420
FNUS72 KMFL 171318
FWSMFL

Spot Forecast for Brighton Rx...Seminole Tribe of Florida
National Weather Service Miami FL
Issued by National Weather Service Key West FL
918 AM EDT Mon Aug 17 2026

Forecast is based on ignition time of 0900 EDT on August 17.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office at (305) 229-4522, if you have questions
or concerns with this forecast.

...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING...

.DISCUSSION...
Dry conditions expected today with generally East to southeasterly
winds around 10 mph. Dispersions will be generally fair to
good with RH values remaining well above critical levels.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
Chance of pcpn......0 percent.
Max temperature.....Around 98.
Min humidity........43 percent.
Wind (20 ft)........Light winds becoming west 5 to 6 mph in the
                    afternoon.
Mixing height.......5200 ft AGL.
Transport winds.....West 6 to 9 mph.
Dispersion index....14 increasing to 50.
LVORI...............3.

TIME (EDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........4   5   7   9   10  10  5   9   6
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0
Temp............81  88  91  93  94  96  97  96  98
RH..............91  75  66  60  56  51  46  48  43
20 FT wind dir..W   W   W   W   W   W   W   W   W
20 FT wind spd..3   3   3   3   5   5   6   6   6
20 FT wind gust.7   7   8   9   10  12  14  14  14
Mix hgt (kft)...1.4 2.3 3.3 3.8 4.4 5.0 5.1 5.1 5.2
Transp wind dir.SW  W   W   W   W   W   W   W   W
Transp wind spd.6   6   6   7   7   8   9   9   9
Dispersion idx..10  17  23  31  36  47  50  51  52
LVORI...........5   3   3   2   1   1   1   1   1

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent).
Chance of pcpn......0 percent.
Min temperature.....Around 75.
Max humidity........97 percent.
Wind (20 ft)........West winds around 6 mph early in the evening
                    becoming light.
Mixing height.......400 ft AGL.
Transport winds.....West 8 to 10 mph.
Dispersion index....40 decreasing to 5.
LVORI...............4.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........9   7   5   2   4   1   5   2   3   3   7   15
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............96  95  91  86  84  82  81  80  79  78  77  76
RH..............48  51  58  65  72  77  79  82  85  88  90  97
20 FT wind dir..W   W   W   W   W   W   NW  NW  W   W   W   W
20 FT wind spd..6   3   3   3   3   3   3   3   3   3   3   3
20 FT wind gust.14  12  10  10  12  13  13  12  12  10  9   9
Mix hgt (kft)...3.7 2.1 0.6 0.6 0.5 0.5 0.5 0.4 0.4 0.4 0.4 0.4
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.9   9   9   9   10  10  10  10  9   9   8   8
Dispersion idx..40  25  4   5   5   5   5   5   5   4   4   4
LVORI...........1   2   3   3   3   3   4   4   5   6   6   6

.TUESDAY...

Sky/weather.........Sunny (20-30 percent). Slight chance of showers
                    and thunderstorms late in the afternoon. Chance
                    of showers and thunderstorms late in the
                    afternoon.
Chance of pcpn......30 percent.
Max temperature.....Around 98.
Min humidity........46 percent.
Wind (20 ft)........Light winds becoming west 5 to 8 mph in the
                    late morning and afternoon. Gusty and erratic
                    winds expected near thunderstorms late in the
                    afternoon.
Mixing height.......5200 ft AGL.
Transport winds.....West 7 to 10 mph.
Dispersion index....5 increasing to 15 late in the morning, then
                    increasing to 26 late in the morning increasing
                    to 43 late in the morning increasing to 54
                    decreasing to 45 late in the afternoon.
LVORI...............5.

TIME (EDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........21     19     29     29     31     30
Weather cov.....                                   S CHC
Weather type....NONE   NONE   NONE   NONE   NONE   RNSHWR
Tstm cov........                                   S CHC
Chc of pcpn (%).0      0      0      0      0      20
Temp............76     77     87     92     96     97
RH..............94     97     77     62     51     46
20 FT wind dir..W      W      W      W      W      W
20 FT wind spd..3      3      5      6      7      8
20 FT wind gust.8      9      10     12     15     17
Mix hgt (ft)....500    500    2300   3900   5200   4200
Transport wind..W 7    W 7    W 9    W 10   W 10   NW 10
Dispersion idx..4      7      26     46     58     49
LVORI...........6      6      3      1      1      1

$$
Forecaster...Reynes
Requested by...Mike Lightsey
Type of request...PRESCRIBED
.TAG 2619830.0/MFL
.DELDT 08/17/26
.FormatterVersion 2.0.0