680  
FNCA52 TJSJ 230825  
FWFSJU  
 
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO  
NATIONAL WEATHER SERVICE SAN JUAN PR  
425 AM AST SUN JUL 23 2017  
   
DISCUSSION
 
THE FIRE RISK IS EXPECTED TO REMAIN LOW THROUGHOUT  
THE DAY, HOWEVER AS A DRIER AIR MASS MOVES INTO THE FORECAST AREA  
TONIGHT INTO MONDAY, THE FIRE DANGER WILL THEN INCREASE ON MONDAY  
PARTICULARLY ACROSS THE SOUTHERN PLAINS OF PUERTO RICO.  
 
PRZ014-240830-  
SOUTHEAST COASTAL PLAINS-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR MCLEAR  
PRECIP TYPE SHOWERS NONE SHOWERS  
CHANCE PRECIP (%) 20 0 10  
TEMP (24H TREND) 92 (+2) 73 (0) 93  
RH % (24H TREND) 53 (-4) 100 (+5) 47  
20FTWND-VAL/AM(MPH) E 11 E 13  
20FTWND-RDG/PM(MPH) SE 14 E 9 E 14  
MIXING HGT(FT-AGL/MSL)5907 5783  
TRANSPORT WND (MPH) E 18 E 18  
VENT RATE (KT-FT) 94512 98658  
DISPERSION 5 5  
DSI 6 5 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ015-240830-  
SOUTHERN HILLS-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR MCLEAR  
PRECIP TYPE SHOWERS NONE SHOWERS  
CHANCE PRECIP (%) 10 0 10  
TEMP (24H TREND) 90 (+5) 68 (-2) 89  
RH % (24H TREND) 56 (-7) 100 (+2) 50  
20FTWND-VAL/AM(MPH) E 10 E 12  
20FTWND-RDG/PM(MPH) SE 12 E 8 E 13  
MIXING HGT(FT-AGL/MSL)5985 5818  
TRANSPORT WND (MPH) E 16 E 16  
VENT RATE (KT-FT) 89775 84480  
DISPERSION 5 5  
DSI 5 3 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ016-240830-  
NORTH COASTAL PLAINS-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY MCLEAR MCLEAR  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 30 0 10  
TEMP (24H TREND) 90 (+2) 75 (-1) 90  
RH % (24H TREND) 57 (-9) 97 (+2) 52  
20FTWND-VAL/AM(MPH) E 9 E 11  
20FTWND-RDG/PM(MPH) E 14 E 11 E 15  
MIXING HGT(FT-AGL/MSL)5494 5294  
TRANSPORT WND (MPH) E 16 E 16  
VENT RATE (KT-FT) 83504 78690  
DISPERSION 5 5  
DSI 6 6 6  
LAL 2 1 1  
HAINES INDEX 3 3 4  
 
REMARKS...NONE.  
 

 
 
PRZ017-240830-  
NORTHERN HILLS-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY MCLEAR MCLEAR  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 20 0 10  
TEMP (24H TREND) 89 (+3) 68 (-2) 89  
RH % (24H TREND) 57 (-9) 100 (+2) 51  
20FTWND-VAL/AM(MPH) E 8 E 10  
20FTWND-RDG/PM(MPH) E 11 E 7 NE 13  
MIXING HGT(FT-AGL/MSL)5656 5416  
TRANSPORT WND (MPH) E 15 E 14  
VENT RATE (KT-FT) 81705 74475  
DISPERSION 5 5  
DSI 6 4 6  
LAL 2 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ018-240830-  
WEST COAST-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE TSTMS SHOWERS SHOWERS  
CHANCE PRECIP (%) 30 0 20  
TEMP (24H TREND) 90 (-2) 73 (-1) 90  
RH % (24H TREND) 55 (-2) 100 (+5) 49  
20FTWND-VAL/AM(MPH) E 9 E 10  
20FTWND-RDG/PM(MPH) E 9 E 5 E 9  
MIXING HGT(FT-AGL/MSL)6030 5935  
TRANSPORT WND (MPH) E 13 E 13  
VENT RATE (KT-FT) 89895 89025  
DISPERSION 5 5  
DSI 6 5 6  
LAL 2 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ019-240830-  
EASTERN INTERIOR-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY MCLEAR MCLEAR  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 0 10  
TEMP (24H TREND) 88 (+2) 70 (-2) 88  
RH % (24H TREND) 59 (-7) 100 (+3) 53  
20FTWND-VAL/AM(MPH) E 9 E 10  
20FTWND-RDG/PM(MPH) E 12 E 8 E 12  
MIXING HGT(FT-AGL/MSL)5780 5580  
TRANSPORT WND (MPH) E 16 E 16  
VENT RATE (KT-FT) 80160 73948  
DISPERSION 5 5  
DSI 6 4 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ022-240830-  
LUQUILLO MOUNTAIN RANGE-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 60 0 20  
TEMP (24H TREND) 84 (+1) 70 (-1) 84  
RH % (24H TREND) 68 (-3) 100 (+2) 63  
20FTWND-VAL/AM(MPH) E 10 E 11  
20FTWND-RDG/PM(MPH) E 12 E 9 E 12  
MIXING HGT(FT-AGL/MSL)4667 4558  
TRANSPORT WND (MPH) E 16 E 17  
VENT RATE (KT-FT) 67410 69088  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ023-240830-  
CENTRAL MOUNTAIN RANGE-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY MCLEAR MCLEAR  
PRECIP TYPE TSTMS NONE SHOWERS  
CHANCE PRECIP (%) 20 0 10  
TEMP (24H TREND) 87 (+4) 65 (-3) 86  
RH % (24H TREND) 59 (-8) 100 (+2) 53  
20FTWND-VAL/AM(MPH) E 8 E 10  
20FTWND-RDG/PM(MPH) E 9 E 6 E 10  
MIXING HGT(FT-AGL/MSL)5606 5662  
TRANSPORT WND (MPH) E 13 E 13  
VENT RATE (KT-FT) 70915 64246  
DISPERSION 5 5  
DSI 5 2 5  
LAL 2 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ024-240830-  
CAYEY MOUNTAIN RANGE-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR MCLEAR  
PRECIP TYPE SHOWERS NONE SHOWERS  
CHANCE PRECIP (%) 40 0 10  
TEMP (24H TREND) 86 (+3) 70 (0) 86  
RH % (24H TREND) 64 (-4) 100 (+2) 59  
20FTWND-VAL/AM(MPH) E 10 E 11  
20FTWND-RDG/PM(MPH) E 12 E 8 E 13  
MIXING HGT(FT-AGL/MSL)4989 4882  
TRANSPORT WND (MPH) E 17 E 18  
VENT RATE (KT-FT) 73155 81736  
DISPERSION 5 5  
DSI 6 4 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ025-240830-  
VIEQUES-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 60 10 20  
TEMP (24H TREND) 89 (+1) 78 (-2) 89  
RH % (24H TREND) 64 (-5) 91 (+2) 66  
20FTWND-VAL/AM(MPH) E 13 E 13  
20FTWND-RDG/PM(MPH) E 13 E 13 E 13  
MIXING HGT(FT-AGL/MSL)3983 4088  
TRANSPORT WND (MPH) E 17 E 18  
VENT RATE (KT-FT) 59745 65408  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 3 4  
 
REMARKS...NONE.  
 

 
 
PRZ026-240830-  
CULEBRA-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 60 10 20  
TEMP (24H TREND) 90 (+3) 78 (-2) 90  
RH % (24H TREND) 68 (-5) 88 (-1) 69  
20FTWND-VAL/AM(MPH) E 14 E 14  
20FTWND-RDG/PM(MPH) E 14 E 14 E 14  
MIXING HGT(FT-AGL/MSL)3220 3515  
TRANSPORT WND (MPH) E 20 E 21  
VENT RATE (KT-FT) 57960 66785  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 3 4  
 
REMARKS...NONE.  
 

 
 
PRZ027-240830-  
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR MCLEAR  
PRECIP TYPE SHOWERS NONE SHOWERS  
CHANCE PRECIP (%) 10 0 10  
TEMP (24H TREND) 93 (+1) 74 (-1) 92  
RH % (24H TREND) 51 (-2) 98 (+6) 46  
20FTWND-VAL/AM(MPH) E 12 E 14  
20FTWND-RDG/PM(MPH) SE 14 E 10 SE 15  
MIXING HGT(FT-AGL/MSL)6221 6066  
TRANSPORT WND (MPH) E 16 E 17  
VENT RATE (KT-FT) 95424 93792  
DISPERSION 5 5  
DSI 6 5 6  
LAL 1 1 1  
HAINES INDEX 3 4 3  
 
REMARKS...NONE.  
 

 
 
VIZ001-240830-  
SAINT THOMAS AND SAINT JOHN-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 60 10 20  
TEMP (24H TREND) 90 (0) 76 (-3) 90  
RH % (24H TREND) 55 (-9) 93 (+3) 53  
20FTWND-VAL/AM(MPH) E 13 E 14  
20FTWND-RDG/PM(MPH) E 13 E 14 E 14  
MIXING HGT(FT-AGL/MSL)3259 3700  
TRANSPORT WND (MPH) E 20 E 21  
VENT RATE (KT-FT) 58662 66600  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 3 4  
 
REMARKS...NONE.  
 

 
 
VIZ002-240830-  
ST CROIX-  
425 AM AST SUN JUL 23 2017  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 60 10 20  
TEMP (24H TREND) 89 (0) 76 (-2) 90  
RH % (24H TREND) 56 (-10) 96 (+2) 57  
20FTWND-VAL/AM(MPH) E 13 E 14  
20FTWND-RDG/PM(MPH) E 13 E 14 E 14  
MIXING HGT(FT-AGL/MSL)3345 3815  
TRANSPORT WND (MPH) E 21 E 23  
VENT RATE (KT-FT) 60210 76300  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 3 4  
 
REMARKS...NONE.  
 

 
 
   
FORECAST FOR DAYS 3 THROUGH 7
 
 
   
TUESDAY
 
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE LOWER 70S. HIGHS IN THE MID 80S. NORTHEAST WINDS  
AROUND 10 MPH.    
WEDNESDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 70S. HIGHS IN THE  
MID 80S. NORTH WINDS AROUND 10 MPH.    
THURSDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 70S. HIGHS IN THE  
UPPER 80S. EAST WINDS AROUND 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE LOWER 70S. HIGHS IN THE UPPER  
80S. EAST WINDS AROUND 10 MPH.    
SATURDAY
 
MOSTLY CLEAR. LOWS IN THE LOWER 70S. HIGHS IN THE  
UPPER 80S. EAST WINDS AROUND 10 MPH.  
 

 
 
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