Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
883
FNCA52 TJSJ 210855
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
455 AM AST Fri Nov 21 2025
.DISCUSSION...
Once again, expect occasional showers moving across the windward
locations today, followed by afternoon convection across the
interior and southwest PR. There is a slight risk of thunderstorms
during the afternoon hours across the interior and southwest PR.
Winds should remain from the east, between 9 - 15 mph with gusts
up to 20 mph and sea breeze variations. RH values should remain
above the critical thresholds. Given the expected weather
conditions, no fire weather is expected today, hence, the threat
will remain once again low.
PRZ014-220900-
Southeast Coastal Plains-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 0 20
Temp (24h trend) 89 (+2) 69 (-4) 88
RH % (24h trend) 47 (-11) 85 (-4) 45
Wind 20ft/early(mph) E 14 G19 NE 11 E 14 G19
Wind 20ft/late(mph) E 14 G19 NE 11 E 14 G19
Mixing Hgt(ft-agl/msl)5050 5210
Transport Wnd (mph) E 9 E 9
Vent Rate (kt-ft) 40400 41680
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ015-220900-
Southern Hills-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 40 10 30
Temp (24h trend) 85 (+3) 66 (-4) 85
RH % (24h trend) 59 (-11) 95 (+3) 55
Wind 20ft/early(mph) E 11 NE 10 E 11
Wind 20ft/late(mph) E 11 NE 10 E 11
Mixing Hgt(ft-agl/msl)5080 5400
Transport Wnd (mph) E 8 E 8
Vent Rate (kt-ft) 35560 37800
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-220900-
North Coastal Plains-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 40 20 20
Temp (24h trend) 88 (+2) 71 (-2) 87
RH % (24h trend) 62 (-8) 94 (+1) 57
Wind 20ft/early(mph) NE 13 E 12 NE 13
Wind 20ft/late(mph) NE 13 E 12 NE 13
Mixing Hgt(ft-agl/msl)4760 4590
Transport Wnd (mph) E 13 E 13
Vent Rate (kt-ft) 52360 50490
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-220900-
Northern Hills-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 30 10 10
Temp (24h trend) 86 (+2) 68 (-3) 85
RH % (24h trend) 64 (-7) 96 (0) 58
Wind 20ft/early(mph) NE 11 E 11 NE 11
Wind 20ft/late(mph) NE 11 E 11 NE 11
Mixing Hgt(ft-agl/msl)4570 5000
Transport Wnd (mph) E 12 E 12
Vent Rate (kt-ft) 45700 50000
Dispersion 5 5
DSI 5 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ018-220900-
West Coast-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 70 20 30
Temp (24h trend) 88 (+1) 68 (-3) 88
RH % (24h trend) 61 (-7) 97 (+2) 56
Wind 20ft/early(mph) E 13 NE 14 SE 14
Wind 20ft/late(mph) E 13 NE 14 SE 14
Mixing Hgt(ft-agl/msl)4180 4740
Transport Wnd (mph) E 8 E 9
Vent Rate (kt-ft) 29260 37920
Dispersion 5 5
DSI 5 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-220900-
Eastern Interior-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 20 20
Temp (24h trend) 86 (+2) 67 (-4) 86
RH % (24h trend) 62 (-8) 95 (0) 57
Wind 20ft/early(mph) NE 11 NE 11 NE 10
Wind 20ft/late(mph) NE 11 NE 11 NE 10
Mixing Hgt(ft-agl/msl)5010 4880
Transport Wnd (mph) NE 9 E 10
Vent Rate (kt-ft) 40080 43920
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-220900-
Luquillo Mountain Range-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 30 30
Temp (24h trend) 82 (+3) 66 (-4) 81
RH % (24h trend) 68 (-8) 98 (+1) 62
Wind 20ft/early(mph) NE 9 NE 9 NE 9
Wind 20ft/late(mph) NE 9 NE 9 NE 9
Mixing Hgt(ft-agl/msl)4800 4780
Transport Wnd (mph) NE 10 E 12
Vent Rate (kt-ft) 43200 47800
Dispersion 5 5
DSI 5 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ023-220900-
Central Mountain Range-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 50 0 20
Temp (24h trend) 84 (+4) 65 (-3) 84
RH % (24h trend) 64 (-10) 98 (+2) 58
Wind 20ft/early(mph) NE 9 NE 11 NE 11
Wind 20ft/late(mph) NE 9 NE 11 NE 11
Mixing Hgt(ft-agl/msl)4940 5730
Transport Wnd (mph) NE 8 E 8
Vent Rate (kt-ft) 34580 40110
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-220900-
Cayey Mountain Range-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 20 10
Temp (24h trend) 82 (+2) 66 (-3) 82
RH % (24h trend) 64 (-9) 98 (0) 59
Wind 20ft/early(mph) E 10 NE 9 NE 9
Wind 20ft/late(mph) E 10 NE 9 NE 9
Mixing Hgt(ft-agl/msl)4870 4930
Transport Wnd (mph) NE 12 NE 12
Vent Rate (kt-ft) 48700 49300
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ025-220900-
Vieques-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 20 30
Temp (24h trend) 86 (0) 74 (-1) 85
RH % (24h trend) 61 (-5) 86 (-4) 57
Wind 20ft/early(mph) NE 11 NE 14 G18 NE 11
Wind 20ft/late(mph) NE 11 NE 14 G18 NE 11
Mixing Hgt(ft-agl/msl)3960 4560
Transport Wnd (mph) NE 15 E 14
Vent Rate (kt-ft) 51480 54720
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-220900-
Culebra-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 40 30
Temp (24h trend) 88 (+1) 75 (-1) 87
RH % (24h trend) 58 (-8) 86 (-3) 54
Wind 20ft/early(mph) NE 11 NE 13 G17 NE 12
Wind 20ft/late(mph) NE 11 NE 13 G17 NE 12
Mixing Hgt(ft-agl/msl)3970 4470
Transport Wnd (mph) E 15 E 14
Vent Rate (kt-ft) 51610 53640
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-220900-
Southwest Coastal Plains and Mona Island-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 40 50
Temp (24h trend) 89 (+1) 69 (-3) 88
RH % (24h trend) 48 (-9) 88 (-2) 41
Wind 20ft/early(mph) E 12 NE 16 G18 SE 13
Wind 20ft/late(mph) E 12 NE 16 G18 SE 13
Mixing Hgt(ft-agl/msl)4690 5190
Transport Wnd (mph) E 7 E 7
Vent Rate (kt-ft) 28140 31140
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-220900-
Saint Thomas and Saint John-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 20 20 20
Temp (24h trend) 86 (+1) 74 (-2) 85
RH % (24h trend) 62 (-7) 88 (-2) 58
Wind 20ft/early(mph) NE 12 NE 14 G19 NE 11
Wind 20ft/late(mph) NE 12 NE 14 G19 NE 11
Mixing Hgt(ft-agl/msl)3940 4380
Transport Wnd (mph) NE 16 E 14
Vent Rate (kt-ft) 55160 52560
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-220900-
St Croix-
455 AM AST Fri Nov 21 2025
Today Tonight Sat
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers None
Chance Precip (%) 20 20 0
Temp (24h trend) 87 (+1) 74 (-2) 85
RH % (24h trend) 64 (-5) 87 (-3) 59
Wind 20ft/early(mph) NE 12 NE 13 G17 NE 12
Wind 20ft/late(mph) NE 12 NE 13 G17 NE 12
Mixing Hgt(ft-agl/msl)4490 4890
Transport Wnd (mph) NE 15 E 15
Vent Rate (kt-ft) 58370 63570
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$