258
FNUS72 KMLB 200823
FWSMLB

Spot Forecast for SFWMD Dupuis Unit 1-3...SFWMD
National Weather Service Melbourne FL
423 AM EDT Wed Aug 20 2025

Forecast is based on ignition time of 0800 EDT on August 20.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...

Coastal showers are forecast to remain east of the burn site this
morning with an increasing 50 percent chance of showers and storms
late this afternoon and evening. North-northwest winds increase to
around 10-15 mph and will allow for Generally Good afternoon smoke
dispersion. There are no min RH concerns. Temperatures reach the
mid 90s with peak heat index values between 103-107 degrees.

.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent). Slight chance of showers
                    and thunderstorms early in the afternoon.
                    Chance of showers and thunderstorms late in the
                    afternoon.
Chance of pcpn......50 percent.
Max temperature.....Around 94.
Min humidity........55 percent.
Wind (20 ft)........Northwest winds 9 to 12 mph. Gusty and erratic
                    winds expected near thunderstorms in the
                    afternoon.
Mixing height.......2400 ft AGL increasing to 4500 ft AGL late in
                    the morning.
Transport winds.....Northwest 13 to 14 mph.
Dispersion index....13 increasing to 55 late in the morning increasing
to 57 decreasing to 46 late in the afternoon.
LVORI...............6 decreasing to 1.

TIME (EDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........9   18  7   12  10  17  18  18  18  28
Weather cov.....                    SCH CHC CHC CHC CHC
Weather type....                    RW  RW  RW  RW  RW
Tstm cov........                    SCH CHC CHC CHC CHC
Chc of pcpn (%).0   0   0   10  10  20  30  40  40  50
Temp............78  81  86  88  90  91  92  92  93  92
RH..............97  88  75  70  65  62  60  58  55  56
20 FT wind dir..NW  NW  NW  NW  NW  W   W   W   W   NW
20 FT wind spd..10  10  10  10  10  12  12  10  10  9
20 FT wind gust.16  16  17  17  17  18  18  17  17  16
Mix hgt (kft)...0.8 1.7 2.4 3.2 3.6 3.9 4.3 4.5 4.3 3.7
Transp wind dir.NW  NW  NW  NW  NW  W   W   W   W   NW
Transp wind spd.13  13  13  14  13  14  14  14  13  13
Dispersion idx..13  28  38  50  50  55  59  61  53  46
LVORI...........6   4   3   3   1   1   1   1   1   1

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent) then becoming
                    mostly clear (5-15 percent). Chance of showers
                    and thunderstorms early in the evening.
Chance of pcpn......50 percent.
Min temperature.....Around 76.
Max humidity........99 percent.
Wind (20 ft)........Northwest winds 6 to 8 mph shifting to the
                    north around 5 mph early in the evening, then
                    becoming light in the late evening and
                    overnight becoming west 5 to 6 mph after 3 am.
                    Gusty and erratic winds expected near
                    thunderstorms early in the evening.
Mixing height.......400 ft AGL.
Transport winds.....Northwest 5 to 9 mph shifting to the west 6 to
                    10 mph late in the evening.
Dispersion index....23 decreasing to 7.
LVORI...............3 increasing to 6.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........39     49     27     22     1      7
Weather cov.....CHANCE S CHC
Weather type....RNSHWR RNSHWR NONE   NONE   NONE   NONE
Tstm cov........CHANCE S CHC
Chc of pcpn (%).50     20     10     0      0      0
Temp............90     83     80     79     78     78
RH..............61     78     87     90     92     91
20 ft wind......NW 8   N 5    N 2    SW 3   SW 3   W 5
20 ft wind gust.14     10     9      10     12     12
Mix hgt (ft)....2300   500    400    400    400    400
Transport wind..NW 9   NW 8   NW 5   SW 6   W 8    W 8
Dispersion idx..23     4      3      3      4      5
LVORI...........2      4      5      6      6      6

.THURSDAY...

Sky/weather.........Mostly sunny (20-30 percent). Slight chance of
                    showers early in the morning. Slight chance of
                    thunderstorms late in the morning, then showers
                    and thunderstorms likely late in the afternoon.
Chance of pcpn......60 percent.
Max temperature.....Around 94.
Min humidity........59 percent.
Wind (20 ft)........West winds 6 to 10 mph. Gusty and erratic winds
                    expected near thunderstorms late in the
                    morning.
Mixing height.......2300 ft AGL increasing to 3900 ft AGL late in
                    the morning.
Transport winds.....West 8 to 15 mph.
Dispersion index....7 increasing to 47 late in the morning increasing
to 59 decreasing to 48 late in the afternoon.
LVORI...............7 decreasing to 1.

TIME (EDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........17        5         10        29
Weather cov.....          S CHC     S CHC     LIKELY
Weather type....NONE      RNSHWR    RNSHWR    RNSHWR
Tstm cov........                    S CHC     LIKELY
Chc of pcpn (%).0         20        20        60
Temp............76        83        90        92
RH..............99        82        64        59
20 FT wind......W 6G12    W 7G12    W 10G15   W 10G17
Mix hgt (ft)....400       1600      3300      3600
Transport wind..W 9       W 9       W 13      W 15
Dispersion idx..5         18        51        60
LVORI...........7         3         1         1

$$
Forecaster...Law
Requested by...James Schuette
Type of request...PRESCRIBED
.TAG 2520282.0/MLB
.DELDT 08/20/25
.FormatterVersion 2.0.0
.EMAIL james.schuette@yahoo.com