OVERNIGHT AND
THROUGH THE DAY ON WEDNESDAY. THIS WILL LEAD TO HIGHER RELATIVE
HUMIIDITIES AND A CHANCE OF THUNDERSTORMS ON WEDNESDAY. WIDESPREAD
RAINFALL IS THEN EXPECTED WEDNESDAY NIGHT AS A COLD FRONT MOVES
THROUGH.

IF A LAKE BREEZE IS ABLE TO DEVELOP THIS AFTERNOON...WINDS WILL
SHIFT TO THE SOUTHEAST OR EAST AROUND 2-3 PM WITH AN INCREASE IN
RELATIVE HUMIDITY.

PLEASE CALL WITH ANY QUESTIONS YOU HAVE ABOUT TODAYS FORECAST.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT).
MAX TEMPERATURE.....59-63.
MIN HUMIDITY........AROUND 28 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 9 MPH.
TRANSPORT WINDS.....WEST AROUND 3 MPH.
MIXING HEIGHT.......INCREASING TO 8500 FT AGL.
VENTILATION RATE....EXCELLENT (MAX...700).

.TONIGHT...

MIN TEMPERATURE.....39-44.
MAX HUMIDITY........78 PERCENT.
VENTILATION RATE....POOR (MIN...130).

$$
FORECASTER...CLARK
REQUESTED BY...RNADY MCKENZIE
TYPE OF REQUEST...PRESCRIBED
.TAG 20090512.TOBIC.01/DTX