352
FNUS72 KTBW 201040
FWSTBW

Spot Forecast for LH_S1...SWFWMD
National Weather Service Tampa Bay Ruskin FL
640 AM EDT Fri Sep 20 2024

Forecast is based on ignition time of 0700 EDT on September 20.
If conditions become unrepresentative, contact the National Weather
Service.

Please contact our office at (813) 645-2323 if you have questions or
concerns with this forecast.

.DISCUSSION...
Drier air is anticipated today as north to northeasterly winds set
up. This should limit shower and storm activity in most locations
with the highest chances over the interior and SW FL. High pressure
builds into the area through the weekend with drier air staying in
place and lower rain chances. Humidity values remain above critical
levels with no fire weather concerns expected. No significant fog is
expected.

.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent). Isolated showers and
                    thunderstorms late in the afternoon. Scattered
                    showers and thunderstorms late in the
                    afternoon.
Chance of pcpn......30 percent.
LAL.................1 until 1500, then 2 until 1700, then 3.
Max temperature.....Around 91.
Min humidity........56 percent.
Wind (20 ft)........Light winds. Gusty and erratic winds expected
                    near thunderstorms late in the afternoon.
Mixing height.......5100 ft AGL.
Transport winds.....Northeast 3 to 8 mph.
Dispersion index....6 increasing to 31.
LVORI...............5.

TIME (EDT)      7 AM   9 AM   11 AM  1 PM   3 PM   5 PM
Sky (%).........13     16     4      12     23     37
Weather cov.....                            ISOLTD SCTTRD
Weather type....NONE   NONE   NONE   NONE   RNSHWR RNSHWR
Tstm cov........                            ISOLTD SCTTRD
Chc of pcpn (%).0      0      0      10     20     30
LAL.............1      1      1      1      2      3
Temp............73     77     84     89     90     88
RH..............94     94     74     61     56     61
20 ft wind......N 1    NE 2   NE 3   NE 3   NE 3   NE 3
20 ft wind gust.3      5      8      9      10     12
Mix hgt (ft)....400    600    3000   5000   4900   2900
Transport wind..NE 3   NE 6   NE 6   N 6    NE 6   N 8
Dispersion idx..2      9      22     31     34     30
LVORI...........8      7      3      2      1      2

.TONIGHT...

Sky/weather.........Mostly clear (15-25 percent). Isolated showers
                    and thunderstorms early in the evening.
Chance of pcpn......20 percent.
LAL.................2 until 2000, then 1.
Min temperature.....Around 72.
Max humidity........96 percent.
Wind (20 ft)........Light winds. Gusty and erratic winds expected
                    near thunderstorms early in the evening.
Mixing height.......400 ft AGL.
Transport winds.....Northeast 6 to 10 mph.
Dispersion index....21 decreasing to 7.
LVORI...............5.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........40     33     24     10     9      3
Weather cov.....ISOLTD
Weather type....RNSHWR NONE   NONE   NONE   NONE   NONE
Tstm cov........ISOLTD
Chc of pcpn (%).20     10     10     0      0      0
LAL.............2      1      1      1      1      1
Temp............85     80     77     75     74     73
RH..............67     79     84     89     92     94
20 ft wind......NE 3   NE 2   NE 2   NE 2   N 1    N 1
20 ft wind gust.12     12     9      7      6      6
Mix hgt (ft)....1600   500    500    500    400    400
Transport wind..NE 8   NE 8   E 10   E 7    NE 7   NE 7
Dispersion idx..21     4      2      3      3      3
LVORI...........3      4      5      6      6      6

.SATURDAY...

Sky/weather.........Sunny (10-20 percent). Isolated showers and
                    thunderstorms late in the afternoon.
Chance of pcpn......20 percent.
LAL.................1 until 1400, then 2.
Max temperature.....Around 91.
Min humidity........61 percent.
Wind (20 ft)........Light winds becoming northeast 5 to 7 mph in
                    the late morning and afternoon. Gusty and
                    erratic winds expected near thunderstorms late
                    in the afternoon.
Mixing height.......4900 ft AGL.
Transport winds.....Northeast 7 to 10 mph.
Dispersion index....5 increasing to 16 late in the morning, then
                    increasing to 27 late in the morning increasing
                    to 42 late in the morning increasing to 52
                    decreasing to 42 late in the afternoon.
LVORI...............4.

TIME (EDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........4      3      3      11     15     25
Weather cov.....                            ISOLTD ISOLTD
Weather type....NONE   NONE   NONE   NONE   RNSHWR RNSHWR
Tstm cov........                            ISOLTD ISOLTD
Chc of pcpn (%).0      0      0      0      20     20
LAL.............1      1      1      1      2      2
Temp............72     72     80     85     89     88
RH..............94     95     82     70     61     62
20 ft wind......N 2    NE 2   NE 5   NE 6   NE 6   NE 7
20 ft wind gust.6      7      10     12     13     14
Mix hgt (ft)....400    400    2000   3900   4900   3900
Transport wind..NE 7   NE 7   NE 9   N 10   NE 9   NE 9
Dispersion idx..2      7      27     46     54     49
LVORI...........7      6      3      2      1      1

$$
Forecaster...Wynn
Requested by...LRB
Type of request...PRESCRIBED
.TAG 2422779.0/TBW
.DELDT 09/20/24
.FormatterVersion 2.0.0
.EMAIL danny.harris@swfwmd.state.fl.us