Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
605
FNCA52 TJSJ 200730
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
330 AM AST Sun Sep 20 2026
.DISCUSSION...
No fire danger is expected today.
PRZ014-202000-
Southeast Coastal Plains-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 10 10
Temp (24h trend) 90 (0) 74 (-3) 90
RH % (24h trend) 59 (+1) 93 (+4) 59
Wind 20ft/early(mph) E 11 E 8 E 13
Wind 20ft/late(mph) SE 11 E 6 SE 13
Mixing Hgt(ft-agl/msl)4540 4700
Transport Wnd (mph) SE 10 E 12
Vent Rate (kt-ft) 40860 47000
Dispersion 5 5
DSI 6 2 6
RH Recovery Excellent
Remarks...None.
$$
PRZ015-202000-
Southern Hills-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 30 10 50
Temp (24h trend) 88 (+2) 71 (-3) 88
RH % (24h trend) 62 (-6) 98 (+5) 63
Wind 20ft/early(mph) E 10 E 5 E 10
Wind 20ft/late(mph) SE 10 E 5 SE 11
Mixing Hgt(ft-agl/msl)5360 5240
Transport Wnd (mph) SE 9 E 10
Vent Rate (kt-ft) 42880 47160
Dispersion 5 5
DSI 6 2 6
RH Recovery Excellent
Remarks...None.
$$
PRZ016-202000-
North Coastal Plains-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 60 50 70
Temp (24h trend) 91 (+1) 74 (-2) 91
RH % (24h trend) 60 (-6) 99 (+5) 61
Wind 20ft/early(mph) E 10 SE 9 SE 10
Wind 20ft/late(mph) E 12 SE 5 E 14
Mixing Hgt(ft-agl/msl)5000 5000
Transport Wnd (mph) SE 8 E 10
Vent Rate (kt-ft) 35000 45000
Dispersion 5 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-202000-
Northern Hills-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 90 70 90
Temp (24h trend) 89 (+1) 71 (-2) 90
RH % (24h trend) 63 (-4) 99 (+1) 63
Wind 20ft/early(mph) SE 8 SE 5 SE 8
Wind 20ft/late(mph) E 10 SE 5 E 11
Mixing Hgt(ft-agl/msl)5480 5150
Transport Wnd (mph) SE 7 SE 8
Vent Rate (kt-ft) 32880 36050
Dispersion 5 5
DSI 6 2 6
RH Recovery Excellent
Remarks...None.
$$
PRZ018-202000-
West Coast-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 40 50 60
Temp (24h trend) 91 (0) 73 (-2) 92
RH % (24h trend) 63 (-3) 99 (+3) 63
Wind 20ft/early(mph) SE 10 E 8 E 11
Wind 20ft/late(mph) E 12 E 8 E 14
Mixing Hgt(ft-agl/msl)5000 4790
Transport Wnd (mph) SE 9 SE 10
Vent Rate (kt-ft) 40000 43110
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ019-202000-
Eastern Interior-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 50 20 40
Temp (24h trend) 90 (+2) 72 (-4) 90
RH % (24h trend) 60 (-5) 98 (+5) 61
Wind 20ft/early(mph) SE 10 SE 8 SE 10
Wind 20ft/late(mph) SE 11 SE 8 SE 11
Mixing Hgt(ft-agl/msl)5700 5740
Transport Wnd (mph) SE 9 SE 10
Vent Rate (kt-ft) 45600 51660
Dispersion 5 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ022-202000-
Luquillo Mountain Range-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 50 50 50
Temp (24h trend) 86 (+3) 70 (-4) 86
RH % (24h trend) 63 (-8) 99 (+4) 64
Wind 20ft/early(mph) SE 9 SE 6 SE 9
Wind 20ft/late(mph) SE 9 SE 5 SE 10
Mixing Hgt(ft-agl/msl)4590 4680
Transport Wnd (mph) SE 9 SE 12
Vent Rate (kt-ft) 36720 46800
Dispersion 5 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-202000-
Central Mountain Range-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 60 50 90
Temp (24h trend) 86 (+3) 68 (-4) 87
RH % (24h trend) 67 (-6) 100 (+3) 68
Wind 20ft/early(mph) SE 8 SE 5 SE 8
Wind 20ft/late(mph) SE 8 SE 5 SE 9
Mixing Hgt(ft-agl/msl)5860 5490
Transport Wnd (mph) SE 8 SE 8
Vent Rate (kt-ft) 41020 38430
Dispersion 5 5
DSI 6 2 6
RH Recovery Excellent
Remarks...None.
$$
PRZ024-202000-
Cayey Mountain Range-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 20 30
Temp (24h trend) 85 (+1) 71 (-2) 85
RH % (24h trend) 65 (-5) 98 (+2) 65
Wind 20ft/early(mph) E 8 SE 5 SE 9
Wind 20ft/late(mph) SE 9 Lgt/Var SE 10
Mixing Hgt(ft-agl/msl)4920 5180
Transport Wnd (mph) SE 9 SE 10
Vent Rate (kt-ft) 39360 46620
Dispersion 5 5
DSI 6 2 6
RH Recovery Excellent
Remarks...None.
$$
PRZ025-202000-
Vieques-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Tstms Showers
Chance Precip (%) 40 60 40
Temp (24h trend) 90 (+1) 78 (-2) 90
RH % (24h trend) 56 (-4) 84 (+3) 57
Wind 20ft/early(mph) SE 10 SE 10 SE 10
Wind 20ft/late(mph) SE 8 SE 10 SE 10
Mixing Hgt(ft-agl/msl)3290 3210
Transport Wnd (mph) SE 12 SE 9
Vent Rate (kt-ft) 32900 25680
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-202000-
Culebra-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Tstms Showers
Chance Precip (%) 40 60 40
Temp (24h trend) 91 (+2) 79 (-2) 91
RH % (24h trend) 57 (-8) 85 (+5) 57
Wind 20ft/early(mph) SE 10 SE 10 SE 11
Wind 20ft/late(mph) SE 9 E 10 SE 10
Mixing Hgt(ft-agl/msl)3380 3290
Transport Wnd (mph) SE 12 SE 9
Vent Rate (kt-ft) 33800 26320
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-202000-
Southwest Coastal Plains and Mona Island-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Mclear Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 10 30
Temp (24h trend) 91 (+1) 75 (-2) 92
RH % (24h trend) 57 (0) 94 (+6) 58
Wind 20ft/early(mph) E 13 E 10 E 16
Wind 20ft/late(mph) SE 16 E 11 SE 18
Mixing Hgt(ft-agl/msl)4910 4940
Transport Wnd (mph) SE 13 SE 16
Vent Rate (kt-ft) 54010 69160
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
VIZ001-202000-
Saint Thomas and Saint John-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Showers
Chance Precip (%) 50 60 30
Temp (24h trend) 88 (+1) 77 (-3) 88
RH % (24h trend) 60 (-5) 85 (+5) 61
Wind 20ft/early(mph) SE 10 E 9 SE 10
Wind 20ft/late(mph) SE 9 E 9 SE 10
Mixing Hgt(ft-agl/msl)3380 3320
Transport Wnd (mph) SE 12 E 12
Vent Rate (kt-ft) 33800 33200
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-202000-
St Croix-
330 AM AST Sun Sep 20 2026
Today Tonight Mon
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Tstms Showers
Chance Precip (%) 40 60 40
Temp (24h trend) 89 (+1) 78 (-2) 90
RH % (24h trend) 61 (-4) 88 (+3) 62
Wind 20ft/early(mph) SE 9 SE 8 E 10
Wind 20ft/late(mph) SE 9 E 8 SE 10
Mixing Hgt(ft-agl/msl)4730 4920
Transport Wnd (mph) SE 10 SE 12
Vent Rate (kt-ft) 42570 49200
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$