Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
823
FNCA52 TJSJ 030815
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
415 AM AST Wed Dec 3 2025
.DISCUSSION...
Similar to yesterday, occasional showers will move across the
windward locations in PR and the USVI. Then, afternoon showers
will form over the interior, northwestern quadrant and downwind
from the mountains of PR. Minimum RH values are expected to
remain above the 50% critical level. Winds will be mainly from the
east to southeast at 5 to 12 mph, with higher gusts and sea breeze
variations. Thus, the fire danger risk is low today.
PRZ014-040815-
Southeast Coastal Plains-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 20 40
Temp (24h trend) 86 (0) 70 (-2) 88
RH % (24h trend) 54 (-4) 91 (+3) 51
Wind 20ft/early(mph) SE 10 NE 9 E 16 G21
Wind 20ft/late(mph) SE 10 NE 9 E 16 G21
Mixing Hgt(ft-agl/msl)4480 5120
Transport Wnd (mph) E 10 E 13
Vent Rate (kt-ft) 40320 56320
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ015-040815-
Southern Hills-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 60 20 50
Temp (24h trend) 83 (+2) 67 (-2) 84
RH % (24h trend) 66 (-3) 99 (+4) 65
Wind 20ft/early(mph) SE 8 NE 9 E 11
Wind 20ft/late(mph) SE 8 NE 9 E 11
Mixing Hgt(ft-agl/msl)4810 5140
Transport Wnd (mph) E 9 E 13
Vent Rate (kt-ft) 38480 56540
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-040815-
North Coastal Plains-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 40 40
Temp (24h trend) 86 (0) 70 (-1) 86
RH % (24h trend) 64 (-5) 100 (+3) 68
Wind 20ft/early(mph) E 11 E 10 E 14
Wind 20ft/late(mph) E 11 E 10 E 14
Mixing Hgt(ft-agl/msl)4160 4220
Transport Wnd (mph) E 9 E 15
Vent Rate (kt-ft) 33280 54860
Dispersion 5 5
DSI 5 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ017-040815-
Northern Hills-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 50 20 50
Temp (24h trend) 85 (+1) 68 (-1) 84
RH % (24h trend) 66 (-4) 100 (+3) 70
Wind 20ft/early(mph) E 9 E 8 NE 12
Wind 20ft/late(mph) E 9 E 8 NE 12
Mixing Hgt(ft-agl/msl)4660 4590
Transport Wnd (mph) E 7 E 14
Vent Rate (kt-ft) 27960 55080
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ018-040815-
West Coast-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 70 10 70
Temp (24h trend) 86 (0) 68 (-2) 88
RH % (24h trend) 65 (-3) 100 (+5) 65
Wind 20ft/early(mph) E 9 NE 9 E 12
Wind 20ft/late(mph) E 9 NE 9 E 12
Mixing Hgt(ft-agl/msl)4260 3800
Transport Wnd (mph) SE 6 E 9
Vent Rate (kt-ft) 21300 30400
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-040815-
Eastern Interior-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 50 50 50
Temp (24h trend) 85 (+2) 69 (-1) 84
RH % (24h trend) 65 (-5) 100 (+2) 70
Wind 20ft/early(mph) E 10 E 10 E 11
Wind 20ft/late(mph) E 10 E 10 E 11
Mixing Hgt(ft-agl/msl)4760 4780
Transport Wnd (mph) E 12 E 13
Vent Rate (kt-ft) 47600 52580
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-040815-
Luquillo Mountain Range-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 50 50 50
Temp (24h trend) 81 (+2) 67 (-2) 80
RH % (24h trend) 71 (-5) 100 (0) 75
Wind 20ft/early(mph) E 9 E 8 E 9
Wind 20ft/late(mph) E 9 E 8 E 9
Mixing Hgt(ft-agl/msl)4350 3690
Transport Wnd (mph) SE 12 E 14
Vent Rate (kt-ft) 43500 44280
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ023-040815-
Central Mountain Range-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 70 10 60
Temp (24h trend) 83 (+4) 65 (-2) 83
RH % (24h trend) 67 (-6) 99 (+3) 70
Wind 20ft/early(mph) E 5 E 6 NE 10
Wind 20ft/late(mph) E 5 E 6 NE 10
Mixing Hgt(ft-agl/msl)5350 5200
Transport Wnd (mph) E 6 E 13
Vent Rate (kt-ft) 26750 57200
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-040815-
Cayey Mountain Range-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 50 40 60
Temp (24h trend) 80 (0) 67 (-1) 80
RH % (24h trend) 70 (-2) 100 (0) 74
Wind 20ft/early(mph) E 8 E 8 E 10
Wind 20ft/late(mph) E 8 E 8 E 10
Mixing Hgt(ft-agl/msl)4620 4370
Transport Wnd (mph) E 12 E 15
Vent Rate (kt-ft) 46200 56810
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ025-040815-
Vieques-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 40 40
Temp (24h trend) 85 (-1) 73 (-1) 86
RH % (24h trend) 63 (-2) 99 (+4) 64
Wind 20ft/early(mph) E 11 E 12 E 13
Wind 20ft/late(mph) E 11 E 12 E 13
Mixing Hgt(ft-agl/msl)3440 3170
Transport Wnd (mph) E 15 E 17
Vent Rate (kt-ft) 44720 47550
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-040815-
Culebra-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 40 40
Temp (24h trend) 87 (+1) 74 (-2) 87
RH % (24h trend) 61 (-4) 98 (+4) 63
Wind 20ft/early(mph) E 11 E 12 E 12
Wind 20ft/late(mph) E 11 E 12 E 12
Mixing Hgt(ft-agl/msl)3610 3300
Transport Wnd (mph) E 15 E 16
Vent Rate (kt-ft) 46930 46200
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-040815-
Southwest Coastal Plains and Mona Island-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 60 20 60
Temp (24h trend) 88 (+2) 69 (-3) 89
RH % (24h trend) 52 (-3) 91 (+3) 49
Wind 20ft/early(mph) E 12 NE 9 E 13 G18
Wind 20ft/late(mph) E 12 NE 9 E 13 G18
Mixing Hgt(ft-agl/msl)4520 4790
Transport Wnd (mph) E 12 E 7
Vent Rate (kt-ft) 45200 28740
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-040815-
Saint Thomas and Saint John-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 40 40
Temp (24h trend) 85 (0) 73 (-2) 85
RH % (24h trend) 67 (-1) 100 (+9) 68
Wind 20ft/early(mph) E 12 E 12 E 13 G17
Wind 20ft/late(mph) E 12 E 12 E 13 G17
Mixing Hgt(ft-agl/msl)3550 3310
Transport Wnd (mph) E 15 E 17
Vent Rate (kt-ft) 46150 49650
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-040815-
St Croix-
415 AM AST Wed Dec 3 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 40 40
Temp (24h trend) 85 (0) 73 (-2) 86
RH % (24h trend) 67 (0) 100 (+10) 69
Wind 20ft/early(mph) E 11 E 11 E 13
Wind 20ft/late(mph) E 11 E 11 E 13
Mixing Hgt(ft-agl/msl)4250 3960
Transport Wnd (mph) E 15 E 18
Vent Rate (kt-ft) 55250 63360
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$