Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
180
FNCA52 TJSJ 260847
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
447 AM AST Fri Sep 26 2025
.DISCUSSION...
Cloudiness along the coastal areas today during morning hours will
kept the RH values in the mid to upper 70s. Winds will become more
lighter today due to the surface pattern just north of the region.
Soils conditions are improving due to previous rains, as a result
and given the actual conditions the fire danger risk will remain
low today.
PRZ014-270900-
Southeast Coastal Plains-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Clear
Precip Type Tstms Showers None
Chance Precip (%) 60 40 0
Temp (24h trend) 90 (+6) 74 (-1) 89
RH % (24h trend) 58 (-10) 90 (-4) 53
Wind 20ft/early(mph) SE 10 E 8 S 10
Wind 20ft/late(mph) SE 10 E 8 S 10
Mixing Hgt(ft-agl/msl)4290 4580
Transport Wnd (mph) SE 8 SE 9
Vent Rate (kt-ft) 30030 36640
Dispersion 5 5
DSI 6 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ015-270900-
Southern Hills-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Mclear
Precip Type Tstms Showers Showers
Chance Precip (%) 40 40 0
Temp (24h trend) 85 (+6) 70 (-3) 86
RH % (24h trend) 70 (-14) 98 (+2) 66
Wind 20ft/early(mph) SE 9 E 5 S 9
Wind 20ft/late(mph) SE 9 E 5 S 9
Mixing Hgt(ft-agl/msl)4810 5080
Transport Wnd (mph) SE 9 SE 9
Vent Rate (kt-ft) 38480 40640
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-270900-
North Coastal Plains-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 80 40 60
Temp (24h trend) 91 (+6) 74 (-1) 91
RH % (24h trend) 65 (-15) 95 (-2) 63
Wind 20ft/early(mph) E 10 SE 5 NE 11
Wind 20ft/late(mph) E 10 SE 5 NE 11
Mixing Hgt(ft-agl/msl)4130 4520
Transport Wnd (mph) SE 5 SE 6
Vent Rate (kt-ft) 16520 22600
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ017-270900-
Northern Hills-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 90 30 80
Temp (24h trend) 87 (+5) 72 (-1) 90
RH % (24h trend) 71 (-11) 95 (-3) 65
Wind 20ft/early(mph) E 6 SE 5 NE 8
Wind 20ft/late(mph) E 6 SE 5 NE 8
Mixing Hgt(ft-agl/msl)4100 5070
Transport Wnd (mph) SE 5 SE 6
Vent Rate (kt-ft) 16400 25350
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ018-270900-
West Coast-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Mclear
Precip Type Tstms Showers Showers
Chance Precip (%) 60 40 10
Temp (24h trend) 89 (+4) 74 (0) 91
RH % (24h trend) 68 (-9) 98 (+1) 62
Wind 20ft/early(mph) SE 12 E 8 S 12
Wind 20ft/late(mph) SE 12 E 8 S 12
Mixing Hgt(ft-agl/msl)4640 4350
Transport Wnd (mph) SE 12 SE 14
Vent Rate (kt-ft) 46400 52200
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-270900-
Eastern Interior-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 40 20
Temp (24h trend) 88 (+6) 71 (-2) 88
RH % (24h trend) 67 (-17) 100 (+1) 64
Wind 20ft/early(mph) SE 9 Lgt/Var S 10
Wind 20ft/late(mph) SE 9 Lgt/Var S 10
Mixing Hgt(ft-agl/msl)5270 5680
Transport Wnd (mph) SE 7 S 9
Vent Rate (kt-ft) 31620 45440
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-270900-
Luquillo Mountain Range-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Tstms Showers
Chance Precip (%) 60 40 20
Temp (24h trend) 84 (+6) 67 (-3) 85
RH % (24h trend) 74 (-17) 100 (0) 69
Wind 20ft/early(mph) SE 8 Lgt/Var S 9
Wind 20ft/late(mph) SE 8 Lgt/Var S 9
Mixing Hgt(ft-agl/msl)4530 4520
Transport Wnd (mph) SE 8 S 8
Vent Rate (kt-ft) 31710 31640
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ023-270900-
Central Mountain Range-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 40 40
Temp (24h trend) 83 (+6) 69 (-2) 86
RH % (24h trend) 73 (-11) 97 (-1) 66
Wind 20ft/early(mph) SE 8 SE 5 S 10
Wind 20ft/late(mph) SE 8 SE 5 S 10
Mixing Hgt(ft-agl/msl)5200 5970
Transport Wnd (mph) SE 8 SE 8
Vent Rate (kt-ft) 36400 41790
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-270900-
Cayey Mountain Range-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Mclear
Precip Type Tstms Showers Showers
Chance Precip (%) 60 40 10
Temp (24h trend) 83 (+5) 69 (-2) 83
RH % (24h trend) 74 (-15) 100 (0) 70
Wind 20ft/early(mph) SE 6 Lgt/Var S 9
Wind 20ft/late(mph) SE 6 Lgt/Var S 9
Mixing Hgt(ft-agl/msl)4850 4960
Transport Wnd (mph) SE 7 S 9
Vent Rate (kt-ft) 29100 39680
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ025-270900-
Vieques-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Tstms Showers
Chance Precip (%) 60 50 30
Temp (24h trend) 89 (+2) 72 (-2) 89
RH % (24h trend) 63 (-10) 100 (0) 61
Wind 20ft/early(mph) SE 5 Lgt/Var S 9
Wind 20ft/late(mph) SE 5 Lgt/Var S 9
Mixing Hgt(ft-agl/msl)2900 3440
Transport Wnd (mph) SE 7 S 9
Vent Rate (kt-ft) 17400 27520
Dispersion 5 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-270900-
Culebra-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Tstms Showers
Chance Precip (%) 60 50 40
Temp (24h trend) 89 (+2) 73 (-2) 90
RH % (24h trend) 64 (-11) 100 (+1) 61
Wind 20ft/early(mph) SE 5 Lgt/Var S 10
Wind 20ft/late(mph) SE 5 Lgt/Var S 10
Mixing Hgt(ft-agl/msl)2790 3260
Transport Wnd (mph) SE 6 SE 8
Vent Rate (kt-ft) 13950 22820
Dispersion 4 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-270900-
Southwest Coastal Plains and Mona Island-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Clear
Precip Type Tstms Tstms None
Chance Precip (%) 40 50 0
Temp (24h trend) 90 (+5) 75 (-1) 92
RH % (24h trend) 58 (-9) 92 (-3) 51
Wind 20ft/early(mph) SE 14 G20 E 11 SE 14 G19
Wind 20ft/late(mph) SE 14 G20 E 11 SE 14 G19
Mixing Hgt(ft-agl/msl)4730 4460
Transport Wnd (mph) SE 13 SE 14
Vent Rate (kt-ft) 52030 53520
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
VIZ001-270900-
Saint Thomas and Saint John-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 60 60 50
Temp (24h trend) 85 (+1) 73 (-3) 86
RH % (24h trend) 72 (-4) 100 (+3) 70
Wind 20ft/early(mph) Lgt/Var E 5 S 8
Wind 20ft/late(mph) Lgt/Var E 5 S 8
Mixing Hgt(ft-agl/msl)2710 3370
Transport Wnd (mph) SE 5 S 10
Vent Rate (kt-ft) 10840 30330
Dispersion 4 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-270900-
St Croix-
447 AM AST Fri Sep 26 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Showers
Chance Precip (%) 60 50 50
Temp (24h trend) 89 (+2) 74 (-4) 90
RH % (24h trend) 67 (-9) 100 (+4) 62
Wind 20ft/early(mph) SE 6 SE 5 S 9
Wind 20ft/late(mph) SE 6 SE 5 S 9
Mixing Hgt(ft-agl/msl)3810 4470
Transport Wnd (mph) SE 7 S 9
Vent Rate (kt-ft) 22860 35760
Dispersion 5 5
DSI 6 2 5
RH Recovery Excellent
Remarks...None.
$$
$$