Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
423
FNCA52 TJSJ 110827
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
427 AM AST Tue Nov 11 2025
.DISCUSSION...
Easterly surface winds will persist today at speeds up to 15
knots, with peak winds expected between 11 AM and 3 PM. Minimum
relative humidity values will range from the upper 40s to mid 50s during
the early morning hours, fluctuating as moisture patches move
across the islands. Given current KBDI conditions and the forecast
setup, the fire danger threat will remain low to moderate for
today.
PRZ014-120830-
Southeast Coastal Plains-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Mclear Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 40 40
Temp (24h trend) 89 (+2) 72 (-3) 91
RH % (24h trend) 55 (-9) 92 (+6) 46
Wind 20ft/early(mph) E 13 G18 NE 10 E 17 G22
Wind 20ft/late(mph) E 13 G18 NE 10 E 17 G22
Mixing Hgt(ft-agl/msl)4030 5130
Transport Wnd (mph) E 13 E 14
Vent Rate (kt-ft) 44330 61560
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ015-120830-
Southern Hills-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Mclear Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 10 10 30
Temp (24h trend) 87 (+4) 69 (-4) 87
RH % (24h trend) 59 (-7) 98 (+8) 58
Wind 20ft/early(mph) E 11 E 10 E 12
Wind 20ft/late(mph) E 11 E 10 E 12
Mixing Hgt(ft-agl/msl)4700 5560
Transport Wnd (mph) E 13 E 14
Vent Rate (kt-ft) 51700 66720
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-120830-
North Coastal Plains-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Mclear Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 10 40 40
Temp (24h trend) 90 (+2) 73 (-2) 88
RH % (24h trend) 62 (-2) 97 (+4) 62
Wind 20ft/early(mph) E 16 E 13 E 16
Wind 20ft/late(mph) E 16 E 13 E 16
Mixing Hgt(ft-agl/msl)4130 4340
Transport Wnd (mph) E 13 E 17
Vent Rate (kt-ft) 45430 65100
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-120830-
Northern Hills-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Mclear Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 20 20
Temp (24h trend) 88 (+1) 70 (-3) 87
RH % (24h trend) 60 (0) 97 (+4) 61
Wind 20ft/early(mph) E 13 E 11 NE 13
Wind 20ft/late(mph) E 13 E 11 NE 13
Mixing Hgt(ft-agl/msl)4980 4940
Transport Wnd (mph) E 10 E 16
Vent Rate (kt-ft) 44820 69160
Dispersion 5 5
DSI 5 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ018-120830-
West Coast-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 20 20 40
Temp (24h trend) 90 (+1) 70 (-3) 90
RH % (24h trend) 59 (-3) 97 (+5) 61
Wind 20ft/early(mph) E 12 E 12 E 16
Wind 20ft/late(mph) E 12 E 12 E 16
Mixing Hgt(ft-agl/msl)4190 4760
Transport Wnd (mph) E 9 E 10
Vent Rate (kt-ft) 33520 42840
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-120830-
Eastern Interior-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 40 50
Temp (24h trend) 88 (+4) 70 (-3) 87
RH % (24h trend) 63 (-5) 100 (+5) 62
Wind 20ft/early(mph) E 11 E 11 E 12
Wind 20ft/late(mph) E 11 E 11 E 12
Mixing Hgt(ft-agl/msl)4420 5020
Transport Wnd (mph) E 13 E 14
Vent Rate (kt-ft) 48620 60240
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-120830-
Luquillo Mountain Range-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 50 50
Temp (24h trend) 84 (+6) 68 (-3) 83
RH % (24h trend) 69 (-10) 100 (+2) 69
Wind 20ft/early(mph) E 9 E 9 E 10
Wind 20ft/late(mph) E 9 E 9 E 10
Mixing Hgt(ft-agl/msl)3630 4180
Transport Wnd (mph) E 14 E 15
Vent Rate (kt-ft) 43560 54340
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-120830-
Central Mountain Range-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Mclear Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 10 30
Temp (24h trend) 86 (+4) 67 (-3) 86
RH % (24h trend) 58 (-6) 98 (+5) 61
Wind 20ft/early(mph) E 8 E 8 NE 11
Wind 20ft/late(mph) E 8 E 8 NE 11
Mixing Hgt(ft-agl/msl)5930 5970
Transport Wnd (mph) E 8 E 14
Vent Rate (kt-ft) 41510 71640
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-120830-
Cayey Mountain Range-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 40 50
Temp (24h trend) 83 (+3) 68 (-3) 83
RH % (24h trend) 68 (-6) 100 (+2) 65
Wind 20ft/early(mph) E 9 E 8 E 11
Wind 20ft/late(mph) E 9 E 8 E 11
Mixing Hgt(ft-agl/msl)3810 4690
Transport Wnd (mph) E 14 NE 15
Vent Rate (kt-ft) 45720 60970
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ025-120830-
Vieques-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 50 50
Temp (24h trend) 88 (+2) 73 (-3) 88
RH % (24h trend) 62 (-6) 99 (+7) 60
Wind 20ft/early(mph) E 12 E 13 G17 E 14 G18
Wind 20ft/late(mph) E 12 E 13 G17 E 14 G18
Mixing Hgt(ft-agl/msl)3180 3410
Transport Wnd (mph) E 17 E 17
Vent Rate (kt-ft) 47700 51150
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-120830-
Culebra-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 50 50
Temp (24h trend) 90 (+3) 73 (-4) 90
RH % (24h trend) 61 (-7) 100 (+7) 59
Wind 20ft/early(mph) E 12 E 14 G18 E 14 G18
Wind 20ft/late(mph) E 12 E 14 G18 E 14 G18
Mixing Hgt(ft-agl/msl)3170 3340
Transport Wnd (mph) E 17 E 18
Vent Rate (kt-ft) 47550 53440
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-120830-
Southwest Coastal Plains and Mona Island-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Mclear Mclear Mclear
Precip Type None Showers Showers
Chance Precip (%) 0 20 30
Temp (24h trend) 91 (+3) 72 (-4) 91
RH % (24h trend) 52 (-9) 94 (+10) 48
Wind 20ft/early(mph) SE 17 G23 E 10 E 14 G19
Wind 20ft/late(mph) SE 17 G23 E 10 E 14 G19
Mixing Hgt(ft-agl/msl)4380 5370
Transport Wnd (mph) E 15 E 9
Vent Rate (kt-ft) 56940 42960
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-120830-
Saint Thomas and Saint John-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 50 50
Temp (24h trend) 86 (+1) 71 (-4) 86
RH % (24h trend) 68 (-4) 100 (+5) 66
Wind 20ft/early(mph) E 13 E 14 G19 E 14 G18
Wind 20ft/late(mph) E 13 E 14 G19 E 14 G18
Mixing Hgt(ft-agl/msl)3120 3350
Transport Wnd (mph) E 18 E 18
Vent Rate (kt-ft) 49920 53600
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-120830-
St Croix-
427 AM AST Tue Nov 11 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 40 40
Temp (24h trend) 89 (+1) 75 (-2) 89
RH % (24h trend) 65 (-2) 97 (+7) 63
Wind 20ft/early(mph) E 11 E 12 E 13 G17
Wind 20ft/late(mph) E 11 E 12 E 13 G17
Mixing Hgt(ft-agl/msl)3470 4100
Transport Wnd (mph) E 14 E 18
Vent Rate (kt-ft) 41640 65600
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$