Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
114
FNCA52 TJSJ 060735
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
335 AM AST Mon Oct 6 2025
.DISCUSSION...
Today, a tropical wave is expected to approach the islands,
enhancing the potential for shower and thunderstorm activity,
particularly over central and southern Puerto Rico. Winds will
prevail from the northeast at 10 to 15 mph across the area.
Relative humidity trend suggests values near to slightly above
thresholds over the southern coastal plains of Puerto Rico (near
55-60%). The expected afternoon convective activity will increase
the potential to observe urban and small stream flooding in low-
lying areas. At this time, the fire danger threat will remain low
today.
PRZ014-070745-
Southeast Coastal Plains-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 80 60 50
Temp (24h trend) 92 (+2) 73 (-2) 90
RH % (24h trend) 58 (-7) 95 (+2) 62
Wind 20ft/early(mph) E 13 G17 NE 9 SE 10
Wind 20ft/late(mph) E 13 G17 NE 9 SE 10
Mixing Hgt(ft-agl/msl)4660 3880
Transport Wnd (mph) E 9 E 7
Vent Rate (kt-ft) 37280 23280
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ015-070745-
Southern Hills-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 90 60 70
Temp (24h trend) 89 (+4) 70 (-3) 87
RH % (24h trend) 61 (-7) 99 (+5) 64
Wind 20ft/early(mph) E 10 NE 10 SE 8
Wind 20ft/late(mph) E 10 NE 10 SE 8
Mixing Hgt(ft-agl/msl)5070 4250
Transport Wnd (mph) E 8 E 7
Vent Rate (kt-ft) 35490 25500
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-070745-
North Coastal Plains-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 40 30 70
Temp (24h trend) 90 (0) 73 (-2) 90
RH % (24h trend) 64 (-4) 100 (+4) 64
Wind 20ft/early(mph) NE 11 E 11 E 10
Wind 20ft/late(mph) NE 11 E 11 E 10
Mixing Hgt(ft-agl/msl)4310 4190
Transport Wnd (mph) E 10 E 9
Vent Rate (kt-ft) 38790 33520
Dispersion 5 5
DSI 5 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-070745-
Northern Hills-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 60 30 80
Temp (24h trend) 88 (0) 71 (-2) 88
RH % (24h trend) 66 (-2) 100 (+3) 66
Wind 20ft/early(mph) NE 10 E 10 E 9
Wind 20ft/late(mph) NE 10 E 10 E 9
Mixing Hgt(ft-agl/msl)4700 4050
Transport Wnd (mph) E 8 E 8
Vent Rate (kt-ft) 32900 28350
Dispersion 5 5
DSI 5 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ018-070745-
West Coast-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 80 60 80
Temp (24h trend) 91 (0) 72 (-2) 91
RH % (24h trend) 63 (-2) 98 (+5) 64
Wind 20ft/early(mph) N 11 NE 14 SE 8
Wind 20ft/late(mph) N 11 NE 14 SE 8
Mixing Hgt(ft-agl/msl)4360 4020
Transport Wnd (mph) NE 3 E 5
Vent Rate (kt-ft) 13080 16080
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-070745-
Eastern Interior-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 70 40 50
Temp (24h trend) 89 (+1) 72 (-2) 89
RH % (24h trend) 62 (-5) 100 (+2) 66
Wind 20ft/early(mph) NE 10 NE 10 E 6
Wind 20ft/late(mph) NE 10 NE 10 E 6
Mixing Hgt(ft-agl/msl)5190 4640
Transport Wnd (mph) E 9 E 8
Vent Rate (kt-ft) 41520 32480
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-070745-
Luquillo Mountain Range-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 50 50 60
Temp (24h trend) 86 (+4) 69 (-3) 85
RH % (24h trend) 66 (-8) 100 (0) 68
Wind 20ft/early(mph) NE 8 NE 6 SE 6
Wind 20ft/late(mph) NE 8 NE 6 SE 6
Mixing Hgt(ft-agl/msl)4250 4350
Transport Wnd (mph) E 10 E 8
Vent Rate (kt-ft) 38250 30450
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ023-070745-
Central Mountain Range-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 90 50 80
Temp (24h trend) 87 (+4) 68 (-3) 86
RH % (24h trend) 66 (-5) 99 (+3) 68
Wind 20ft/early(mph) NE 8 NE 10 E 5
Wind 20ft/late(mph) NE 8 NE 10 E 5
Mixing Hgt(ft-agl/msl)5260 4300
Transport Wnd (mph) E 6 E 6
Vent Rate (kt-ft) 26300 21500
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-070745-
Cayey Mountain Range-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 60 40 40
Temp (24h trend) 86 (+3) 69 (-2) 85
RH % (24h trend) 65 (-5) 100 (0) 69
Wind 20ft/early(mph) NE 9 NE 8 SE 6
Wind 20ft/late(mph) NE 9 NE 8 SE 6
Mixing Hgt(ft-agl/msl)5080 4660
Transport Wnd (mph) E 10 E 9
Vent Rate (kt-ft) 45720 37280
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ025-070745-
Vieques-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Pcldy Mcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 50 60 60
Temp (24h trend) 90 (+1) 76 (-1) 90
RH % (24h trend) 59 (-3) 98 (+4) 61
Wind 20ft/early(mph) NE 10 NE 12 SE 6
Wind 20ft/late(mph) NE 10 NE 12 SE 6
Mixing Hgt(ft-agl/msl)3410 3290
Transport Wnd (mph) E 14 SE 8
Vent Rate (kt-ft) 40920 23030
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-070745-
Culebra-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Pcldy Mcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 70 60 60
Temp (24h trend) 92 (+2) 77 (-1) 92
RH % (24h trend) 56 (-9) 97 (+3) 59
Wind 20ft/early(mph) NE 11 NE 13 G17 SE 8
Wind 20ft/late(mph) NE 11 NE 13 G17 SE 8
Mixing Hgt(ft-agl/msl)3380 3190
Transport Wnd (mph) E 15 SE 9
Vent Rate (kt-ft) 43940 25520
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-070745-
Southwest Coastal Plains and Mona Island-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 80 60 50
Temp (24h trend) 93 (+2) 74 (-2) 92
RH % (24h trend) 57 (-4) 92 (+5) 59
Wind 20ft/early(mph) E 11 NE 14 G17 E 10
Wind 20ft/late(mph) E 11 NE 14 G17 E 10
Mixing Hgt(ft-agl/msl)5100 4160
Transport Wnd (mph) E 5 E 7
Vent Rate (kt-ft) 20400 24960
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-070745-
Saint Thomas and Saint John-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Pcldy Mcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 50 60 60
Temp (24h trend) 88 (+1) 76 (-3) 87
RH % (24h trend) 64 (-4) 99 (+5) 65
Wind 20ft/early(mph) NE 11 NE 13 SE 8
Wind 20ft/late(mph) NE 11 NE 13 SE 8
Mixing Hgt(ft-agl/msl)3280 3180
Transport Wnd (mph) E 16 SE 9
Vent Rate (kt-ft) 45920 25440
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-070745-
St Croix-
335 AM AST Mon Oct 6 2025
Today Tonight Tue
Cloud Cover Pcldy Pcldy Mcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 60 60 60
Temp (24h trend) 90 (+2) 76 (-2) 89
RH % (24h trend) 64 (-3) 99 (+5) 65
Wind 20ft/early(mph) E 10 NE 10 SE 8
Wind 20ft/late(mph) E 10 NE 10 SE 8
Mixing Hgt(ft-agl/msl)3640 4230
Transport Wnd (mph) E 14 SE 10
Vent Rate (kt-ft) 43680 38070
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$