659
FNCA52 TJSJ 110714
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
314 AM AST THU SEP 11 2025
DISCUSSION
WINDS FROM THE SOUTHEAST AT 10 TO 15 MPH WITH HIGHER GUSTS
(MAINLY DUE TO SEA BREEZE) ACROSS THE FORECAST AREA TODAY.
HUMIDITY WILL DROP INTO THE MID OR LOW 50 PERCENT, PARTICULARLY
ACROSS SOUTHERN PR AND ST. CROIX, WHERE KBDI ARE ABOVE THE
THRESHOLD VALUES. A THIS TIME, THE FIRE DANGER RISK REMAINS LOW.
PRZ014-120715-
SOUTHEAST COASTAL PLAINS-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 0 20
TEMP (24H TREND) 92 (+2) 74 (-3) 93
RH % (24H TREND) 56 (-3) 94 (+4) 58
WIND 20FT/EARLY(MPH) SE 14 G19 E 10 SE 12 G17
WIND 20FT/LATE(MPH) SE 14 G19 E 10 SE 12 G17
MIXING HGT(FT-AGL/MSL)4780 4570
TRANSPORT WND (MPH) E 14 E 12
VENT RATE (KT-FT) 57360 45700
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-120715-
SOUTHERN HILLS-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 0 40
TEMP (24H TREND) 90 (+5) 70 (-5) 89
RH % (24H TREND) 59 (-8) 98 (+5) 60
WIND 20FT/EARLY(MPH) SE 11 E 8 SE 10
WIND 20FT/LATE(MPH) SE 11 E 8 SE 10
MIXING HGT(FT-AGL/MSL)5410 5150
TRANSPORT WND (MPH) E 13 E 10
VENT RATE (KT-FT) 59510 46350
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-120715-
NORTH COASTAL PLAINS-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 10 60
TEMP (24H TREND) 92 (+2) 74 (-3) 92
RH % (24H TREND) 60 (-7) 99 (+4) 60
WIND 20FT/EARLY(MPH) E 14 E 10 E 13
WIND 20FT/LATE(MPH) E 14 E 10 E 13
MIXING HGT(FT-AGL/MSL)5020 4910
TRANSPORT WND (MPH) E 12 E 9
VENT RATE (KT-FT) 50200 39280
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-120715-
NORTHERN HILLS-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 70 50 70
TEMP (24H TREND) 91 (+3) 71 (-3) 90
RH % (24H TREND) 59 (-6) 100 (+3) 62
WIND 20FT/EARLY(MPH) E 11 E 9 NE 11
WIND 20FT/LATE(MPH) E 11 E 9 NE 11
MIXING HGT(FT-AGL/MSL)5610 5260
TRANSPORT WND (MPH) E 8 SE 7
VENT RATE (KT-FT) 39270 31560
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-120715-
WEST COAST-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 10 50
TEMP (24H TREND) 93 (+2) 72 (-3) 92
RH % (24H TREND) 58 (-5) 99 (+2) 60
WIND 20FT/EARLY(MPH) E 13 E 10 SE 12
WIND 20FT/LATE(MPH) E 13 E 10 SE 12
MIXING HGT(FT-AGL/MSL)4860 4670
TRANSPORT WND (MPH) SE 10 SE 9
VENT RATE (KT-FT) 43740 37360
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-120715-
EASTERN INTERIOR-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 40
TEMP (24H TREND) 91 (+4) 71 (-4) 91
RH % (24H TREND) 59 (-8) 100 (+4) 59
WIND 20FT/EARLY(MPH) E 11 E 9 E 10
WIND 20FT/LATE(MPH) E 11 E 9 E 10
MIXING HGT(FT-AGL/MSL)6020 5500
TRANSPORT WND (MPH) SE 13 SE 10
VENT RATE (KT-FT) 66220 49500
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-120715-
LUQUILLO MOUNTAIN RANGE-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 50 40 60
TEMP (24H TREND) 86 (+5) 69 (-4) 86
RH % (24H TREND) 66 (-6) 100 (+1) 65
WIND 20FT/EARLY(MPH) E 11 E 8 SE 10
WIND 20FT/LATE(MPH) E 11 E 8 SE 10
MIXING HGT(FT-AGL/MSL)4670 4280
TRANSPORT WND (MPH) SE 13 SE 12
VENT RATE (KT-FT) 51370 42800
DISPERSION 5 5
DSI 5 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-120715-
CENTRAL MOUNTAIN RANGE-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 70 20 70
TEMP (24H TREND) 89 (+6) 68 (-4) 88
RH % (24H TREND) 59 (-9) 100 (+3) 63
WIND 20FT/EARLY(MPH) E 9 E 8 SE 8
WIND 20FT/LATE(MPH) E 9 E 8 SE 8
MIXING HGT(FT-AGL/MSL)6520 5690
TRANSPORT WND (MPH) E 7 SE 8
VENT RATE (KT-FT) 39120 39830
DISPERSION 5 5
DSI 5 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-120715-
CAYEY MOUNTAIN RANGE-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 40
TEMP (24H TREND) 86 (+3) 70 (-3) 86
RH % (24H TREND) 62 (-9) 100 (+1) 63
WIND 20FT/EARLY(MPH) E 10 E 6 SE 9
WIND 20FT/LATE(MPH) E 10 E 6 SE 9
MIXING HGT(FT-AGL/MSL)5220 4690
TRANSPORT WND (MPH) E 13 SE 10
VENT RATE (KT-FT) 57420 42210
DISPERSION 5 5
DSI 5 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-120715-
VIEQUES-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 20
TEMP (24H TREND) 91 (+2) 77 (-2) 91
RH % (24H TREND) 56 (-9) 94 (+4) 55
WIND 20FT/EARLY(MPH) E 12 E 10 E 10
WIND 20FT/LATE(MPH) E 12 E 10 E 10
MIXING HGT(FT-AGL/MSL)3410 3410
TRANSPORT WND (MPH) E 13 SE 13
VENT RATE (KT-FT) 37510 37510
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-120715-
CULEBRA-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 30
TEMP (24H TREND) 92 (+2) 77 (-3) 92
RH % (24H TREND) 56 (-12) 93 (+3) 54
WIND 20FT/EARLY(MPH) E 12 E 10 E 11
WIND 20FT/LATE(MPH) E 12 E 10 E 11
MIXING HGT(FT-AGL/MSL)3250 3350
TRANSPORT WND (MPH) E 15 SE 14
VENT RATE (KT-FT) 42250 40200
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-120715-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 0 20
TEMP (24H TREND) 92 (+1) 75 (-3) 93
RH % (24H TREND) 56 (0) 91 (+3) 57
WIND 20FT/EARLY(MPH) SE 19 G24 E 12 SE 16 G21
WIND 20FT/LATE(MPH) SE 19 G24 E 12 SE 16 G21
MIXING HGT(FT-AGL/MSL)4830 4750
TRANSPORT WND (MPH) E 17 SE 14
VENT RATE (KT-FT) 72450 57000
DISPERSION 5 5
DSI 5 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-120715-
SAINT THOMAS AND SAINT JOHN-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 30
TEMP (24H TREND) 89 (+2) 76 (-3) 89
RH % (24H TREND) 61 (-11) 95 (+2) 61
WIND 20FT/EARLY(MPH) E 13 E 11 E 11
WIND 20FT/LATE(MPH) E 13 E 11 E 11
MIXING HGT(FT-AGL/MSL)3360 3410
TRANSPORT WND (MPH) E 14 SE 15
VENT RATE (KT-FT) 40320 44330
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-120715-
ST CROIX-
314 AM AST THU SEP 11 2025
TODAY TONIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 50 30
TEMP (24H TREND) 91 (+3) 77 (-2) 91
RH % (24H TREND) 59 (-11) 93 (+1) 60
WIND 20FT/EARLY(MPH) E 12 E 11 E 11
WIND 20FT/LATE(MPH) E 12 E 11 E 11
MIXING HGT(FT-AGL/MSL)4340 4730
TRANSPORT WND (MPH) E 15 E 15
VENT RATE (KT-FT) 56420 61490
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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