Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
676
FNCA52 TJSJ 121930
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
330 PM AST Sat Sep 12 2026
.DISCUSSION...
No fire danger is expected today.
PRZ014-130800-
Southeast Coastal Plains-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Mclear Mclear Mclear Mclear
Precip Type Showers Showers Showers Showers
Chance Precip (%) 0 10 10 20
Temp (24h trend) 76 (-2) 93 (+1) 75 92
RH % (24h trend) 86 (+1) 44 (-11) 87 48
Wind 20ft/early(mph) NE 12 E 13 G21 E 12 E 14 G23
Wind 20ft/late(mph) NE 9 E 16 G24 NE 9 E 16 G24
Mixing Hgt(ft-agl/msl) 6000 5250
Transport Wnd (mph) E 17 E 16
Vent Rate (kt-ft) 90000 73500
Dispersion 5 5
DSI 4 6 3 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ015-130800-
Southern Hills-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Mclear Mclear Mclear Pcldy
Precip Type Showers Showers Showers Tstms
Chance Precip (%) 10 30 10 40
Temp (24h trend) 72 (-3) 90 (+2) 71 89
RH % (24h trend) 95 (+4) 56 (-3) 96 58
Wind 20ft/early(mph) NE 12 E 12 E 11 E 12
Wind 20ft/late(mph) NE 12 E 14 NE 11 E 13
Mixing Hgt(ft-agl/msl) 6310 5700
Transport Wnd (mph) E 16 E 14
Vent Rate (kt-ft) 88340 68400
Dispersion 5 5
DSI 3 6 3 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ016-130800-
North Coastal Plains-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Mclear Mclear Mclear Mclear
Precip Type Showers Showers Showers Showers
Chance Precip (%) 30 30 10 30
Temp (24h trend) 76 (-2) 92 (+1) 75 91
RH % (24h trend) 94 (+3) 59 (-4) 96 61
Wind 20ft/early(mph) E 16 E 13 E 17 E 13
Wind 20ft/late(mph) E 13 E 20 E 10 E 16
Mixing Hgt(ft-agl/msl) 5240 5120
Transport Wnd (mph) E 17 E 16
Vent Rate (kt-ft) 78600 71680
Dispersion 5 5
DSI 6 6 5 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ017-130800-
Northern Hills-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Mclear Mclear Mclear Pcldy
Precip Type Showers Showers Showers Tstms
Chance Precip (%) 10 30 10 50
Temp (24h trend) 73 (-2) 91 (+2) 72 90
RH % (24h trend) 96 (+1) 60 (-1) 97 62
Wind 20ft/early(mph) E 13 E 12 E 14 E 12
Wind 20ft/late(mph) E 12 NE 17 E 8 E 13
Mixing Hgt(ft-agl/msl) 5830 5390
Transport Wnd (mph) E 15 E 13
Vent Rate (kt-ft) 75790 59290
Dispersion 5 5
DSI 4 6 3 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ018-130800-
West Coast-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Mclear Mclear Mclear Pcldy
Precip Type Showers Tstms Showers Tstms
Chance Precip (%) 10 50 20 60
Temp (24h trend) 73 (-2) 94 (+2) 73 94
RH % (24h trend) 95 (-2) 57 (-4) 96 58
Wind 20ft/early(mph) NE 18 E 12 E 12 E 11
Wind 20ft/late(mph) E 17 E 14 E 9 E 12
Mixing Hgt(ft-agl/msl) 5640 4590
Transport Wnd (mph) E 12 E 10
Vent Rate (kt-ft) 56400 41310
Dispersion 5 5
DSI 3 6 3 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ019-130800-
Eastern Interior-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Pcldy Mclear Mclear Pcldy
Precip Type Showers Showers Showers Tstms
Chance Precip (%) 40 20 20 50
Temp (24h trend) 73 (-3) 90 (+1) 73 90
RH % (24h trend) 95 (+5) 59 (-1) 97 60
Wind 20ft/early(mph) E 12 E 12 E 12 E 13
Wind 20ft/late(mph) E 12 E 12 E 12 E 13
Mixing Hgt(ft-agl/msl) 6360 5790
Transport Wnd (mph) E 15 E 15
Vent Rate (kt-ft) 82680 75270
Dispersion 5 5
DSI 4 6 3 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ022-130800-
Luquillo Mountain Range-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Pcldy Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers Tstms
Chance Precip (%) 40 20 30 50
Temp (24h trend) 71 (-4) 86 (+3) 71 85
RH % (24h trend) 98 (+5) 65 (-3) 99 65
Wind 20ft/early(mph) E 11 E 11 E 10 E 12
Wind 20ft/late(mph) E 10 E 11 E 9 E 12
Mixing Hgt(ft-agl/msl) 4900 4510
Transport Wnd (mph) E 16 E 17
Vent Rate (kt-ft) 68600 67650
Dispersion 5 5
DSI 5 6 4 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ023-130800-
Central Mountain Range-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Mclear Pcldy Mclear Pcldy
Precip Type None Tstms Showers Tstms
Chance Precip (%) 0 50 20 70
Temp (24h trend) 69 (-3) 88 (+3) 69 87
RH % (24h trend) 97 (+1) 61 (-3) 98 64
Wind 20ft/early(mph) E 13 E 9 E 10 E 9
Wind 20ft/late(mph) E 11 E 11 E 6 E 9
Mixing Hgt(ft-agl/msl) 7230 6100
Transport Wnd (mph) E 13 E 10
Vent Rate (kt-ft) 79530 54900
Dispersion 5 5
DSI 2 6 2 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ024-130800-
Cayey Mountain Range-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Pcldy Mclear Mclear Mclear
Precip Type Showers Showers Showers Showers
Chance Precip (%) 30 20 20 40
Temp (24h trend) 72 (-2) 86 (+1) 71 86
RH % (24h trend) 98 (+4) 62 (-1) 99 64
Wind 20ft/early(mph) NE 11 E 12 E 10 E 11
Wind 20ft/late(mph) E 10 E 12 E 9 E 11
Mixing Hgt(ft-agl/msl) 5350 5160
Transport Wnd (mph) E 18 E 16
Vent Rate (kt-ft) 85600 72240
Dispersion 5 5
DSI 4 6 3 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ025-130800-
Vieques-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Pcldy Mclear Pcldy Pcldy
Precip Type Showers Showers Showers Showers
Chance Precip (%) 30 10 40 40
Temp (24h trend) 79 (-2) 90 (0) 79 90
RH % (24h trend) 85 (+5) 57 (-2) 86 58
Wind 20ft/early(mph) E 17 E 14 E 16 E 13
Wind 20ft/late(mph) E 17 E 14 E 14 E 13
Mixing Hgt(ft-agl/msl) 3750 3450
Transport Wnd (mph) E 20 E 14
Vent Rate (kt-ft) 63750 41400
Dispersion 5 5
DSI 6 6 6 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ026-130800-
Culebra-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Pcldy Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers Showers
Chance Precip (%) 30 20 40 40
Temp (24h trend) 80 (-2) 91 (+1) 79 91
RH % (24h trend) 88 (+7) 59 (-5) 90 60
Wind 20ft/early(mph) E 17 E 14 E 16 E 13
Wind 20ft/late(mph) E 17 E 14 E 14 E 13
Mixing Hgt(ft-agl/msl) 3670 3540
Transport Wnd (mph) E 20 E 17
Vent Rate (kt-ft) 62390 53100
Dispersion 5 5
DSI 6 6 6 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ027-130800-
Southwest Coastal Plains and Mona Island-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Mclear Mclear Mclear Mclear
Precip Type Showers Showers Showers Showers
Chance Precip (%) 10 30 20 30
Temp (24h trend) 75 (-2) 94 (+2) 75 94
RH % (24h trend) 89 (+1) 44 (-13) 85 48
Wind 20ft/early(mph) E 14 E 13 G22 E 13 E 14 G22
Wind 20ft/late(mph) E 12 E 18 G26 E 12 E 16 G23
Mixing Hgt(ft-agl/msl) 5810 5660
Transport Wnd (mph) E 15 E 15
Vent Rate (kt-ft) 75530 73580
Dispersion 5 5
DSI 3 6 4 6
RH Recovery Excellent Excellent
Remarks...None.
$$
VIZ001-130800-
Saint Thomas and Saint John-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Pcldy Mclear Pcldy Pcldy
Precip Type Showers Showers Showers Showers
Chance Precip (%) 30 20 30 40
Temp (24h trend) 79 (-2) 88 (+1) 77 88
RH % (24h trend) 90 (+8) 62 (-3) 91 62
Wind 20ft/early(mph) E 17 E 14 E 14 E 16
Wind 20ft/late(mph) E 17 E 14 E 14 E 14
Mixing Hgt(ft-agl/msl) 3930 3460
Transport Wnd (mph) E 18 E 17
Vent Rate (kt-ft) 62880 51900
Dispersion 5 5
DSI 6 6 6 6
RH Recovery Excellent Excellent
Remarks...None.
$$
VIZ002-130800-
St Croix-
330 PM AST Sat Sep 12 2026
Tonight Sun Sun Night Mon
Cloud Cover Pcldy Mclear Mclear Pcldy
Precip Type Showers Showers Showers Showers
Chance Precip (%) 30 10 30 40
Temp (24h trend) 79 (-2) 89 (+1) 78 89
RH % (24h trend) 90 (+6) 63 (-4) 90 63
Wind 20ft/early(mph) E 17 E 14 E 14 E 16
Wind 20ft/late(mph) E 16 E 14 E 14 E 16
Mixing Hgt(ft-agl/msl) 4950 4420
Transport Wnd (mph) E 21 E 18
Vent Rate (kt-ft) 89100 70720
Dispersion 5 5
DSI 6 6 6 6
RH Recovery Excellent Excellent
Remarks...None.
$$