FNUS72 KJAX 200921
FWSJAX

SPOT FORECAST FOR IMPASSABLE BAY...USDA-FOREST SERVICE
NATIONAL WEATHER SERVICE JACKSONVILLE FL
521 AM EDT MON JUN 20 2011

FORECAST IS BASED ON REQUEST TIME OF 0503 EDT ON JUNE 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...FIRE WEATHER WATCH IN EFFECT TUESDAY AFTERNOON...

.DISCUSSION...HIGH PRESSURE WILL PERSIST ACROSS SOUTH FLORIDA WHILE
WEAK TROUGHING LINGERS ACROSS THE SOUTHEAST REGIONS. THIS REGIME WILL
MAINTAIN A PREVAILING WEST TO SOUTHWEST FLOW ACROSS THE LOCAL AREA...
AND THE ATLANTIC SEA BREEZE WILL STALL EAST OF THE FIRE EACH AFTERNOON.
TEMPERATURES WILL LIKELY REACH THE CENTURY MARK THE NEXT SEVERAL DAYS
WITH NO RAIN EXPECTED. WINDS WILL REMAIN BELOW 10 MPH.

A DRIER AIRMASS WILL FILTER OVER THE AREA FROM THE NORTHWEST. AFTERNOON
RELATIVE HUMIDITIES WILL BOTTOM OUT AROUND 40 PERCENT THIS AFTERNOON. ON
TUESDAY...EXTENDED DURATIONS OF LOW RHS ARE EXPECTED IN COMBINATION WITH
ELEVATED ERC VALUES. THUS A FIRE WEATHER WATCH REMAINS IN EFFECT FOR THIS
AREA.

RAIN CHANCES INCREASE LATE IN THE WEEK AS A STRONGER UPPER LEVEL
DISTURBANCE APPROACHES THE AREA.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT). PATCHY FOG EARLY
                    IN THE MORNING.
MAX TEMPERATURE.....AROUND 99.
MIN HUMIDITY........43 PERCENT.
WIND (20 FT)........WEST WINDS 6 TO 8 MPH.
LAL.................1.
MIXING HEIGHT.......1100-1900 FT AGL INCREASING TO 6600-7100 FT
                    AGL.
MIXING WINDS........WEST 8 TO 12 MPH.
DISPERSION INDEX....60.
CHANCE OF PCPN......10 PERCENT.

TIME (EDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
SKY (%).........41     39     39     40     40     40
WEATHER COV.....PATCHY
WEATHER TYPE....FOG    NONE   NONE   NONE   NONE   NONE
TEMP............70     74     87     95     99     98
RH..............100    99     67     51     43     43
20 FT WIND......W 6    W 6    W 6    W 6    W 7    W 7
20 FT WIND GUST.10     10     10     10     15     15
MIX HGT (FT)....1100   1900   1900   4400   7100   7100
TRANSPORT WIND..W 10   W 12   W 12   W 10   W 8    W 8
CHC OF PCPN (%).10     0      0      0      10     10
LAL.............1      1      1      1      1      1

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
MIN TEMPERATURE.....AROUND 73.
MAX HUMIDITY........96 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 9 MPH.
LAL.................1.
MIXING HEIGHT.......6600 FT AGL DECREASING TO 300-2200 FT AGL EARLY
                    IN THE EVENING.
MIXING WINDS........WEST 8 TO 13 MPH.
DISPERSION INDEX....5.
CHANCE OF PCPN......10 PERCENT.
LVORI...............5.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........42     44     44     45     46     46
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TEMP............93     87     82     79     77     75
RH..............49     62     78     85     87     90
20 FT WIND......W 8    SW 9   W 8    W 7    W 7    W 6
20 FT WIND GUST.15     15     10     10     10     10
MIX HGT (FT)....6600   2200   2200   1000   300    300
TRANSPORT WIND..W 10   SW 13  SW 13  W 10   W 8    W 8
LVORI...........5      5      5      5      5      5
DISPERSION INDX.83     36     36     7      5      5
CHC OF PCPN (%).10     0      0      0      10     10
LAL.............1      1      1      1      1      1

.TUESDAY...

SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT).
MAX TEMPERATURE.....AROUND 101.
MIN HUMIDITY........35 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 5 MPH BECOMING SOUTHWEST IN
                    THE AFTERNOON.
LAL.................1.
MIXING HEIGHT.......1300-2200 FT AGL INCREASING TO 7500-7800 FT
                    AGL.
MIXING WINDS........NORTHWEST 6 TO 10 MPH SHIFTING TO THE SOUTHWEST
                    AROUND 8 MPH LATE IN THE AFTERNOON.
DISPERSION INDEX....47.
CHANCE OF PCPN......10 PERCENT.

$$
FORECASTER...ZAPPE
REQUESTED BY...PETER MYERS
TYPE OF REQUEST...WILDFIRE
.TAG 20110620.IMPAS.02/JAX