Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
144
FNCA52 TJSJ 290844
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
444 AM AST Fri Aug 29 2025
.DISCUSSION...
The overall fire weather threat remains low today, with any risk
expected to be of limited duration and spatial extent. Wind speeds
are expected to, in general, remain threshold values but could
still reach threshold values at times. Trailing moisture will
maintain RH values generally above threshold values. KBDI are at
576 in Cabo Rojo, 524 in Guanica, and 718 at St. Croix. Conditions
will continue to be monitored closely throughout the day for any
changes.
PRZ014-300845-
Southeast Coastal Plains-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 10 20
Temp (24h trend) 91 (+1) 73 (-3) 92
RH % (24h trend) 53 (-4) 96 (+6) 53
Wind 20ft/early(mph) SE 12 E 10 E 14 G20
Wind 20ft/late(mph) SE 12 E 10 E 14 G20
Mixing Hgt(ft-agl/msl)4570 4810
Transport Wnd (mph) E 8 E 13
Vent Rate (kt-ft) 31990 52910
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ015-300845-
Southern Hills-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 30 10 30
Temp (24h trend) 89 (+3) 70 (-4) 89
RH % (24h trend) 62 (-6) 100 (+6) 61
Wind 20ft/early(mph) E 9 E 9 E 11
Wind 20ft/late(mph) E 9 E 9 E 11
Mixing Hgt(ft-agl/msl)5330 5230
Transport Wnd (mph) E 7 E 12
Vent Rate (kt-ft) 31980 52300
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-300845-
North Coastal Plains-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 50 30 20
Temp (24h trend) 91 (0) 74 (-2) 91
RH % (24h trend) 64 (-1) 100 (+5) 63
Wind 20ft/early(mph) E 11 E 10 E 14 G17
Wind 20ft/late(mph) E 11 E 10 E 14 G17
Mixing Hgt(ft-agl/msl)4590 4530
Transport Wnd (mph) E 7 E 12
Vent Rate (kt-ft) 27540 45300
Dispersion 5 5
DSI 5 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-300845-
Northern Hills-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 60 10 50
Temp (24h trend) 89 (0) 71 (-2) 89
RH % (24h trend) 66 (0) 100 (+3) 65
Wind 20ft/early(mph) E 9 E 5 NE 12
Wind 20ft/late(mph) E 9 E 5 NE 12
Mixing Hgt(ft-agl/msl)5300 5310
Transport Wnd (mph) E 3 E 9
Vent Rate (kt-ft) 15900 42480
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ018-300845-
West Coast-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms None Tstms
Chance Precip (%) 40 0 60
Temp (24h trend) 92 (+1) 72 (-3) 91
RH % (24h trend) 60 (-5) 100 (+4) 62
Wind 20ft/early(mph) E 6 E 8 E 11
Wind 20ft/late(mph) E 6 E 8 E 11
Mixing Hgt(ft-agl/msl)4400 4440
Transport Wnd (mph) E 5 SE 7
Vent Rate (kt-ft) 17600 26640
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-300845-
Eastern Interior-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 30 40
Temp (24h trend) 90 (+2) 71 (-4) 90
RH % (24h trend) 62 (-3) 100 (+4) 61
Wind 20ft/early(mph) E 10 E 9 E 11
Wind 20ft/late(mph) E 10 E 9 E 11
Mixing Hgt(ft-agl/msl)5650 5670
Transport Wnd (mph) SE 8 E 12
Vent Rate (kt-ft) 39550 56700
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-300845-
Luquillo Mountain Range-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 40 40
Temp (24h trend) 86 (+4) 69 (-4) 86
RH % (24h trend) 68 (-5) 100 (+1) 65
Wind 20ft/early(mph) E 9 E 8 E 10
Wind 20ft/late(mph) E 9 E 8 E 10
Mixing Hgt(ft-agl/msl)4230 4440
Transport Wnd (mph) SE 10 E 12
Vent Rate (kt-ft) 38070 44400
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-300845-
Central Mountain Range-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 50 10 60
Temp (24h trend) 87 (+4) 68 (-4) 87
RH % (24h trend) 66 (-5) 100 (+3) 67
Wind 20ft/early(mph) E 5 E 5 E 6
Wind 20ft/late(mph) E 5 E 5 E 6
Mixing Hgt(ft-agl/msl)6390 6000
Transport Wnd (mph) E 3 E 8
Vent Rate (kt-ft) 19170 42000
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-300845-
Cayey Mountain Range-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 20 30
Temp (24h trend) 86 (+2) 70 (-3) 86
RH % (24h trend) 66 (-4) 100 (0) 63
Wind 20ft/early(mph) E 8 E 6 E 10
Wind 20ft/late(mph) E 8 E 6 E 10
Mixing Hgt(ft-agl/msl)5110 5370
Transport Wnd (mph) E 9 E 12
Vent Rate (kt-ft) 40880 53700
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ025-300845-
Vieques-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 50 40
Temp (24h trend) 90 (+1) 77 (-2) 90
RH % (24h trend) 60 (-4) 93 (+2) 58
Wind 20ft/early(mph) E 11 E 12 E 11
Wind 20ft/late(mph) E 11 E 12 E 11
Mixing Hgt(ft-agl/msl)3170 3300
Transport Wnd (mph) E 13 E 14
Vent Rate (kt-ft) 34870 39600
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-300845-
Culebra-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 50 30
Temp (24h trend) 92 (+2) 78 (-2) 91
RH % (24h trend) 60 (-6) 95 (+3) 60
Wind 20ft/early(mph) E 11 E 12 E 11
Wind 20ft/late(mph) E 11 E 12 E 11
Mixing Hgt(ft-agl/msl)3270 3000
Transport Wnd (mph) E 13 E 14
Vent Rate (kt-ft) 35970 36000
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-300845-
Southwest Coastal Plains and Mona Island-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers Showers Tstms
Chance Precip (%) 30 10 30
Temp (24h trend) 93 (+2) 74 (-3) 93
RH % (24h trend) 52 (-5) 95 (+6) 53
Wind 20ft/early(mph) E 10 E 10 SE 16 G21
Wind 20ft/late(mph) E 10 E 10 SE 16 G21
Mixing Hgt(ft-agl/msl)4830 4680
Transport Wnd (mph) E 8 E 14
Vent Rate (kt-ft) 33810 56160
Dispersion 5 5
DSI 6 3 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-300845-
Saint Thomas and Saint John-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Mclear Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 10 50 30
Temp (24h trend) 87 (+1) 76 (-3) 88
RH % (24h trend) 67 (-4) 96 (+3) 64
Wind 20ft/early(mph) E 11 E 13 G17 E 11
Wind 20ft/late(mph) E 11 E 13 G17 E 11
Mixing Hgt(ft-agl/msl)3220 3030
Transport Wnd (mph) E 13 E 13
Vent Rate (kt-ft) 35420 33330
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-300845-
St Croix-
444 AM AST Fri Aug 29 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 50 30
Temp (24h trend) 90 (+2) 77 (-3) 90
RH % (24h trend) 64 (-5) 94 (+2) 64
Wind 20ft/early(mph) E 11 E 12 E 12
Wind 20ft/late(mph) E 11 E 12 E 12
Mixing Hgt(ft-agl/msl)4410 4360
Transport Wnd (mph) E 14 E 13
Vent Rate (kt-ft) 52920 47960
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$