Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
008
FNCA52 TJSJ 080850
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
450 AM AST Mon Sep 8 2025
.DISCUSSION...
Expect winds from the east to east-southeast at 9 to 16 mph with
gusts at 15 to 20 mph across the forecast area today. Although,
Humidity will remain above 50 percent as tropical moisture pool
over the islands; however, KDBI values across S PR and Saint
Croix are above the threshold values. These factors are
contributing to a low fire danger risk.
PRZ014-090900-
Southeast Coastal Plains-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers None Showers
Chance Precip (%) 50 0 10
Temp (24h trend) 89 (-1) 73 (-3) 91
RH % (24h trend) 55 (-1) 91 (+3) 51
Wind 20ft/early(mph) E 12 E 10 SE 11
Wind 20ft/late(mph) E 12 E 10 SE 11
Mixing Hgt(ft-agl/msl)4420 4390
Transport Wnd (mph) SE 13 SE 12
Vent Rate (kt-ft) 48620 43900
Dispersion 5 5
DSI 6 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ015-090900-
Southern Hills-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Pcldy Mclear Mclear
Precip Type Tstms Showers Showers
Chance Precip (%) 50 10 10
Temp (24h trend) 85 (0) 69 (-4) 87
RH % (24h trend) 66 (-2) 99 (+6) 60
Wind 20ft/early(mph) SE 10 E 10 SE 10
Wind 20ft/late(mph) SE 10 E 10 SE 10
Mixing Hgt(ft-agl/msl)4980 4930
Transport Wnd (mph) SE 13 SE 12
Vent Rate (kt-ft) 54780 49300
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-090900-
North Coastal Plains-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Mcldy Mclear Mclear
Precip Type Tstms Showers Showers
Chance Precip (%) 70 10 10
Temp (24h trend) 89 (-1) 73 (-3) 90
RH % (24h trend) 66 (-2) 99 (+5) 64
Wind 20ft/early(mph) E 12 SE 10 E 10
Wind 20ft/late(mph) E 12 SE 10 E 10
Mixing Hgt(ft-agl/msl)4480 4510
Transport Wnd (mph) SE 12 E 10
Vent Rate (kt-ft) 44800 40590
Dispersion 5 5
DSI 6 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ017-090900-
Northern Hills-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Mcldy Mclear Mclear
Precip Type Tstms Showers Showers
Chance Precip (%) 80 10 60
Temp (24h trend) 88 (0) 70 (-3) 88
RH % (24h trend) 67 (-1) 100 (+3) 63
Wind 20ft/early(mph) E 10 E 8 E 9
Wind 20ft/late(mph) E 10 E 8 E 9
Mixing Hgt(ft-agl/msl)5070 5330
Transport Wnd (mph) SE 9 E 8
Vent Rate (kt-ft) 40560 37310
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ018-090900-
West Coast-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Pcldy Pcldy Mclear
Precip Type Tstms Tstms Showers
Chance Precip (%) 50 50 50
Temp (24h trend) 90 (-1) 72 (-2) 91
RH % (24h trend) 64 (-1) 100 (+4) 58
Wind 20ft/early(mph) E 12 E 11 SE 11
Wind 20ft/late(mph) E 12 E 11 SE 11
Mixing Hgt(ft-agl/msl)4710 4560
Transport Wnd (mph) SE 13 SE 9
Vent Rate (kt-ft) 51810 36480
Dispersion 5 5
DSI 6 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-090900-
Eastern Interior-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Mcldy Mclear Mclear
Precip Type Tstms Showers Showers
Chance Precip (%) 60 20 10
Temp (24h trend) 88 (+1) 70 (-4) 89
RH % (24h trend) 67 (0) 100 (+3) 63
Wind 20ft/early(mph) SE 12 E 11 SE 8
Wind 20ft/late(mph) SE 12 E 11 SE 8
Mixing Hgt(ft-agl/msl)4990 5020
Transport Wnd (mph) SE 13 SE 9
Vent Rate (kt-ft) 54890 40160
Dispersion 5 5
DSI 6 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-090900-
Luquillo Mountain Range-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Mcldy Mclear Mclear
Precip Type Tstms Showers Showers
Chance Precip (%) 60 20 10
Temp (24h trend) 83 (+2) 69 (-3) 85
RH % (24h trend) 73 (-3) 100 (+1) 68
Wind 20ft/early(mph) SE 10 E 9 SE 8
Wind 20ft/late(mph) SE 10 E 9 SE 8
Mixing Hgt(ft-agl/msl)3630 4020
Transport Wnd (mph) SE 15 SE 9
Vent Rate (kt-ft) 47190 32160
Dispersion 5 5
DSI 6 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ023-090900-
Central Mountain Range-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Pcldy Mclear Mclear
Precip Type Tstms Showers Tstms
Chance Precip (%) 70 20 60
Temp (24h trend) 85 (+2) 67 (-4) 86
RH % (24h trend) 68 (-4) 100 (+4) 62
Wind 20ft/early(mph) SE 9 E 5 SE 8
Wind 20ft/late(mph) SE 9 E 5 SE 8
Mixing Hgt(ft-agl/msl)5380 6090
Transport Wnd (mph) SE 10 SE 8
Vent Rate (kt-ft) 48420 42630
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-090900-
Cayey Mountain Range-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Mcldy Mclear Mclear
Precip Type Tstms Showers Showers
Chance Precip (%) 60 10 10
Temp (24h trend) 82 (-1) 69 (-3) 85
RH % (24h trend) 72 (0) 100 (+1) 66
Wind 20ft/early(mph) SE 10 E 9 SE 8
Wind 20ft/late(mph) SE 10 E 9 SE 8
Mixing Hgt(ft-agl/msl)4410 4690
Transport Wnd (mph) SE 15 SE 9
Vent Rate (kt-ft) 57330 37520
Dispersion 5 5
DSI 6 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ025-090900-
Vieques-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Pcldy Mclear Mclear
Precip Type Tstms Showers Showers
Chance Precip (%) 40 20 10
Temp (24h trend) 89 (0) 77 (-1) 89
RH % (24h trend) 60 (-2) 92 (0) 59
Wind 20ft/early(mph) SE 13 E 13 G17 SE 11
Wind 20ft/late(mph) SE 13 E 13 G17 SE 11
Mixing Hgt(ft-agl/msl)3510 3630
Transport Wnd (mph) E 14 SE 13
Vent Rate (kt-ft) 42120 39930
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-090900-
Culebra-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 40 20 30
Temp (24h trend) 90 (0) 78 (-1) 91
RH % (24h trend) 59 (-6) 94 (+2) 60
Wind 20ft/early(mph) E 13 G17 E 13 G17 SE 11
Wind 20ft/late(mph) E 13 G17 E 13 G17 SE 11
Mixing Hgt(ft-agl/msl)3610 3810
Transport Wnd (mph) E 16 SE 14
Vent Rate (kt-ft) 50540 45720
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-090900-
Southwest Coastal Plains and Mona Island-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 30 40 10
Temp (24h trend) 91 (0) 74 (-3) 92
RH % (24h trend) 53 (-1) 94 (+6) 46
Wind 20ft/early(mph) E 16 G21 E 14 G18 SE 16 G21
Wind 20ft/late(mph) E 16 G21 E 14 G18 SE 16 G21
Mixing Hgt(ft-agl/msl)4680 4470
Transport Wnd (mph) SE 16 E 15
Vent Rate (kt-ft) 65520 58110
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
VIZ001-090900-
Saint Thomas and Saint John-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Mclear Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 40 20 40
Temp (24h trend) 89 (+2) 76 (-3) 89
RH % (24h trend) 61 (-9) 97 (+7) 62
Wind 20ft/early(mph) E 16 G19 E 13 G17 SE 11
Wind 20ft/late(mph) E 16 G19 E 13 G17 SE 11
Mixing Hgt(ft-agl/msl)3620 3540
Transport Wnd (mph) E 17 SE 14
Vent Rate (kt-ft) 54300 42480
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-090900-
St Croix-
450 AM AST Mon Sep 8 2025
Today Tonight Tue
Cloud Cover Pcldy Mclear Mclear
Precip Type Tstms Showers Showers
Chance Precip (%) 40 10 20
Temp (24h trend) 89 (0) 76 (-3) 90
RH % (24h trend) 63 (-4) 93 (+3) 62
Wind 20ft/early(mph) E 13 G17 E 12 SE 12
Wind 20ft/late(mph) E 13 G17 E 12 SE 12
Mixing Hgt(ft-agl/msl)4130 4510
Transport Wnd (mph) E 17 SE 13
Vent Rate (kt-ft) 61950 49610
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
$$