370
FNUS72 KTBW 181155
FWSTBW

Spot Forecast for Chass 02K_03K...Florida Fish and Wildlife
National Weather Service Tampa Bay Ruskin FL
755 AM EDT Tue Aug 18 2026

Forecast is based on ignition time of 0800 EDT on August 18.
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.

...HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 7 PM EDT
THIS EVENING...

.DISCUSSION...

High pressure continues to be in control with warm and humid
conditions expected through the period with minimal fire
concerns. Moisture increase gradually through the week and along
with it chances of showers and storms. MOst of it today should
stay north of the I-4, but coverage will increase through the
week. The main concern will be the heat.

.REST OF TODAY...

Sky/weather.........Mostly sunny (30-40 percent). Isolated showers
                    and thunderstorms early in the morning, then
                    scattered showers and thunderstorms in the
                    afternoon.
Chance of pcpn......30 percent.
Max temperature.....Around 94.
Min humidity........65 percent.
Wind (20 ft)........West winds 6 to 13 mph. Gusty and erratic winds
                    expected near thunderstorms late in the
                    morning. Gusty and erratic winds expected near
                    thunderstorms in the afternoon.
Mixing height.......3000 ft AGL.
Transport winds.....West 9 to 15 mph.
Dispersion index....9 increasing to 47.
LVORI...............3.

TIME (EDT)      8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........25     27     32     27     34
Weather cov.....       ISOLTD SCTTRD SCTTRD SCTTRD
Weather type....NONE   RNSHWR RNSHWR RNSHWR RNSHWR
Tstm cov........       ISOLTD ISOLTD SCTTRD SCTTRD
Chc of pcpn (%).10     20     30     30     30
Temp............81     89     92     92     93
RH..............90     76     68     67     65
20 ft wind......W 6    W 9    W 12   W 12   W 13
20 ft wind gust.13     15     17     18     20
Mix hgt (ft)....600    2900   2900   3000   2900
Transport wind..W 9    W 13   W 14   W 14   W 15
Dispersion idx..9      34     48     45     48
LVORI...........5      3      1      1      1

.TONIGHT...

Sky/weather.........Partly cloudy (45-55 percent) then becoming
                    mostly cloudy (50-60 percent) then becoming
                    partly cloudy (30-40 percent). Isolated showers
                    and thunderstorms early in the evening.
                    Isolated showers and thunderstorms late in the
                    evening.
Chance of pcpn......20 percent.
Min temperature.....Around 79.
Max humidity........94 percent.
Wind (20 ft)........West winds 5 to 10 mph in the evening becoming
                    light, then becoming west around 5 mph
                    overnight. Gusty and erratic winds expected
                    near thunderstorms early in the evening. Gusty
                    and erratic winds expected near thunderstorms
                    late in the evening.
Mixing height.......400 ft AGL.
Transport winds.....West 9 to 15 mph.
Dispersion index....34 decreasing to 6.
LVORI...............5.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........48     61     57     54     44     29
Weather cov.....ISOLTD ISOLTD        ISOLTD ISOLTD ISOLTD
Weather type....RNSHWR RNSHWR NONE   RNSHWR RNSHWR RNSHWR
Tstm cov........ISOLTD ISOLTD        ISOLTD ISOLTD ISOLTD
Chc of pcpn (%).20     20     10     20     20     20
Temp............91     86     83     82     82     80
RH..............68     80     85     88     88     90
20 ft wind......W 10   W 7    W 6    W 5    W 5    W 5
20 ft wind gust.17     14     13     12     12     12
Mix hgt (ft)....2400   900    500    400    400    400
Transport wind..W 15   W 10   W 9    W 9    W 9    W 10
Dispersion idx..34     8      5      6      6      4
LVORI...........3      4      5      5      5      6

.WEDNESDAY...

Sky/weather.........Mostly sunny (40-50 percent). Numerous showers
                    in the morning. Scattered thunderstorms through
                    the day. Scattered showers in the afternoon.
Chance of pcpn......70 percent.
Max temperature.....Around 93.
Min humidity........69 percent.
Wind (20 ft)........West winds 5 to 10 mph. Gusty and erratic winds
                    expected near thunderstorms early in the
                    morning. Gusty and erratic winds expected near
                    thunderstorms early in the morning. Gusty and
                    erratic winds expected near thunderstorms late
                    in the morning, then gusty and erratic winds
                    expected near thunderstorms late in the
                    afternoon.
Mixing height.......3100 ft AGL.
Transport winds.....West 8 to 14 mph.
Dispersion index....6 increasing to 41.
LVORI...............4.

TIME (EDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........29     42     53     53     65     61
Weather cov.....ISOLTD SCTTRD NUMRUS SCTTRD SCTTRD SCTTRD
Weather type....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
Tstm cov........ISOLTD ISOLTD ISOLTD SCTTRD SCTTRD SCTTRD
Chc of pcpn (%).20     40     70     40     40     30
Temp............79     80     86     90     91     91
RH..............93     94     83     73     70     71
20 ft wind......W 5    W 5    W 7    W 8    W 10   W 9
20 ft wind gust.12     10     13     14     16     16
Mix hgt (ft)....400    700    2200   2500   2600   3000
Transport wind..W 8    W 8    W 10   W 12   W 13   W 12
Dispersion idx..4      8      22     34     39     42
LVORI...........6      6      3      3      3      3

$$
Forecaster...Pearce
Requested by...Melisa Thompson
Type of request...PRESCRIBED
.TAG 2619908.0/TBW
.DELDT 08/18/26
.FormatterVersion 2.0.0
.EMAIL melisa.thompson@myfwc.com