Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
454
FNCA52 TJSJ 020920
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
520 AM AST Tue Dec 2 2025
.DISCUSSION...
Occasional showers will move across the windward locations in PR
and the USVI today. Then, afternoon showers will form over the
interior and mountain areas of PR. Minimum RH values are expected
to remain above the 50% critical level. Winds will be mainly from
the southeast at 5 to 10 mph, with higher gusts and sea breeze
variations. Thus, the fire danger risk is low today.
PRZ014-030930-
Southeast Coastal Plains-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 80 60 50
Temp (24h trend) 87 (+1) 70 (-1) 86
RH % (24h trend) 53 (-8) 93 (+2) 53
Wind 20ft/early(mph) SE 6 NE 5 SE 10
Wind 20ft/late(mph) SE 6 NE 5 SE 10
Mixing Hgt(ft-agl/msl)3940 3960
Transport Wnd (mph) NE 3 E 9
Vent Rate (kt-ft) 11820 31680
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ015-030930-
Southern Hills-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 80 60 60
Temp (24h trend) 84 (+3) 66 (-3) 83
RH % (24h trend) 62 (-5) 98 (+4) 65
Wind 20ft/early(mph) SE 5 NE 5 SE 8
Wind 20ft/late(mph) SE 5 NE 5 SE 8
Mixing Hgt(ft-agl/msl)4170 4520
Transport Wnd (mph) NE 5 E 8
Vent Rate (kt-ft) 16680 31640
Dispersion 5 5
DSI 4 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-030930-
North Coastal Plains-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 40 40
Temp (24h trend) 87 (+2) 69 (-3) 86
RH % (24h trend) 64 (-4) 99 (+4) 64
Wind 20ft/early(mph) NE 9 E 8 E 11
Wind 20ft/late(mph) NE 9 E 8 E 11
Mixing Hgt(ft-agl/msl)3960 3950
Transport Wnd (mph) NE 8 E 8
Vent Rate (kt-ft) 27720 27650
Dispersion 5 5
DSI 6 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ017-030930-
Northern Hills-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 60 40 50
Temp (24h trend) 85 (+3) 67 (-3) 84
RH % (24h trend) 67 (-1) 99 (+2) 67
Wind 20ft/early(mph) NE 8 E 8 NE 9
Wind 20ft/late(mph) NE 8 E 8 NE 9
Mixing Hgt(ft-agl/msl)4030 4410
Transport Wnd (mph) NE 8 E 6
Vent Rate (kt-ft) 28210 22050
Dispersion 5 5
DSI 6 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ018-030930-
West Coast-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 40 60 60
Temp (24h trend) 87 (+1) 69 (-1) 86
RH % (24h trend) 63 (-4) 98 (+2) 65
Wind 20ft/early(mph) NW 10 NE 10 E 8
Wind 20ft/late(mph) NW 10 NE 10 E 8
Mixing Hgt(ft-agl/msl)3750 4030
Transport Wnd (mph) NE 7 SE 5
Vent Rate (kt-ft) 22500 16120
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-030930-
Eastern Interior-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Mcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 70 50 50
Temp (24h trend) 85 (+3) 67 (-3) 85
RH % (24h trend) 65 (-4) 100 (+2) 65
Wind 20ft/early(mph) NE 5 E 5 E 9
Wind 20ft/late(mph) NE 5 E 5 E 9
Mixing Hgt(ft-agl/msl)3940 4530
Transport Wnd (mph) NE 6 E 9
Vent Rate (kt-ft) 19700 36240
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-030930-
Luquillo Mountain Range-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 50 50
Temp (24h trend) 82 (+5) 66 (-2) 81
RH % (24h trend) 70 (-4) 100 (+1) 70
Wind 20ft/early(mph) E 5 Lgt/Var E 8
Wind 20ft/late(mph) E 5 Lgt/Var E 8
Mixing Hgt(ft-agl/msl)3790 4130
Transport Wnd (mph) NE 7 E 10
Vent Rate (kt-ft) 22740 37170
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ023-030930-
Central Mountain Range-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 80 50 60
Temp (24h trend) 82 (+4) 64 (-3) 82
RH % (24h trend) 67 (-3) 98 (+2) 68
Wind 20ft/early(mph) NE 9 E 8 E 5
Wind 20ft/late(mph) NE 9 E 8 E 5
Mixing Hgt(ft-agl/msl)4250 5150
Transport Wnd (mph) NE 7 E 6
Vent Rate (kt-ft) 25500 25750
Dispersion 5 5
DSI 5 1 4
RH Recovery Excellent
Remarks...None.
$$
PRZ024-030930-
Cayey Mountain Range-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 80 50 50
Temp (24h trend) 82 (+4) 66 (-2) 81
RH % (24h trend) 68 (-3) 100 (+1) 68
Wind 20ft/early(mph) Lgt/Var Lgt/Var E 8
Wind 20ft/late(mph) Lgt/Var Lgt/Var E 8
Mixing Hgt(ft-agl/msl)4020 4470
Transport Wnd (mph) NE 6 E 10
Vent Rate (kt-ft) 20100 40230
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ025-030930-
Vieques-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 50 40
Temp (24h trend) 86 (+1) 72 (-1) 85
RH % (24h trend) 62 (-1) 96 (+1) 63
Wind 20ft/early(mph) E 6 SE 8 E 10
Wind 20ft/late(mph) E 6 SE 8 E 10
Mixing Hgt(ft-agl/msl)3150 3350
Transport Wnd (mph) NE 10 E 12
Vent Rate (kt-ft) 28350 33500
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-030930-
Culebra-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 50 50
Temp (24h trend) 87 (+2) 74 (-1) 87
RH % (24h trend) 60 (-3) 95 (+2) 61
Wind 20ft/early(mph) SE 6 SE 9 E 11
Wind 20ft/late(mph) SE 6 SE 9 E 11
Mixing Hgt(ft-agl/msl)3040 3360
Transport Wnd (mph) NE 12 E 13
Vent Rate (kt-ft) 30400 36960
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-030930-
Southwest Coastal Plains and Mona Island-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Mclear Pcldy Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 50 60 60
Temp (24h trend) 88 (+2) 70 (-1) 88
RH % (24h trend) 50 (-12) 94 (+4) 52
Wind 20ft/early(mph) SW 9 NE 10 SE 11
Wind 20ft/late(mph) SW 9 NE 10 SE 11
Mixing Hgt(ft-agl/msl)4190 4520
Transport Wnd (mph) E 5 E 9
Vent Rate (kt-ft) 16760 36160
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-030930-
Saint Thomas and Saint John-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 50 50 40
Temp (24h trend) 86 (+2) 71 (-4) 84
RH % (24h trend) 64 (-1) 98 (+5) 67
Wind 20ft/early(mph) SE 10 SE 10 E 12
Wind 20ft/late(mph) SE 10 SE 10 E 12
Mixing Hgt(ft-agl/msl)3090 3530
Transport Wnd (mph) SE 12 E 14
Vent Rate (kt-ft) 30900 42360
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-030930-
St Croix-
520 AM AST Tue Dec 2 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 50 50
Temp (24h trend) 85 (+1) 72 (-3) 85
RH % (24h trend) 64 (-1) 95 (+3) 66
Wind 20ft/early(mph) SE 8 SE 9 E 11
Wind 20ft/late(mph) SE 8 SE 9 E 11
Mixing Hgt(ft-agl/msl)3500 4190
Transport Wnd (mph) SE 8 E 15
Vent Rate (kt-ft) 24500 54470
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
$$