340  
FNCA72 TJSJ 291401  
FWSSJU  
 
SPOT FORECAST FOR LAGUNA CARTAGENA NWR SEVERITY FY-20...US FISH & WILDLIFE SERVICE  
NATIONAL WEATHER SERVICE SAN JUAN PR  
1001 AM AST MON JUN 29 2020  
 
FORECAST IS BASED ON FORECAST START TIME OF 1000 AST ON JUNE 29.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
QUESTIONS OR CONCERNS ABOUT THIS FORECAST, CONTACT (787) 253-4501.  
   
DISCUSSION
 
PARTLY CLOUDY SKIES WITH E TO NE WINDS PEAKING AT  
10-15 MPH ARE EXPECTED TODAY. THEN, AFTERNOON SHOWERS AND ISOLATED  
THUNDERSTORMS WILL DEVELOP, PRODUCING MODERATE TO HEAVY RAIN, AND  
GENERATING HIGHER WIND GUSTS UP TO 25 MPH AND LIGHTNING STRIKES.  
SHOWERS ARE EXPECTED TO DIMINISH AROUND SUNSET, LEAVING MOSTLY  
CLEAR TO PARTLY CLOUDY SKIES OVERNIGHT. DAYTIME HIGH TEMPERATURES  
IN THE UPPER 80S TO LOWER 90S WITH HEAT INDEX IN THE MID 90S TO  
LOWER 100S, WHILE OVERNIGHT LOW TEMPERATURES ARE FORECAST TO DROP  
INTO THE LOW TO MID 70S. A SIMILAR WEATHER PATTERN IS EXPECTED ON  
TUESDAY, BUT WITH A LOWER CHANCE FOR SHOWER ACTIVITY SINCE A MORE  
EAST TO SOUTHEAST WIND FLOW WILL FAVOR SHOWER ACTIVITY OVER  
NORTHWESTERN PUERTO RICO.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (70-80 PERCENT). SCATTERED  
SHOWERS EARLY IN THE AFTERNOON. NUMEROUS  
SHOWERS AND ISOLATED THUNDERSTORMS LATE IN THE  
AFTERNOON.  
CHANCE OF PCPN......70 PERCENT.  
LAL.................NO TSTMS UNTIL 1500, THEN 1-8 STRIKES.  
MAX TEMPERATURE.....AROUND 88.  
MIN HUMIDITY........57 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......EAST WINDS 6 TO 8 MPH. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS LATE IN THE  
AFTERNOON.  
MIXING HEIGHT.......4500 FT AGL.  
TRANSPORT WINDS.....EAST 6 TO 9 MPH.  
SMOKE DISPERSAL.....FAIR (19300 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO GOOD (30800 KNOT-FT) IN THE  
AFTERNOON.  
DISPERSION..........6.  
 
TIME (AST) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........30 30 70 70 70 79 79 79  
WEATHER COV.....ISO ISO SCT SCT SCT NUM NUM NUM  
WEATHER TYPE....RW RW RW RW RW RW RW RW  
TSTM COV........ ISO ISO ISO  
CHC OF PCPN (%).10 10 50 50 50 70 70 70  
LAL.............1 1 1 1 1 2 2 2  
TEMP............86 87 88 88 88 88 87 85  
RH..............59 57 57 58 59 60 62 65  
20 FT WIND DIR..SE SE SE E E E E E  
20 FT WIND SPD..7 7 7 7 7 6 6 6  
20 FT WIND GUST.8 8 8 8 8 7 7  
MIX HGT (KFT)...3.5 4.3 4.5 4.3 3.9 3.5 3.1 2.6  
MIXNG WIND DIR..E E E E E E E E  
MIXNG WIND SPD..7 6 7 8 9 9 9 9  
DISPERSION......6 6 6 6 6 6 6 6  
VRATE KT-FT/100019 22 26 30 31 29 26 21  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING  
PARTLY CLOUDY (20-30 PERCENT). SCATTERED  
SHOWERS IN THE EVENING, THEN ISOLATED SHOWERS  
OVERNIGHT.  
CHANCE OF PCPN......50 PERCENT.  
LAL.................NO TSTMS.  
MIN TEMPERATURE.....AROUND 77.  
MAX HUMIDITY........81 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......EAST WINDS 5 TO 8 MPH.  
MIXING HEIGHT.......200 FT AGL.  
TRANSPORT WINDS.....EAST 5 TO 9 MPH.  
SMOKE DISPERSAL.....FAIR (13900 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (900 KNOT-FT) LATE IN THE  
NIGHT.  
DISPERSION..........5.  
 
TIME (AST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........65 65 65 56 56 56 29 29 29 22 22 22  
WEATHER COV.....SCT SCT SCT SCT SCT SCT ISO ISO ISO ISO ISO ISO  
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW  
TSTM COV........  
CHC OF PCPN (%).50 50 50 40 40 40 10 10 10 20 20 20  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
TEMP............83 82 81 80 79 79 78 78 77 77 77 79  
RH..............70 74 77 79 79 80 80 80 81 81 79 74  
20 FT WIND DIR..E NE N N N N NE E E E E E  
20 FT WIND SPD..6 5 5 5 5 5 6 6 6 6 6 7  
20 FT WIND GUST. 6 6 6 6 6 7 7 7 7 8  
MIX HGT (KFT)...1.8 1.0 0.4 0.2 0.2 0.3 0.3 0.3 0.3 0.2 0.2 0.3  
MIXNG WIND DIR..E E E E E E E E E E E E  
MIXNG WIND SPD..9 8 8 8 7 7 6 5 5 6 7 8  
DISPERSION......6 6 5 5 5 5 3 3 3 4 4 5  
VRATE KT-FT/100014 7 3 1 1 2 1 1 1 1 1 2  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). ISOLATED SHOWERS  
EARLY IN THE MORNING, THEN SCATTERED SHOWERS IN  
THE LATE MORNING AND AFTERNOON.  
CHANCE OF PCPN......40 PERCENT.  
LAL.................NO TSTMS.  
MAX TEMPERATURE.....AROUND 89.  
MIN HUMIDITY........57 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......EAST WINDS 9 TO 14 MPH.  
MIXING HEIGHT.......4100 FT AGL.  
TRANSPORT WINDS.....EAST 9 TO 17 MPH.  
SMOKE DISPERSAL.....POOR (4900 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO EXCELLENT (61200 KNOT-FT) IN THE  
AFTERNOON.  
DISPERSION..........6.  
 
TIME (AST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........29 29 29 47 47 47 53 53 53 62 62 62  
WEATHER COV.....ISO ISO ISO SCT SCT SCT SCT SCT SCT SCT SCT SCT  
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW  
TSTM COV........  
CHC OF PCPN (%).20 20 20 30 30 30 30 30 30 40 40 40  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
TEMP............81 83 84 86 87 88 88 89 89 89 88 86  
RH..............70 67 65 63 61 60 59 58 57 58 60 63  
20 FT WIND DIR..E E E E E E SE SE SE SE E E  
20 FT WIND SPD..8 9 10 11 12 12 13 13 13 12 11 10  
20 FT WIND GUST.10 12 14 14 14 16 17 17 17 16 14 14  
MIX HGT (KFT)...0.6 1.1 1.8 2.6 3.5 4.1 4.1 3.9 3.6 3.6 3.5 3.2  
MIXNG WIND DIR..E E E E E E E SE SE SE E E  
MIXNG WIND SPD..9 10 12 13 15 16 17 17 17 17 16 14  
DISPERSION......6 6 6 6 6 6 6 6 6 6 6 6  
VRATE KT-FT/10005 10 18 30 45 57 61 59 54 52 48 38  
 

 
FORECASTER...COLON  
REQUESTED BY...JOSE M. MARTINEZ  
TYPE OF REQUEST...WILDFIRE  
.TAG 2008700.0/SJU  
.DELDT 06/29/20  
.FORMATTERVERSION 1.0.26  
.EMAIL FIREJUMBO76@HOTMAIL.COM  
 
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