Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
986
FNCA52 TJSJ 200710
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
310 AM AST Wed Aug 20 2025
.DISCUSSION...
Drier conditions are expected to prevail today and in the upcoming
days. However, southeasterly winds will maintain relative
humidities in the upper 50s and low 60s. Since wetting rains were
observed in the last couple of days, the risk of fire spreading
will remain low.
PRZ014-210715-
Southeast Coastal Plains-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 20 10 20
Temp (24h trend) 92 (+4) 75 (-3) 92
RH % (24h trend) 64 (-7) 91 (0) 57
Wind 20ft/early(mph) SE 14 G19 E 13 G17 E 14 G19
Wind 20ft/late(mph) SE 14 G19 E 13 G17 E 14 G19
Mixing Hgt(ft-agl/msl)4030 4660
Transport Wnd (mph) SE 16 E 15
Vent Rate (kt-ft) 56420 60580
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ015-210715-
Southern Hills-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 30 0 10
Temp (24h trend) 88 (+5) 71 (-5) 88
RH % (24h trend) 65 (-9) 97 (+4) 60
Wind 20ft/early(mph) SE 11 E 11 E 11
Wind 20ft/late(mph) SE 11 E 11 E 11
Mixing Hgt(ft-agl/msl)4780 5410
Transport Wnd (mph) SE 16 E 13
Vent Rate (kt-ft) 66920 59510
Dispersion 5 5
DSI 6 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-210715-
North Coastal Plains-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 40 10 0
Temp (24h trend) 93 (+2) 75 (-3) 91
RH % (24h trend) 60 (-4) 96 (+2) 62
Wind 20ft/early(mph) E 16 G18 E 13 E 18
Wind 20ft/late(mph) E 16 G18 E 13 E 18
Mixing Hgt(ft-agl/msl)5020 5030
Transport Wnd (mph) E 14 E 15
Vent Rate (kt-ft) 60240 65390
Dispersion 5 5
DSI 5 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-210715-
Northern Hills-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Mclear
Precip Type Tstms None None
Chance Precip (%) 50 0 0
Temp (24h trend) 93 (+4) 72 (-3) 90
RH % (24h trend) 57 (-6) 98 (+2) 60
Wind 20ft/early(mph) E 12 E 11 NE 16
Wind 20ft/late(mph) E 12 E 11 NE 16
Mixing Hgt(ft-agl/msl)5750 5810
Transport Wnd (mph) SE 12 E 12
Vent Rate (kt-ft) 57500 58100
Dispersion 5 5
DSI 5 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ018-210715-
West Coast-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Clear
Precip Type Showers None None
Chance Precip (%) 20 0 0
Temp (24h trend) 94 (+5) 72 (-4) 93
RH % (24h trend) 60 (-8) 99 (+5) 58
Wind 20ft/early(mph) SE 14 E 12 E 11
Wind 20ft/late(mph) SE 14 E 12 E 11
Mixing Hgt(ft-agl/msl)4520 4850
Transport Wnd (mph) SE 16 E 9
Vent Rate (kt-ft) 63280 38800
Dispersion 5 5
DSI 6 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-210715-
Eastern Interior-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 10 30
Temp (24h trend) 90 (+3) 72 (-5) 89
RH % (24h trend) 64 (-5) 97 (+1) 63
Wind 20ft/early(mph) SE 14 E 11 E 11
Wind 20ft/late(mph) SE 14 E 11 E 11
Mixing Hgt(ft-agl/msl)5040 5350
Transport Wnd (mph) SE 16 E 13
Vent Rate (kt-ft) 70560 58850
Dispersion 5 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ022-210715-
Luquillo Mountain Range-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 10 30
Temp (24h trend) 85 (+4) 70 (-4) 84
RH % (24h trend) 73 (-6) 100 (+1) 71
Wind 20ft/early(mph) SE 13 E 10 E 10
Wind 20ft/late(mph) SE 13 E 10 E 10
Mixing Hgt(ft-agl/msl)3720 4180
Transport Wnd (mph) SE 17 E 15
Vent Rate (kt-ft) 55800 54340
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-210715-
Central Mountain Range-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers None None
Chance Precip (%) 40 0 0
Temp (24h trend) 89 (+7) 69 (-4) 87
RH % (24h trend) 62 (-12) 98 (+3) 62
Wind 20ft/early(mph) SE 10 E 6 E 9
Wind 20ft/late(mph) SE 10 E 6 E 9
Mixing Hgt(ft-agl/msl)5580 6750
Transport Wnd (mph) SE 13 E 9
Vent Rate (kt-ft) 61380 54000
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-210715-
Cayey Mountain Range-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 10 30
Temp (24h trend) 85 (+3) 71 (-4) 84
RH % (24h trend) 72 (-5) 99 (0) 68
Wind 20ft/early(mph) SE 11 E 9 E 10
Wind 20ft/late(mph) SE 11 E 9 E 10
Mixing Hgt(ft-agl/msl)4160 4650
Transport Wnd (mph) SE 16 E 15
Vent Rate (kt-ft) 58240 60450
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ025-210715-
Vieques-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 10 30
Temp (24h trend) 90 (+1) 77 (-2) 90
RH % (24h trend) 61 (-3) 91 (-3) 58
Wind 20ft/early(mph) E 16 G20 E 16 G19 E 13
Wind 20ft/late(mph) E 16 G20 E 16 G19 E 13
Mixing Hgt(ft-agl/msl)3170 3540
Transport Wnd (mph) E 18 E 18
Vent Rate (kt-ft) 50720 56640
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-210715-
Culebra-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 10 30
Temp (24h trend) 91 (+1) 77 (-3) 91
RH % (24h trend) 62 (-4) 92 (-3) 59
Wind 20ft/early(mph) E 16 G20 E 16 G20 E 13 G17
Wind 20ft/late(mph) E 16 G20 E 16 G20 E 13 G17
Mixing Hgt(ft-agl/msl)3090 3490
Transport Wnd (mph) E 21 E 21
Vent Rate (kt-ft) 55620 62820
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-210715-
Southwest Coastal Plains and Mona Island-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Mclear Clear Clear
Precip Type Showers None None
Chance Precip (%) 30 0 0
Temp (24h trend) 93 (+4) 75 (-4) 93
RH % (24h trend) 58 (-9) 91 (+4) 53
Wind 20ft/early(mph) SE 18 G23 E 16 G21 E 16 G21
Wind 20ft/late(mph) SE 18 G23 E 16 G21 E 16 G21
Mixing Hgt(ft-agl/msl)4430 4810
Transport Wnd (mph) SE 20 E 14
Vent Rate (kt-ft) 75310 57720
Dispersion 5 5
DSI 6 4 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-210715-
Saint Thomas and Saint John-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Mclear Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 10 10 30
Temp (24h trend) 88 (+1) 76 (-3) 88
RH % (24h trend) 67 (-4) 95 (0) 63
Wind 20ft/early(mph) E 16 G20 E 16 G20 E 14 G18
Wind 20ft/late(mph) E 16 G20 E 16 G20 E 14 G18
Mixing Hgt(ft-agl/msl)3340 3280
Transport Wnd (mph) E 21 E 21
Vent Rate (kt-ft) 60120 59040
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-210715-
St Croix-
310 AM AST Wed Aug 20 2025
Today Tonight Thu
Cloud Cover Mclear Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 10 30
Temp (24h trend) 90 (+2) 77 (-3) 90
RH % (24h trend) 64 (-5) 92 (-2) 61
Wind 20ft/early(mph) E 16 G20 E 16 G19 E 13 G17
Wind 20ft/late(mph) E 16 G20 E 16 G19 E 13 G17
Mixing Hgt(ft-agl/msl)3690 4350
Transport Wnd (mph) E 21 E 17
Vent Rate (kt-ft) 66420 65250
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$