Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
856
FNCA52 TJSJ 280950
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
550 AM AST Fri Nov 28 2025
.DISCUSSION...
Periods of showers and isolated thunderstorms today and tonight,
with a limited flooding risk across Puerto Rico and the U.S.
Virgin Islands. Winds will be mainly from the east to northeast at
around 12 to 20 mph, with higher gusts and sea breeze variations.
Low risk of fire weather today.
PRZ014-291000-
Southeast Coastal Plains-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 50 30 20
Temp (24h trend) 86 (-1) 70 (-3) 88
RH % (24h trend) 64 (+2) 94 (+2) 57
Wind 20ft/early(mph) E 16 G21 NE 10 E 17 G22
Wind 20ft/late(mph) E 16 G21 NE 10 E 17 G22
Mixing Hgt(ft-agl/msl)4310 5050
Transport Wnd (mph) E 15 E 16
Vent Rate (kt-ft) 56030 70700
Dispersion 5 5
DSI 5 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ015-291000-
Southern Hills-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 10 30
Temp (24h trend) 83 (+1) 67 (-3) 85
RH % (24h trend) 68 (+1) 98 (+4) 61
Wind 20ft/early(mph) E 12 E 9 E 12
Wind 20ft/late(mph) E 12 E 9 E 12
Mixing Hgt(ft-agl/msl)4890 5520
Transport Wnd (mph) E 15 E 15
Vent Rate (kt-ft) 63570 71760
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-291000-
North Coastal Plains-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 30 30
Temp (24h trend) 86 (-1) 70 (-2) 88
RH % (24h trend) 67 (+1) 98 (+1) 62
Wind 20ft/early(mph) E 16 G18 E 12 E 18
Wind 20ft/late(mph) E 16 G18 E 12 E 18
Mixing Hgt(ft-agl/msl)4090 5120
Transport Wnd (mph) E 16 E 18
Vent Rate (kt-ft) 57260 81920
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-291000-
Northern Hills-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 0 30
Temp (24h trend) 84 (-1) 68 (-2) 86
RH % (24h trend) 68 (+4) 98 (0) 62
Wind 20ft/early(mph) E 14 E 11 E 17
Wind 20ft/late(mph) E 14 E 11 E 17
Mixing Hgt(ft-agl/msl)4750 5640
Transport Wnd (mph) E 14 E 15
Vent Rate (kt-ft) 57000 73320
Dispersion 5 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ018-291000-
West Coast-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 60 0 50
Temp (24h trend) 87 (0) 68 (-2) 88
RH % (24h trend) 66 (+1) 99 (+3) 61
Wind 20ft/early(mph) E 13 E 9 E 13
Wind 20ft/late(mph) E 13 E 9 E 13
Mixing Hgt(ft-agl/msl)4170 4350
Transport Wnd (mph) E 12 E 10
Vent Rate (kt-ft) 41700 39150
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-291000-
Eastern Interior-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 60 40
Temp (24h trend) 84 (+1) 68 (-3) 85
RH % (24h trend) 70 (+2) 99 (+1) 64
Wind 20ft/early(mph) E 11 E 11 E 13
Wind 20ft/late(mph) E 11 E 11 E 13
Mixing Hgt(ft-agl/msl)4390 5360
Transport Wnd (mph) E 14 E 16
Vent Rate (kt-ft) 52680 75040
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-291000-
Luquillo Mountain Range-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Mcldy Mcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 60 50
Temp (24h trend) 79 (+1) 66 (-3) 81
RH % (24h trend) 76 (+1) 100 (0) 70
Wind 20ft/early(mph) E 10 E 8 E 11
Wind 20ft/late(mph) E 10 E 8 E 11
Mixing Hgt(ft-agl/msl)3200 4040
Transport Wnd (mph) E 15 E 17
Vent Rate (kt-ft) 41600 60600
Dispersion 5 5
DSI 5 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-291000-
Central Mountain Range-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Pcldy Clear Pcldy
Precip Type Tstms None Showers
Chance Precip (%) 70 0 50
Temp (24h trend) 83 (+3) 65 (-3) 84
RH % (24h trend) 68 (0) 98 (+1) 63
Wind 20ft/early(mph) E 9 E 6 E 10
Wind 20ft/late(mph) E 9 E 6 E 10
Mixing Hgt(ft-agl/msl)5490 6300
Transport Wnd (mph) E 12 E 12
Vent Rate (kt-ft) 54900 63000
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-291000-
Cayey Mountain Range-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 60 30
Temp (24h trend) 79 (0) 66 (-3) 81
RH % (24h trend) 76 (+3) 100 (0) 70
Wind 20ft/early(mph) E 9 E 8 E 11
Wind 20ft/late(mph) E 9 E 8 E 11
Mixing Hgt(ft-agl/msl)3590 4330
Transport Wnd (mph) E 15 E 17
Vent Rate (kt-ft) 46670 64950
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ025-291000-
Vieques-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Mcldy Mcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 60 50
Temp (24h trend) 85 (0) 73 (-1) 86
RH % (24h trend) 64 (-1) 96 (0) 60
Wind 20ft/early(mph) E 13 G17 E 14 G18 E 16 G20
Wind 20ft/late(mph) E 13 G17 E 14 G18 E 16 G20
Mixing Hgt(ft-agl/msl)3250 3710
Transport Wnd (mph) E 17 E 20
Vent Rate (kt-ft) 48750 63070
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-291000-
Culebra-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Mcldy Mcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 50 60 40
Temp (24h trend) 86 (0) 74 (-2) 88
RH % (24h trend) 61 (-3) 95 (0) 57
Wind 20ft/early(mph) E 14 G18 E 14 G18 E 16 G20
Wind 20ft/late(mph) E 14 G18 E 14 G18 E 16 G20
Mixing Hgt(ft-agl/msl)3270 3710
Transport Wnd (mph) E 18 E 21
Vent Rate (kt-ft) 52320 66780
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-291000-
Southwest Coastal Plains and Mona Island-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 40 20 40
Temp (24h trend) 88 (0) 70 (-3) 90
RH % (24h trend) 63 (+2) 94 (+5) 57
Wind 20ft/early(mph) E 18 G24 E 13 G18 E 19 G25
Wind 20ft/late(mph) E 18 G24 E 13 G18 E 19 G25
Mixing Hgt(ft-agl/msl)4740 5190
Transport Wnd (mph) E 16 E 14
Vent Rate (kt-ft) 66360 62280
Dispersion 5 5
DSI 5 4 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-291000-
Saint Thomas and Saint John-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 50 60 30
Temp (24h trend) 85 (0) 73 (-3) 86
RH % (24h trend) 65 (-2) 99 (+4) 62
Wind 20ft/early(mph) E 14 G19 E 16 G20 E 17 G21
Wind 20ft/late(mph) E 14 G19 E 16 G20 E 17 G21
Mixing Hgt(ft-agl/msl)3270 3780
Transport Wnd (mph) E 18 E 22
Vent Rate (kt-ft) 52320 71820
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-291000-
St Croix-
550 AM AST Fri Nov 28 2025
Today Tonight Sat
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 60 30
Temp (24h trend) 86 (+1) 73 (-2) 87
RH % (24h trend) 67 (-1) 97 (+3) 63
Wind 20ft/early(mph) E 13 G17 E 14 G17 E 16 G20
Wind 20ft/late(mph) E 13 G17 E 14 G17 E 16 G20
Mixing Hgt(ft-agl/msl)3860 4720
Transport Wnd (mph) E 18 E 22
Vent Rate (kt-ft) 61760 89680
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$