747 FNCA52 TJSJ 300808 FWFSJU Fire Weather Planning Forecast for Puerto Rico National Weather Service San Juan PR 408 AM AST Tue Dec 30 2025 .DISCUSSION... Drier conditions will persist across the region; however, winds will veer more from the east-southeast later today, allowing pockets of moisture to move across the islands. This increase in moisture should help relative humidity values remain in the upper 50s by early afternoon. Surface winds will shift to an easterly direction and increase to around 15 mph during the afternoon. KDBI values continue to rise, with the last readings near 540 at Cabo Rojo and 503 at Camp Santiago. Given the expected conditions, there is a moderate risk of fire danger along the southern coastal plains. PRZ014-310815- Southeast Coastal Plains- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Mclear Precip Type None Showers Showers Chance Precip (%) 0 20 20 Temp (24h trend) 84 (+3) 67 (+1) 87 RH % (24h trend) 45 (-6) 90 (+2) 50 Wind 20ft/early(mph) SE 12 G17 E 8 SE 11 Wind 20ft/late(mph) SE 12 G17 E 8 SE 11 Mixing Hgt(ft-agl/msl)4430 3830 Transport Wnd (mph) SE 12 SE 9 Vent Rate (kt-ft) 44300 30640 Dispersion 5 5 DSI 5 2 5 RH Recovery Excellent Remarks...None. $$ PRZ015-310815- Southern Hills- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Pcldy Precip Type Showers Showers Showers Chance Precip (%) 0 10 20 Temp (24h trend) 82 (+6) 63 (-1) 83 RH % (24h trend) 56 (-7) 99 (+5) 62 Wind 20ft/early(mph) SE 10 E 6 SE 10 Wind 20ft/late(mph) SE 10 E 6 SE 10 Mixing Hgt(ft-agl/msl)4730 4250 Transport Wnd (mph) SE 8 SE 8 Vent Rate (kt-ft) 33110 29750 Dispersion 5 5 DSI 5 1 5 RH Recovery Excellent Remarks...None. $$ PRZ016-310815- North Coastal Plains- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Mclear Precip Type Showers None Showers Chance Precip (%) 0 0 10 Temp (24h trend) 84 (+4) 66 (0) 86 RH % (24h trend) 56 (-5) 94 (-3) 60 Wind 20ft/early(mph) E 11 SE 9 E 11 Wind 20ft/late(mph) E 11 SE 9 E 11 Mixing Hgt(ft-agl/msl)5080 3830 Transport Wnd (mph) SE 7 E 7 Vent Rate (kt-ft) 30480 22980 Dispersion 5 5 DSI 5 2 5 RH Recovery Excellent Remarks...None. $$ PRZ017-310815- Northern Hills- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Mclear Precip Type Showers None Showers Chance Precip (%) 20 0 30 Temp (24h trend) 83 (+4) 64 (0) 84 RH % (24h trend) 55 (-5) 94 (-4) 61 Wind 20ft/early(mph) NE 9 SE 6 NE 8 Wind 20ft/late(mph) NE 9 SE 6 NE 8 Mixing Hgt(ft-agl/msl)5400 4240 Transport Wnd (mph) S 2 E 3 Vent Rate (kt-ft) 10800 12720 Dispersion 5 5 DSI 5 1 5 RH Recovery Excellent Remarks...None. $$ PRZ018-310815- West Coast- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Pcldy Precip Type Showers Showers Showers Chance Precip (%) 0 20 30 Temp (24h trend) 84 (+3) 66 (0) 86 RH % (24h trend) 57 (+1) 95 (+4) 60 Wind 20ft/early(mph) SE 12 E 12 E 11 Wind 20ft/late(mph) SE 12 E 12 E 11 Mixing Hgt(ft-agl/msl)4580 3610 Transport Wnd (mph) SE 10 SE 8 Vent Rate (kt-ft) 41220 25270 Dispersion 5 5 DSI 5 3 6 RH Recovery Excellent Remarks...None. $$ PRZ019-310815- Eastern Interior- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Mclear Precip Type Showers Showers Showers Chance Precip (%) 10 10 10 Temp (24h trend) 83 (+5) 64 (-1) 85 RH % (24h trend) 58 (-8) 99 (+1) 62 Wind 20ft/early(mph) SE 11 SE 8 SE 9 Wind 20ft/late(mph) SE 11 SE 8 SE 9 Mixing Hgt(ft-agl/msl)4830 4470 Transport Wnd (mph) SE 9 SE 8 Vent Rate (kt-ft) 38640 31290 Dispersion 5 5 DSI 5 2 5 RH Recovery Excellent Remarks...None. $$ PRZ022-310815- Luquillo Mountain Range- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Pcldy Precip Type Showers Showers Showers Chance Precip (%) 10 10 20 Temp (24h trend) 78 (+6) 61 (-4) 81 RH % (24h trend) 63 (-13) 100 (+1) 65 Wind 20ft/early(mph) SE 10 SE 6 SE 8 Wind 20ft/late(mph) SE 10 SE 6 SE 8 Mixing Hgt(ft-agl/msl)4650 3580 Transport Wnd (mph) SE 12 SE 8 Vent Rate (kt-ft) 46500 25060 Dispersion 5 5 DSI 5 2 5 RH Recovery Excellent Remarks...None. $$ PRZ023-310815- Central Mountain Range- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Pcldy Precip Type Showers Showers Showers Chance Precip (%) 20 10 30 Temp (24h trend) 81 (+7) 61 (-1) 83 RH % (24h trend) 55 (-10) 98 (-1) 61 Wind 20ft/early(mph) SE 8 SE 6 SE 6 Wind 20ft/late(mph) SE 8 SE 6 SE 6 Mixing Hgt(ft-agl/msl)5540 5130 Transport Wnd (mph) S 3 SE 5 Vent Rate (kt-ft) 16620 20520 Dispersion 5 5 DSI 5 1 5 RH Recovery Excellent Remarks...None. $$ PRZ024-310815- Cayey Mountain Range- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Mclear Precip Type Showers Showers Showers Chance Precip (%) 10 20 20 Temp (24h trend) 78 (+5) 62 (-1) 80 RH % (24h trend) 62 (-9) 100 (0) 67 Wind 20ft/early(mph) SE 9 E 5 SE 8 Wind 20ft/late(mph) SE 9 E 5 SE 8 Mixing Hgt(ft-agl/msl)4590 3810 Transport Wnd (mph) SE 12 SE 8 Vent Rate (kt-ft) 45900 26670 Dispersion 5 5 DSI 5 1 5 RH Recovery Excellent Remarks...None. $$ PRZ025-310815- Vieques- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Mclear Precip Type Showers Showers Showers Chance Precip (%) 10 20 20 Temp (24h trend) 82 (+2) 68 (-3) 86 RH % (24h trend) 53 (-10) 99 (+13) 57 Wind 20ft/early(mph) SE 11 E 9 SE 9 Wind 20ft/late(mph) SE 11 E 9 SE 9 Mixing Hgt(ft-agl/msl)5070 3730 Transport Wnd (mph) E 12 SE 12 Vent Rate (kt-ft) 50700 37300 Dispersion 5 5 DSI 6 6 6 RH Recovery Excellent Remarks...None. $$ PRZ026-310815- Culebra- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Mclear Precip Type Showers Showers Showers Chance Precip (%) 10 10 10 Temp (24h trend) 83 (+3) 70 (-3) 86 RH % (24h trend) 55 (-10) 95 (+9) 57 Wind 20ft/early(mph) SE 12 SE 10 SE 9 Wind 20ft/late(mph) SE 12 SE 10 SE 9 Mixing Hgt(ft-agl/msl)5140 3820 Transport Wnd (mph) E 12 SE 13 Vent Rate (kt-ft) 51400 42020 Dispersion 5 5 DSI 6 6 6 RH Recovery Excellent Remarks...None. $$ PRZ027-310815- Southwest Coastal Plains and Mona Island- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Pcldy Precip Type None Showers Showers Chance Precip (%) 0 20 30 Temp (24h trend) 84 (+2) 67 (-1) 87 RH % (24h trend) 46 (-2) 89 (+5) 52 Wind 20ft/early(mph) SE 16 G20 E 14 G18 SE 17 G22 Wind 20ft/late(mph) SE 16 G20 E 14 G18 SE 17 G22 Mixing Hgt(ft-agl/msl)4530 3760 Transport Wnd (mph) SE 14 SE 15 Vent Rate (kt-ft) 54360 48880 Dispersion 5 5 DSI 5 3 6 RH Recovery Excellent Remarks...None. $$ VIZ001-310815- Saint Thomas and Saint John- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Clear Precip Type None None None Chance Precip (%) 0 0 0 Temp (24h trend) 83 (+4) 69 (-4) 84 RH % (24h trend) 56 (-10) 96 (+11) 60 Wind 20ft/early(mph) SE 10 SE 10 SE 10 Wind 20ft/late(mph) SE 10 SE 10 SE 10 Mixing Hgt(ft-agl/msl)5330 3910 Transport Wnd (mph) E 12 SE 12 Vent Rate (kt-ft) 53300 39100 Dispersion 5 5 DSI 6 6 6 RH Recovery Excellent Remarks...None. $$ VIZ002-310815- St Croix- 408 AM AST Tue Dec 30 2025 Today Tonight Wed Cloud Cover Mclear Mclear Mclear Precip Type None Showers Showers Chance Precip (%) 0 20 10 Temp (24h trend) 82 (+2) 69 (-4) 84 RH % (24h trend) 57 (-6) 96 (+18) 61 Wind 20ft/early(mph) SE 11 E 10 E 11 Wind 20ft/late(mph) SE 11 E 10 E 11 Mixing Hgt(ft-agl/msl)4600 4090 Transport Wnd (mph) SE 13 SE 12 Vent Rate (kt-ft) 50600 40900 Dispersion 5 5 DSI 6 6 6 RH Recovery Excellent Remarks...None. $$ $$