Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
Versions:
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FNCA52 TJSJ 130901
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
501 AM AST Fri Jun 13 2025
.DISCUSSION...
Today`s weather conditions are expected to remain largely
unchanged, with southern Puerto Rico still experiencing very dry
conditions, elevated Keetch-Byram Drought Index (KBDI) values, and
significant to critical rainfall deficits over the past 30 to 60
days. Breezy to locally windy conditions, combined with low
humidity, will continue to create an environment favorable for the
rapid spread of fires. Fire danger activity has increased in
recent days, and today`s forecast supports another prolonged
period of elevated fire weather, prompting the issuance of a Fire
Danger Statement for the southern coastal plains and hills of
Puerto Rico.
The ongoing drying trend, along with continued breezy to windy
conditions, is expected to persist through Saturday. Residents and
land management officials should remain alert and take all
necessary precautions. For full details, please refer to the
latest Fire Danger Statement (RFDSJU).
PRZ014-141000-
Southeast Coastal Plains-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 10 30
Temp (24h trend) 91 (+2) 72 (-2) 90
RH % (24h trend) 48 (-5) 87 (+2) 46
Wind 20ft/early(mph) E 18 G24 E 14 G20 E 18 G24
Wind 20ft/late(mph) E 18 G24 E 14 G20 E 18 G24
Mixing Hgt(ft-agl/msl)5340 5500
Transport Wnd (mph) E 16 E 17
Vent Rate (kt-ft) 74760 82500
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ015-141000-
Southern Hills-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 10 30
Temp (24h trend) 87 (+3) 68 (-4) 86
RH % (24h trend) 56 (-9) 95 (+5) 57
Wind 20ft/early(mph) E 13 E 12 E 14
Wind 20ft/late(mph) E 13 E 12 E 14
Mixing Hgt(ft-agl/msl)5880 5820
Transport Wnd (mph) E 15 E 15
Vent Rate (kt-ft) 76440 75660
Dispersion 5 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ016-141000-
North Coastal Plains-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 10 40
Temp (24h trend) 89 (+1) 72 (-2) 89
RH % (24h trend) 60 (-6) 94 (0) 60
Wind 20ft/early(mph) E 20 E 18 E 19 G22
Wind 20ft/late(mph) E 20 E 18 E 19 G22
Mixing Hgt(ft-agl/msl)4910 5040
Transport Wnd (mph) E 17 E 17
Vent Rate (kt-ft) 73650 75600
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-141000-
Northern Hills-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers None Showers
Chance Precip (%) 30 0 30
Temp (24h trend) 86 (+1) 69 (-3) 85
RH % (24h trend) 64 (-4) 97 (0) 64
Wind 20ft/early(mph) E 17 E 16 E 17
Wind 20ft/late(mph) E 17 E 16 E 17
Mixing Hgt(ft-agl/msl)5470 5650
Transport Wnd (mph) E 14 E 14
Vent Rate (kt-ft) 65640 67800
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ018-141000-
West Coast-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms None Tstms
Chance Precip (%) 70 0 60
Temp (24h trend) 90 (0) 70 (-2) 89
RH % (24h trend) 57 (-5) 96 (+3) 57
Wind 20ft/early(mph) E 14 E 16 E 14
Wind 20ft/late(mph) E 14 E 16 E 14
Mixing Hgt(ft-agl/msl)5240 4900
Transport Wnd (mph) E 10 E 9
Vent Rate (kt-ft) 47160 39200
Dispersion 5 5
DSI 6 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-141000-
Eastern Interior-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 20 50
Temp (24h trend) 87 (+2) 70 (-3) 86
RH % (24h trend) 62 (-4) 94 (0) 62
Wind 20ft/early(mph) E 14 E 12 E 13
Wind 20ft/late(mph) E 14 E 12 E 13
Mixing Hgt(ft-agl/msl)5500 5730
Transport Wnd (mph) E 16 E 15
Vent Rate (kt-ft) 77000 74490
Dispersion 5 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ022-141000-
Luquillo Mountain Range-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 50 40 50
Temp (24h trend) 81 (+2) 68 (-3) 81
RH % (24h trend) 71 (-5) 98 (+1) 71
Wind 20ft/early(mph) E 12 E 11 E 12
Wind 20ft/late(mph) E 12 E 11 E 12
Mixing Hgt(ft-agl/msl)4070 4710
Transport Wnd (mph) E 17 E 16
Vent Rate (kt-ft) 61050 65940
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-141000-
Central Mountain Range-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms None Tstms
Chance Precip (%) 50 0 50
Temp (24h trend) 84 (+2) 66 (-3) 84
RH % (24h trend) 62 (-7) 98 (+2) 64
Wind 20ft/early(mph) E 12 E 11 E 11
Wind 20ft/late(mph) E 12 E 11 E 11
Mixing Hgt(ft-agl/msl)6310 6920
Transport Wnd (mph) E 12 E 9
Vent Rate (kt-ft) 63100 55360
Dispersion 5 5
DSI 6 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-141000-
Cayey Mountain Range-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 30 30
Temp (24h trend) 82 (+2) 69 (-2) 81
RH % (24h trend) 68 (-6) 97 (-1) 68
Wind 20ft/early(mph) E 12 E 11 E 12
Wind 20ft/late(mph) E 12 E 11 E 12
Mixing Hgt(ft-agl/msl)4550 5200
Transport Wnd (mph) E 17 E 17
Vent Rate (kt-ft) 68250 78000
Dispersion 5 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ025-141000-
Vieques-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 30 30
Temp (24h trend) 87 (+1) 75 (-1) 87
RH % (24h trend) 61 (-5) 85 (-2) 60
Wind 20ft/early(mph) E 17 G21 E 16 G20 E 16 G19
Wind 20ft/late(mph) E 17 G21 E 16 G20 E 16 G19
Mixing Hgt(ft-agl/msl)3630 3770
Transport Wnd (mph) E 20 E 20
Vent Rate (kt-ft) 61710 64090
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-141000-
Culebra-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 30 40
Temp (24h trend) 89 (+2) 76 (-1) 89
RH % (24h trend) 59 (-7) 88 (+1) 58
Wind 20ft/early(mph) E 17 G21 E 17 G21 E 16 G20
Wind 20ft/late(mph) E 17 G21 E 17 G21 E 16 G20
Mixing Hgt(ft-agl/msl)3510 3700
Transport Wnd (mph) E 20 E 21
Vent Rate (kt-ft) 59670 66600
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-141000-
Southwest Coastal Plains and Mona Island-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers None Showers
Chance Precip (%) 40 0 40
Temp (24h trend) 92 (+2) 72 (-2) 91
RH % (24h trend) 47 (-7) 86 (+2) 47
Wind 20ft/early(mph) E 20 G27 E 14 G18 E 20 G27
Wind 20ft/late(mph) E 20 G27 E 14 G18 E 20 G27
Mixing Hgt(ft-agl/msl)5590 5720
Transport Wnd (mph) E 16 E 15
Vent Rate (kt-ft) 78260 74360
Dispersion 5 5
DSI 6 4 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-141000-
Saint Thomas and Saint John-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Mclear Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 20 40
Temp (24h trend) 86 (+1) 75 (-2) 86
RH % (24h trend) 62 (-6) 89 (+2) 62
Wind 20ft/early(mph) E 17 G21 E 17 G21 E 16 G20
Wind 20ft/late(mph) E 17 G21 E 17 G21 E 16 G20
Mixing Hgt(ft-agl/msl)3540 3730
Transport Wnd (mph) E 18 E 20
Vent Rate (kt-ft) 56640 63410
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-141000-
St Croix-
501 AM AST Fri Jun 13 2025
Today Tonight Sat
Cloud Cover Mclear Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 10 10 20
Temp (24h trend) 87 (+1) 75 (-2) 87
RH % (24h trend) 62 (-6) 86 (+1) 61
Wind 20ft/early(mph) E 17 G21 E 16 G19 E 16 G19
Wind 20ft/late(mph) E 17 G21 E 16 G19 E 16 G19
Mixing Hgt(ft-agl/msl)4410 4560
Transport Wnd (mph) E 20 E 21
Vent Rate (kt-ft) 74970 82080
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$