Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
958
FNCA52 TJSJ 090908
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
508 AM AST Sat Aug 9 2025
.DISCUSSION...
Typical seasonal weather conditions are expected across the
region. Showers are expected to move from time to time over
portions of the USVI and eastern Puerto Rico in the morning,
followed by afternoon convective activity over western Puerto
Rico. RH values across southern PR may drop into the mid 50s,
but winds will be mainly from the east and are expected to
remain below 15 mph with some occasional higher gusts along
coastal areas. At this time, the fire danger remains low,
however, we will continue to monitor the conditions closely.
PRZ014-100915-
Southeast Coastal Plains-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 60 40 30
Temp (24h trend) 91 (0) 73 (-2) 91
RH % (24h trend) 54 (-4) 94 (+4) 57
Wind 20ft/early(mph) SE 13 G18 E 10 SE 14 G20
Wind 20ft/late(mph) SE 13 G18 E 10 SE 14 G20
Mixing Hgt(ft-agl/msl)4810 5010
Transport Wnd (mph) E 10 E 13
Vent Rate (kt-ft) 43290 55110
Dispersion 5 5
DSI 5 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ015-100915-
Southern Hills-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Showers
Chance Precip (%) 50 50 20
Temp (24h trend) 87 (0) 70 (-3) 87
RH % (24h trend) 61 (0) 99 (+6) 62
Wind 20ft/early(mph) SE 10 E 9 SE 11
Wind 20ft/late(mph) SE 10 E 9 SE 11
Mixing Hgt(ft-agl/msl)5600 5720
Transport Wnd (mph) E 8 E 10
Vent Rate (kt-ft) 39200 51480
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-100915-
North Coastal Plains-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 60 50 40
Temp (24h trend) 89 (-1) 73 (-2) 90
RH % (24h trend) 64 (0) 99 (+3) 62
Wind 20ft/early(mph) E 14 E 12 E 17 G19
Wind 20ft/late(mph) E 14 E 12 E 17 G19
Mixing Hgt(ft-agl/msl)5020 5320
Transport Wnd (mph) E 9 E 12
Vent Rate (kt-ft) 40160 53200
Dispersion 5 5
DSI 6 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ017-100915-
Northern Hills-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 90 70 60
Temp (24h trend) 88 (0) 70 (-3) 88
RH % (24h trend) 67 (+3) 100 (+1) 66
Wind 20ft/early(mph) E 12 E 10 E 14
Wind 20ft/late(mph) E 12 E 10 E 14
Mixing Hgt(ft-agl/msl)5430 5770
Transport Wnd (mph) E 7 E 8
Vent Rate (kt-ft) 32580 40390
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ018-100915-
West Coast-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 70 40 40
Temp (24h trend) 91 (0) 71 (-2) 91
RH % (24h trend) 61 (-1) 99 (+3) 62
Wind 20ft/early(mph) NE 9 E 11 E 10
Wind 20ft/late(mph) NE 9 E 11 E 10
Mixing Hgt(ft-agl/msl)4860 4790
Transport Wnd (mph) E 5 E 8
Vent Rate (kt-ft) 19440 33530
Dispersion 5 5
DSI 5 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-100915-
Eastern Interior-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 50 40
Temp (24h trend) 88 (0) 71 (-3) 89
RH % (24h trend) 63 (+1) 99 (+2) 61
Wind 20ft/early(mph) E 11 E 9 E 12
Wind 20ft/late(mph) E 11 E 9 E 12
Mixing Hgt(ft-agl/msl)6260 6840
Transport Wnd (mph) E 9 E 12
Vent Rate (kt-ft) 50080 68400
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-100915-
Luquillo Mountain Range-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Mcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 60 50
Temp (24h trend) 84 (+2) 68 (-4) 85
RH % (24h trend) 70 (-1) 100 (+1) 69
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)4720 4720
Transport Wnd (mph) E 9 E 12
Vent Rate (kt-ft) 37760 47200
Dispersion 5 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-100915-
Central Mountain Range-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 90 70 50
Temp (24h trend) 85 (+1) 67 (-3) 85
RH % (24h trend) 69 (+2) 99 (+1) 67
Wind 20ft/early(mph) SE 6 E 8 E 9
Wind 20ft/late(mph) SE 6 E 8 E 9
Mixing Hgt(ft-agl/msl)6000 6430
Transport Wnd (mph) E 6 E 8
Vent Rate (kt-ft) 30000 45010
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-100915-
Cayey Mountain Range-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Mcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 60 60 50
Temp (24h trend) 84 (0) 69 (-2) 84
RH % (24h trend) 67 (+2) 100 (+1) 66
Wind 20ft/early(mph) SE 9 E 8 E 10
Wind 20ft/late(mph) SE 9 E 8 E 10
Mixing Hgt(ft-agl/msl)5380 5540
Transport Wnd (mph) E 9 E 12
Vent Rate (kt-ft) 43040 55400
Dispersion 5 5
DSI 5 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ025-100915-
Vieques-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Mcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 60 50
Temp (24h trend) 89 (0) 77 (-1) 89
RH % (24h trend) 59 (-1) 90 (+1) 59
Wind 20ft/early(mph) E 9 E 11 E 12
Wind 20ft/late(mph) E 9 E 11 E 12
Mixing Hgt(ft-agl/msl)3330 3430
Transport Wnd (mph) E 12 E 15
Vent Rate (kt-ft) 33300 44590
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-100915-
Culebra-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Mcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 60 50
Temp (24h trend) 90 (+1) 77 (-1) 91
RH % (24h trend) 60 (-4) 91 (+1) 59
Wind 20ft/early(mph) E 9 E 11 E 11
Wind 20ft/late(mph) E 9 E 11 E 11
Mixing Hgt(ft-agl/msl)3470 3490
Transport Wnd (mph) E 10 E 15
Vent Rate (kt-ft) 31230 45370
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-100915-
Southwest Coastal Plains and Mona Island-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 20 30 20
Temp (24h trend) 91 (0) 74 (-2) 91
RH % (24h trend) 54 (-4) 91 (+4) 56
Wind 20ft/early(mph) SE 13 G18 E 12 SE 14 G20
Wind 20ft/late(mph) SE 13 G18 E 12 SE 14 G20
Mixing Hgt(ft-agl/msl)5160 4700
Transport Wnd (mph) E 10 E 14
Vent Rate (kt-ft) 46440 56400
Dispersion 5 5
DSI 5 4 6
RH Recovery Excellent
Remarks...None.
$$
VIZ001-100915-
Saint Thomas and Saint John-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Mcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 60 50
Temp (24h trend) 86 (0) 76 (-3) 87
RH % (24h trend) 65 (-3) 94 (+5) 65
Wind 20ft/early(mph) E 10 E 12 E 12
Wind 20ft/late(mph) E 10 E 12 E 12
Mixing Hgt(ft-agl/msl)3430 3470
Transport Wnd (mph) E 13 E 15
Vent Rate (kt-ft) 37730 45110
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-100915-
St Croix-
508 AM AST Sat Aug 9 2025
Today Tonight Sun
Cloud Cover Pcldy Mcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 60 50
Temp (24h trend) 87 (-1) 76 (-3) 89
RH % (24h trend) 66 (0) 92 (+4) 63
Wind 20ft/early(mph) E 10 E 11 E 12
Wind 20ft/late(mph) E 10 E 11 E 12
Mixing Hgt(ft-agl/msl)4680 4830
Transport Wnd (mph) E 12 E 13
Vent Rate (kt-ft) 46800 53130
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$