407  
FNUS72 KJAX 181211  
FWSJAX  
 
SPOT FORECAST FOR CRWMA 3-18-19...FWC  
NATIONAL WEATHER SERVICE JACKSONVILLE FL  
811 AM EDT MON MAR 18 2019  
 
FORECAST IS BASED ON IGNITION TIME OF 0900 EDT ON MARCH 18.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE AT (904) 741-4370, IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
..ELEVATED DISPERSION VALUES AND LOWER HUMIDITIES THIS AFTERNOON
 
 
   
DISCUSSION
 
 
A DRIER AIRMASS WILL PREVAIL TODAY WITH WINDS MAINLY NORTH TO  
NORTHEAST BUT SPEEDS ONLY UP TO THE 8 TO 12 MPH RANGE. RH VALUES  
WILL FALL INTO THE 30S THIS AFTERNOON UNDER GENERALLY PARTLY  
CLOUDY SKIES. DISPERSION VALUES MAY BE ELEVATED TODAY COMPARED  
TO SUNDAY DUE TO HIGHER MIXING HEIGHTS.  
 
CLOUDS AND MOISTURE LEVELS WILL INCREASE SLIGHTLY ON TUESDAY AS  
NORTHEAST WINDS INCREASE TO 10 TO 20 MPH AND GUSTY. SOME  
LIGHT RAINFALL POSSIBLE ACROSS NORTHEAST FLORIDA, MAINLY  
NEAR THE COAST.  
   
TODAY
 
 
TIME (EDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........74 72 70 62 54 44 45 43 44  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0  
TEMP............55 58 63 64 66 68 69 69 69  
RH..............71 62 52 56 48 42 39 36 35  
20 FT WIND DIR..N N N N N NE NE NE NE  
20 FT WIND SPD..3 5 5 6 8 8 7 7 7  
20 FT WIND GUST.6 7 7 9 11 11 10 10 10  
MIX HGT (KFT)...0.8 1.9 3.2 3.7 4.2 5.0 5.0 5.0 5.0  
TRANSP WIND DIR.N N NE NE N N N N N  
TRANSP WIND SPD.13 14 14 14 13 12 13 14 14  
DISPERSION IDX..15 26 34 36 54 69 73 75 79  
LVORI...........3 2 1 1 1 1 1 1 1  
   
TONIGHT
 
 
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........47 50 53 65 79 93 90 86 83 84 84 85  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............67 65 62 60 58 57 56 56 55 54 54 53  
RH..............37 40 44 49 55 59 59 59 59 61 61 64  
20 FT WIND DIR..NE NE NE NE NE N N N N N N N  
20 FT WIND SPD..6 3 3 2 2 2 2 3 3 3 3 3  
20 FT WIND GUST.8 6 5 5 5 5 6 6  
MIX HGT (KFT)...4.4 1.9 1.0 1.0 1.0 1.0 0.7 0.4 0.4 0.7 0.7 0.7  
TRANSP WIND DIR.NE NE NE NE NE NE NE N N N N N  
TRANSP WIND SPD.14 12 10 9 8 7 7 7 7 8 9 9  
DISPERSION IDX..67 28 5 4 4 3 3 3 3 4 6 6  
LVORI...........1 2 2 2 3 3 3 3 3 3 3 3  
   
TUESDAY
 
 
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........89 93 95 95 95 95 95 95 92 92 92 92  
WEATHER COV..... CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC  
WEATHER TYPE.... RN RN RN RN RN RN RN RN RN RN  
TSTM COV........  
CHC OF PCPN (%).10 10 30 30 30 30 30 30 30 30 30 30  
TEMP............53 52 52 54 58 61 63 64 65 66 66 66  
RH..............66 74 74 74 72 70 65 63 60 56 56 56  
20 FT WIND DIR..N N N N NE NE NE NE NE NE NE NE  
20 FT WIND SPD..3 5 5 7 8 10 12 12 12 13 13 13  
20 FT WIND GUST.6 7 7 10 13 16 17 17 17 18 18 18  
MIX HGT (KFT)...0.4 0.7 0.7 1.3 1.8 2.4 2.6 2.9 3.1 2.8 2.6 2.4  
TRANSP WIND DIR.N N N N NE NE NE NE NE NE NE NE  
TRANSP WIND SPD.9 9 10 13 15 17 18 20 21 22 23 23  
DISPERSION IDX..6 7 10 20 31 37 42 46 50 51 51 51  
LVORI...........3 4 4 3 3 3 1 1 1 1 1 1  
 

 
FORECASTER...SHASHY  
REQUESTED BY...JASON SLATER  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1903517.0/JAX  
.DELDT 03/18/19  
.FORMATTERVERSION 1.0.26  
.EMAIL JASON.SLATER@MYFWC.COM  
 
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