879
FNCA52 TJSJ 190730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST SAT SEP 19 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-192000-
SOUTHEAST COASTAL PLAINS-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 40
TEMP (24H TREND) 91 (+1) 74 (-3) 90
RH % (24H TREND) 59 (+3) 92 (+4) 59
WIND 20FT/EARLY(MPH) E 12 E 10 E 12
WIND 20FT/LATE(MPH) SE 14 NE 6 SE 12
MIXING HGT(FT-AGL/MSL)4700 4440
TRANSPORT WND (MPH) E 9 SE 12
VENT RATE (KT-FT) 37600 44400
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-192000-
SOUTHERN HILLS-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 60 40 60
TEMP (24H TREND) 89 (+3) 71 (-4) 88
RH % (24H TREND) 63 (0) 98 (+5) 63
WIND 20FT/EARLY(MPH) E 9 E 8 E 10
WIND 20FT/LATE(MPH) SE 11 E 8 SE 10
MIXING HGT(FT-AGL/MSL)5490 5000
TRANSPORT WND (MPH) E 8 SE 10
VENT RATE (KT-FT) 38430 45000
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-192000-
NORTH COASTAL PLAINS-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 40 60
TEMP (24H TREND) 91 (+1) 74 (-3) 91
RH % (24H TREND) 62 (-2) 99 (+5) 61
WIND 20FT/EARLY(MPH) E 9 E 11 E 9
WIND 20FT/LATE(MPH) E 14 SE 9 E 14
MIXING HGT(FT-AGL/MSL)4750 4890
TRANSPORT WND (MPH) E 9 E 9
VENT RATE (KT-FT) 38000 39120
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-192000-
NORTHERN HILLS-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 50 90
TEMP (24H TREND) 89 (-1) 71 (-3) 90
RH % (24H TREND) 64 (+4) 100 (+3) 62
WIND 20FT/EARLY(MPH) E 8 E 9 E 8
WIND 20FT/LATE(MPH) E 12 SE 6 E 11
MIXING HGT(FT-AGL/MSL)5530 5270
TRANSPORT WND (MPH) E 7 SE 8
VENT RATE (KT-FT) 33180 36890
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-192000-
WEST COAST-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 70 70
TEMP (24H TREND) 92 (+1) 73 (-2) 92
RH % (24H TREND) 63 (+1) 99 (+2) 62
WIND 20FT/EARLY(MPH) E 9 E 11 E 11
WIND 20FT/LATE(MPH) E 10 E 10 E 12
MIXING HGT(FT-AGL/MSL)4930 4580
TRANSPORT WND (MPH) E 7 SE 9
VENT RATE (KT-FT) 29580 36640
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-192000-
EASTERN INTERIOR-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 40 60
TEMP (24H TREND) 90 (+2) 72 (-4) 90
RH % (24H TREND) 61 (-1) 98 (+4) 60
WIND 20FT/EARLY(MPH) E 8 E 8 SE 9
WIND 20FT/LATE(MPH) E 11 SE 8 SE 10
MIXING HGT(FT-AGL/MSL)5930 5630
TRANSPORT WND (MPH) E 8 SE 9
VENT RATE (KT-FT) 41510 45040
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-192000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 60 60
TEMP (24H TREND) 86 (+4) 70 (-4) 86
RH % (24H TREND) 64 (-8) 99 (+2) 64
WIND 20FT/EARLY(MPH) E 6 E 6 SE 9
WIND 20FT/LATE(MPH) E 9 E 5 SE 9
MIXING HGT(FT-AGL/MSL)4620 4550
TRANSPORT WND (MPH) E 9 SE 9
VENT RATE (KT-FT) 36960 36400
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-192000-
CENTRAL MOUNTAIN RANGE-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 90 60 90
TEMP (24H TREND) 87 (+3) 68 (-4) 87
RH % (24H TREND) 67 (+1) 100 (+4) 65
WIND 20FT/EARLY(MPH) E 6 E 6 SE 8
WIND 20FT/LATE(MPH) SE 6 SE 5 SE 8
MIXING HGT(FT-AGL/MSL)6220 5610
TRANSPORT WND (MPH) E 7 SE 8
VENT RATE (KT-FT) 37320 39270
DISPERSION 5 5
DSI 5 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-192000-
CAYEY MOUNTAIN RANGE-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 50
TEMP (24H TREND) 86 (+3) 71 (-3) 85
RH % (24H TREND) 66 (-3) 99 (+2) 66
WIND 20FT/EARLY(MPH) E 8 E 6 E 9
WIND 20FT/LATE(MPH) E 10 E 6 SE 9
MIXING HGT(FT-AGL/MSL)5090 4990
TRANSPORT WND (MPH) E 9 SE 9
VENT RATE (KT-FT) 40720 39920
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-192000-
VIEQUES-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 50 40
TEMP (24H TREND) 90 (0) 78 (-2) 90
RH % (24H TREND) 57 (-3) 84 (0) 55
WIND 20FT/EARLY(MPH) E 9 E 10 E 9
WIND 20FT/LATE(MPH) E 8 E 10 SE 8
MIXING HGT(FT-AGL/MSL)3040 3210
TRANSPORT WND (MPH) E 9 SE 9
VENT RATE (KT-FT) 24320 25680
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-192000-
CULEBRA-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 50 40
TEMP (24H TREND) 91 (+2) 79 (-2) 91
RH % (24H TREND) 58 (-7) 85 (+1) 58
WIND 20FT/EARLY(MPH) E 9 E 10 E 10
WIND 20FT/LATE(MPH) E 8 E 10 SE 9
MIXING HGT(FT-AGL/MSL)3190 3200
TRANSPORT WND (MPH) E 10 SE 10
VENT RATE (KT-FT) 28710 28800
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-192000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 40
TEMP (24H TREND) 92 (+1) 75 (-2) 92
RH % (24H TREND) 57 (+1) 94 (+6) 57
WIND 20FT/EARLY(MPH) E 13 E 9 E 16
WIND 20FT/LATE(MPH) SE 14 E 11 SE 16
MIXING HGT(FT-AGL/MSL)4960 4540
TRANSPORT WND (MPH) E 12 SE 15
VENT RATE (KT-FT) 49600 59020
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-192000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 40 40
TEMP (24H TREND) 88 (0) 77 (-3) 88
RH % (24H TREND) 61 (-4) 85 (+1) 60
WIND 20FT/EARLY(MPH) E 10 E 10 E 10
WIND 20FT/LATE(MPH) E 9 E 9 SE 9
MIXING HGT(FT-AGL/MSL)3060 3220
TRANSPORT WND (MPH) E 10 SE 9
VENT RATE (KT-FT) 27540 25760
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-192000-
ST CROIX-
330 AM AST SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 50 50
TEMP (24H TREND) 89 (-1) 78 (-2) 90
RH % (24H TREND) 61 (-1) 88 (+1) 61
WIND 20FT/EARLY(MPH) E 9 E 10 E 9
WIND 20FT/LATE(MPH) E 9 E 9 SE 9
MIXING HGT(FT-AGL/MSL)4660 4690
TRANSPORT WND (MPH) E 10 SE 9
VENT RATE (KT-FT) 41940 37520
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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