Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
043
FNCA52 TJSJ 280807
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
407 AM AST Thu Aug 28 2025
.DISCUSSION...
LOW Fire Weather Threat as a tropical wave will approach the
forecast area, increasing the potential for showers and
thunderstorms through at least Friday. Additionally, RH values
remain above fire weather criteria with wind speeds below 15 mph.
Conditions will continue to be monitored closely
throughout the day for any changes.
PRZ014-290815-
Southeast Coastal Plains-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 30 30
Temp (24h trend) 91 (+1) 74 (-2) 91
RH % (24h trend) 51 (-6) 93 (+6) 52
Wind 20ft/early(mph) SE 13 G17 E 9 SE 12
Wind 20ft/late(mph) SE 13 G17 E 9 SE 12
Mixing Hgt(ft-agl/msl)4700 4540
Transport Wnd (mph) SE 13 E 10
Vent Rate (kt-ft) 51700 40860
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ015-290815-
Southern Hills-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 30 20
Temp (24h trend) 89 (+4) 71 (-3) 89
RH % (24h trend) 62 (-5) 100 (+7) 62
Wind 20ft/early(mph) SE 11 E 8 SE 9
Wind 20ft/late(mph) SE 11 E 8 SE 9
Mixing Hgt(ft-agl/msl)5220 5370
Transport Wnd (mph) SE 13 E 10
Vent Rate (kt-ft) 57420 48330
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-290815-
North Coastal Plains-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 50 10 50
Temp (24h trend) 92 (+1) 74 (-2) 91
RH % (24h trend) 60 (-5) 100 (+5) 64
Wind 20ft/early(mph) E 13 SE 9 E 12
Wind 20ft/late(mph) E 13 SE 9 E 12
Mixing Hgt(ft-agl/msl)5400 4750
Transport Wnd (mph) SE 10 E 8
Vent Rate (kt-ft) 48600 33250
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ017-290815-
Northern Hills-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms None Tstms
Chance Precip (%) 60 0 60
Temp (24h trend) 90 (+2) 71 (-2) 89
RH % (24h trend) 63 (-2) 100 (+3) 66
Wind 20ft/early(mph) E 11 SE 6 NE 10
Wind 20ft/late(mph) E 11 SE 6 NE 10
Mixing Hgt(ft-agl/msl)5590 5640
Transport Wnd (mph) SE 8 E 6
Vent Rate (kt-ft) 39130 28200
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ018-290815-
West Coast-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 30 10 30
Temp (24h trend) 92 (+2) 73 (-1) 92
RH % (24h trend) 61 (-4) 99 (+3) 61
Wind 20ft/early(mph) SE 14 E 11 NE 9
Wind 20ft/late(mph) SE 14 E 11 NE 9
Mixing Hgt(ft-agl/msl)4650 4630
Transport Wnd (mph) SE 14 E 6
Vent Rate (kt-ft) 55800 23150
Dispersion 5 5
DSI 6 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-290815-
Eastern Interior-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 30 30
Temp (24h trend) 90 (+2) 72 (-3) 90
RH % (24h trend) 61 (-3) 100 (+5) 62
Wind 20ft/early(mph) SE 12 SE 8 E 10
Wind 20ft/late(mph) SE 12 SE 8 E 10
Mixing Hgt(ft-agl/msl)5890 5670
Transport Wnd (mph) SE 13 SE 9
Vent Rate (kt-ft) 64790 45360
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-290815-
Luquillo Mountain Range-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 40 40
Temp (24h trend) 86 (+4) 70 (-3) 86
RH % (24h trend) 66 (-8) 100 (+2) 67
Wind 20ft/early(mph) SE 10 SE 6 E 9
Wind 20ft/late(mph) SE 10 SE 6 E 9
Mixing Hgt(ft-agl/msl)4680 4500
Transport Wnd (mph) SE 13 SE 9
Vent Rate (kt-ft) 51480 36000
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-290815-
Central Mountain Range-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 40 10 50
Temp (24h trend) 87 (+4) 69 (-2) 87
RH % (24h trend) 64 (-7) 99 (+3) 66
Wind 20ft/early(mph) SE 9 SE 5 E 6
Wind 20ft/late(mph) SE 9 SE 5 E 6
Mixing Hgt(ft-agl/msl)5900 6560
Transport Wnd (mph) SE 10 E 7
Vent Rate (kt-ft) 53100 39360
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-290815-
Cayey Mountain Range-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 50 30
Temp (24h trend) 86 (+3) 71 (-2) 86
RH % (24h trend) 65 (-5) 100 (+2) 64
Wind 20ft/early(mph) SE 9 SE 5 E 8
Wind 20ft/late(mph) SE 9 SE 5 E 8
Mixing Hgt(ft-agl/msl)5100 4940
Transport Wnd (mph) SE 13 E 10
Vent Rate (kt-ft) 56100 44460
Dispersion 5 5
DSI 5 2 6
RH Recovery Excellent
Remarks...None.
$$
PRZ025-290815-
Vieques-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 40 40
Temp (24h trend) 90 (+1) 78 (0) 90
RH % (24h trend) 60 (-3) 93 (+4) 60
Wind 20ft/early(mph) SE 9 SE 10 E 10
Wind 20ft/late(mph) SE 9 SE 10 E 10
Mixing Hgt(ft-agl/msl)3550 3180
Transport Wnd (mph) SE 13 E 10
Vent Rate (kt-ft) 39050 28620
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-290815-
Culebra-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 30 40
Temp (24h trend) 92 (+3) 79 (0) 92
RH % (24h trend) 60 (-5) 95 (+5) 60
Wind 20ft/early(mph) SE 10 SE 11 E 10
Wind 20ft/late(mph) SE 10 SE 11 E 10
Mixing Hgt(ft-agl/msl)3540 3190
Transport Wnd (mph) SE 14 SE 14
Vent Rate (kt-ft) 42480 38280
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-290815-
Southwest Coastal Plains and Mona Island-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Mclear Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 10 20 20
Temp (24h trend) 93 (+3) 75 (-2) 93
RH % (24h trend) 51 (-6) 93 (+6) 51
Wind 20ft/early(mph) SE 18 G23 E 16 G19 SE 12 G17
Wind 20ft/late(mph) SE 18 G23 E 16 G19 SE 12 G17
Mixing Hgt(ft-agl/msl)4840 4770
Transport Wnd (mph) SE 17 E 12
Vent Rate (kt-ft) 72600 47700
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
VIZ001-290815-
Saint Thomas and Saint John-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 30 30
Temp (24h trend) 88 (+1) 76 (-3) 87
RH % (24h trend) 66 (-4) 96 (+5) 66
Wind 20ft/early(mph) SE 11 SE 11 E 11
Wind 20ft/late(mph) SE 11 SE 11 E 11
Mixing Hgt(ft-agl/msl)3360 3220
Transport Wnd (mph) SE 13 E 15
Vent Rate (kt-ft) 36960 41860
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-290815-
St Croix-
407 AM AST Thu Aug 28 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 30 30
Temp (24h trend) 90 (+2) 78 (-1) 90
RH % (24h trend) 64 (-4) 94 (+4) 64
Wind 20ft/early(mph) SE 10 E 9 E 11
Wind 20ft/late(mph) SE 10 E 9 E 11
Mixing Hgt(ft-agl/msl)4340 4520
Transport Wnd (mph) SE 13 E 14
Vent Rate (kt-ft) 47740 54240
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
$$