FNUS71 KAKQ 221134
FWSAKQ

SPOT FORECAST FOR PURGASON...VIRGINIA DEPARTMENT OF FORESTRY (VADOF)
NATIONAL WEATHER SERVICE WAKEFIELD VA
734 AM EDT THU OCT 22 2009

FORECAST IS BASED ON IGNITION TIME OF 1000 EDT ON OCTOBER 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

HIGH PRESSURE REMAINS CENTERED OFF THE MID ATLANTIC COAST THROUGH
TONIGHT. LOW PRESSURE DEEPENS ACROSS THE UPPER MIDWEST REGION
TONIGHT THROUGH FRIDAY...THEN PASSES NORTH OF THE AREA OVER
THE WEEKEND. THE LOW WILL PUSH A COLD FRONT THROUGH THE MID
ATLANTIC STATES SATURDAY AND SATURDAY NIGHT. HIGH PRESSURE RETURNS
LATE SUNDAY THROUGH MONDAY.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........28 PERCENT.
WIND (20FT/2MIN)....LIGHT WINDS...BECOMING SOUTHWEST 5 TO 10 MPH IN
                    THE LATE MORNING AND AFTERNOON.
MIXING HEIGHT.......300-1500 FT AGL...INCREASING TO 2300-3900 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 5 TO 13 MPH...INCREASING TO 16 TO 17
                    MPH LATE IN THE MORNING.
VENTILATION RATE....VERY POOR TO FAIR (1000-47400
                    FT-MPH)...INCREASING TO FAIR (51900-58700
                    FT-MPH) EARLY IN THE AFTERNOON.

TIME (EDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM
SKY (%).........27  27  28  29  29  33  37  41  45  49  53  56
WEATHER COV.....
WEATHER TYPE....
TEMP............64  71  76  78  79  80  80  79  75  68  63  60
RH..............52  42  34  32  30  29  29  30  34  45  56  60
20 FT WIND DIR..SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
20 FT WIND SPD..5   6   7   8   9   8   8   7   6   5   4   3
20 FT WIND GUST.10  10  10  15  15  15  15  10  10  10  10  5
MIX HGT (KFT)...1.1 1.5 2.3 3.1 3.9 3.8 3.8 3.7 2.6 1.4 0.3 0.3
TRANSP WIND DIR.SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
TRANSP WIND SPD.13  16  17  17  17  17  17  16  15  14  13  10

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT)...THEN BECOMING
                    MOSTLY CLOUDY (60-70 PERCENT).
MIN TEMPERATURE.....AROUND 53.
MAX HUMIDITY........80 PERCENT.
WIND (20FT/2MIN)....SOUTHWEST WINDS 5 TO 7 MPH EARLY IN THE
                    EVENING...BECOMING LIGHT.
MIXING HEIGHT.......1400-2600 FT AGL...DECREASING TO 300 FT AGL
                    EARLY IN THE EVENING.
TRANSPORT WINDS.....SOUTHWEST 6 TO 15 MPH...DECREASING TO 1 TO 5
                    MPH AFTER MIDNIGHT.
VENTILATION RATE....VERY POOR TO POOR (400-34000 FT-MPH).

.FRIDAY...

SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). A CHANCE OF
                    SHOWERS EARLY IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 70.
MIN HUMIDITY........58 PERCENT.
WIND (20FT/2MIN)....LIGHT WINDS...BECOMING SOUTHEAST 5 TO 7 MPH IN
                    THE AFTERNOON.
MIXING HEIGHT.......300-2200 FT AGL.
TRANSPORT WINDS.....SOUTH 2 TO 9 MPH...INCREASING TO 12 TO 13 MPH
                    IN THE AFTERNOON.
VENTILATION RATE....VERY POOR (400-23300 FT-MPH).



FORECASTER...LYNCH
REQUESTED BY...CONLEY
TYPE OF REQUEST...PRESCRIBED
.TAG 20091022.PURGA.01/AKQ