637
FNCA52 TJSJ 040831
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
431 AM AST FRI JUL 4 2025
DISCUSSION
A TROPICAL WAVE WILL RESULT IN CLOUDINESS AND PASSING SHOWERS
ALONG THE SOUTHERN COASTAL PLAIN OF PUERTO RICO. THIS CONDITIONS
WILL KEPT THE RH VALUES ABOVE THE FIRE DANGER THRESHOLD TODAY.
WINDS WILL CONTINUE FROM THE EAST AT 15 KNOTS OR LESS WITH GUSTY
WINDS NEAR COASTAL AREAS AND NEAR THE STRONGEST SHOWERS IN THE
AFTERNOON. KDBI AND SOIL CONDITIONS REMAIN IN CRITICAL LEVELS,
HOWEVER GIVEN THE EXPECT CONDITIONS, THERE IS A LOW RISK OF FIRE
DANGER.
PRZ014-050830-
SOUTHEAST COASTAL PLAINS-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 30
TEMP (24H TREND) 91 (+2) 76 (-1) 92
RH % (24H TREND) 53 (-8) 84 (+1) 52
WIND 20FT/EARLY(MPH) SE 16 G21 E 14 G19 SE 17 G22
WIND 20FT/LATE(MPH) SE 16 G21 E 14 G19 SE 17 G22
MIXING HGT(FT-AGL/MSL)4910 4600
TRANSPORT WND (MPH) E 16 E 17
VENT RATE (KT-FT) 68740 69000
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-050830-
SOUTHERN HILLS-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 10 20
TEMP (24H TREND) 88 (+4) 72 (-2) 87
RH % (24H TREND) 61 (-5) 95 (+5) 62
WIND 20FT/EARLY(MPH) SE 12 E 11 SE 12
WIND 20FT/LATE(MPH) SE 12 E 11 SE 12
MIXING HGT(FT-AGL/MSL)5770 5420
TRANSPORT WND (MPH) E 15 E 16
VENT RATE (KT-FT) 75010 75880
DISPERSION 5 5
DSI 5 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-050830-
NORTH COASTAL PLAINS-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 40 40
TEMP (24H TREND) 89 (0) 76 (-1) 90
RH % (24H TREND) 65 (+1) 94 (+2) 64
WIND 20FT/EARLY(MPH) E 19 E 14 E 19
WIND 20FT/LATE(MPH) E 19 E 14 E 19
MIXING HGT(FT-AGL/MSL)4940 4840
TRANSPORT WND (MPH) E 14 E 16
VENT RATE (KT-FT) 59280 67760
DISPERSION 5 5
DSI 5 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-050830-
NORTHERN HILLS-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 50 60
TEMP (24H TREND) 88 (+1) 73 (0) 88
RH % (24H TREND) 65 (0) 96 (+1) 67
WIND 20FT/EARLY(MPH) E 14 E 12 E 16
WIND 20FT/LATE(MPH) E 14 E 12 E 16
MIXING HGT(FT-AGL/MSL)6090 5820
TRANSPORT WND (MPH) E 10 E 14
VENT RATE (KT-FT) 54810 69840
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-050830-
WEST COAST-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 30
TEMP (24H TREND) 91 (+1) 72 (-2) 91
RH % (24H TREND) 60 (-3) 98 (+4) 62
WIND 20FT/EARLY(MPH) E 13 E 13 SE 16
WIND 20FT/LATE(MPH) E 13 E 13 SE 16
MIXING HGT(FT-AGL/MSL)4440 4520
TRANSPORT WND (MPH) E 9 SE 13
VENT RATE (KT-FT) 35520 49720
DISPERSION 5 5
DSI 5 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-050830-
EASTERN INTERIOR-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 40
TEMP (24H TREND) 88 (+2) 74 (-1) 88
RH % (24H TREND) 66 (+2) 93 (+1) 64
WIND 20FT/EARLY(MPH) SE 13 E 12 SE 14
WIND 20FT/LATE(MPH) SE 13 E 12 SE 14
MIXING HGT(FT-AGL/MSL)6260 5490
TRANSPORT WND (MPH) E 15 SE 17
VENT RATE (KT-FT) 81380 82350
DISPERSION 5 5
DSI 5 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-050830-
LUQUILLO MOUNTAIN RANGE-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 40
TEMP (24H TREND) 84 (+4) 70 (-2) 85
RH % (24H TREND) 73 (-2) 100 (+1) 72
WIND 20FT/EARLY(MPH) E 11 E 11 E 13
WIND 20FT/LATE(MPH) E 11 E 11 E 13
MIXING HGT(FT-AGL/MSL)4020 3720
TRANSPORT WND (MPH) E 16 E 18
VENT RATE (KT-FT) 56280 59520
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-050830-
CENTRAL MOUNTAIN RANGE-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 60 30 40
TEMP (24H TREND) 87 (+5) 69 (-2) 86
RH % (24H TREND) 64 (-5) 98 (+3) 68
WIND 20FT/EARLY(MPH) SE 10 SE 8 SE 10
WIND 20FT/LATE(MPH) SE 10 SE 8 SE 10
MIXING HGT(FT-AGL/MSL)7540 6420
TRANSPORT WND (MPH) E 8 E 13
VENT RATE (KT-FT) 52780 70620
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-050830-
CAYEY MOUNTAIN RANGE-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 20 40
TEMP (24H TREND) 84 (+3) 71 (-1) 83
RH % (24H TREND) 70 (-1) 98 (0) 71
WIND 20FT/EARLY(MPH) E 11 E 10 SE 11
WIND 20FT/LATE(MPH) E 11 E 10 SE 11
MIXING HGT(FT-AGL/MSL)4910 4350
TRANSPORT WND (MPH) E 15 E 17
VENT RATE (KT-FT) 63830 65250
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-050830-
VIEQUES-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 40
TEMP (24H TREND) 89 (+1) 77 (0) 90
RH % (24H TREND) 64 (+4) 91 (+1) 60
WIND 20FT/EARLY(MPH) E 16 G18 E 14 G17 E 17 G20
WIND 20FT/LATE(MPH) E 16 G18 E 14 G17 E 17 G20
MIXING HGT(FT-AGL/MSL)3030 3070
TRANSPORT WND (MPH) E 18 E 20
VENT RATE (KT-FT) 48480 52190
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-050830-
CULEBRA-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 40
TEMP (24H TREND) 90 (+2) 76 (-3) 91
RH % (24H TREND) 67 (+2) 94 (+4) 62
WIND 20FT/EARLY(MPH) E 16 G19 E 13 G17 E 17 G21
WIND 20FT/LATE(MPH) E 16 G19 E 13 G17 E 17 G21
MIXING HGT(FT-AGL/MSL)2950 3130
TRANSPORT WND (MPH) E 18 E 20
VENT RATE (KT-FT) 47200 53210
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-050830-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE NONE
CHANCE PRECIP (%) 20 0 0
TEMP (24H TREND) 92 (+3) 76 (-1) 92
RH % (24H TREND) 50 (-10) 88 (+3) 53
WIND 20FT/EARLY(MPH) SE 19 G25 E 18 G23 SE 21 G27
WIND 20FT/LATE(MPH) SE 19 G25 E 18 G23 SE 21 G27
MIXING HGT(FT-AGL/MSL)4800 4790
TRANSPORT WND (MPH) E 16 E 21
VENT RATE (KT-FT) 67200 86220
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-050830-
SAINT THOMAS AND SAINT JOHN-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 40
TEMP (24H TREND) 85 (0) 74 (-4) 85
RH % (24H TREND) 75 (+5) 99 (+8) 72
WIND 20FT/EARLY(MPH) E 16 G20 E 13 G17 E 17 G21
WIND 20FT/LATE(MPH) E 16 G20 E 13 G17 E 17 G21
MIXING HGT(FT-AGL/MSL)2960 2900
TRANSPORT WND (MPH) E 20 E 22
VENT RATE (KT-FT) 50320 55100
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-050830-
ST CROIX-
431 AM AST FRI JUL 4 2025
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 40
TEMP (24H TREND) 87 (0) 75 (-3) 89
RH % (24H TREND) 68 (+4) 95 (+5) 64
WIND 20FT/EARLY(MPH) E 17 G21 E 13 E 16 G20
WIND 20FT/LATE(MPH) E 17 G21 E 13 E 16 G20
MIXING HGT(FT-AGL/MSL)3900 4340
TRANSPORT WND (MPH) E 20 E 22
VENT RATE (KT-FT) 66300 82460
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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