900
FNCA52 TJSJ 041930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST SUN OCT 4 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-050800-
SOUTHEAST COASTAL PLAINS-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 50 20
TEMP (24H TREND) 73 (-2) 92 (+2) 73 92
RH % (24H TREND) 96 (+7) 57 (-4) 96 55
WIND 20FT/EARLY(MPH) E 10 E 14 E 11 E 12
WIND 20FT/LATE(MPH) NE 6 SE 14 NE 8 E 13
MIXING HGT(FT-AGL/MSL) 5070 5020
TRANSPORT WND (MPH) E 13 E 10
VENT RATE (KT-FT) 55770 45180
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-050800-
SOUTHERN HILLS-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 40 50 30 50
TEMP (24H TREND) 69 (-4) 90 (+4) 69 90
RH % (24H TREND) 100 (+7) 59 (-5) 99 58
WIND 20FT/EARLY(MPH) E 8 E 11 E 8 E 9
WIND 20FT/LATE(MPH) E 6 SE 11 E 8 E 10
MIXING HGT(FT-AGL/MSL) 5700 5730
TRANSPORT WND (MPH) E 12 E 9
VENT RATE (KT-FT) 57000 45840
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-050800-
NORTH COASTAL PLAINS-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 60 50 40
TEMP (24H TREND) 72 (-4) 92 (+2) 72 92
RH % (24H TREND) 99 (+6) 60 (-5) 99 59
WIND 20FT/EARLY(MPH) SE 11 E 11 SE 11 E 9
WIND 20FT/LATE(MPH) SE 6 E 16 SE 8 E 13
MIXING HGT(FT-AGL/MSL) 5200 5140
TRANSPORT WND (MPH) E 12 E 9
VENT RATE (KT-FT) 52000 41120
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-050800-
NORTHERN HILLS-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 90 60 70
TEMP (24H TREND) 70 (-3) 91 (+3) 70 91
RH % (24H TREND) 100 (+4) 62 (-3) 100 61
WIND 20FT/EARLY(MPH) SE 9 E 9 SE 10 E 8
WIND 20FT/LATE(MPH) LGT/VAR E 13 LGT/VAR NE 11
MIXING HGT(FT-AGL/MSL) 5460 5730
TRANSPORT WND (MPH) E 8 SE 7
VENT RATE (KT-FT) 38220 34380
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-050800-
WEST COAST-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 70 50 70
TEMP (24H TREND) 72 (-2) 94 (+3) 72 94
RH % (24H TREND) 99 (+5) 58 (-5) 100 58
WIND 20FT/EARLY(MPH) E 8 E 10 E 9 E 9
WIND 20FT/LATE(MPH) E 9 E 11 E 9 E 10
MIXING HGT(FT-AGL/MSL) 4330 4800
TRANSPORT WND (MPH) SE 8 SE 7
VENT RATE (KT-FT) 30310 28800
DISPERSION 5 5
DSI 3 5 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-050800-
EASTERN INTERIOR-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 40 50 50 40
TEMP (24H TREND) 71 (-4) 91 (+3) 71 91
RH % (24H TREND) 100 (+7) 59 (-3) 100 58
WIND 20FT/EARLY(MPH) SE 10 SE 10 SE 11 E 9
WIND 20FT/LATE(MPH) SE 9 SE 12 E 9 E 11
MIXING HGT(FT-AGL/MSL) 6610 6400
TRANSPORT WND (MPH) SE 12 E 9
VENT RATE (KT-FT) 66100 51200
DISPERSION 5 5
DSI 2 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-050800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLDY MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 60 60 50 40
TEMP (24H TREND) 68 (-4) 87 (+4) 69 86
RH % (24H TREND) 100 (+3) 63 (-3) 100 61
WIND 20FT/EARLY(MPH) E 8 SE 9 E 9 E 8
WIND 20FT/LATE(MPH) SE 6 SE 11 E 8 E 9
MIXING HGT(FT-AGL/MSL) 4440 4590
TRANSPORT WND (MPH) E 13 E 9
VENT RATE (KT-FT) 48840 36720
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-050800-
CENTRAL MOUNTAIN RANGE-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 90 60 70
TEMP (24H TREND) 67 (-4) 89 (+6) 67 89
RH % (24H TREND) 100 (+5) 62 (-7) 100 62
WIND 20FT/EARLY(MPH) SE 5 SE 8 SE 5 E 6
WIND 20FT/LATE(MPH) SE 5 SE 8 LGT/VAR E 6
MIXING HGT(FT-AGL/MSL) 6350 6200
TRANSPORT WND (MPH) SE 8 E 7
VENT RATE (KT-FT) 44450 37200
DISPERSION 5 5
DSI 1 5 1 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-050800-
CAYEY MOUNTAIN RANGE-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 40 40 60 30
TEMP (24H TREND) 68 (-4) 87 (+3) 68 87
RH % (24H TREND) 100 (+4) 61 (-2) 100 59
WIND 20FT/EARLY(MPH) E 6 E 9 E 6 E 8
WIND 20FT/LATE(MPH) E 5 SE 10 E 6 E 9
MIXING HGT(FT-AGL/MSL) 5500 5490
TRANSPORT WND (MPH) E 13 E 9
VENT RATE (KT-FT) 60500 43920
DISPERSION 5 5
DSI 2 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-050800-
VIEQUES-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 40 40
TEMP (24H TREND) 76 (-1) 91 (+2) 75 90
RH % (24H TREND) 92 (+4) 58 (-1) 94 58
WIND 20FT/EARLY(MPH) E 12 E 11 E 12 E 11
WIND 20FT/LATE(MPH) E 11 E 11 E 12 E 10
MIXING HGT(FT-AGL/MSL) 3210 3510
TRANSPORT WND (MPH) E 13 E 12
VENT RATE (KT-FT) 35310 35100
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-050800-
CULEBRA-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 40 40
TEMP (24H TREND) 77 (-2) 92 (+3) 77 91
RH % (24H TREND) 91 (+5) 56 (-5) 93 59
WIND 20FT/EARLY(MPH) E 12 E 11 E 12 E 11
WIND 20FT/LATE(MPH) E 11 E 11 E 12 E 10
MIXING HGT(FT-AGL/MSL) 3240 3370
TRANSPORT WND (MPH) E 13 E 12
VENT RATE (KT-FT) 35640 33700
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-050800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 20 30
TEMP (24H TREND) 74 (-2) 94 (+3) 74 94
RH % (24H TREND) 94 (+7) 53 (-4) 94 53
WIND 20FT/EARLY(MPH) E 10 E 13 E 13 E 13
WIND 20FT/LATE(MPH) E 11 SE 16 E 11 SE 13
MIXING HGT(FT-AGL/MSL) 4700 4930
TRANSPORT WND (MPH) E 14 E 12
VENT RATE (KT-FT) 56400 49300
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-050800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 30 30
TEMP (24H TREND) 76 (-2) 89 (+2) 76 89
RH % (24H TREND) 92 (+5) 63 (-2) 92 62
WIND 20FT/EARLY(MPH) E 13 E 12 E 12 E 12
WIND 20FT/LATE(MPH) E 12 E 12 E 12 E 11
MIXING HGT(FT-AGL/MSL) 3250 3510
TRANSPORT WND (MPH) E 15 E 13
VENT RATE (KT-FT) 42250 38610
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-050800-
ST CROIX-
330 PM AST SUN OCT 4 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 30 30
TEMP (24H TREND) 75 (-2) 91 (+2) 74 91
RH % (24H TREND) 99 (+9) 62 (-3) 100 63
WIND 20FT/EARLY(MPH) E 11 E 11 E 13 E 12
WIND 20FT/LATE(MPH) E 11 E 12 E 12 E 10
MIXING HGT(FT-AGL/MSL) 4520 4880
TRANSPORT WND (MPH) E 15 E 13
VENT RATE (KT-FT) 58760 53680
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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