Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
413
FNCA52 TJSJ 150947
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
547 AM AST Wed Oct 15 2025
.DISCUSSION...
There is LOW fire weather threat across the vulnerable areas.
Increasing moisture/rainfall activity today and weak winds.
PRZ014-152015-
Southeast Coastal Plains-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 50 40 40
Temp (24h trend) 91 (+2) 73 (-2) 90
RH % (24h trend) 53 (-12) 93 (+3) 54
20ftWnd-Val/AM(mph) Lgt/Var Lgt/Var
20ftWnd-Rdg/PM(mph) S 5 Lgt/Var SW 9
Precip Amount 0.21 0.10 0.16
Precip Duration 4 4 3
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1410 1393
Mixing Hgt(ft-AGL/MSL)4626 4569
Transport Wnd (kts) S 6 SW 9
Transport Wnd (m/s) S 3 SW 5
Transport Wnd (mph) S 7 SW 10
Vent Rate (kt-ft) 29797 44704
Vent Rate (m/s-m) 4682 7024
Vent Rate (mph-ft) 34267 51410
Dispersion 5 5
DSI 5 1 5
Sunshine Hours N/A N/A N/A
CWR
LAL 1 1 1
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
PRZ015-152015-
Southern Hills-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 50 30 50
Temp (24h trend) 87 (+2) 70 (-3) 87
RH % (24h trend) 62 (-6) 98 (+5) 63
20ftWnd-Val/AM(mph) Lgt/Var Lgt/Var
20ftWnd-Rdg/PM(mph) S 5 Lgt/Var SW 7
Precip Amount 0.29 0.07 0.30
Precip Duration 4 3 3
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1701 1538
Mixing Hgt(ft-AGL/MSL)5581 5046
Transport Wnd (kts) S 6 SW 10
Transport Wnd (m/s) S 3 SW 5
Transport Wnd (mph) S 7 SW 12
Vent Rate (kt-ft) 50616 52176
Vent Rate (m/s-m) 7953 8198
Vent Rate (mph-ft) 58208 60002
Dispersion 5 5
DSI 5 1 5
Sunshine Hours N/A N/A N/A
CWR
LAL 2 1 1
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
PRZ016-152015-
North Coastal Plains-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 80 60 80
Temp (24h trend) 92 (+2) 73 (-2) 91
RH % (24h trend) 58 (-7) 96 (+1) 61
20ftWnd-Val/AM(mph) Lgt/Var Lgt/Var
20ftWnd-Rdg/PM(mph) W 6 Lgt/Var Lgt/Var
Precip Amount 0.94 0.16 0.90
Precip Duration 7 3 8
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1666 1408
Mixing Hgt(ft-AGL/MSL)5465 4621
Transport Wnd (kts) S 6 SW 7
Transport Wnd (m/s) S 3 SW 4
Transport Wnd (mph) S 7 SW 8
Vent Rate (kt-ft) 35790 56910
Vent Rate (m/s-m) 5623 8941
Vent Rate (mph-ft) 41159 65446
Dispersion 5 5
DSI 5 2 5
Sunshine Hours N/A N/A N/A
CWR
LAL 2 2 2
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
PRZ017-152015-
Northern Hills-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 90 30 60
Temp (24h trend) 90 (+2) 71 (-1) 90
RH % (24h trend) 61 (-5) 98 (+2) 63
20ftWnd-Val/AM(mph) Lgt/Var Lgt/Var
20ftWnd-Rdg/PM(mph) Lgt/Var Lgt/Var SW 6
Precip Amount 0.91 0.07 0.51
Precip Duration 7 3 5
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1733 1628
Mixing Hgt(ft-AGL/MSL)5685 5342
Transport Wnd (kts) SW 5 SW 10
Transport Wnd (m/s) SW 3 SW 5
Transport Wnd (mph) SW 6 SW 12
Vent Rate (kt-ft) 57060 59568
Vent Rate (m/s-m) 8965 9359
Vent Rate (mph-ft) 65619 68503
Dispersion 5 5
DSI 5 2 5
Sunshine Hours N/A N/A N/A
CWR
LAL 2 2 2
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
PRZ018-152015-
West Coast-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Mcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 20 30 60
Temp (24h trend) 91 (0) 73 (-1) 90
RH % (24h trend) 62 (-3) 98 (+3) 65
20ftWnd-Val/AM(mph) SE 7 S 7
20ftWnd-Rdg/PM(mph) S 10 S 5 SW 10
Precip Amount 0.08 0.03 0.35
Precip Duration 1 2 5
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1577 1379
Mixing Hgt(ft-AGL/MSL)5173 4524
Transport Wnd (kts) S 10 SW 12
Transport Wnd (m/s) S 5 SW 6
Transport Wnd (mph) S 12 SW 14
Vent Rate (kt-ft) 53514 50160
Vent Rate (m/s-m) 8408 7881
Vent Rate (mph-ft) 61541 57684
Dispersion 5 5
DSI 6 4 6
Sunshine Hours N/A N/A N/A
CWR
LAL 2 1 1
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
PRZ019-152015-
Eastern Interior-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 70 60 80
Temp (24h trend) 90 (+2) 71 (-2) 89
RH % (24h trend) 61 (-4) 100 (+4) 60
20ftWnd-Val/AM(mph) Lgt/Var Lgt/Var
20ftWnd-Rdg/PM(mph) S 5 Lgt/Var SW 5
Precip Amount 0.85 0.16 0.98
Precip Duration 7 4 7
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1743 1583
Mixing Hgt(ft-AGL/MSL)5718 5195
Transport Wnd (kts) S 7 SW 9
Transport Wnd (m/s) S 4 SW 5
Transport Wnd (mph) S 8 SW 10
Vent Rate (kt-ft) 45320 51950
Vent Rate (m/s-m) 7120 8162
Vent Rate (mph-ft) 52118 59742
Dispersion 5 5
DSI 5 1 5
Sunshine Hours N/A N/A N/A
CWR
LAL 2 2 2
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
PRZ022-152015-
Luquillo Mountain Range-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 70 70 90
Temp (24h trend) 86 (+4) 68 (-4) 86
RH % (24h trend) 66 (-7) 100 (0) 66
20ftWnd-Val/AM(mph) Lgt/Var Lgt/Var
20ftWnd-Rdg/PM(mph) S 6 Lgt/Var S 5
Precip Amount 0.90 0.23 1.36
Precip Duration 7 4 6
Precip Begin 6 AM Continuing 12 PM
Precip End Continuing 6 AM Continuing
Mixing Hgt(m-AGL/MSL) 1394 925
Mixing Hgt(ft-AGL/MSL)4572 3036
Transport Wnd (kts) S 8 SW 7
Transport Wnd (m/s) S 4 SW 4
Transport Wnd (mph) S 9 SW 8
Vent Rate (kt-ft) 37226 29993
Vent Rate (m/s-m) 5849 4712
Vent Rate (mph-ft) 42810 34492
Dispersion 5 5
DSI 5 1 5
Sunshine Hours N/A N/A N/A
CWR
LAL 2 1 2
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
PRZ023-152015-
Central Mountain Range-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Tstms
Chance Precip (%) 60 20 60
Temp (24h trend) 87 (+4) 68 (-3) 86
RH % (24h trend) 63 (-6) 97 (+2) 67
20ftWnd-Val/AM(mph) Lgt/Var Lgt/Var
20ftWnd-Rdg/PM(mph) Lgt/Var Lgt/Var SW 7
Precip Amount 0.51 0.04 0.43
Precip Duration 3 1 5
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1770 1655
Mixing Hgt(ft-AGL/MSL)5807 5429
Transport Wnd (kts) S 7 SW 11
Transport Wnd (m/s) S 4 SW 6
Transport Wnd (mph) S 8 SW 13
Vent Rate (kt-ft) 57266 61860
Vent Rate (m/s-m) 8997 9719
Vent Rate (mph-ft) 65856 71139
Dispersion 5 5
DSI 5 1 5
Sunshine Hours N/A N/A N/A
CWR
LAL 2 1 2
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
PRZ024-152015-
Cayey Mountain Range-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 50 50 60
Temp (24h trend) 85 (+2) 69 (-2) 86
RH % (24h trend) 66 (-5) 100 (+1) 66
20ftWnd-Val/AM(mph) Lgt/Var Lgt/Var
20ftWnd-Rdg/PM(mph) S 6 Lgt/Var SW 7
Precip Amount 0.38 0.12 0.43
Precip Duration 5 3 4
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1588 1452
Mixing Hgt(ft-AGL/MSL)5211 4765
Transport Wnd (kts) SW 7 SW 11
Transport Wnd (m/s) SW 4 SW 6
Transport Wnd (mph) SW 8 SW 13
Vent Rate (kt-ft) 40104 48741
Vent Rate (m/s-m) 6301 7658
Vent Rate (mph-ft) 46120 56052
Dispersion 5 5
DSI 5 1 5
Sunshine Hours N/A N/A N/A
CWR
LAL 1 1 2
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
PRZ025-152015-
Vieques-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 60 50 50
Temp (24h trend) 89 (0) 76 (-1) 90
RH % (24h trend) 59 (-4) 98 (+5) 62
20ftWnd-Val/AM(mph) SE 8 SW 12
20ftWnd-Rdg/PM(mph) S 9 SW 8 SW 13
Precip Amount 0.20 0.11 0.19
Precip Duration 5 5 3
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1049 975
Mixing Hgt(ft-AGL/MSL)3443 3200
Transport Wnd (kts) S 10 SW 14
Transport Wnd (m/s) S 5 SW 7
Transport Wnd (mph) S 12 SW 16
Vent Rate (kt-ft) 36850 47400
Vent Rate (m/s-m) 5790 7447
Vent Rate (mph-ft) 42378 54510
Dispersion 5 5
DSI 6 5 6
Sunshine Hours N/A N/A N/A
CWR
LAL 1 1 1
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
PRZ026-152015-
Culebra-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 60 50 60
Temp (24h trend) 92 (+2) 77 (-2) 92
RH % (24h trend) 57 (-7) 97 (+7) 59
20ftWnd-Val/AM(mph) SE 9 SW 12
20ftWnd-Rdg/PM(mph) S 10 SW 8 SW 13
Precip Amount 0.19 0.14 0.29
Precip Duration 5 5 4
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1052 966
Mixing Hgt(ft-AGL/MSL)3452 3169
Transport Wnd (kts) S 11 SW 14
Transport Wnd (m/s) S 6 SW 7
Transport Wnd (mph) S 13 SW 16
Vent Rate (kt-ft) 37972 44366
Vent Rate (m/s-m) 5966 6971
Vent Rate (mph-ft) 43668 51021
Dispersion 5 5
DSI 6 6 6
Sunshine Hours N/A N/A N/A
CWR
LAL 1 1 1
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
PRZ027-152015-
Southwest Coastal Plains and Mona Island-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Tstms
Chance Precip (%) 40 30 50
Temp (24h trend) 92 (+1) 75 (-1) 91
RH % (24h trend) 51 (-10) 93 (+4) 54
20ftWnd-Val/AM(mph) SE 7 SW 6
20ftWnd-Rdg/PM(mph) S 8 Lgt/Var SW 10 G18
Precip Amount 0.09 0.04 0.25
Precip Duration 2 3 5
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1467 1475
Mixing Hgt(ft-AGL/MSL)4814 4839
Transport Wnd (kts) SE 9 SW 10
Transport Wnd (m/s) SE 5 SW 5
Transport Wnd (mph) SE 10 SW 12
Vent Rate (kt-ft) 42562 46266
Vent Rate (m/s-m) 6687 7269
Vent Rate (mph-ft) 48946 53206
Dispersion 5 5
DSI 5 2 5
Sunshine Hours N/A N/A N/A
CWR
LAL 1 1 1
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
VIZ001-152015-
Saint Thomas and Saint John-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Pcldy Mcldy Mcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 50 60 60
Temp (24h trend) 87 (+1) 75 (-3) 87
RH % (24h trend) 65 (-3) 99 (+8) 67
20ftWnd-Val/AM(mph) SE 9 SW 12
20ftWnd-Rdg/PM(mph) S 9 S 9 SW 12
Precip Amount 0.16 0.15 0.30
Precip Duration 5 6 5
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1067 1053
Mixing Hgt(ft-AGL/MSL)3501 3456
Transport Wnd (kts) S 10 SW 14
Transport Wnd (m/s) S 5 SW 7
Transport Wnd (mph) S 12 SW 16
Vent Rate (kt-ft) 35010 48477
Vent Rate (m/s-m) 5501 7616
Vent Rate (mph-ft) 40262 55749
Dispersion 5 5
DSI 6 6 6
Sunshine Hours N/A N/A N/A
CWR
LAL 1 1 1
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$
VIZ002-152015-
St Croix-
547 AM AST Wed Oct 15 2025
Today Tonight Thu
Cloud Cover Mcldy Pcldy Pcldy
Precip Type Tstms Tstms Tstms
Chance Precip (%) 60 50 50
Temp (24h trend) 90 (+2) 75 (-3) 90
RH % (24h trend) 63 (-4) 97 (+8) 66
20ftWnd-Val/AM(mph) SE 7 SW 9
20ftWnd-Rdg/PM(mph) S 8 S 6 SW 11
Precip Amount 0.20 0.10 0.20
Precip Duration 6 5 5
Precip Begin 6 AM Continuing Continuing
Precip End Continuing Continuing Continuing
Mixing Hgt(m-AGL/MSL) 1323 1303
Mixing Hgt(ft-AGL/MSL)4339 4275
Transport Wnd (kts) S 9 SW 13
Transport Wnd (m/s) S 5 SW 7
Transport Wnd (mph) S 10 SW 15
Vent Rate (kt-ft) 40946 55535
Vent Rate (m/s-m) 6433 8725
Vent Rate (mph-ft) 47088 63865
Dispersion 5 5
DSI 6 4 6
Sunshine Hours N/A N/A N/A
CWR
LAL 1 1 1
Haines Index
RH Recovery Excellent
Stability Class
Remarks...None.
$$