FNCA52 TJSJ 230755 FWFSJU Fire Weather Planning Forecast for Puerto Rico National Weather Service San Juan PR 330 AM AST Sun Aug 23 2026 .DISCUSSION... An increase in moisture along the region will result in Rh values in the upper 40s along most of the areas briefly increasing again due to the cloudiness and showers. Surface winds are forecast to remain from the east at 15 mph or less with gusty winds across coastal areas. The constant variable is the critical fuels continue across the islands, with moderate to extreme drought conditions. Given the expected conditions, there is a moderate risk of fire danger threat for Today. PRZ014-232000- Southeast Coastal Plains- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Mclear Mclear Mclear Precip Type Showers Showers Showers Chance Precip (%) 10 10 10 Temp (24h trend) 93 (+1) 76 (-2) 93 RH % (24h trend) 48 (-4) 86 (+6) 48 Wind 20ft/early(mph) E 14 E 13 E 16 Wind 20ft/late(mph) SE 16 E 12 SE 16 Mixing Hgt(ft-agl/msl)5420 5580 Transport Wnd (mph) E 16 E 17 Vent Rate (kt-ft) 75880 83700 Dispersion 5 5 DSI 6 4 6 RH Recovery Excellent Remarks...None. $$ PRZ015-232000- Southern Hills- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Mclear Mclear Mclear Precip Type Showers Showers Showers Chance Precip (%) 30 10 10 Temp (24h trend) 91 (+4) 72 (-2) 91 RH % (24h trend) 56 (-6) 97 (+9) 56 Wind 20ft/early(mph) E 12 E 11 E 12 Wind 20ft/late(mph) SE 12 E 11 SE 13 Mixing Hgt(ft-agl/msl)6150 6070 Transport Wnd (mph) E 15 E 16 Vent Rate (kt-ft) 79950 84980 Dispersion 5 5 DSI 6 3 6 RH Recovery Excellent Remarks...None. $$ PRZ016-232000- North Coastal Plains- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Pcldy Mclear Mclear Precip Type Tstms Showers Showers Chance Precip (%) 30 20 10 Temp (24h trend) 93 (+3) 75 (-2) 93 RH % (24h trend) 59 (-6) 96 (+6) 58 Wind 20ft/early(mph) E 12 E 17 E 12 Wind 20ft/late(mph) E 20 E 11 E 20 Mixing Hgt(ft-agl/msl)5410 5440 Transport Wnd (mph) E 16 E 16 Vent Rate (kt-ft) 75740 76160 Dispersion 5 5 DSI 6 5 6 RH Recovery Excellent Remarks...None. $$ PRZ017-232000- Northern Hills- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Pcldy Mclear Mclear Precip Type Tstms Showers Showers Chance Precip (%) 70 10 40Temp (24h trend) 91 (+2) 73 (0) 91 RH % (24h trend) 61 (-4) 98 (+4) 61 Wind 20ft/early(mph) E 11 E 13 E 11 Wind 20ft/late(mph) E 16 E 8 E 17 Mixing Hgt(ft-agl/msl)6300 6310 Transport Wnd (mph) E 14 E 14 Vent Rate (kt-ft) 75600 75720 Dispersion 5 5 DSI 6 3 6 RH Recovery Excellent Remarks...None. $$ PRZ018-232000- West Coast- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Pcldy Mclear Pcldy Precip Type Tstms Showers Tstms Chance Precip (%) 60 10 60 Temp (24h trend) 94 (+2) 74 (0) 94 RH % (24h trend) 57 (-6) 98 (+3) 59 Wind 20ft/early(mph) E 12 E 12 E 13 Wind 20ft/late(mph) E 13 E 11 SE 14 Mixing Hgt(ft-agl/msl)4830 5250 Transport Wnd (mph) E 12 E 12 Vent Rate (kt-ft) 48300 52500 Dispersion 5 5 DSI 6 4 6 RH Recovery Excellent Remarks...None. $$ PRZ019-232000- Eastern Interior- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Pcldy Pcldy Mclear Precip Type Showers Showers Showers Chance Precip (%) 30 40 30 Temp (24h trend) 92 (+4) 74 (-2) 92 RH % (24h trend) 57 (-5) 97 (+9) 57 Wind 20ft/early(mph) E 12 E 12 E 13 Wind 20ft/late(mph) E 13 E 12 E 13 Mixing Hgt(ft-agl/msl)6890 6660 Transport Wnd (mph) E 15 E 16 Vent Rate (kt-ft) 89570 93240 Dispersion 5 5 DSI 6 3 6 RH Recovery Excellent Remarks...None. $$ PRZ022-232000- Luquillo Mountain Range- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Pcldy Pcldy Pcldy Precip Type Showers Showers Showers Chance Precip (%) 50 40 30 Temp (24h trend) 87 (+5) 71 (-3) 87 RH % (24h trend) 64 (-9) 100 (+9) 65 Wind 20ft/early(mph) E 11 E 10 E 11 Wind 20ft/late(mph) E 11 E 10 E 11 Mixing Hgt(ft-agl/msl)4560 4530 Transport Wnd (mph) E 16 E 17 Vent Rate (kt-ft) 63840 67950 Dispersion 5 5 DSI 6 4 6 RH Recovery Excellent Remarks...None. $$ PRZ023-232000- Central Mountain Range- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Pcldy Mclear Mclear Precip Type Tstms Showers Tstms Chance Precip (%) 60 10 70 Temp (24h trend) 89 (+5) 70 (-1) 89 RH % (24h trend) 62 (-7) 100 (+5) 63 Wind 20ft/early(mph) E 9 E 9 E 9 Wind 20ft/late(mph) SE 10 E 6 E 10 Mixing Hgt(ft-agl/msl)7730 7440 Transport Wnd (mph) E 10 E 12 Vent Rate (kt-ft) 69570 74400 Dispersion 5 5 DSI 6 2 5 RH Recovery Excellent Remarks...None. $$ PRZ024-232000- Cayey Mountain Range- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Pcldy Mclear Mclear Precip Type Showers Showers Showers Chance Precip (%) 30 30 20 Temp (24h trend) 87 (+3) 72 (-2) 87 RH % (24h trend) 64 (-2) 99 (+6) 63 Wind 20ft/early(mph) E 10 E 10 E 11 Wind 20ft/late(mph) E 11 E 10 E 11 Mixing Hgt(ft-agl/msl)5690 5500 Transport Wnd (mph) E 15 E 16 Vent Rate (kt-ft) 73970 77000 Dispersion 5 5 DSI 6 3 6 RH Recovery Excellent Remarks...None. $$ PRZ025-232000- Vieques- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Pcldy Pcldy Mclear Precip Type Tstms Showers Showers Chance Precip (%) 60 40 30 Temp (24h trend) 91 (+1) 80 (-1) 91 RH % (24h trend) 58 (-2) 85 (+7) 57 Wind 20ft/early(mph) E 16 E 16 E 14 Wind 20ft/late(mph) E 14 E 16 E 14 Mixing Hgt(ft-agl/msl)3330 3340 Transport Wnd (mph) E 18 E 18 Vent Rate (kt-ft) 53280 53440 Dispersion 5 5 DSI 6 6 6 RH Recovery Excellent Remarks...None. $$ PRZ026-232000- Culebra- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Pcldy Pcldy Mclear Precip Type Tstms Showers Showers Chance Precip (%) 60 40 30 Temp (24h trend) 92 (+3) 79 (-3) 92 RH % (24h trend) 59 (-6) 90 (+9) 59 Wind 20ft/early(mph) E 16 E 17 E 14 Wind 20ft/late(mph) E 13 E 17 E 14 Mixing Hgt(ft-agl/msl)3330 3240 Transport Wnd (mph) E 20 E 18 Vent Rate (kt-ft) 56610 51840 Dispersion 5 5 DSI 6 6 6 RH Recovery Excellent Remarks...None. $$ PRZ027-232000- Southwest Coastal Plains and Mona Island- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Mclear Mclear Mclear Precip Type Showers Showers Showers Chance Precip (%) 30 1020 Temp (24h trend) 94 (+2) 76 (-1) 94 RH % (24h trend) 49 (-5) 92 (+10) 49 Wind 20ft/early(mph) E 17 E 16 E 18 Wind 20ft/late(mph) SE 19 E 16 SE 20 Mixing Hgt(ft-agl/msl)5180 5310 Transport Wnd (mph) E 17 E 18 Vent Rate (kt-ft) 77700 84960 Dispersion 5 5 DSI 6 5 6 RH Recovery Excellent Remarks...None. $$ VIZ001-232000- Saint Thomas and Saint John- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Pcldy Pcldy Mclear Precip Type Showers Showers Showers Chance Precip (%) 50 40 40 Temp (24h trend) 90 (+2) 79 (-2) 90 RH % (24h trend) 60 (-4) 90 (+9) 60 Wind 20ft/early(mph) E 16 E 17 E 16 Wind 20ft/late(mph) E 14 E 17 E 14 Mixing Hgt(ft-agl/msl)3250 3270 Transport Wnd (mph) E 21 E 20 Vent Rate (kt-ft) 58500 55590 Dispersion 5 5 DSI 6 6 6 RH Recovery Excellent Remarks...None. $$ VIZ002-232000- St Croix- 330 AM AST Sun Aug 23 2026 Today Tonight Mon Cloud Cover Mclear Pcldy Mclear Precip Type Showers Showers Showers Chance Precip (%) 20 30 10 Temp (24h trend) 91 (+2) 79 (-2) 91 RH % (24h trend) 63 (-1) 89 (+6) 63 Wind 20ft/early(mph) E 16 E 17 E 14 Wind 20ft/late(mph) E 14 E 16 E 14 Mixing Hgt(ft-agl/msl)4830 4900 Transport Wnd (mph) E 20 E 20 Vent Rate (kt-ft) 82110 83300 Dispersion 5 5 DSI 6 6 6 RH Recovery Excellent Remarks...None. $$