


Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
462 FNCA52 TJSJ 040647 FWFSJU Fire Weather Planning Forecast for Puerto Rico National Weather Service San Juan PR 247 AM AST Sat Oct 4 2025 .DISCUSSION... Another day with light and variable winds between 5 to 10 mph. Relative humidity trend suggests values near to below thresholds over the southern coastal plains of Puerto Rico (near 55%), showers and thunderstorms are expected over the mountain ranges into southern portions of Puerto Rico in the afternoon. At this time, the fire danger threat will remain low today. PRZ014-050700- Southeast Coastal Plains- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Pcldy Pcldy Pcldy Precip Type Tstms Showers Showers Chance Precip (%) 60 40 30 Temp (24h trend) 91 (+1) 73 (-1) 91 RH % (24h trend) 58 (-2) 95 (+4) 60 Wind 20ft/early(mph) SE 9 NE 6 SE 11 Wind 20ft/late(mph) SE 9 NE 6 SE 11 Mixing Hgt(ft-agl/msl)4290 3690 Transport Wnd (mph) SE 6 SE 9 Vent Rate (kt-ft) 21450 29520 Dispersion 5 5 DSI 5 1 5 RH Recovery Excellent Remarks...None. $$ PRZ015-050700- Southern Hills- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Pcldy Mclear Pcldy Precip Type Tstms Showers Showers Chance Precip (%) 70 30 40 Temp (24h trend) 88 (+3) 70 (-1) 88 RH % (24h trend) 60 (-3) 98 (+4) 62 Wind 20ft/early(mph) SE 6 Lgt/Var SE 9 Wind 20ft/late(mph) SE 6 Lgt/Var SE 9 Mixing Hgt(ft-agl/msl)5380 4220 Transport Wnd (mph) E 6 SE 7 Vent Rate (kt-ft) 26900 25320 Dispersion 5 5 DSI 5 1 5 RH Recovery Excellent Remarks...None. $$ PRZ016-050700- North Coastal Plains- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Pcldy Pcldy Pcldy Precip Type Tstms Showers Tstms Chance Precip (%) 70 40 60 Temp (24h trend) 90 (+1) 73 (-1) 91 RH % (24h trend) 62 (-2) 98 (+3) 63 Wind 20ft/early(mph) E 10 SE 8 E 11 Wind 20ft/late(mph) E 10 SE 8 E 11 Mixing Hgt(ft-agl/msl)4560 3760 Transport Wnd (mph) E 7 E 9 Vent Rate (kt-ft) 27360 30080 Dispersion 5 5 DSI 5 2 5 RH Recovery Excellent Remarks...None. $$ PRZ017-050700- Northern Hills- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Pcldy Pcldy Pcldy Precip Type Tstms Showers Tstms Chance Precip (%) 90 20 70 Temp (24h trend) 88 (+1) 70 (-2) 89 RH % (24h trend) 62 (-2) 98 (+2) 64 Wind 20ft/early(mph) E 8 Lgt/Var NE 8 Wind 20ft/late(mph) E 8 Lgt/Var NE 8 Mixing Hgt(ft-agl/msl)5400 3260 Transport Wnd (mph) E 5 NE 5 Vent Rate (kt-ft) 21600 13040 Dispersion 5 5 DSI 5 1 5 RH Recovery Excellent Remarks...None. $$ PRZ018-050700- West Coast- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Pcldy Mclear Pcldy Precip Type Tstms None Tstms Chance Precip (%) 70 0 50 Temp (24h trend) 91 (+1) 72 (-1) 91 RH % (24h trend) 60 (-2) 97 (+3) 63 Wind 20ft/early(mph) SE 6 Lgt/Var E 9 Wind 20ft/late(mph) SE 6 Lgt/Var E 9 Mixing Hgt(ft-agl/msl)4570 3220 Transport Wnd (mph) SE 3 S 6 Vent Rate (kt-ft) 13710 16100 Dispersion 5 5 DSI 5 1 5 RH Recovery Excellent Remarks...None. $$ PRZ019-050700- Eastern Interior- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Mcldy Pcldy Pcldy Precip Type Tstms Showers Showers Chance Precip (%) 80 50 40 Temp (24h trend) 89 (+2) 71 (-1) 89 RH % (24h trend) 62 (-1) 99 (+2) 63 Wind 20ft/early(mph) E 8 E 6 E 9 Wind 20ft/late(mph) E 8 E 6 E 9 Mixing Hgt(ft-agl/msl)5420 4930 Transport Wnd (mph) SE 6 SE 8 Vent Rate (kt-ft) 27100 34510 Dispersion 5 5 DSI 5 1 5 RH Recovery Excellent Remarks...None. $$ PRZ022-050700- Luquillo Mountain Range- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Mcldy Pcldy Pcldy Precip Type Tstms Showers Tstms Chance Precip (%) 80 50 50 Temp (24h trend) 84 (+2) 69 (-2) 86 RH % (24h trend) 67 (-2) 100 (0) 67 Wind 20ft/early(mph) E 8 E 5 E 9 Wind 20ft/late(mph) E 8 E 5 E 9 Mixing Hgt(ft-agl/msl)4780 4230 Transport Wnd (mph) SE 7 SE 10 Vent Rate (kt-ft) 28680 38070 Dispersion 5 5 DSI 4 1 5 RH Recovery Excellent Remarks...None. $$ PRZ023-050700- Central Mountain Range- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Pcldy Mclear Pcldy Precip Type Tstms Showers Tstms Chance Precip (%) 90 10 60 Temp (24h trend) 87 (+4) 68 (-2) 87 RH % (24h trend) 63 (-3) 98 (+2) 65 Wind 20ft/early(mph) Lgt/Var Lgt/Var E 5 Wind 20ft/late(mph) Lgt/Var Lgt/Var E 5 Mixing Hgt(ft-agl/msl)5960 4400 Transport Wnd (mph) SE 3 S 5 Vent Rate (kt-ft) 17880 17600 Dispersion 5 5 DSI 4 1 4 RH Recovery Excellent Remarks...None. $$ PRZ024-050700- Cayey Mountain Range- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Pcldy Pcldy Pcldy Precip Type Tstms Showers Showers Chance Precip (%) 70 50 30 Temp (24h trend) 85 (+1) 69 (-1) 85 RH % (24h trend) 64 (-1) 100 (+1) 66 Wind 20ft/early(mph) E 6 Lgt/Var SE 8 Wind 20ft/late(mph) E 6 Lgt/Var SE 8 Mixing Hgt(ft-agl/msl)4560 4470 Transport Wnd (mph) SE 7 SE 8 Vent Rate (kt-ft) 27360 31290 Dispersion 5 5 DSI 5 1 5 RH Recovery Excellent Remarks...None. $$ PRZ025-050700- Vieques- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Mcldy Pcldy Pcldy Precip Type Tstms Showers Showers Chance Precip (%) 60 40 50 Temp (24h trend) 90 (+1) 76 (-1) 90 RH % (24h trend) 60 (+2) 96 (+5) 58 Wind 20ft/early(mph) E 6 E 8 E 8 Wind 20ft/late(mph) E 6 E 8 E 8 Mixing Hgt(ft-agl/msl)3380 3250 Transport Wnd (mph) E 8 E 8 Vent Rate (kt-ft) 23660 22750 Dispersion 5 5 DSI 6 5 6 RH Recovery Excellent Remarks...None. $$ PRZ026-050700- Culebra- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Mcldy Pcldy Pcldy Precip Type Tstms Showers Showers Chance Precip (%) 60 40 50 Temp (24h trend) 92 (+2) 76 (-2) 92 RH % (24h trend) 57 (-4) 96 (+5) 57 Wind 20ft/early(mph) E 6 E 8 E 9 Wind 20ft/late(mph) E 6 E 8 E 9 Mixing Hgt(ft-agl/msl)3050 3350 Transport Wnd (mph) SE 7 E 10 Vent Rate (kt-ft) 18300 30150 Dispersion 5 5 DSI 6 5 6 RH Recovery Excellent Remarks...None. $$ PRZ027-050700- Southwest Coastal Plains and Mona Island- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Pcldy Mclear Pcldy Precip Type Tstms Showers Showers Chance Precip (%) 50 10 30 Temp (24h trend) 92 (+1) 74 (-1) 92 RH % (24h trend) 56 (-1) 93 (+6) 58 Wind 20ft/early(mph) SE 9 E 6 SE 12 G17 Wind 20ft/late(mph) SE 9 E 6 SE 12 G17 Mixing Hgt(ft-agl/msl)4740 4050 Transport Wnd (mph) SE 6 SE 10 Vent Rate (kt-ft) 23700 36450 Dispersion 5 5 DSI 5 2 5 RH Recovery Excellent Remarks...None. $$ VIZ001-050700- Saint Thomas and Saint John- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Pcldy Pcldy Pcldy Precip Type Tstms Showers Showers Chance Precip (%) 50 40 50 Temp (24h trend) 87 (+1) 75 (-3) 88 RH % (24h trend) 64 (-2) 100 (+9) 63 Wind 20ft/early(mph) E 6 E 8 E 9 Wind 20ft/late(mph) E 6 E 8 E 9 Mixing Hgt(ft-agl/msl)3200 3350 Transport Wnd (mph) E 6 E 10 Vent Rate (kt-ft) 16000 30150 Dispersion 5 5 DSI 6 5 6 RH Recovery Excellent Remarks...None. $$ VIZ002-050700- St Croix- 247 AM AST Sat Oct 4 2025 Today Tonight Sun Cloud Cover Pcldy Pcldy Pcldy Precip Type Tstms Showers Showers Chance Precip (%) 50 40 50 Temp (24h trend) 90 (+2) 75 (-3) 90 RH % (24h trend) 64 (-2) 98 (+6) 63 Wind 20ft/early(mph) E 6 E 8 E 8 Wind 20ft/late(mph) E 6 E 8 E 8 Mixing Hgt(ft-agl/msl)4220 4350 Transport Wnd (mph) E 8 E 9 Vent Rate (kt-ft) 29540 34800 Dispersion 5 5 DSI 6 5 6 RH Recovery Excellent Remarks...None. $$ $$