573
FNCA52 TJSJ 291930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST SAT AUG 29 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-300800-
SOUTHEAST COASTAL PLAINS-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR MCLDY CLOUDY MCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 30 80 90 70
TEMP (24H TREND) 77 (-1) 90 (-3) 75 89
RH % (24H TREND) 87 (+2) 58 (+6) 86 51
WIND 20FT/EARLY(MPH) NE 12 NE 10 SE 16 SE 13
WIND 20FT/LATE(MPH) NE 9 SE 10 SE 16 SE 13
MIXING HGT(FT-AGL/MSL) 3520 1970
TRANSPORT WND (MPH) NE 5 E 9
VENT RATE (KT-FT) 14080 15760
DISPERSION 5 5
DSI 4 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-300800-
SOUTHERN HILLS-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR MCLDY CLOUDY MCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 20 80 90 70
TEMP (24H TREND) 72 (-3) 87 (-1) 71 87
RH % (24H TREND) 93 (+1) 61 (-2) 87 52
WIND 20FT/EARLY(MPH) NE 13 NE 10 SE 16 SE 11
WIND 20FT/LATE(MPH) NE 12 SE 10 SE 14 SE 11
MIXING HGT(FT-AGL/MSL) 3930 1900
TRANSPORT WND (MPH) NE 7 E 9
VENT RATE (KT-FT) 23580 15200
DISPERSION 5 5
DSI 3 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-300800-
NORTH COASTAL PLAINS-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY MCLDY MCLDY MCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 40 80 80 70
TEMP (24H TREND) 77 (-1) 88 (-4) 75 91
RH % (24H TREND) 94 (+2) 63 (-2) 85 49
WIND 20FT/EARLY(MPH) E 19 NE 16 SE 17 SE 10
WIND 20FT/LATE(MPH) E 14 E 14 SE 16 E 12
MIXING HGT(FT-AGL/MSL) 3400 2220
TRANSPORT WND (MPH) NE 13 SE 9
VENT RATE (KT-FT) 37400 17760
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-300800-
NORTHERN HILLS-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR MCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 20 80 80 80
TEMP (24H TREND) 74 (-1) 85 (-5) 73 89
RH % (24H TREND) 96 (0) 67 (0) 88 51
WIND 20FT/EARLY(MPH) E 17 NE 14 SE 12 SE 8
WIND 20FT/LATE(MPH) E 12 NE 13 SE 12 E 11
MIXING HGT(FT-AGL/MSL) 4010 1920
TRANSPORT WND (MPH) NE 13 SE 7
VENT RATE (KT-FT) 44110 11520
DISPERSION 5 5
DSI 5 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-300800-
WEST COAST-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR PCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 10 60 90 70
TEMP (24H TREND) 74 (-1) 90 (-3) 73 91
RH % (24H TREND) 95 (+1) 58 (-7) 87 49
WIND 20FT/EARLY(MPH) NE 16 NE 17 SE 18 SE 18
WIND 20FT/LATE(MPH) NE 16 E 16 SE 19 SE 14
MIXING HGT(FT-AGL/MSL) 4090 2130
TRANSPORT WND (MPH) NE 10 SE 14
VENT RATE (KT-FT) 36810 25560
DISPERSION 5 5
DSI 3 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-300800-
EASTERN INTERIOR-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY MCLDY CLOUDY MCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 40 80 90 70
TEMP (24H TREND) 74 (-3) 87 (-3) 73 89
RH % (24H TREND) 93 (-1) 66 (+4) 88 52
WIND 20FT/EARLY(MPH) E 14 NE 13 SE 19 SE 12
WIND 20FT/LATE(MPH) NE 13 SE 13 SE 18 SE 11
MIXING HGT(FT-AGL/MSL) 3430 2630
TRANSPORT WND (MPH) NE 8 SE 10
VENT RATE (KT-FT) 24010 23670
DISPERSION 5 5
DSI 4 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-300800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY MCLDY CLOUDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 50 80 90 70
TEMP (24H TREND) 71 (-3) 83 (-1) 70 85
RH % (24H TREND) 96 (-1) 70 (-1) 92 57
WIND 20FT/EARLY(MPH) E 11 NE 10 SE 16 SE 10
WIND 20FT/LATE(MPH) NE 10 SE 11 SE 14 SE 9
MIXING HGT(FT-AGL/MSL) 2930 3190
TRANSPORT WND (MPH) SE 8 E 15
VENT RATE (KT-FT) 20510 41470
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-300800-
CENTRAL MOUNTAIN RANGE-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR MCLDY MCLDY MCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 10 80 80 80
TEMP (24H TREND) 70 (-2) 83 (-2) 69 86
RH % (24H TREND) 95 (-1) 68 (-4) 90 54
WIND 20FT/EARLY(MPH) E 12 NE 14 SE 14 SE 10
WIND 20FT/LATE(MPH) NE 11 E 13 SE 16 SE 11
MIXING HGT(FT-AGL/MSL) 4360 1570
TRANSPORT WND (MPH) NE 10 SE 7
VENT RATE (KT-FT) 39240 9420
DISPERSION 5 5
DSI 3 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-300800-
CAYEY MOUNTAIN RANGE-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY MCLDY CLOUDY MCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 40 80 90 70
TEMP (24H TREND) 72 (-2) 84 (-2) 71 84
RH % (24H TREND) 96 (-2) 68 (+3) 90 56
WIND 20FT/EARLY(MPH) NE 11 NE 9 SE 13 SE 9
WIND 20FT/LATE(MPH) NE 10 SE 9 SE 13 SE 9
MIXING HGT(FT-AGL/MSL) 3320 2380
TRANSPORT WND (MPH) NE 7 E 12
VENT RATE (KT-FT) 19920 23800
DISPERSION 5 5
DSI 3 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-300800-
VIEQUES-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY MCLDY CLOUDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 50 70 80 60
TEMP (24H TREND) 80 (-1) 89 (-2) 78 90
RH % (24H TREND) 87 (+3) 63 (+2) 82 50
WIND 20FT/EARLY(MPH) NE 18 NE 16 SE 21 SE 16
WIND 20FT/LATE(MPH) NE 18 SE 18 SE 19 E 12
MIXING HGT(FT-AGL/MSL) 2860 3150
TRANSPORT WND (MPH) S 22 E 16
VENT RATE (KT-FT) 54340 44100
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-300800-
CULEBRA-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 50 80 80 50
TEMP (24H TREND) 79 (-3) 89 (-1) 78 91
RH % (24H TREND) 87 (+2) 63 (-4) 83 50
WIND 20FT/EARLY(MPH) E 18 NE 17 SE 23 SE 16
WIND 20FT/LATE(MPH) NE 18 SE 19 SE 20 E 12
MIXING HGT(FT-AGL/MSL) 2930 3020
TRANSPORT WND (MPH) S 25 E 16
VENT RATE (KT-FT) 64460 42280
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-300800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR PCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 10 70 90 60
TEMP (24H TREND) 75 (-3) 90 (-2) 75 91
RH % (24H TREND) 89 (+7) 55 (0) 86 50
WIND 20FT/EARLY(MPH) E 12 NE 18 SE 18 SE 20
WIND 20FT/LATE(MPH) NE 16 S 16 SE 23 SE 17
MIXING HGT(FT-AGL/MSL) 3540 1930
TRANSPORT WND (MPH) SE 5 E 21
VENT RATE (KT-FT) 14160 34740
DISPERSION 5 5
DSI 2 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-300800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 50 90 80 50
TEMP (24H TREND) 79 (-2) 87 (-1) 78 89
RH % (24H TREND) 89 (+3) 66 (-2) 85 52
WIND 20FT/EARLY(MPH) NE 19 E 18 SE 21 SE 14
WIND 20FT/LATE(MPH) NE 19 SE 20 SE 20 E 13
MIXING HGT(FT-AGL/MSL) 2750 3070
TRANSPORT WND (MPH) SE 31 E 17
VENT RATE (KT-FT) 74250 46050
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-300800-
ST CROIX-
330 PM AST SAT AUG 29 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 80 80 50
TEMP (24H TREND) 78 (-3) 87 (-2) 78 90
RH % (24H TREND) 88 (-1) 66 (-1) 85 56
WIND 20FT/EARLY(MPH) NE 18 E 12 SE 20 E 12
WIND 20FT/LATE(MPH) NE 18 SE 18 SE 19 E 13
MIXING HGT(FT-AGL/MSL) 3810 4420
TRANSPORT WND (MPH) S 22 E 17
VENT RATE (KT-FT) 72390 66300
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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