290  
FOCA52 TJSJ 230820  
PFMSJU  
 
POINT FORECAST MATRICES  
NATIONAL WEATHER SERVICE SAN JUAN PR  
420 AM AST SUN JUL 23 2017  
 
PRZ001-232115-  
LUIS MUNOZ MARIN INTERNATIONAL AIRPORT-SAN JUAN  
18.43N 66.00W ELEV. 9 FT  
420 AM AST SUN JUL 23 2017  
 
DATE SUN 07/23/17 MON 07/24/17 TUE 07/25/17  
AST 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 90 80 90 80 89  
TEMP 80 86 89 90 88 83 82 80 81 86 89 90 88 83 82 80 81 85 88 89 87 82  
DEWPT 78 78 76 75 75 76 76 77 76 76 75 74 74 75 76 76 76 76 75 75 76 76  
RH 94 77 66 62 66 80 82 91 85 72 64 60 63 77 82 88 85 75 66 64 70 82  
WIND DIR E E E E E E E E E E E E E E E E E E E E E E  
WIND SPD 8 11 16 17 16 12 12 11 11 13 16 17 16 13 13 12 11 13 14 17 14 11  
CLOUDS B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC  
POP 12HR 30 10 10 30 30  
QPF 12HR 0.10 0 0.03 0.02 0.05  
RAIN SHWRS L C C S S S S S S S S S S S S C C C C S S C  
HEAT INDEX 87 98100101 98 91 89 87 87 96 99 99 97 90 89 86 87 94 98 99 98 89  
MAX HEAT 98 102 101 91 96 101 99 90 94 99 99  
 
DATE WED 07/26/17 THU 07/27/17 FRI 07/28/17 SAT 07/29/17  
AST 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 79 88 79 89 79 89 79 89  
TEMP 79 84 88 82 79 85 89 82 79 85 89 82 79 85 89 82  
DEWPT 77 77 76 74 78 77 74 75 77 76 76 77 78 77 76 76  
PWIND DIR E E SE E E E E E  
WIND CHAR GN GN GN GN GN GN GN GN  
AVG CLOUDS SC SC SC SC SC SC B1 SC SC SC SC SC B1 B1 B1 SC  
POP 12HR 40 40 30 40 20 30 30 30  
RAIN SHWRS C C C S S C C C S S C C C C C C  
TSTMS S S S S S S S  
 

 
 
PRZ002-232115-  
ROOSEVELT ROADS NAVAL AIRSTATION-CEIBA PR  
18.25N 65.63W ELEV. 39 FT  
420 AM AST SUN JUL 23 2017  
 
DATE SUN 07/23/17 MON 07/24/17 TUE 07/25/17  
AST 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 89 80 89 80 88  
TEMP 81 85 88 89 87 83 82 80 81 85 88 89 87 83 82 80 81 85 87 88 86 81  
DEWPT 77 78 76 75 75 76 76 76 75 74 74 74 74 75 75 75 76 76 75 76 76 77  
RH 88 80 68 64 68 80 82 88 82 70 63 61 65 77 79 85 85 75 68 68 72 88  
WIND DIR E E E E E E E E E E E E E E E E E E E E NE E  
WIND SPD 12 13 16 14 13 13 13 13 14 14 16 14 14 13 14 13 12 13 13 13 13 11  
CLOUDS B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 SC SC B1  
POP 12HR 30 10 20 30 30  
QPF 12HR 0.07 0.01 0.03 0.03 0.06  
RAIN SHWRS L C C S S S S S S S S S S S S C C C C C C C  
HEAT INDEX 88 97 99 99 96 91 89 86 87 93 97 98 95 90 89 85 87 94 96 99 96 88  
MAX HEAT 97 100 99 91 93 98 98 90 94 99 99  
 
DATE WED 07/26/17 THU 07/27/17 FRI 07/28/17 SAT 07/29/17  
AST 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 78 86 80 87 80 87 80 87  
TEMP 78 83 86 82 80 84 87 82 80 84 87 82 80 84 87 82  
DEWPT 77 77 76 76 78 76 76 77 76 75 78 78 77 77 77 76  
PWIND DIR E E SE SE E E E E  
WIND CHAR GN GN GN GN GN GN GN GN  
AVG CLOUDS B1 B1 B1 SC SC SC B1 SC SC SC SC SC B1 B1 B1 SC  
POP 12HR 50 50 40 40 30 30 30 30  
RAIN SHWRS C C C C C C C C C C C C C C C C  
TSTMS S S S S S S S  
 

 
 
PRZ007-232115-  
MERCEDITA AIRPORT-PONCE PR  
18.02N 66.56W ELEV. 26 FT  
420 AM AST SUN JUL 23 2017  
 
DATE SUN 07/23/17 MON 07/24/17 TUE 07/25/17  
AST 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 93 76 93 76 93  
TEMP 76 85 91 93 89 82 79 77 78 86 92 93 89 82 79 77 78 86 92 93 89 81  
DEWPT 75 76 75 73 73 74 75 75 75 75 72 72 72 72 73 74 74 74 71 72 73 75  
RH 97 75 60 52 59 77 88 94 91 70 52 51 57 72 82 90 88 68 51 51 59 82  
WIND DIR NE E SE SE SE E NE NE NE E SE SE SE E NE NE NE E SE SE SE N  
WIND SPD 8 11 16 18 17 10 9 9 10 14 17 18 18 11 9 9 9 12 16 19 17 5  
CLOUDS FW FW FW SC SC FW FW FW FW FW FW SC SC FW FW SC SC SC SC SC SC FW  
POP 12HR 10 5 10 5 20  
QPF 12HR 0.01 0 0.01 0 0.03  
RAIN SHWRS S S S S S S S S S S  
HEAT INDEX 94102102 97 88 95100101 96 87 94 99101 97 87  
MAX HEAT 94 103 101 86 95 101 100 85 94 101 100  
 
DATE WED 07/26/17 THU 07/27/17 FRI 07/28/17 SAT 07/29/17  
AST 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 75 91 76 92 76 92 76 92  
TEMP 76 85 91 81 77 86 92 81 77 86 92 81 77 86 92 81  
DEWPT 76 75 76 73 77 77 74 74 77 76 74 77 77 77 74 74  
PWIND DIR NE SE E SE E SE E SE  
WIND CHAR LT GN GN GN GN GN GN BZ  
AVG CLOUDS FW FW SC SC FW FW FW SC FW FW FW SC FW FW FW SC  
POP 12HR 10 10 10 20 10 20 10 20  
RAIN SHWRS S S S S S S S S S S S S S S S  
 

 
 
PRZ008-232115-  
RAFAEL HERNANDEZ AIRPORT-AGUADILLA PR  
18.50N 67.13W ELEV. 237 FT  
420 AM AST SUN JUL 23 2017  
 
DATE SUN 07/23/17 MON 07/24/17 TUE 07/25/17  
AST 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 88 79 88 79 88  
TEMP 78 84 87 88 86 82 81 79 80 84 87 88 86 82 81 79 80 84 87 88 86 82  
DEWPT 76 76 77 78 77 77 77 76 76 76 74 76 76 76 76 76 76 76 75 76 76 75  
RH 94 77 72 72 75 85 88 91 88 77 65 68 72 82 85 91 88 77 68 68 72 79  
WIND DIR E E NE E SE E E E E E E E E E E E E E E NE S E  
WIND SPD 9 11 14 17 12 17 14 12 12 14 16 19 19 18 16 12 10 12 16 18 9 4  
CLOUDS FW FW FW B1 B1 SC SC SC SC FW FW SC SC FW FW SC SC SC SC SC SC SC  
POP 12HR 30 5 10 10 20  
QPF 12HR 0.17 0 0.02 0.01 0.06  
RAIN SHWRS C C S S S S S S S S S S S S S  
HEAT INDEX 93 99102 97 90 88 86 93 95 99 96 89 87 86 93 96 99 96 89  
MAX HEAT 93 102 102 90 93 99 99 89 93 99 99  
 
DATE WED 07/26/17 THU 07/27/17 FRI 07/28/17 SAT 07/29/17  
AST 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 79 85 80 86 80 86 80 86  
TEMP 79 83 85 82 80 84 86 82 80 84 86 82 80 84 86 82  
DEWPT 77 77 77 76 75 77 77 79 76 76 77 79 77 76 78 78  
PWIND DIR E E E NE SE E E E  
WIND CHAR GN GN LT LT LT GN GN GN  
AVG CLOUDS SC SC SC SC FW FW SC SC FW FW SC SC FW FW SC SC  
POP 12HR 20 20 10 50 10 50 10 40  
RAIN SHWRS S S S S S S C C S S C C S S C C  
TSTMS S S S S S S  
 

 
 
PRZ010-232115-  
EUGENIO MARIA DE HOSTO AIRPORT-MAYAGUEZ PR  
18.27N 67.15W ELEV. 28 FT  
420 AM AST SUN JUL 23 2017  
 
DATE SUN 07/23/17 MON 07/24/17 TUE 07/25/17  
AST 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 89 76 88 76 89  
TEMP 77 83 88 89 86 80 78 77 78 83 87 88 85 80 78 76 78 84 88 89 85 79  
DEWPT 75 75 75 77 78 77 76 75 75 75 74 75 77 76 75 75 75 75 75 76 77 75  
RH 94 77 66 68 77 91 94 94 91 77 65 66 77 88 91 97 91 74 66 66 77 88  
WIND DIR E E NE W NE E NE NE E E E NW NW NE E E E E E SW E E  
WIND SPD 6 8 6 8 5 3 6 8 8 10 8 6 5 5 11 9 9 12 9 8 12 8  
CLOUDS FW FW FW B2 B2 FW FW FW FW FW FW B1 B1 FW FW SC SC SC SC B1 B1 SC  
POP 12HR 60 5 50 5 50  
QPF 12HR 0.51 0 0.15 0 0.33  
RAIN SHWRS L L C C S S S S C C S  
TSTMS S S S S  
HEAT INDEX 90 98102 98 87 90 95 98 96 86 92 98100 96  
MAX HEAT 90 102 102 87 90 98 99 92 100 99  
 
DATE WED 07/26/17 THU 07/27/17 FRI 07/28/17 SAT 07/29/17  
AST 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 74 88 76 89 76 89 76 89  
TEMP 75 82 88 80 76 84 89 80 77 84 89 80 77 84 89 80  
DEWPT 75 75 77 76 74 76 75 76 75 76 74 77 76 76 76 78  
PWIND DIR E E E SE E SE E W  
WIND CHAR LT LT LT GN LT LT LT LT  
AVG CLOUDS SC SC SC SC FW FW SC SC FW FW SC SC FW FW SC SC  
POP 12HR 20 50 10 50 10 50 10 50  
RAIN SHWRS S S C C S S C C S S C C S S C C  
TSTMS S S S S S S S S  
 

 
 
VIZ001-232115-  
CYRIL E. KING AIRPORT-ST THOMAS USVI  
18.33N 64.97W ELEV. 23 FT  
420 AM AST SUN JUL 23 2017  
 
DATE SUN 07/23/17 MON 07/24/17 TUE 07/25/17  
AST 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 90 79 90 79 89  
TEMP 81 86 89 90 88 83 82 80 81 86 89 90 88 83 82 80 81 85 88 89 87 83  
DEWPT 78 78 77 77 77 77 77 77 76 76 76 76 76 76 77 77 77 77 77 77 77 77  
RH 91 77 68 66 70 82 85 91 85 72 66 64 68 80 85 91 88 77 70 68 72 82  
WIND DIR E E E E E E E E E E E E E E E E E E E E E E  
WIND SPD 16 16 17 16 16 17 18 18 17 18 17 16 16 17 18 17 16 16 14 14 13 13  
CLOUDS B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 SC SC B1  
POP 12HR 30 10 20 40 40  
QPF 12HR 0.06 0.01 0.03 0.03 0.05  
RAIN SHWRS L C C S S S S S S S S S S S S C C C C S S C  
HEAT INDEX 89 98102103100 92 90 87 87 96100102 99 91 90 87 88 96100102 99 92  
MAX HEAT 98 103 103 92 96 102 102 91 96 102 102  
 
DATE WED 07/26/17 THU 07/27/17 FRI 07/28/17 SAT 07/29/17  
AST 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 80 85 79 86 79 86 79 86  
TEMP 80 83 85 81 79 83 86 81 79 83 86 81 79 83 86 81  
DEWPT 77 77 77 78 78 77 77 77 77 77 78 78 78 77 77 77  
PWIND DIR E E SE SE E E E E  
WIND CHAR GN GN BZ GN BZ GN BZ BZ  
AVG CLOUDS B1 B1 B1 SC SC SC B1 SC SC SC SC SC B1 B1 B1 SC  
POP 12HR 50 50 40 40 30 30 30 30  
RAIN SHWRS C C C C C C C C C C C C C C C C  
TSTMS S S S S S S S  
 

 
 
VIZ002-232115-  
HENRY E. ROHLSEN AIRPORT-ST CROIX USVI  
17.70N 64.80W ELEV. 74 FT  
420 AM AST SUN JUL 23 2017  
 
DATE SUN 07/23/17 MON 07/24/17 TUE 07/25/17  
AST 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 90 79 90 78 89  
TEMP 81 86 89 90 88 83 82 80 81 86 89 90 87 83 81 79 80 85 88 89 86 82  
DEWPT 78 78 77 77 77 77 77 77 76 76 76 76 76 76 77 78 77 77 77 77 77 77  
RH 91 77 68 66 70 82 85 91 85 72 66 64 70 80 88 97 91 77 70 68 75 85  
WIND DIR E E E E E E E E E E E E E E E E E E E E E E  
WIND SPD 14 16 16 16 16 16 16 17 17 17 17 16 16 16 17 17 17 16 16 13 13 12  
CLOUDS B1 SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC  
POP 12HR 30 10 20 20 20  
QPF 12HR 0.06 0.01 0.03 0.02 0.04  
RAIN SHWRS L C C S S S S S S S S S S S S S S S S S S S  
HEAT INDEX 89 98102103100 92 90 87 87 96100102 98 91 88 87 96100102 97 90  
MAX HEAT 98 103 103 92 96 102 102 89 96 102 102  
 
DATE WED 07/26/17 THU 07/27/17 FRI 07/28/17 SAT 07/29/17  
AST 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 78 86 78 87 78 87 78 87  
TEMP 78 83 86 81 78 83 87 81 78 83 87 81 78 83 87 81  
DEWPT 77 76 76 78 77 77 77 78 77 77 78 78 78 78 77 77  
PWIND DIR E E SE SE E E E E  
WIND CHAR GN GN BZ GN BZ GN BZ BZ  
AVG CLOUDS SC SC B1 SC SC SC B1 SC SC SC SC SC B1 B1 B1 SC  
POP 12HR 50 50 40 40 30 30 30 30  
RAIN SHWRS S C C C C C C C C C C C C C C C  
TSTMS S S S S S S S  
 

 
 
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