FNUS72 KJAX 091309
FWSJAX

SPOT FORECAST FOR HARPER CROSSING...FL DOF
NATIONAL WEATHER SERVICE JACKSONVILLE FL
809 AM EST SAT JAN 9 2010

FORECAST IS BASED ON IGNITION TIME OF 0930 EST ON JANUARY 09.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT UNTIL 6 PM EST THIS EVENING DUE TO
VERY LOW RELATIVE HUMIDITY...
...FIRE WEATHER WATCH IN EFFECT SUNDAY AFTERNOON DUE TO VERY LOW
RELATIVE HUMIDITY...

.DISCUSSION...ARCTIC AIR MASS WILL CONTINUE TO FILTER INTO THE AREA
TODAY UNDER BRISK NORTHWEST WINDS. RH VALUES WILL GENERALLY BOTTOM
OUT AROUND 25 TO 30 PERCENT THIS AFTERNOON. SUSTAINED NORTHWEST
WINDS WILL BE 10 TO 15 MPH TODAY WITH OCCASIONAL HIGHER GUSTS POSSIBLE.
THESE CONDITIONS HAVE PROMPTED ISSUANCE OF RED FLAG WARNING FOR
MOST OF NORTHEAST FLORIDA.

SUNDAY...VERY COLD AND DRY CONDITIONS WILL REMAIN IN PLACE WITH
RH VALUES FORECAST TO GENERALLY DROP TO BETWEEN 20 AND 30 PERCENT.
LONG DURATIONS OF CRITICALLY LOW RH VALUES ARE FORECAST...
PROMPTING ISSUANCE OF FIRE WEATHER WATCH. NORTHWEST WINDS WILL
AGAIN BE BETWEEN 10 AND 15 MPH.

VERY COLD AND DRY CONDITIONS WILL LINGER THROUGH EARLY NEXT WEEK
WITH RED FLAG EVENTS ANTICIPATED ON MONDAY AND POSSIBLY TUESDAY.

.TODAY...

SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT).
MAX TEMPERATURE.....AROUND 43.
MIN HUMIDITY........26 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 8 TO 10 MPH.
MIXING HEIGHT.......1400-3000 FT AGL.
MIXING WINDS........NORTHWEST 14 TO 16 MPH.
DISPERSION INDEX....48.

TIME (EST)      9 AM   11 AM  1 PM   3 PM   5 PM
SKY (%).........80     58     35     35     26
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE
TEMP............34     40     42     42     39
RH..............44     33     28     31     40
20 FT WIND......NW 10  NW 10  NW 10  NW 10  NW 9
20 FT WIND GUST.15     15     15     15     15
MIX HGT (FT)....2300   2300   3000   3000   1800
TRANSPORT WIND..NW 16  NW 16  NW 15  NW 15  NW 14

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....AROUND 22.
MAX HUMIDITY........70 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 7 TO 8 MPH.
MIXING HEIGHT.......500-1800 FT AGL.
MIXING WINDS........NORTHWEST 9 TO 14 MPH.
DISPERSION INDEX....5.

TIME (EST)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........26     17     17     17     17     19
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TEMP............35     31     28     27     26     25
RH..............40     51     62     63     64     66
20 FT WIND......NW 8   NW 7   NW 7   NW 7   NW 7   NW 8
20 FT WIND GUST.15     10     10     10     10     15
MIX HGT (FT)....1800   700    600    600    500    800
TRANSPORT WIND..NW 14  NW 13  NW 10  NW 10  NW 9   NW 13

$$
FORECASTER...TRABERT
REQUESTED BY...PAT DEREN
TYPE OF REQUEST...PRESCRIBED
.TAG 20100109.HARPE.01/JAX