393
FNCA52 TJSJ 200847 CCA
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO...CORRECTED
NATIONAL WEATHER SERVICE SAN JUAN PR
447 AM AST MON JUL 20 2026
DISCUSSION
A FIRE DANGER STATEMENT (RFD) IS IN EFFECT FOR THE LOCAL AREA.
DESPITE A SLIGHT DECREASE IN WINDS TODAY, ELEVATED FIRE WEATHER
CONDITIONS WILL PERSIST DUE TO CRITICALLY DRY FUELS, VERY LOW
RELATIVE HUMIDITY, AND PROLONGED RAINFALL DEFICITS. SEVEN-DAY
PERCENT OF NORMAL RAINFALL REMAINS BELOW 25 PERCENT ACROSS MOST OF
PUERTO RICO, WITH SOME AREAS BELOW 5-10 PERCENT, PARTICULARLY ACROSS
THE SOUTHERN COASTAL PLAINS OF PUERTO RICO. ANY FIRES THAT DEVELOP
COULD SPREAD RAPIDLY THROUGH DRY VEGETATION, ESPECIALLY ACROSS
SOUTHERN PUERTO RICO.
FIRE WEATHER CONDITIONS WILL CONTINUE TO BE MONITORED CLOSELY, AND A
RED FLAG WARNING MAY BE REQUIRED IF CONDITIONS BECOME MORE FAVORABLE
FOR RAPID FIRE GROWTH. RESIDENTS AND VISITORS ARE URGED TO AVOID
OUTDOOR BURNING AND EXERCISE EXTREME CAUTION WITH OPEN FLAMES,
DISCARDED CIGARETTES, OR ANY ACTIVITY CAPABLE OF PRODUCING SPARKS.
PRZ014-202015-
SOUTHEAST COASTAL PLAINS-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 40
TEMP (24H TREND) 92 (+1) 73 (-4) 92
RH % (24H TREND) 46 (-4) 87 (+4) 46
WIND 20FT/EARLY(MPH) E 13 NE 13 G21 NE 11
WIND 20FT/LATE(MPH) E 18 G27 NE 8 E 14 G23
MIXING HGT(FT-AGL/MSL)5510 5720
TRANSPORT WND (MPH) E 16 E 10
VENT RATE (KT-FT) 77140 51480
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-202015-
SOUTHERN HILLS-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 10 0 50
TEMP (24H TREND) 90 (+3) 69 (-5) 90
RH % (24H TREND) 56 (-2) 96 (+7) 57
WIND 20FT/EARLY(MPH) E 13 NE 11 NE 10
WIND 20FT/LATE(MPH) E 14 NE 10 E 13
MIXING HGT(FT-AGL/MSL)6230 6200
TRANSPORT WND (MPH) E 13 NE 10
VENT RATE (KT-FT) 68530 55800
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-202015-
NORTH COASTAL PLAINS-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 40
TEMP (24H TREND) 91 (+1) 73 (-4) 91
RH % (24H TREND) 57 (-3) 95 (+6) 61
WIND 20FT/EARLY(MPH) E 17 E 16 E 13
WIND 20FT/LATE(MPH) NE 19 E 11 NE 14
MIXING HGT(FT-AGL/MSL)4740 4790
TRANSPORT WND (MPH) E 18 NE 14
VENT RATE (KT-FT) 75840 57480
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-202015-
NORTHERN HILLS-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 40
TEMP (24H TREND) 89 (0) 71 (-3) 89
RH % (24H TREND) 60 (+1) 97 (+4) 65
WIND 20FT/EARLY(MPH) E 14 E 13 E 12
WIND 20FT/LATE(MPH) NE 17 E 9 NE 12
MIXING HGT(FT-AGL/MSL)5970 5320
TRANSPORT WND (MPH) E 13 NE 14
VENT RATE (KT-FT) 65670 63840
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-202015-
WEST COAST-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 40 50
TEMP (24H TREND) 92 (+1) 71 (-3) 93
RH % (24H TREND) 59 (-2) 98 (+8) 56
WIND 20FT/EARLY(MPH) E 13 E 16 E 12
WIND 20FT/LATE(MPH) E 13 E 13 SE 16
MIXING HGT(FT-AGL/MSL)4860 4920
TRANSPORT WND (MPH) E 7 NE 9
VENT RATE (KT-FT) 29160 39360
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-202015-
EASTERN INTERIOR-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 20 50
TEMP (24H TREND) 90 (+2) 71 (-4) 91
RH % (24H TREND) 56 (-2) 95 (+5) 58
WIND 20FT/EARLY(MPH) E 13 NE 12 NE 10
WIND 20FT/LATE(MPH) E 13 NE 9 NE 11
MIXING HGT(FT-AGL/MSL)6570 6760
TRANSPORT WND (MPH) E 14 NE 13
VENT RATE (KT-FT) 78840 74360
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-202015-
LUQUILLO MOUNTAIN RANGE-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 60
TEMP (24H TREND) 86 (+5) 69 (-4) 86
RH % (24H TREND) 63 (-6) 98 (+5) 65
WIND 20FT/EARLY(MPH) E 12 NE 10 NE 8
WIND 20FT/LATE(MPH) E 12 NE 6 NE 10
MIXING HGT(FT-AGL/MSL)4730 5060
TRANSPORT WND (MPH) E 15 E 13
VENT RATE (KT-FT) 61490 55660
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-202015-
CENTRAL MOUNTAIN RANGE-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 50
TEMP (24H TREND) 88 (+3) 67 (-4) 87
RH % (24H TREND) 63 (+1) 99 (+5) 67
WIND 20FT/EARLY(MPH) E 10 NE 13 NE 11
WIND 20FT/LATE(MPH) NE 11 E 10 NE 11
MIXING HGT(FT-AGL/MSL)7310 6400
TRANSPORT WND (MPH) E 9 NE 13
VENT RATE (KT-FT) 58480 70400
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-202015-
CAYEY MOUNTAIN RANGE-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 40
TEMP (24H TREND) 86 (+3) 69 (-4) 87
RH % (24H TREND) 62 (-2) 99 (+3) 64
WIND 20FT/EARLY(MPH) E 11 NE 10 NE 10
WIND 20FT/LATE(MPH) E 12 NE 8 NE 11
MIXING HGT(FT-AGL/MSL)5530 6310
TRANSPORT WND (MPH) E 15 NE 14
VENT RATE (KT-FT) 71890 75720
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-202015-
VIEQUES-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 60
TEMP (24H TREND) 90 (+1) 78 (-2) 90
RH % (24H TREND) 57 (-2) 84 (+1) 56
WIND 20FT/EARLY(MPH) E 17 NE 16 NE 10
WIND 20FT/LATE(MPH) E 14 NE 12 NE 11
MIXING HGT(FT-AGL/MSL)3380 3240
TRANSPORT WND (MPH) E 17 NE 14
VENT RATE (KT-FT) 50700 38880
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-202015-
CULEBRA-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 60
TEMP (24H TREND) 90 (+2) 77 (-3) 91
RH % (24H TREND) 58 (-6) 87 (+4) 59
WIND 20FT/EARLY(MPH) E 16 NE 16 NE 11
WIND 20FT/LATE(MPH) E 14 NE 12 NE 11
MIXING HGT(FT-AGL/MSL)3360 3220
TRANSPORT WND (MPH) E 18 E 14
VENT RATE (KT-FT) 53760 38640
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-202015-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 20 70
TEMP (24H TREND) 92 (+1) 72 (-4) 93
RH % (24H TREND) 50 (-3) 91 (+10) 45
WIND 20FT/EARLY(MPH) E 14 G22 E 12 E 12
WIND 20FT/LATE(MPH) E 17 NE 12 S 16
MIXING HGT(FT-AGL/MSL)5490 4670
TRANSPORT WND (MPH) E 12 SE 6
VENT RATE (KT-FT) 54900 23350
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-202015-
SAINT THOMAS AND SAINT JOHN-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 60
TEMP (24H TREND) 87 (+1) 76 (-3) 89
RH % (24H TREND) 60 (-4) 89 (+5) 61
WIND 20FT/EARLY(MPH) E 17 NE 14 NE 11
WIND 20FT/LATE(MPH) E 14 NE 12 NE 11
MIXING HGT(FT-AGL/MSL)3370 3150
TRANSPORT WND (MPH) E 21 E 13
VENT RATE (KT-FT) 60660 34650
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-202015-
ST CROIX-
447 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 40
TEMP (24H TREND) 89 (+1) 77 (-2) 89
RH % (24H TREND) 60 (-4) 86 (0) 60
WIND 20FT/EARLY(MPH) E 16 NE 13 NE 10
WIND 20FT/LATE(MPH) E 14 NE 11 NE 11
MIXING HGT(FT-AGL/MSL)4560 4890
TRANSPORT WND (MPH) E 18 E 13
VENT RATE (KT-FT) 72960 53790
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page