Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
623
FNCA52 TJSJ 210926
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
526 AM AST Sat Jun 21 2025
.DISCUSSION...
The KBDI remains above critical(>550) fire weather conditions
across southern Puerto Rico. Wind speeds are forecast once again
to exceed 15 mph across the southern coastal plains of PR.
However, the relative humidity might not necessarily reach
critical levels as afternoon showers are expected to develop over
portions of the southwestern quadrant of PR. Therefore, there is a
low to elevated fire danger potential today. Having said that, we
will continue to monitor the weather conditions in case a Fire
Danger Statement is needed. Drier conditions are expected on Sunday.
PRZ014-220930-
Southeast Coastal Plains-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 50 30 10
Temp (24h trend) 90 (+1) 73 (-3) 92
RH % (24h trend) 54 (-11) 91 (+3) 46
Wind 20ft/early(mph) E 19 G25 E 11 E 16 G21
Wind 20ft/late(mph) E 19 G25 E 11 E 16 G21
Mixing Hgt(ft-agl/msl)4770 5290
Transport Wnd (mph) E 16 E 14
Vent Rate (kt-ft) 66780 63480
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ015-220930-
Southern Hills-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Mclear
Precip Type Tstms Showers Showers
Chance Precip (%) 60 30 10
Temp (24h trend) 86 (+3) 69 (-4) 87
RH % (24h trend) 63 (-9) 99 (+7) 58
Wind 20ft/early(mph) E 14 E 10 E 12
Wind 20ft/late(mph) E 14 E 10 E 12
Mixing Hgt(ft-agl/msl)5590 6090
Transport Wnd (mph) E 15 E 12
Vent Rate (kt-ft) 72670 60900
Dispersion 5 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ016-220930-
North Coastal Plains-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 40 30 30
Temp (24h trend) 89 (+1) 72 (-3) 89
RH % (24h trend) 65 (-5) 99 (+4) 63
Wind 20ft/early(mph) E 18 G21 E 14 E 19 G22
Wind 20ft/late(mph) E 18 G21 E 14 E 19 G22
Mixing Hgt(ft-agl/msl)4550 5140
Transport Wnd (mph) E 16 E 12
Vent Rate (kt-ft) 63700 51400
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-220930-
Northern Hills-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 70 50 50
Temp (24h trend) 86 (+1) 70 (-3) 86
RH % (24h trend) 70 (-2) 100 (+3) 66
Wind 20ft/early(mph) E 16 E 12 NE 16
Wind 20ft/late(mph) E 16 E 12 NE 16
Mixing Hgt(ft-agl/msl)5410 6120
Transport Wnd (mph) E 13 E 9
Vent Rate (kt-ft) 59510 48960
Dispersion 5 5
DSI 6 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ018-220930-
West Coast-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 70 40 40
Temp (24h trend) 90 (+1) 70 (-3) 90
RH % (24h trend) 62 (-6) 100 (+4) 59
Wind 20ft/early(mph) E 13 E 11 E 12
Wind 20ft/late(mph) E 13 E 11 E 12
Mixing Hgt(ft-agl/msl)4760 5160
Transport Wnd (mph) E 9 E 8
Vent Rate (kt-ft) 38080 36120
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-220930-
Eastern Interior-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 60 30
Temp (24h trend) 87 (+2) 70 (-4) 88
RH % (24h trend) 66 (-5) 99 (+4) 61
Wind 20ft/early(mph) E 14 E 11 E 12
Wind 20ft/late(mph) E 14 E 11 E 12
Mixing Hgt(ft-agl/msl)4880 6160
Transport Wnd (mph) E 16 E 13
Vent Rate (kt-ft) 68320 67760
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ022-220930-
Luquillo Mountain Range-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 60 30
Temp (24h trend) 82 (+3) 68 (-4) 82
RH % (24h trend) 74 (-7) 100 (+2) 71
Wind 20ft/early(mph) E 12 E 9 E 10
Wind 20ft/late(mph) E 12 E 9 E 10
Mixing Hgt(ft-agl/msl)3940 4160
Transport Wnd (mph) E 15 E 13
Vent Rate (kt-ft) 51220 45760
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-220930-
Central Mountain Range-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 70 50 30
Temp (24h trend) 85 (+4) 66 (-4) 84
RH % (24h trend) 69 (-7) 100 (+3) 66
Wind 20ft/early(mph) E 11 E 8 E 9
Wind 20ft/late(mph) E 11 E 8 E 9
Mixing Hgt(ft-agl/msl)6220 7630
Transport Wnd (mph) E 10 E 7
Vent Rate (kt-ft) 55980 45780
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-220930-
Cayey Mountain Range-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 60 30
Temp (24h trend) 82 (+2) 69 (-3) 83
RH % (24h trend) 74 (-5) 100 (+1) 68
Wind 20ft/early(mph) E 12 E 9 E 10
Wind 20ft/late(mph) E 12 E 9 E 10
Mixing Hgt(ft-agl/msl)4050 4960
Transport Wnd (mph) E 17 E 13
Vent Rate (kt-ft) 60750 54560
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ025-220930-
Vieques-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 50 20
Temp (24h trend) 87 (+1) 76 (-1) 87
RH % (24h trend) 63 (-4) 89 (-3) 63
Wind 20ft/early(mph) E 17 G21 E 14 G19 E 14 G17
Wind 20ft/late(mph) E 17 G21 E 14 G19 E 14 G17
Mixing Hgt(ft-agl/msl)3390 3470
Transport Wnd (mph) E 17 E 16
Vent Rate (kt-ft) 50850 48580
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-220930-
Culebra-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 40 20
Temp (24h trend) 89 (+1) 76 (-2) 89
RH % (24h trend) 62 (-6) 93 (+2) 62
Wind 20ft/early(mph) E 16 G20 E 16 G19 E 14 G18
Wind 20ft/late(mph) E 16 G20 E 16 G19 E 14 G18
Mixing Hgt(ft-agl/msl)3400 3430
Transport Wnd (mph) E 16 E 16
Vent Rate (kt-ft) 47600 48020
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-220930-
Southwest Coastal Plains and Mona Island-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 40 30 10
Temp (24h trend) 91 (+2) 73 (-3) 91
RH % (24h trend) 54 (-10) 88 (+2) 47
Wind 20ft/early(mph) SE 19 G24 E 16 G20 SE 18 G23
Wind 20ft/late(mph) SE 19 G24 E 16 G20 SE 18 G23
Mixing Hgt(ft-agl/msl)5320 5760
Transport Wnd (mph) E 16 E 12
Vent Rate (kt-ft) 74480 57600
Dispersion 5 5
DSI 6 4 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-220930-
Saint Thomas and Saint John-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 40 20
Temp (24h trend) 86 (+1) 75 (-3) 86
RH % (24h trend) 66 (-6) 93 (+1) 67
Wind 20ft/early(mph) E 16 G20 E 16 G20 E 14 G18
Wind 20ft/late(mph) E 16 G20 E 16 G20 E 14 G18
Mixing Hgt(ft-agl/msl)3370 3340
Transport Wnd (mph) E 16 E 17
Vent Rate (kt-ft) 47180 50100
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-220930-
St Croix-
526 AM AST Sat Jun 21 2025
Today Tonight Sun
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 20 20
Temp (24h trend) 87 (+1) 76 (-2) 87
RH % (24h trend) 66 (-5) 91 (-1) 63
Wind 20ft/early(mph) E 16 G20 E 14 G17 E 14 G18
Wind 20ft/late(mph) E 16 G20 E 14 G17 E 14 G18
Mixing Hgt(ft-agl/msl)4360 4270
Transport Wnd (mph) E 21 E 17
Vent Rate (kt-ft) 78480 64050
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$