118  
FNUS72 KMFL 160811  
FWSMFL  
 
SPOT FORECAST FOR JUNO DUNES 11/12A...PALM BEACH COUNTY ENV. RESOURCES MGMT  
NATIONAL WEATHER SERVICE MIAMI FL  
411 AM EDT THU AUG 16 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 0900 EDT ON AUGUST 16.  
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.  
   
DISCUSSION
 
 
PERSISTENT SOUTHEASTERLY FLOW IS GENERALLY EXPECTED, THOUGH SOME  
VARIABILITY IN DIRECTION AND WIND SPEED IS POSSIBLE WITH SEA  
BREEZE DEVELOPMENT AND ANY OUTFLOW FROM CONVECTION TODAY. THERE  
IS THE POSSIBILITY FOR MORNING SHOWERS AND STORMS. THE PEAK OF  
CONVECTIVE ACTIVITY SHOULD BE FAR TO THE WEST OF THE SITE LATER IN  
THE AFTERNOON. TEMPERATURES WILL REACH TO AROUND 90 WITH HEAT  
INDEX VALUES THAT COULD REACH INTO THE LOWER 100S. POOR TO FAIR  
DISPERSIONS TO START THE DAY SHOULD IMPROVE SLIGHTLY BY THE  
AFTERNOON.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). A SLIGHT CHANCE  
OF SHOWERS AND THUNDERSTORMS.  
MAX TEMPERATURE.....AROUND 89.  
MIN HUMIDITY........69 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 8 TO 9 MPH. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS.  
CHANCE OF PCPN......20 PERCENT.  
LAL.................1-8 STRIKES.  
MIXING HEIGHT.......1100-2900 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 12 TO 17 MPH.  
DISPERSION INDEX....16...INCREASING TO 32,...THEN INCREASING TO 43  
EARLY...DECREASING TO 34 LATE IN THE AFTERNOON.  
LVORI...............3.  
 
TIME (EDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........34 34 34 34 34 35 35 35 51  
WEATHER COV.....SCH SCH SCH SCH SCH SCH SCH SCH SCH  
WEATHER TYPE....RW RW RW RW RW RW RW RW RW  
TSTM COV........SCH SCH SCH SCH SCH SCH SCH SCH SCH  
TEMP............84 85 87 87 88 88 88 87 86  
RH..............79 76 76 72 71 69 69 70 72  
20 FT WIND DIR..SE SE SE SE SE SE SE SE SE  
20 FT WIND DIR..120 120 120 120 130 130 130 120 120  
20 FT WIND SPD..8 8 9 9 9 8 8 8 8  
20 FT WIND GUST.10 11 12 12 12 11 11 10 10  
MIX HGT (KFT)...1.1 1.9 2.6 2.7 2.8 2.9 2.6 2.2 1.8  
TRANSP WIND DIR.SE SE SE SE SE SE SE SE SE  
TRANSP WIND SPD.12 14 16 17 16 15 16 16 16  
DISPERSION IDX..16 32 45 46 45 43 42 40 34  
LVORI...........4 3 3 2 2 2 2 2 3  
CHC OF PCPN (%).20 20 20 20 20 20 20 20 20  
LAL.............2 2 2 2 2 2 2 2 2  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (45-55 PERCENT)...THEN BECOMING  
PARTLY CLOUDY (40-50 PERCENT)...THEN BECOMING  
MOSTLY CLOUDY (50-60 PERCENT). A SLIGHT CHANCE  
OF SHOWERS AND THUNDERSTORMS IN THE EVENING. A  
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS  
EARLY IN THE MORNING.  
MIN TEMPERATURE.....AROUND 78.  
MAX HUMIDITY........87 PERCENT.  
WIND (20 FT)........EAST WINDS 5 TO 8 MPH. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS IN THE EVENING.  
GUSTY AND ERRATIC WINDS EXPECTED NEAR  
THUNDERSTORMS EARLY IN THE MORNING.  
CHANCE OF PCPN......20 PERCENT.  
LAL.................1-8 STRIKES UNTIL 2300,...THEN NO TSTMS UNTIL  
0200,...THEN 1-8 STRIKES.  
MIXING HEIGHT.......300-1400 FT AGL.  
TRANSPORT WINDS.....EAST 6 TO 13 MPH.  
DISPERSION INDEX....22...DECREASING TO 8.  
LVORI...............4.  
 
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........51 51 51 51 51 51 51 51 44 44 44 54  
WEATHER COV.....SCH SCH SCH SCH SCH SCH SCH SCH SCH  
WEATHER TYPE....RW RW RW RW RW RW RW RW RW  
TSTM COV........SCH SCH SCH SCH SCH SCH SCH SCH SCH  
TEMP............85 83 82 81 81 81 81 81 81 80 80 79  
RH..............75 76 79 81 80 80 80 82 83 84 82 84  
20 FT WIND DIR..SE SE SE SE E E E E E E E E  
20 FT WIND DIR..120 120 120 120 110 100 100 110 110 110 110 110  
20 FT WIND SPD..7 6 5 5 6 6 6 6 6 7 8 8  
20 FT WIND GUST.8 7 6 6 7 7 7 7 7 8 10 10  
MIX HGT (KFT)...1.4 0.9 0.4 0.4 0.4 0.3 0.3 0.3 0.3 0.4 0.4 0.4  
TRANSP WIND DIR.SE SE SE SE E E E E E E E E  
TRANSP WIND SPD.13 9 6 6 6 7 7 7 7 8 8 8  
DISPERSION IDX..22 11 5 4 5 6 6 6 6 7 7 7  
LVORI...........3 4 4 4 4 4 4 4 5 5 5 5  
CHC OF PCPN (%).20 20 20 20 20 10 10 10 20 20 20 20  
LAL.............2 2 2 2 2 1 1 1 2 2 2 2  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT). A SLIGHT CHANCE  
OF SHOWERS AND THUNDERSTORMS THROUGH EARLY  
AFTERNOON.  
MAX TEMPERATURE.....AROUND 89.  
MIN HUMIDITY........66 PERCENT.  
WIND (20 FT)........EAST WINDS 7 TO 9 MPH. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS THROUGH EARLY  
AFTERNOON.  
CHANCE OF PCPN......20 PERCENT.  
LAL.................1-8 STRIKES UNTIL 1400,...THEN NO TSTMS.  
MIXING HEIGHT.......500-2400 FT AGL...INCREASING TO 1900-2600 FT  
AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....EAST 9 TO 14 MPH.  
DISPERSION INDEX....13...INCREASING TO 34,...THEN INCREASING TO 37  
EARLY IN THE AFTERNOON...DECREASING TO 26 LATE  
IN THE AFTERNOON.  
LVORI...............4.  
 
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY (%).........54 30 30 48 24 24  
WEATHER COV.....S CHC S CHC S CHC S CHC  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR NONE NONE  
TSTM COV........S CHC S CHC S CHC S CHC  
TEMP............79 81 86 88 88 88  
RH..............87 84 75 70 69 66  
20 FT WIND DIR..E E E E E E  
20 FT WIND DIR..110 100 110 110 100 090  
20 FT WIND SPD..8 7 8 8 8 8  
20 FT WIND GUST.10 8 10 11 10 10  
MIX HGT (FT)....500 600 1800 2500 2600 2200  
TRANSPORT WIND..E 9 E 10 E 13 SE 14 E 12 E 12  
DISPERSION IDX..8 10 29 41 35 28  
LVORI...........5 4 3 2 2 3  
CHC OF PCPN (%).20 20 20 20 10 10  
LAL.............2 2 2 2 1 1  
 

 
FORECASTER...GARCIA  
REQUESTED BY...HARPER CARROLL  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1814593.0/MFL  
 
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