483
FNCA52 TJSJ 080802
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
402 AM AST THU JAN 8 2026
DISCUSSION
A SURFACE HIGH PRESSURE OVER THE WESTERN ATLANTIC, ALONG WITH
WEAK INDUCED SURFACE TROUGHS NORTHEAST OF THE REGION, WILL PROMOTE
MODERATE EAST TO NORTHEAST TRADE WINDS THROUGH THE THE REST OF
THE WEEK. AN INCREASE IN SHOWER ACTIVITY IS EXPECTED TODAY AROSS
THE REGION, PARTICULARLY OVER PORTIONS OF WESTERN AND SOUTHWESTERN
PUERTO RICO. DESPITE THE EXPECTED WEATHER CONDITIONS, RH VALUES
ARE EXPECTED TO DROP INTO THE LOW AND MID 50S BY LATE THIS
MORNING. NORTHEAST WINDS SHOULD RANGE BETWEEN 10 AND 15 MPH IN
GENERAL. THEREFORE, AT THIS TIME THE FORE DANGER REMAINS LOW.
PRZ014-090815-
SOUTHEAST COASTAL PLAINS-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 20
TEMP (24H TREND) 87 (+2) 67 (-1) 88
RH % (24H TREND) 54 (+3) 96 (+3) 55
WIND 20FT/EARLY(MPH) E 11 NE 9 E 14 G20
WIND 20FT/LATE(MPH) E 11 NE 9 E 14 G20
MIXING HGT(FT-AGL/MSL)4660 5300
TRANSPORT WND (MPH) E 7 E 12
VENT RATE (KT-FT) 27960 53000
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-090815-
SOUTHERN HILLS-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 50 30
TEMP (24H TREND) 83 (+3) 64 (-2) 83
RH % (24H TREND) 59 (-5) 99 (+5) 62
WIND 20FT/EARLY(MPH) E 8 NE 8 E 11
WIND 20FT/LATE(MPH) E 8 NE 8 E 11
MIXING HGT(FT-AGL/MSL)5480 5650
TRANSPORT WND (MPH) E 6 E 9
VENT RATE (KT-FT) 27400 45200
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-090815-
NORTH COASTAL PLAINS-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 20
TEMP (24H TREND) 85 (+2) 67 (-1) 85
RH % (24H TREND) 61 (-5) 100 (+2) 62
WIND 20FT/EARLY(MPH) NE 12 E 11 NE 14 G17
WIND 20FT/LATE(MPH) NE 12 E 11 NE 14 G17
MIXING HGT(FT-AGL/MSL)4710 4670
TRANSPORT WND (MPH) E 8 E 13
VENT RATE (KT-FT) 32970 51370
DISPERSION 5 5
DSI 5 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-090815-
NORTHERN HILLS-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 10
TEMP (24H TREND) 83 (+2) 65 (-1) 84
RH % (24H TREND) 61 (-5) 100 (0) 61
WIND 20FT/EARLY(MPH) NE 11 E 10 NE 13
WIND 20FT/LATE(MPH) NE 11 E 10 NE 13
MIXING HGT(FT-AGL/MSL)5540 5440
TRANSPORT WND (MPH) E 7 E 12
VENT RATE (KT-FT) 33240 54400
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-090815-
WEST COAST-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 60 50
TEMP (24H TREND) 86 (+1) 66 (-1) 87
RH % (24H TREND) 58 (-3) 99 (+4) 59
WIND 20FT/EARLY(MPH) NE 13 NE 13 E 14
WIND 20FT/LATE(MPH) NE 13 NE 13 E 14
MIXING HGT(FT-AGL/MSL)4730 4480
TRANSPORT WND (MPH) E 7 E 7
VENT RATE (KT-FT) 28380 26880
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-090815-
EASTERN INTERIOR-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 20
TEMP (24H TREND) 84 (+3) 65 (-2) 84
RH % (24H TREND) 62 (-6) 99 (+1) 64
WIND 20FT/EARLY(MPH) NE 8 NE 8 E 10
WIND 20FT/LATE(MPH) NE 8 NE 8 E 10
MIXING HGT(FT-AGL/MSL)6050 5700
TRANSPORT WND (MPH) E 6 E 10
VENT RATE (KT-FT) 30250 51300
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-090815-
LUQUILLO MOUNTAIN RANGE-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 40
TEMP (24H TREND) 79 (+3) 64 (-2) 79
RH % (24H TREND) 66 (-7) 100 (+2) 69
WIND 20FT/EARLY(MPH) E 6 NE 6 E 9
WIND 20FT/LATE(MPH) E 6 NE 6 E 9
MIXING HGT(FT-AGL/MSL)4590 4750
TRANSPORT WND (MPH) E 6 E 10
VENT RATE (KT-FT) 22950 42750
DISPERSION 5 5
DSI 4 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-090815-
CENTRAL MOUNTAIN RANGE-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 70 30
TEMP (24H TREND) 82 (+4) 62 (-2) 82
RH % (24H TREND) 59 (-7) 100 (+1) 61
WIND 20FT/EARLY(MPH) NE 9 NE 10 E 9
WIND 20FT/LATE(MPH) NE 9 NE 10 E 9
MIXING HGT(FT-AGL/MSL)6500 6640
TRANSPORT WND (MPH) E 5 E 8
VENT RATE (KT-FT) 26000 46480
DISPERSION 5 5
DSI 5 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-090815-
CAYEY MOUNTAIN RANGE-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 20
TEMP (24H TREND) 80 (+3) 64 (-1) 80
RH % (24H TREND) 66 (-4) 100 (+1) 68
WIND 20FT/EARLY(MPH) E 8 NE 6 E 10
WIND 20FT/LATE(MPH) E 8 NE 6 E 10
MIXING HGT(FT-AGL/MSL)5250 5380
TRANSPORT WND (MPH) E 7 E 10
VENT RATE (KT-FT) 31500 48420
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-090815-
VIEQUES-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 30
TEMP (24H TREND) 85 (0) 70 (-2) 85
RH % (24H TREND) 58 (-2) 97 (+8) 59
WIND 20FT/EARLY(MPH) NE 8 NE 11 E 12
WIND 20FT/LATE(MPH) NE 8 NE 11 E 12
MIXING HGT(FT-AGL/MSL)3450 3420
TRANSPORT WND (MPH) NE 7 E 13
VENT RATE (KT-FT) 20700 37620
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-090815-
CULEBRA-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 30
TEMP (24H TREND) 85 (0) 72 (-2) 86
RH % (24H TREND) 58 (-5) 91 (+5) 59
WIND 20FT/EARLY(MPH) NE 9 NE 11 E 12
WIND 20FT/LATE(MPH) NE 9 NE 11 E 12
MIXING HGT(FT-AGL/MSL)3340 3410
TRANSPORT WND (MPH) E 10 E 12
VENT RATE (KT-FT) 30060 34100
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-090815-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 40
TEMP (24H TREND) 88 (+2) 66 (-3) 88
RH % (24H TREND) 53 (+6) 95 (+7) 56
WIND 20FT/EARLY(MPH) SE 12 NE 16 G18 E 14 G18
WIND 20FT/LATE(MPH) SE 12 NE 16 G18 E 14 G18
MIXING HGT(FT-AGL/MSL)4610 4780
TRANSPORT WND (MPH) E 6 E 9
VENT RATE (KT-FT) 23050 38240
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-090815-
SAINT THOMAS AND SAINT JOHN-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 20
TEMP (24H TREND) 85 (+1) 71 (-3) 85
RH % (24H TREND) 57 (-7) 96 (+7) 58
WIND 20FT/EARLY(MPH) E 8 E 11 E 13
WIND 20FT/LATE(MPH) E 8 E 11 E 13
MIXING HGT(FT-AGL/MSL)3290 3450
TRANSPORT WND (MPH) NE 9 E 12
VENT RATE (KT-FT) 26320 34500
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-090815-
ST CROIX-
402 AM AST THU JAN 8 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 30
TEMP (24H TREND) 86 (+1) 71 (-3) 86
RH % (24H TREND) 59 (-5) 94 (+6) 60
WIND 20FT/EARLY(MPH) E 8 E 9 E 12
WIND 20FT/LATE(MPH) E 8 E 9 E 12
MIXING HGT(FT-AGL/MSL)4490 4080
TRANSPORT WND (MPH) E 8 E 14
VENT RATE (KT-FT) 31430 48960
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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