Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
135
FNCA52 TJSJ 301930
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
330 PM AST Wed Sep 30 2026
.DISCUSSION...
No fire danger is expected today.
PRZ014-010800-
Southeast Coastal Plains-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Pcldy Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers Showers
Chance Precip (%) 20 30 20 40
Temp (24h trend) 74 (-2) 92 (0) 74 92
RH % (24h trend) 91 (+2) 51 (+1) 90 47
Wind 20ft/early(mph) E 14 E 18 E 12 E 17
Wind 20ft/late(mph) NE 10 E 17 NE 10 E 18
Mixing Hgt(ft-agl/msl) 5280 5420
Transport Wnd (mph) E 15 E 15
Vent Rate (kt-ft) 68640 70460
Dispersion 5 5
DSI 4 6 4 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ015-010800-
Southern Hills-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Pcldy Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers Tstms
Chance Precip (%) 20 50 20 50
Temp (24h trend) 70 (-3) 89 (+2) 71 89
RH % (24h trend) 99 (+4) 60 (-3) 98 60
Wind 20ft/early(mph) E 12 E 13 E 11 E 12
Wind 20ft/late(mph) E 11 E 13 E 11 SE 13
Mixing Hgt(ft-agl/msl) 5820 5930
Transport Wnd (mph) E 15 E 14
Vent Rate (kt-ft) 75660 71160
Dispersion 5 5
DSI 3 6 3 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ016-010800-
North Coastal Plains-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Pcldy Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers Tstms
Chance Precip (%) 20 50 30 60
Temp (24h trend) 74 (-2) 92 (+1) 74 93
RH % (24h trend) 98 (+4) 59 (-5) 96 59
Wind 20ft/early(mph) E 18 E 13 E 16 E 13
Wind 20ft/late(mph) E 12 E 19 SE 9 E 18
Mixing Hgt(ft-agl/msl) 5120 5440
Transport Wnd (mph) E 16 E 15
Vent Rate (kt-ft) 71680 70720
Dispersion 5 5
DSI 5 6 5 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ017-010800-
Northern Hills-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Mclear Pcldy Mclear Pcldy
Precip Type Showers Tstms Tstms Tstms
Chance Precip (%) 10 60 30 70
Temp (24h trend) 71 (-2) 91 (+2) 71 91
RH % (24h trend) 99 (+1) 60 (-4) 97 61
Wind 20ft/early(mph) E 17 E 12 E 12 E 11
Wind 20ft/late(mph) E 10 E 16 E 6 E 14
Mixing Hgt(ft-agl/msl) 5870 5740
Transport Wnd (mph) E 13 E 12
Vent Rate (kt-ft) 64570 57400
Dispersion 5 5
DSI 4 6 2 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ018-010800-
West Coast-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Mclear Pcldy Mclear Pcldy
Precip Type None Tstms Showers Tstms
Chance Precip (%) 0 60 20 70
Temp (24h trend) 73 (-1) 93 (+1) 74 93
RH % (24h trend) 97 (0) 61 (-2) 95 59
Wind 20ft/early(mph) E 16 E 13 E 10 E 13
Wind 20ft/late(mph) E 12 E 14 E 9 E 14
Mixing Hgt(ft-agl/msl) 5070 4690
Transport Wnd (mph) E 10 E 10
Vent Rate (kt-ft) 45630 42210
Dispersion 5 5
DSI 4 6 3 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ019-010800-
Eastern Interior-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Pcldy Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers Tstms
Chance Precip (%) 40 50 40 60
Temp (24h trend) 72 (-3) 90 (+1) 72 91
RH % (24h trend) 99 (+4) 59 (-4) 97 59
Wind 20ft/early(mph) E 14 E 12 E 11 E 12
Wind 20ft/late(mph) E 13 E 12 E 11 E 12
Mixing Hgt(ft-agl/msl) 6300 6620
Transport Wnd (mph) E 14 E 14
Vent Rate (kt-ft) 75600 79440
Dispersion 5 5
DSI 4 6 4 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ022-010800-
Luquillo Mountain Range-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Mcldy Pcldy Pcldy Mcldy
Precip Type Showers Showers Showers Tstms
Chance Precip (%) 60 50 50 60
Temp (24h trend) 70 (-3) 87 (+4) 70 86
RH % (24h trend) 100 (+3) 63 (-6) 100 62
Wind 20ft/early(mph) E 11 E 11 E 9 E 11
Wind 20ft/late(mph) E 10 E 11 E 8 E 11
Mixing Hgt(ft-agl/msl) 3910 4520
Transport Wnd (mph) E 15 E 14
Vent Rate (kt-ft) 50830 54240
Dispersion 5 5
DSI 5 6 5 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ023-010800-
Central Mountain Range-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Mclear Pcldy Mclear Pcldy
Precip Type Showers Tstms Tstms Tstms
Chance Precip (%) 0 70 30 70
Temp (24h trend) 68 (-3) 88 (+4) 68 88
RH % (24h trend) 99 (+2) 63 (-6) 97 64
Wind 20ft/early(mph) E 13 E 10 E 6 E 9
Wind 20ft/late(mph) E 9 E 10 E 5 E 10
Mixing Hgt(ft-agl/msl) 6710 6260
Transport Wnd (mph) E 10 E 10
Vent Rate (kt-ft) 60390 56340
Dispersion 5 5
DSI 2 6 2 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ024-010800-
Cayey Mountain Range-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Pcldy Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers Tstms
Chance Precip (%) 50 50 50 50
Temp (24h trend) 69 (-3) 86 (+1) 70 86
RH % (24h trend) 100 (+2) 63 (-3) 100 62
Wind 20ft/early(mph) E 11 E 10 E 9 E 11
Wind 20ft/late(mph) E 9 E 11 E 9 E 11
Mixing Hgt(ft-agl/msl) 5190 5550
Transport Wnd (mph) E 14 E 14
Vent Rate (kt-ft) 62280 66600
Dispersion 5 5
DSI 4 6 4 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ025-010800-
Vieques-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Mcldy Pcldy Mcldy Mcldy
Precip Type Showers Showers Showers Tstms
Chance Precip (%) 60 60 50 60
Temp (24h trend) 77 (-2) 90 (0) 77 91
RH % (24h trend) 89 (+3) 58 (-3) 88 58
Wind 20ft/early(mph) E 18 E 14 E 14 E 13
Wind 20ft/late(mph) E 17 E 14 E 14 E 13
Mixing Hgt(ft-agl/msl) 3480 3610
Transport Wnd (mph) E 18 E 15
Vent Rate (kt-ft) 55680 46930
Dispersion 5 5
DSI 6 6 6 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ026-010800-
Culebra-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Pcldy Pcldy Pcldy Mcldy
Precip Type Showers Showers Showers Tstms
Chance Precip (%) 50 50 40 50
Temp (24h trend) 79 (-2) 90 (0) 79 91
RH % (24h trend) 89 (+4) 61 (-3) 89 59
Wind 20ft/early(mph) E 18 E 14 E 14 E 13
Wind 20ft/late(mph) E 17 E 14 E 13 E 14
Mixing Hgt(ft-agl/msl) 3590 3430
Transport Wnd (mph) E 20 E 15
Vent Rate (kt-ft) 61030 44590
Dispersion 5 5
DSI 6 6 6 6
RH Recovery Excellent Excellent
Remarks...None.
$$
PRZ027-010800-
Southwest Coastal Plains and Mona Island-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Mclear Mclear Mclear Pcldy
Precip Type Showers Showers Showers Showers
Chance Precip (%) 10 20 10 40
Temp (24h trend) 74 (-2) 93 (+1) 75 93
RH % (24h trend) 89 (0) 50 (-1) 88 46
Wind 20ft/early(mph) E 17 E 19 E 14 E 18
Wind 20ft/late(mph) E 12 E 20 E 13 SE 19
Mixing Hgt(ft-agl/msl) 5340 4920
Transport Wnd (mph) E 16 E 16
Vent Rate (kt-ft) 74760 68880
Dispersion 5 5
DSI 4 6 4 6
RH Recovery Excellent Excellent
Remarks...None.
$$
VIZ001-010800-
Saint Thomas and Saint John-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Pcldy Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers Showers
Chance Precip (%) 30 40 30 40
Temp (24h trend) 77 (-3) 89 (+2) 77 89
RH % (24h trend) 91 (+5) 63 (-5) 89 62
Wind 20ft/early(mph) E 18 E 14 E 16 E 14
Wind 20ft/late(mph) E 17 E 14 E 16 E 13
Mixing Hgt(ft-agl/msl) 3620 3450
Transport Wnd (mph) E 20 E 16
Vent Rate (kt-ft) 61540 48300
Dispersion 5 5
DSI 6 6 6 6
RH Recovery Excellent Excellent
Remarks...None.
$$
VIZ002-010800-
St Croix-
330 PM AST Wed Sep 30 2026
Tonight Thu Thu Night Fri
Cloud Cover Pcldy Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers Showers
Chance Precip (%) 50 40 40 40
Temp (24h trend) 77 (-2) 91 (+2) 78 91
RH % (24h trend) 93 (+5) 62 (-4) 89 61
Wind 20ft/early(mph) E 17 E 14 E 14 E 13
Wind 20ft/late(mph) E 17 E 14 E 14 E 13
Mixing Hgt(ft-agl/msl) 4710 4690
Transport Wnd (mph) E 17 E 14
Vent Rate (kt-ft) 70650 56280
Dispersion 5 5
DSI 6 6 6 6
RH Recovery Excellent Excellent
Remarks...None.
$$