718  
FNUS72 KTAE 170703  
FWSTAE  
 
SPOT FORECAST FOR BU 21-25...TNC  
NATIONAL WEATHER SERVICE TALLAHASSEE FL  
303 AM EDT SUN MAY 17 2026  
 
FORECAST IS BASED ON IGNITION TIME OF 0900 EDT ON MAY 17.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE AT (850) 942-8833, IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION  
 
PATCHY FOG MAY BE PRESENT DURING THE EARLY MORNING HOURS TODAY  
AND SHOULD LIFT SOON AFTER DAYBREAK. TRANSPORT WINDS WILL BE  
SOUTHERLY AROUND 10-15 MPH TODAY. MINRH WILL BE ABOVE CRITICAL  
AROUND 50%. AFTERNOON HIGHS WILL BE IN THE LOW 90S WITH HEAT INDEX  
IN THE MID- 90S. THE DISPERSION INDEX WILL BE HIGH THIS AFTERNOON  
WITH VALUES REACHING THE 90S. THERE IS A VERY SLIGHT (<10%)  
CHANCE FOR SHOWERS AND THUNDERSTORMS THIS AFTERNOON THAT MAY  
DEVELOP LATE FROM THE ATLANTIC SEA BREEZE. THUNDERSTORM CHANCES  
INCREASE FOR MONDAY (AROUND 40%) WITH GUSTY AND ERRATIC WINDS  
POSSIBLE AND FREQUENT LIGHTNING.  
   
REST OF TODAY  
 
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).  
CWR.................10 PERCENT.  
MAX TEMPERATURE.....AROUND 90.  
MIN HUMIDITY........47 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH 5 TO 7 MPH IN THE  
AFTERNOON.  
MIXING HEIGHT.......6000 FT AGL.  
TRANSPORT WINDS.....SOUTH 7 TO 13 MPH.  
LVORI...............3.  
DISPERSION INDEX....15 INCREASING TO 82.  
 
TIME (EDT) 5AM 6AM 7AM 8AM 9AM 10A 11A 12P 1PM  
SKY (%).........42 42 42 15 15 15 16 16 16  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0 10 10 10 10 10 10  
TEMP............72 78 83 86 88 89 90 90 89  
RH..............87 74 63 55 52 48 47 47 48  
20 FT WIND DIR..S S S S S S S S S  
20 FT WIND SPD..2 3 3 5 6 7 7 6 6  
20 FT WIND GUST.8 9 10 13 14 15 15 14 14  
MIX HGT (KFT)...1.7 2.2 2.8 3.9 4.9 6.0 6.0 6.0 5.9  
TRANSP WIND DIR.S S S S S S S S S  
TRANSP WIND SPD.7 9 10 12 13 13 13 13 12  
DISPERSION......15 27 38 56 74 86 85 85 78  
LVORI...........4 3 1 1 1 1 1 1 1  
   
TONIGHT  
 
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).  
CWR.................10 PERCENT.  
MIN TEMPERATURE.....AROUND 69.  
MAX HUMIDITY........93 PERCENT.  
WIND (20 FT)........SOUTH WINDS AROUND 5 MPH EARLY IN THE EVENING  
BECOMING LIGHT.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....SOUTH 6 TO 10 MPH SHIFTING TO THE EAST 7 TO 9  
MPH OVERNIGHT.  
LVORI...............4.  
DISPERSION INDEX....53 DECREASING TO 4.  
 
TIME (EDT) 2 PM 4 PM 6 PM 8 PM 10 PM MIDNGT  
SKY (%).........15 15 12 8 8 25  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
CWR.............10 10 0 0 0 0  
TEMP............89 82 75 72 70 71  
RH..............48 65 79 84 87 87  
20 FT WIND......S 5 S 3 S 2 SE 2 E 3 E 3  
20 FT WIND GUST.12 9 7 7 9 12  
MIX HGT (FT)....4100 600 500 400 400 500  
TRANSPORT WIND..S 10 S 7 SE 6 SE 7 E 7 E 8  
DISPERSION......53 3 3 3 3 4  
LVORI...........1 3 4 5 6 6  
   
MONDAY  
 
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT). CHANCE OF SHOWERS  
AND THUNDERSTORMS IN THE AFTERNOON.  
CWR.................0 PERCENT INCREASING TO 40 PERCENT IN THE  
AFTERNOON.  
MAX TEMPERATURE.....AROUND 91.  
MIN HUMIDITY........45 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHEAST 5 TO 6 MPH.  
GUSTY AND ERRATIC WINDS EXPECTED NEAR  
THUNDERSTORMS IN THE AFTERNOON.  
MIXING HEIGHT.......6200 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 8 TO 12 MPH.  
LVORI...............4.  
DISPERSION INDEX....5 INCREASING TO 72 IN THE AFTERNOON.  
 
TIME (EDT) 2AM 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A 11A 12P 1PM  
SKY (%).........24 24 24 26 26 26 29 29 29 49 49 49  
WEATHER COV..... CHC CHC CHC CHC CHC CHC  
WEATHER TYPE.... RW RW RW RW RW RW  
TSTM COV........ CHC CHC CHC CHC CHC CHC  
CWR.............0 0 0 0 0 0 40 40 40 40 40 40  
TEMP............70 69 71 74 79 83 86 88 89 89 90 91  
RH..............90 93 90 87 79 70 63 59 56 54 49 45  
20 FT WIND DIR..E E SE SE SE SE SE SE SE SE SE SE  
20 FT WIND SPD..3 5 6 6 6 6 6 6 6 5 5 5  
20 FT WIND GUST.13 14 15 15 15 14 14 14 13 13 12 12  
MIX HGT (KFT)...0.6 0.8 0.9 1.8 2.6 3.5 4.4 5.3 6.2 6.0 5.9 5.7  
TRANSP WIND DIR.E SE SE SE SE SE SE SE SE SE SE SE  
TRANSP WIND SPD.10 10 12 12 12 12 10 10 10 10 9 8  
DISPERSION......4 5 14 27 39 50 58 65 75 68 61 54  
LVORI...........6 6 5 4 3 2 1 1 1 1 1 1  
 
 
FORECASTER...MONTGOMERY  
REQUESTED BY...CATHERINE RICKETTS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2613848.0/TAE  
.DELDT 05/17/26  
.FORMATTERVERSION 2.0.0  
.EMAIL C.RICKETTS@TNC.ORG  
CLICK HERE TO GO TO PREVIOUS BULLETINS.
The Nexlab FL Page
The Nexlab GA Page
The Nexlab AL Page
Main Text Page