Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
636
FNCA52 TJSJ 120836
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
436 AM AST Wed Nov 12 2025
.DISCUSSION...
Patchesof moisture will continue to reach the islands during the
morning hours, resulting in RH values in the mid to upper 50s
across the southern coastal plains of Puerto Rico. Surface winds
will remain from the east at 15 mph or less, but with gusty winds
near the coastal areas. Given the actual conditions of the soils
across the islands and the weather pattern, the fire danger threat
will remain low for today.
PRZ014-130845-
Southeast Coastal Plains-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Mclear Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 10 20 40
Temp (24h trend) 89 (+1) 72 (-2) 88
RH % (24h trend) 50 (-10) 89 (0) 56
Wind 20ft/early(mph) E 17 G22 NE 11 E 14 G19
Wind 20ft/late(mph) E 17 G22 NE 11 E 14 G19
Mixing Hgt(ft-agl/msl)5170 4490
Transport Wnd (mph) E 15 E 13
Vent Rate (kt-ft) 67210 49390
Dispersion 5 5
DSI 6 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ015-130845-
Southern Hills-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 20 30
Temp (24h trend) 86 (+2) 69 (-3) 85
RH % (24h trend) 60 (-6) 95 (+1) 63
Wind 20ft/early(mph) E 12 NE 12 E 11
Wind 20ft/late(mph) E 12 NE 12 E 11
Mixing Hgt(ft-agl/msl)5350 5080
Transport Wnd (mph) E 15 E 13
Vent Rate (kt-ft) 69550 55880
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-130845-
North Coastal Plains-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 20 40
Temp (24h trend) 86 (-3) 72 (-3) 87
RH % (24h trend) 66 (0) 96 (+1) 67
Wind 20ft/early(mph) E 17 G19 E 16 E 14
Wind 20ft/late(mph) E 17 G19 E 16 E 14
Mixing Hgt(ft-agl/msl)4630 4510
Transport Wnd (mph) E 17 E 13
Vent Rate (kt-ft) 69450 49610
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-130845-
Northern Hills-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 10 50
Temp (24h trend) 85 (-2) 70 (-2) 85
RH % (24h trend) 66 (+3) 96 (0) 67
Wind 20ft/early(mph) NE 14 E 13 E 13
Wind 20ft/late(mph) NE 14 E 13 E 13
Mixing Hgt(ft-agl/msl)4910 4980
Transport Wnd (mph) E 17 E 12
Vent Rate (kt-ft) 73650 49800
Dispersion 5 5
DSI 6 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ018-130845-
West Coast-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 30 30
Temp (24h trend) 89 (0) 70 (-2) 88
RH % (24h trend) 62 (-1) 95 (-1) 63
Wind 20ft/early(mph) E 17 E 17 E 12
Wind 20ft/late(mph) E 17 E 17 E 12
Mixing Hgt(ft-agl/msl)4730 4570
Transport Wnd (mph) E 12 E 8
Vent Rate (kt-ft) 47300 31990
Dispersion 5 5
DSI 5 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-130845-
Eastern Interior-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 40 40
Temp (24h trend) 86 (0) 70 (-2) 87
RH % (24h trend) 64 (-3) 98 (0) 65
Wind 20ft/early(mph) E 12 E 12 E 10
Wind 20ft/late(mph) E 12 E 12 E 10
Mixing Hgt(ft-agl/msl)5140 4690
Transport Wnd (mph) E 15 E 12
Vent Rate (kt-ft) 66820 46900
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-130845-
Luquillo Mountain Range-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 50 40
Temp (24h trend) 82 (+2) 68 (-2) 83
RH % (24h trend) 70 (-7) 100 (0) 69
Wind 20ft/early(mph) E 11 E 9 E 9
Wind 20ft/late(mph) E 11 E 9 E 9
Mixing Hgt(ft-agl/msl)4380 3850
Transport Wnd (mph) E 15 E 13
Vent Rate (kt-ft) 56940 42350
Dispersion 5 5
DSI 5 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-130845-
Central Mountain Range-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 10 40
Temp (24h trend) 84 (+2) 67 (-3) 84
RH % (24h trend) 66 (+1) 96 (+1) 66
Wind 20ft/early(mph) NE 12 E 12 E 9
Wind 20ft/late(mph) NE 12 E 12 E 9
Mixing Hgt(ft-agl/msl)5480 5580
Transport Wnd (mph) E 15 E 9
Vent Rate (kt-ft) 71240 44640
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-130845-
Cayey Mountain Range-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 30 40
Temp (24h trend) 82 (+1) 69 (-1) 82
RH % (24h trend) 67 (-6) 99 (-1) 69
Wind 20ft/early(mph) E 11 NE 10 E 9
Wind 20ft/late(mph) E 11 NE 10 E 9
Mixing Hgt(ft-agl/msl)4680 4060
Transport Wnd (mph) E 16 E 12
Vent Rate (kt-ft) 65520 40600
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ025-130845-
Vieques-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 40 40
Temp (24h trend) 88 (+1) 75 (+1) 89
RH % (24h trend) 61 (-5) 94 (-5) 60
Wind 20ft/early(mph) E 13 E 16 G20 E 12
Wind 20ft/late(mph) E 13 E 16 G20 E 12
Mixing Hgt(ft-agl/msl)3480 3350
Transport Wnd (mph) E 15 E 17
Vent Rate (kt-ft) 45240 50250
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-130845-
Culebra-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 40 40
Temp (24h trend) 90 (+2) 74 (-1) 90
RH % (24h trend) 60 (-7) 99 (0) 60
Wind 20ft/early(mph) E 12 E 16 G20 E 11
Wind 20ft/late(mph) E 12 E 16 G20 E 11
Mixing Hgt(ft-agl/msl)3310 3260
Transport Wnd (mph) E 17 E 16
Vent Rate (kt-ft) 49650 45640
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-130845-
Southwest Coastal Plains and Mona Island-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 40 20 10
Temp (24h trend) 90 (+1) 71 (-3) 90
RH % (24h trend) 50 (-7) 92 (+3) 53
Wind 20ft/early(mph) E 17 G22 E 14 G17 E 17 G23
Wind 20ft/late(mph) E 17 G22 E 14 G17 E 17 G23
Mixing Hgt(ft-agl/msl)5270 4990
Transport Wnd (mph) E 12 E 13
Vent Rate (kt-ft) 52700 54890
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-130845-
Saint Thomas and Saint John-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 40 40
Temp (24h trend) 85 (0) 71 (-4) 85
RH % (24h trend) 68 (-5) 100 (+3) 70
Wind 20ft/early(mph) E 14 G18 E 16 G20 E 11
Wind 20ft/late(mph) E 14 G18 E 16 G20 E 11
Mixing Hgt(ft-agl/msl)3430 3390
Transport Wnd (mph) E 17 E 16
Vent Rate (kt-ft) 51450 47460
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-130845-
St Croix-
436 AM AST Wed Nov 12 2025
Today Tonight Thu
Cloud Cover Mclear Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 10 30 40
Temp (24h trend) 90 (+3) 73 (-4) 88
RH % (24h trend) 61 (-8) 97 (+4) 64
Wind 20ft/early(mph) E 13 E 16 G19 E 11
Wind 20ft/late(mph) E 13 E 16 G19 E 11
Mixing Hgt(ft-agl/msl)4020 4280
Transport Wnd (mph) E 17 E 15
Vent Rate (kt-ft) 60300 55640
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$