Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
970
FNCA52 TJSJ 090918
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
518 AM AST Sun Mar 9 2025
.DISCUSSION...
Similar conditions are expected today. RH values may drop below
critical thresholds for short periods of time mostly across
southeastern coastal plains today. However, light winds and
another showery weather afternoon will result in fire danger
conditions to remain outside of the critical thresholds for the
most part. Therefore, brief fire danger conditions can be
possible, but overall, a limited risk for fire danger threat are
forecast for today.
PRZ014-100930-
Southeast Coastal Plains-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 10 10 10
Temp (24h trend) 88 (+2) 69 (-2) 88
RH % (24h trend) 50 (-8) 90 (0) 49
Wind 20ft/early(mph) SE 11 G18 E 10 SE 12 G18
Wind 20ft/late(mph) SE 11 G18 E 10 SE 12 G18
Mixing Hgt(ft-agl/msl)4560 4580
Transport Wnd (mph) E 8 E 10
Vent Rate (kt-ft) 31920 41220
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ015-100930-
Southern Hills-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 10 10 10
Temp (24h trend) 84 (+3) 65 (-4) 84
RH % (24h trend) 62 (-8) 99 (+3) 60
Wind 20ft/early(mph) SE 10 E 8 SE 11
Wind 20ft/late(mph) SE 10 E 8 SE 11
Mixing Hgt(ft-agl/msl)5270 5410
Transport Wnd (mph) E 8 E 12
Vent Rate (kt-ft) 36890 54100
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-100930-
North Coastal Plains-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 10 10 10
Temp (24h trend) 86 (+1) 69 (-2) 87
RH % (24h trend) 63 (-7) 100 (+2) 61
Wind 20ft/early(mph) NE 11 E 11 E 14
Wind 20ft/late(mph) NE 11 E 11 E 14
Mixing Hgt(ft-agl/msl)4380 4380
Transport Wnd (mph) E 9 E 13
Vent Rate (kt-ft) 35040 48180
Dispersion 5 5
DSI 5 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ017-100930-
Northern Hills-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Mclear
Precip Type Showers None Showers
Chance Precip (%) 20 0 30
Temp (24h trend) 85 (+2) 67 (-2) 85
RH % (24h trend) 66 (-6) 100 (0) 63
Wind 20ft/early(mph) NE 10 E 10 E 12
Wind 20ft/late(mph) NE 10 E 10 E 12
Mixing Hgt(ft-agl/msl)5360 5710
Transport Wnd (mph) E 7 E 10
Vent Rate (kt-ft) 32160 51390
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ018-100930-
West Coast-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 20 30
Temp (24h trend) 87 (+1) 67 (-2) 87
RH % (24h trend) 61 (-7) 100 (+1) 60
Wind 20ft/early(mph) S 10 E 9 SE 12
Wind 20ft/late(mph) S 10 E 9 SE 12
Mixing Hgt(ft-agl/msl)4910 4970
Transport Wnd (mph) E 5 SE 8
Vent Rate (kt-ft) 19640 34790
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-100930-
Eastern Interior-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 10 20 20
Temp (24h trend) 85 (+2) 66 (-4) 84
RH % (24h trend) 63 (-6) 100 (+2) 62
Wind 20ft/early(mph) E 10 E 9 E 12
Wind 20ft/late(mph) E 10 E 9 E 12
Mixing Hgt(ft-agl/msl)4990 4640
Transport Wnd (mph) E 8 E 12
Vent Rate (kt-ft) 34930 46400
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ022-100930-
Luquillo Mountain Range-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 30 30 30
Temp (24h trend) 80 (+3) 65 (-3) 79
RH % (24h trend) 69 (-9) 100 (+2) 69
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)4800 3950
Transport Wnd (mph) E 9 SE 15
Vent Rate (kt-ft) 38400 51350
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ023-100930-
Central Mountain Range-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Pcldy
Precip Type Showers None Showers
Chance Precip (%) 30 0 40
Temp (24h trend) 82 (+3) 63 (-3) 82
RH % (24h trend) 65 (-9) 100 (0) 65
Wind 20ft/early(mph) E 6 E 8 SE 8
Wind 20ft/late(mph) E 6 E 8 SE 8
Mixing Hgt(ft-agl/msl)6080 6520
Transport Wnd (mph) E 6 SE 7
Vent Rate (kt-ft) 30400 39120
Dispersion 5 5
DSI 5 1 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-100930-
Cayey Mountain Range-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 10 20 30
Temp (24h trend) 80 (+2) 65 (-2) 80
RH % (24h trend) 69 (-6) 100 (0) 68
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)4930 3990
Transport Wnd (mph) E 9 E 13
Vent Rate (kt-ft) 39440 43890
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ025-100930-
Vieques-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 30 30 30
Temp (24h trend) 85 (0) 72 (-2) 85
RH % (24h trend) 60 (-4) 92 (+2) 59
Wind 20ft/early(mph) E 9 E 10 E 13 G17
Wind 20ft/late(mph) E 9 E 10 E 13 G17
Mixing Hgt(ft-agl/msl)3340 3790
Transport Wnd (mph) E 12 E 15
Vent Rate (kt-ft) 33400 49270
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-100930-
Culebra-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 20 30 30
Temp (24h trend) 85 (0) 73 (-2) 85
RH % (24h trend) 61 (-5) 91 (+4) 60
Wind 20ft/early(mph) E 9 E 10 E 13 G17
Wind 20ft/late(mph) E 9 E 10 E 13 G17
Mixing Hgt(ft-agl/msl)3230 3660
Transport Wnd (mph) E 10 E 17
Vent Rate (kt-ft) 29070 54900
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-100930-
Southwest Coastal Plains and Mona Island-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 20 10 20
Temp (24h trend) 89 (+3) 68 (-3) 88
RH % (24h trend) 48 (-7) 96 (+3) 47
Wind 20ft/early(mph) SE 12 G19 E 8 SE 14 G23
Wind 20ft/late(mph) SE 12 G19 E 8 SE 14 G23
Mixing Hgt(ft-agl/msl)5060 5100
Transport Wnd (mph) E 8 E 14
Vent Rate (kt-ft) 35420 61200
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-100930-
Saint Thomas and Saint John-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 10 20 30
Temp (24h trend) 85 (0) 71 (-3) 85
RH % (24h trend) 59 (-5) 94 (+5) 58
Wind 20ft/early(mph) E 9 E 10 E 14 G18
Wind 20ft/late(mph) E 9 E 10 E 14 G18
Mixing Hgt(ft-agl/msl)3220 3700
Transport Wnd (mph) E 10 E 18
Vent Rate (kt-ft) 28980 59200
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-100930-
St Croix-
518 AM AST Sun Mar 9 2025
Today Tonight Mon
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 10 10 10
Temp (24h trend) 85 (-1) 72 (-2) 85
RH % (24h trend) 60 (-4) 92 (+2) 57
Wind 20ft/early(mph) E 11 E 10 E 14 G17
Wind 20ft/late(mph) E 11 E 10 E 14 G17
Mixing Hgt(ft-agl/msl)4370 4440
Transport Wnd (mph) E 13 E 20
Vent Rate (kt-ft) 48070 75480
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$