248 
FNUS72 KMLB 190838
FWSMLB

Spot Forecast for SFWMD - LRUS - 10,11...South Florida Water Management District
National Weather Service Melbourne FL
438 AM EDT Tue Aug 19 2025

Forecast is based on ignition time of 0600 EDT on August 19. 
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...North to Northeast surface and transport winds will
produce Very Good dispersion this afternoon. Scattered afternoon
showers and storms mainly after 2 pm. 

.TODAY...

Sky/weather.........Partly Sunny. Chance of showers 
                    and Slight chance of thunderstorms in the afternoon. 
Chance of pcpn......50 percent. 
Max temperature.....Around 93. 
Min humidity........58 percent. 
Wind (20 ft)........Light winds becoming northeast 5 to 10 mph. 
                    Gusty and erratic winds expected near 
                    thunderstorms in the afternoon. 
Mixing height.......1500 ft AGL increasing to 4500 ft AGL. 
Transport winds.....Northeast 7 to 13 mph. 
Dispersion index....4 increasing to 57. 
LVORI...............7 decreasing to 1. 

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 
Sky (%).........13  12  12  10  9   10  21  32  28  30  40  33  
Weather cov.....                        SCH SCH CHC CHC CHC CHC 
Weather type....                        RW  RW  RW  RW  RW  RW  
Tstm cov........                        SCH SCH SCH SCH SCH SCH 
Chc of pcpn (%).0   0   10  0   10  10  20  20  40  50  50  40  
Temp............77  76  78  83  85  87  89  90  90  91  89  90  
RH..............94  97  94  80  75  70  64  62  60  58  61  60  
20 FT wind dir..N   N   NE  NE  NE  NE  NE  NE  NE  NE  NE  NE  
20 FT wind spd..3   5   6   6   7   8   8   8   9   10  10  10  
20 FT wind gust.7   7   8   10  12  13  14  15  13  15  15  15  
Mix hgt (kft)...0.4 0.4 0.6 1.5 2.4 3.4 3.9 4.2 4.4 4.5 3.5 3.8 
Transp wind dir.NE  NE  NE  NE  NE  NE  NE  N   N   NE  NE  NE  
Transp wind spd.7   7   8   9   9   10  12  10  10  12  12  13  
Dispersion idx..3   3   5   18  29  42  46  49  57  59  55  57  
LVORI...........7   7   6   3   3   3   1   1   1   1   1   1   

.TONIGHT...

Sky/weather.........Partly cloudy then becoming clear. 
                    Chance of showers and slight chance of thunderstorms 
                    early in the evening. 
Chance of pcpn......30 percent. 
Min temperature.....Around 75. 
Max humidity........97 percent. 
Wind (20 ft)........Northeast winds 5 to 10 mph shifting to the 
                    northwest 5 to 6 mph overnight. Gusty and 
                    erratic winds expected near thunderstorms early 
                    in the evening. 
Mixing height.......1800 ft AGL decreasing to 400 ft AGL early in 
                    the evening. 
Transport winds.....North 8 to 14 mph. 
Dispersion index....52 decreasing to 5. 
LVORI...............1 increasing to 6. 

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM   
Sky (%).........30     21     5      1      2      2      
Weather cov.....CHANCE                                    
Weather type....RNSHWR NONE   NONE   NONE   NONE   NONE   
Tstm cov........S CHC                                     
Chc of pcpn (%).30     10     10     0      0      0      
Temp............88     83     79     79     77     76     
RH..............63     74     85     88     90     94     
20 ft wind......NE 10  NE 7   NE 6   N 6    N 5    NW 6   
20 ft wind gust.15     14     10     9      8      9      
Mix hgt (ft)....3200   1000   700    400    400    400    
Transport wind..NE 14  NE 12  N 10   N 8    N 9    N 9    
Dispersion idx..52     6      5      4      4      5      
LVORI...........1      3      5      6      6      6      

.WEDNESDAY...

Sky/weather.........Partly Sunny. Chance of showers and 
                    thunderstorms late in the afternoon. 
Chance of pcpn......40 percent. 
Max temperature.....Around 94. 
Min humidity........56 percent. 
Wind (20 ft)........Northwest winds 6 to 9 mph. Gusty and erratic 
                    winds expected near thunderstorms late in the 
                    afternoon. 
Mixing height.......1800 ft AGL increasing to 5500 ft AGL. 
Transport winds.....North 8 to 14 mph. 
Dispersion index....5 increasing to 18 early in the morning, then 
                    increasing to 34 late in the morning increasing 
                    to 48 late in the morning increasing to 66 
                    increasing to 71 early in the afternoon 
                    decreasing to 56 decreasing to 43 late in the 
                    afternoon. 
LVORI...............7 decreasing to 1. 

TIME (EDT)      6 AM      9 AM      NOON      3 PM      
Sky (%).........2         7         13        20        
Weather cov.....                              CHANCE    
Weather type....NONE      NONE      NONE      RNSHWR    
Tstm cov........                              CHANCE    
Chc of pcpn (%).0         10        10        40        
Temp............76        82        90        91        
RH..............94        82        60        56        
20 FT wind......NW 6G10   N 8G13    NW 9G15   NW 9G16   
Mix hgt (ft)....400       1800      4300      5100      
Transport wind..N 8       N 13      N 14      N 10      
Dispersion idx..5         34        65        60        
LVORI...........6         3         1         1         

$$
Forecaster...Kelly
Requested by...David Schutt
Type of request...PRESCRIBED
.TAG 2520168.0/MLB
.DELDT 08/19/25
.FormatterVersion 2.0.0
.EMAIL dschutt@sfwmd.gov