Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
277
FNCA52 TJSJ 260822
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
422 AM AST Sat Jul 26 2025
.DISCUSSION...
Breezy conditions are expected to continue with easterly winds
between 15 and 20 mph and higher gusts. Relative humidity values
may briefly reach the lower 40s across southern areas of Puerto
Rico, nevertheless, showers are expected to develop over these
areas later today, which are likely to limit the fire weather.
PRZ014-270830-
Southeast Coastal Plains-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Mclear Pcldy Cloudy
Precip Type Showers Showers Tstms
Chance Precip (%) 20 50 80
Temp (24h trend) 93 (+2) 75 (0) 90
RH % (24h trend) 43 (-8) 90 (+3) 53
Wind 20ft/early(mph) E 20 G26 NE 13 G18 E 16 G21
Wind 20ft/late(mph) E 20 G26 NE 13 G18 E 16 G21
Mixing Hgt(ft-agl/msl)5540 4690
Transport Wnd (mph) E 16 E 18
Vent Rate (kt-ft) 77560 75040
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ015-270830-
Southern Hills-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Mcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 50 40 80
Temp (24h trend) 89 (+4) 71 (-1) 86
RH % (24h trend) 54 (-10) 99 (+6) 67
Wind 20ft/early(mph) E 16 NE 12 E 13
Wind 20ft/late(mph) E 16 NE 12 E 13
Mixing Hgt(ft-agl/msl)6290 5510
Transport Wnd (mph) E 15 E 17
Vent Rate (kt-ft) 81770 82650
Dispersion 5 5
DSI 5 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ016-270830-
North Coastal Plains-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Mclear Pcldy Mcldy
Precip Type Showers Tstms Tstms
Chance Precip (%) 10 60 70
Temp (24h trend) 90 (+2) 74 (-1) 89
RH % (24h trend) 59 (-9) 100 (+5) 68
Wind 20ft/early(mph) E 19 G22 E 18 E 16 G18
Wind 20ft/late(mph) E 19 G22 E 18 E 16 G18
Mixing Hgt(ft-agl/msl)5090 4910
Transport Wnd (mph) E 18 E 18
Vent Rate (kt-ft) 81440 78560
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-270830-
Northern Hills-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Mclear Pcldy Mcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 20 40 70
Temp (24h trend) 88 (+2) 72 (0) 85
RH % (24h trend) 62 (-9) 100 (+1) 74
Wind 20ft/early(mph) NE 17 E 16 E 14
Wind 20ft/late(mph) NE 17 E 16 E 14
Mixing Hgt(ft-agl/msl)6200 5690
Transport Wnd (mph) E 15 E 16
Vent Rate (kt-ft) 80600 79660
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ018-270830-
West Coast-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 70 50 60
Temp (24h trend) 92 (+2) 71 (-1) 89
RH % (24h trend) 56 (-9) 100 (+3) 66
Wind 20ft/early(mph) E 13 NE 18 E 16
Wind 20ft/late(mph) E 13 NE 18 E 16
Mixing Hgt(ft-agl/msl)5270 4420
Transport Wnd (mph) E 9 E 10
Vent Rate (kt-ft) 42160 39780
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-270830-
Eastern Interior-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Cloudy
Precip Type Showers Tstms Tstms
Chance Precip (%) 20 70 80
Temp (24h trend) 89 (+3) 72 (-2) 86
RH % (24h trend) 59 (-6) 100 (+5) 72
Wind 20ft/early(mph) E 13 E 12 SE 12
Wind 20ft/late(mph) E 13 E 12 SE 12
Mixing Hgt(ft-agl/msl)5970 4550
Transport Wnd (mph) E 16 E 18
Vent Rate (kt-ft) 83580 72800
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ022-270830-
Luquillo Mountain Range-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Pcldy Mcldy Cloudy
Precip Type Showers Tstms Tstms
Chance Precip (%) 20 70 80
Temp (24h trend) 84 (+4) 69 (-3) 82
RH % (24h trend) 67 (-9) 100 (+3) 78
Wind 20ft/early(mph) E 12 E 10 SE 10
Wind 20ft/late(mph) E 12 E 10 SE 10
Mixing Hgt(ft-agl/msl)4900 3050
Transport Wnd (mph) E 17 E 20
Vent Rate (kt-ft) 73500 51850
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-270830-
Central Mountain Range-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Pcldy Mclear Mcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 50 20 60
Temp (24h trend) 86 (+4) 68 (-1) 83
RH % (24h trend) 61 (-11) 100 (+1) 75
Wind 20ft/early(mph) E 11 NE 13 E 11
Wind 20ft/late(mph) E 11 NE 13 E 11
Mixing Hgt(ft-agl/msl)7780 6260
Transport Wnd (mph) E 12 E 14
Vent Rate (kt-ft) 77800 75120
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-270830-
Cayey Mountain Range-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Cloudy
Precip Type Showers Tstms Tstms
Chance Precip (%) 20 60 80
Temp (24h trend) 85 (+2) 70 (-1) 82
RH % (24h trend) 63 (-4) 100 (+1) 77
Wind 20ft/early(mph) E 12 NE 10 E 10
Wind 20ft/late(mph) E 12 NE 10 E 10
Mixing Hgt(ft-agl/msl)5270 3330
Transport Wnd (mph) E 17 E 20
Vent Rate (kt-ft) 79050 56610
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ025-270830-
Vieques-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Pcldy Mcldy Cloudy
Precip Type Showers Tstms Tstms
Chance Precip (%) 20 60 80
Temp (24h trend) 89 (+1) 77 (-1) 89
RH % (24h trend) 57 (-4) 94 (+7) 62
Wind 20ft/early(mph) E 14 G19 E 16 G20 SE 14 G18
Wind 20ft/late(mph) E 14 G19 E 16 G20 SE 14 G18
Mixing Hgt(ft-agl/msl)4070 2930
Transport Wnd (mph) E 18 E 24
Vent Rate (kt-ft) 65120 61530
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-270830-
Culebra-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Pcldy Mcldy Cloudy
Precip Type Showers Tstms Tstms
Chance Precip (%) 20 60 80
Temp (24h trend) 91 (+3) 79 (0) 91
RH % (24h trend) 59 (-6) 95 (+8) 65
Wind 20ft/early(mph) E 14 G18 E 14 G19 SE 14 G19
Wind 20ft/late(mph) E 14 G18 E 14 G19 SE 14 G19
Mixing Hgt(ft-agl/msl)3890 3150
Transport Wnd (mph) E 21 E 23
Vent Rate (kt-ft) 70020 63000
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-270830-
Southwest Coastal Plains and Mona Island-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Mclear Mclear Mcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 50 20 60
Temp (24h trend) 93 (+2) 74 (0) 90
RH % (24h trend) 43 (-10) 89 (+1) 54
Wind 20ft/early(mph) E 20 G26 NE 16 E 21 G26
Wind 20ft/late(mph) E 20 G26 NE 16 E 21 G26
Mixing Hgt(ft-agl/msl)6020 4940
Transport Wnd (mph) E 12 E 18
Vent Rate (kt-ft) 60200 79040
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-270830-
Saint Thomas and Saint John-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Mcldy
Precip Type Showers Tstms Tstms
Chance Precip (%) 20 50 70
Temp (24h trend) 88 (+2) 76 (-3) 87
RH % (24h trend) 65 (-3) 98 (+11) 70
Wind 20ft/early(mph) E 16 G19 E 17 G21 E 16 G20
Wind 20ft/late(mph) E 16 G19 E 17 G21 E 16 G20
Mixing Hgt(ft-agl/msl)3890 2910
Transport Wnd (mph) E 21 E 23
Vent Rate (kt-ft) 70020 58200
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-270830-
St Croix-
422 AM AST Sat Jul 26 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Mcldy
Precip Type Showers Tstms Tstms
Chance Precip (%) 30 70 70
Temp (24h trend) 89 (+2) 77 (-1) 87
RH % (24h trend) 63 (-3) 96 (+8) 69
Wind 20ft/early(mph) E 16 G20 E 16 G19 E 13
Wind 20ft/late(mph) E 16 G20 E 16 G19 E 13
Mixing Hgt(ft-agl/msl)4600 3290
Transport Wnd (mph) E 21 E 16
Vent Rate (kt-ft) 82800 46060
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$