390  
FNUS72 KMLB 211037  
FWSMLB  
 
SPOT FORECAST FOR BB-SEVILLE...FFS  
NATIONAL WEATHER SERVICE MELBOURNE FL  
537 AM EST SAT DEC 21 2024  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 EST ON DECEMBER 21.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
DRY CONDITIONS WITH NO RAIN CHANCES THROUGH SUNDAY EVENING AS  
HIGH PRESSURE BUILDS OVER THE AREA BEHIND A WEAKENING COLD FRONT.  
WINDS NNW 5-10 MPH THIS MORNING SHIFT SUBTLY TO THE N IN THE  
AFTERNOON, THEN RETURN TO NNW AT AROUND 5 MPH TONIGHT. TODAY'S MIN  
RHS 45-50 PCT, AND AFTERNOON DISPERSION VALUES FAIR TO GENERALLY  
GOOD. GUSTY CONDITIONS DEVELOP SUNDAY AS WINDS SHIFT FROM NNW-N  
AT 5-10 MPH IN THE MORNING TO NNE-NE WHILE INCREASING TO 10-15  
MPH WITH GUSTS TO 20 MPH IN THE AFTERNOON. SUNDAY MIN RHS INCREASE TO  
55-60 PCT AS ONSHORE FLOW BRINGS ADDITIONAL MOISTURE, WITH  
DISPERSION VALUES GENERALLY TO VERY GOOD.  
   
TODAY
 
 
SKY/WEATHER.........SUNNY (5-15 PERCENT).  
CHANCE OF PCPN......0 PERCENT.  
LAL.................NO TSTMS.  
MAX TEMPERATURE.....AROUND 59.  
MIN HUMIDITY........45 PERCENT.  
WIND (20 FT)........NORTH WINDS 5 TO 10 MPH.  
MIXING HEIGHT.......2100 FT AGL INCREASING TO 3600 FT AGL IN THE  
AFTERNOON.  
TRANSPORT WINDS.....NORTH 10 TO 15 MPH, DECREASING TO AROUND 10 MPH  
IN THE AFTERNOON.  
DISPERSION INDEX....10 INCREASING TO 44 LATE IN THE AFTERNOON.  
LVORI...............4 DECREASING TO 1 IN THE AFTERNOON.  
 
TIME (EST) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........3 4 7 9 8 9 9 13 13 12  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0  
LAL.............1 1 1 1 1 1 1 1 1 1  
TEMP............43 47 50 53 56 58 58 59 58 56  
RH..............73 65 57 52 49 47 47 45 49 54  
20 FT WIND DIR..N N N N N N N N N N  
20 FT WIND SPD..7 7 7 7 7 7 7 7 7 6  
20 FT WIND GUST.15 14 12 10 10 10 9 10 10 10  
MIX HGT (KFT)...0.9 1.3 1.7 2.1 2.5 3.0 3.5 3.6 3.6 1.7  
TRANSP WIND DIR.N N N N N N N N N N  
TRANSP WIND SPD.13 12 10 10 9 9 9 10 10 10  
DISPERSION IDX..14 21 24 27 30 34 40 43 44 23  
LVORI...........4 3 2 2 2 1 1 1 1 2  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).  
CHANCE OF PCPN......0 PERCENT.  
LAL.................NO TSTMS.  
MIN TEMPERATURE.....AROUND 41.  
MAX HUMIDITY........91 PERCENT.  
WIND (20 FT)........NORTH WINDS AROUND 5 MPH.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....NORTH 10 TO 15 MPH.  
DISPERSION INDEX....6.  
LVORI...............INCREASING TO 5.  
 
TIME (EST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........11 10 11 9 10 12 12 12 14 16 18 18  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
TEMP............53 49 48 47 45 45 44 43 43 43 42 42  
RH..............62 74 75 74 78 78 78 79 79 81 84 82  
20 FT WIND DIR..N N N N N N N NW NW NW NW NW  
20 FT WIND SPD..6 5 5 5 5 5 5 5 5 5 5 5  
20 FT WIND GUST.12 13 13 13 13 12 10 9 9 9 9 9  
MIX HGT (KFT)...0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4  
TRANSP WIND DIR.N N N N N N N N N N N N  
TRANSP WIND SPD.10 12 13 12 13 13 12 12 10 13 12 12  
DISPERSION IDX..6 5 6 6 6 5 5 5 5 5 5 5  
LVORI...........3 3 3 3 4 4 4 4 4 4 5 4  
   
SUNDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).  
CHANCE OF PCPN......10 PERCENT.  
LAL.................NO TSTMS.  
MAX TEMPERATURE.....AROUND 65.  
MIN HUMIDITY........55 PERCENT.  
WIND (20 FT)........NORTH WINDS 5 TO 10 MPH, INCREASING TO 10 TO  
15 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......400-900 FT AGL INCREASING TO 2900-3500 FT AGL  
LATE IN THE MORNING.  
TRANSPORT WINDS.....NORTH 10 TO 15 MPH INCREASING TO 15 TO 20 MPH  
IN THE LATE MORNING.  
DISPERSION INDEX....INCREASING TO 61 LATE IN THE AFTERNOON.  
LVORI...............DECREASING TO 1.  
 
TIME (EST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........18 18 17 16 15 20 25 31 35 38 42 37  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 10 10 10 10 10  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
TEMP............42 42 45 51 55 59 62 64 63 62 61 58  
RH..............88 91 86 77 69 62 59 55 57 58 60 67  
20 FT WIND DIR..NW NW N N N N N N N N N N  
20 FT WIND SPD..6 6 7 7 8 9 9 10 12 12 12 10  
20 FT WIND GUST.9 9 12 13 15 15 16 16 17 17 18 18  
MIX HGT (KFT)...0.4 0.4 0.9 1.3 1.8 2.4 2.9 3.5 3.4 3.2 3.1 2.2  
TRANSP WIND DIR.N N N N N N N N N N N N  
TRANSP WIND SPD.12 12 14 15 16 16 16 16 17 18 18 17  
DISPERSION IDX..5 6 15 25 35 44 51 57 59 61 60 48  
LVORI...........5 6 4 3 3 1 1 1 1 1 1 1  
 

 
FORECASTER...HALEY  
REQUESTED BY...COLIN BOGERT  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2428808.1/MLB  
.DELDT 12/21/24  
.FORMATTERVERSION 2.0.0  
.EMAIL COLIN.BOGERT@FDACS.GOV  
 
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