Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
503
FNCA52 TJSJ 030906
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
506 AM AST Thu Apr 3 2025
.DISCUSSION...
Although most of the island has received above-normal rainfall
over the past month, smaller, fire-prone coastal regions continue
to observe below-normal precipitation. A dry slot will lead to
relative humidity values dropping to 40 to 45% across the southern
coastal plains, and possibly 50 to 55% across northwestern Puerto
Rico, an area with the lowest 30-day and 60-day percent of normal
rainfall. Combined with this dry air, windy conditions are expected
today, with easterly winds likely reaching up to 25 mph or higher,
and gusts potentially exceeding 30 mph. The KBDI was reported at
349 in Cabo Rojo and 628 in Guanica, indicating that areas with
dry vegetation and available fuels could experience rapid fire
spread today. These conditions elevate the risk of fast-moving
fires, especially in grass-dominated areas. As a result, a Fire
Danger Statement (RFD) has been issued for the affected regions.
Please refer to RFDSJU for further details.
PRZ014-040915-
Southeast Coastal Plains-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 20 30
Temp (24h trend) 87 (+1) 69 (-3) 88
RH % (24h trend) 42 (-17) 84 (-4) 44
Wind 20ft/early(mph) E 27 G40 NE 23 G33 E 25 G37
Wind 20ft/late(mph) E 27 G40 NE 23 G33 E 25 G37
Mixing Hgt(ft-agl/msl)6130 6450
Transport Wnd (mph) E 26 E 25
Vent Rate (kt-ft) 140990 141900
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ015-040915-
Southern Hills-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 20 20
Temp (24h trend) 83 (+2) 66 (-3) 84
RH % (24h trend) 54 (-11) 90 (0) 50
Wind 20ft/early(mph) E 27 G37 NE 26 G33 E 25 G34
Wind 20ft/late(mph) E 27 G37 NE 26 G33 E 25 G34
Mixing Hgt(ft-agl/msl)6720 7080
Transport Wnd (mph) E 25 E 23
Vent Rate (kt-ft) 147840 141600
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ016-040915-
North Coastal Plains-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 60 40
Temp (24h trend) 84 (-2) 70 (-2) 85
RH % (24h trend) 60 (-4) 91 (-4) 57
Wind 20ft/early(mph) E 26 G37 E 26 G36 E 25 G35
Wind 20ft/late(mph) E 26 G37 E 26 G36 E 25 G35
Mixing Hgt(ft-agl/msl)5470 5700
Transport Wnd (mph) E 29 E 25
Vent Rate (kt-ft) 136750 125400
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-040915-
Northern Hills-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 50 30
Temp (24h trend) 83 (0) 68 (-2) 84
RH % (24h trend) 62 (-2) 92 (-4) 57
Wind 20ft/early(mph) E 26 G37 E 26 G34 NE 25 G35
Wind 20ft/late(mph) E 26 G37 E 26 G34 NE 25 G35
Mixing Hgt(ft-agl/msl)5970 6570
Transport Wnd (mph) E 25 E 24
Vent Rate (kt-ft) 131340 137970
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ018-040915-
West Coast-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Mclear Mclear
Precip Type Showers Showers None
Chance Precip (%) 10 10 0
Temp (24h trend) 87 (-1) 66 (-3) 88
RH % (24h trend) 52 (-9) 92 (-1) 50
Wind 20ft/early(mph) E 27 G37 E 26 G36 E 25 G34
Wind 20ft/late(mph) E 27 G37 E 26 G36 E 25 G34
Mixing Hgt(ft-agl/msl)6540 6800
Transport Wnd (mph) E 24 E 18
Vent Rate (kt-ft) 137340 108800
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ019-040915-
Eastern Interior-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 50 50
Temp (24h trend) 82 (0) 67 (-3) 83
RH % (24h trend) 61 (-5) 91 (-3) 57
Wind 20ft/early(mph) E 26 G37 E 26 G34 E 25 G34
Wind 20ft/late(mph) E 26 G37 E 26 G34 E 25 G34
Mixing Hgt(ft-agl/msl)5900 6340
Transport Wnd (mph) E 25 E 23
Vent Rate (kt-ft) 129800 126800
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ022-040915-
Luquillo Mountain Range-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 60 60 60
Temp (24h trend) 78 (+1) 65 (-3) 78
RH % (24h trend) 68 (-5) 94 (-3) 64
Wind 20ft/early(mph) E 26 G37 E 24 G33 E 24 G34
Wind 20ft/late(mph) E 26 G37 E 24 G33 E 24 G34
Mixing Hgt(ft-agl/msl)5280 4960
Transport Wnd (mph) E 28 E 25
Vent Rate (kt-ft) 126720 109120
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-040915-
Central Mountain Range-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 20 20 20
Temp (24h trend) 81 (+1) 63 (-4) 81
RH % (24h trend) 61 (-6) 94 (0) 56
Wind 20ft/early(mph) E 26 G37 NE 25 G34 E 25 G34
Wind 20ft/late(mph) E 26 G37 NE 25 G34 E 25 G34
Mixing Hgt(ft-agl/msl)6850 7390
Transport Wnd (mph) E 23 E 21
Vent Rate (kt-ft) 137000 133020
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ024-040915-
Cayey Mountain Range-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 40 40
Temp (24h trend) 77 (0) 65 (-3) 79
RH % (24h trend) 67 (-5) 93 (-5) 62
Wind 20ft/early(mph) E 27 G37 NE 23 G29 E 24 G34
Wind 20ft/late(mph) E 27 G37 NE 23 G29 E 24 G34
Mixing Hgt(ft-agl/msl)5730 5950
Transport Wnd (mph) E 29 E 25
Vent Rate (kt-ft) 143250 130900
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ025-040915-
Vieques-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 50 40 30
Temp (24h trend) 84 (-1) 71 (-2) 84
RH % (24h trend) 58 (-1) 84 (-6) 55
Wind 20ft/early(mph) E 26 G37 E 26 G36 E 25 G34
Wind 20ft/late(mph) E 26 G37 E 26 G36 E 25 G34
Mixing Hgt(ft-agl/msl)4510 4350
Transport Wnd (mph) E 32 E 28
Vent Rate (kt-ft) 126280 104400
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-040915-
Culebra-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 20 40 40
Temp (24h trend) 85 (0) 73 (-2) 85
RH % (24h trend) 58 (-3) 83 (-5) 57
Wind 20ft/early(mph) E 26 G37 E 26 G36 E 25 G34
Wind 20ft/late(mph) E 26 G37 E 26 G36 E 25 G34
Mixing Hgt(ft-agl/msl)4520 4330
Transport Wnd (mph) E 32 E 31
Vent Rate (kt-ft) 126560 116910
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-040915-
Southwest Coastal Plains and Mona Island-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Mclear Mclear Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 10 10 10
Temp (24h trend) 89 (+2) 68 (-4) 89
RH % (24h trend) 40 (-18) 84 (0) 46
Wind 20ft/early(mph) E 27 G39 E 26 G36 E 26 G38
Wind 20ft/late(mph) E 27 G39 E 26 G36 E 26 G38
Mixing Hgt(ft-agl/msl)6890 6760
Transport Wnd (mph) E 24 E 21
Vent Rate (kt-ft) 144690 121680
Dispersion 5 5
DSI 6 5 6
RH Recovery Excellent
Remarks...None.
$$
VIZ001-040915-
Saint Thomas and Saint John-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 10 30 20
Temp (24h trend) 84 (-1) 72 (-2) 84
RH % (24h trend) 58 (-1) 85 (-5) 56
Wind 20ft/early(mph) E 26 G37 E 26 G36 E 25 G34
Wind 20ft/late(mph) E 26 G37 E 26 G36 E 25 G34
Mixing Hgt(ft-agl/msl)4490 4290
Transport Wnd (mph) E 32 E 28
Vent Rate (kt-ft) 125720 102960
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-040915-
St Croix-
506 AM AST Thu Apr 3 2025
Today Tonight Fri
Cloud Cover Pcldy Pcldy Mclear
Precip Type Showers Showers None
Chance Precip (%) 50 50 0
Temp (24h trend) 84 (-1) 72 (-2) 84
RH % (24h trend) 60 (-1) 87 (-3) 55
Wind 20ft/early(mph) E 26 G37 E 26 G36 E 25 G34
Wind 20ft/late(mph) E 26 G37 E 26 G36 E 25 G34
Mixing Hgt(ft-agl/msl)5060 5250
Transport Wnd (mph) E 31 E 28
Vent Rate (kt-ft) 136620 126000
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$