283
FNCA52 TJSJ 190730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST SUN JUL 19 2026
DISCUSSION
A FIRE DANGER STATEMENT (RFD) REMAINS IN EFFECT FOR THE LOCAL
FIRE WEATHER ZONES. CRITICALLY DRY FUELS AND SIGNIFICANT SOIL
MOISTURE DEFICITS PERSIST ACROSS PORTIONS OF MOST PR AND THE
USVI, WITH KBDI VALUES REMAINING ABOVE CRITICAL THRESHOLDS. ANY
FIRES THAT DEVELOP COULD SPREAD THROUGH DRY VEGETATION,
PARTICULARLY ACROSS THE SOUTHERN COASTAL PLAINS. RESIDENTS AND
VISITORS SHOULD AVOID OUTDOOR BURNING AND EXERCISE CAUTION WHEN
USING OPEN FLAMES OR OTHER POTENTIAL IGNITION SOURCES.
PRZ014-192000-
SOUTHEAST COASTAL PLAINS-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 30 20
TEMP (24H TREND) 92 (+1) 74 (-3) 91
RH % (24H TREND) 45 (-6) 88 (+6) 49
WIND 20FT/EARLY(MPH) E 17 E 14 E 16
WIND 20FT/LATE(MPH) E 20 NE 10 E 20
MIXING HGT(FT-AGL/MSL)5350 5970
TRANSPORT WND (MPH) E 18 E 18
VENT RATE (KT-FT) 85600 95520
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-192000-
SOUTHERN HILLS-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 10
TEMP (24H TREND) 90 (+3) 70 (-3) 89
RH % (24H TREND) 53 (-7) 95 (+6) 58
WIND 20FT/EARLY(MPH) E 13 E 13 E 13
WIND 20FT/LATE(MPH) E 16 NE 12 E 14
MIXING HGT(FT-AGL/MSL)6210 6560
TRANSPORT WND (MPH) E 16 E 16
VENT RATE (KT-FT) 86940 91840
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-192000-
NORTH COASTAL PLAINS-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 10
TEMP (24H TREND) 90 (0) 73 (-3) 89
RH % (24H TREND) 57 (-6) 94 (+4) 61
WIND 20FT/EARLY(MPH) E 16 E 19 E 16
WIND 20FT/LATE(MPH) E 23 E 13 NE 20
MIXING HGT(FT-AGL/MSL)5310 5770
TRANSPORT WND (MPH) E 16 E 16
VENT RATE (KT-FT) 74340 80780
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-192000-
NORTHERN HILLS-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 0 30
TEMP (24H TREND) 90 (+1) 71 (-2) 89
RH % (24H TREND) 57 (-5) 96 (+2) 63
WIND 20FT/EARLY(MPH) E 13 E 17 E 13
WIND 20FT/LATE(MPH) NE 19 E 11 NE 17
MIXING HGT(FT-AGL/MSL)6510 6910
TRANSPORT WND (MPH) E 15 E 13
VENT RATE (KT-FT) 84630 76010
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-192000-
WEST COAST-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 20
TEMP (24H TREND) 93 (+2) 73 (0) 92
RH % (24H TREND) 56 (-5) 94 (+1) 60
WIND 20FT/EARLY(MPH) E 13 E 14 E 12
WIND 20FT/LATE(MPH) E 14 E 12 E 14
MIXING HGT(FT-AGL/MSL)5210 5440
TRANSPORT WND (MPH) E 9 E 9
VENT RATE (KT-FT) 41680 43520
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-192000-
EASTERN INTERIOR-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 40 20
TEMP (24H TREND) 89 (+1) 72 (-3) 89
RH % (24H TREND) 56 (-5) 96 (+6) 59
WIND 20FT/EARLY(MPH) E 14 E 13 E 14
WIND 20FT/LATE(MPH) E 13 E 14 E 14
MIXING HGT(FT-AGL/MSL)6360 6970
TRANSPORT WND (MPH) E 16 E 15
VENT RATE (KT-FT) 89040 90610
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-192000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 40 20
TEMP (24H TREND) 85 (+3) 69 (-4) 85
RH % (24H TREND) 62 (-11) 99 (+5) 67
WIND 20FT/EARLY(MPH) E 12 E 11 E 13
WIND 20FT/LATE(MPH) E 12 E 11 E 13
MIXING HGT(FT-AGL/MSL)4600 5300
TRANSPORT WND (MPH) E 16 E 15
VENT RATE (KT-FT) 64400 68900
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-192000-
CENTRAL MOUNTAIN RANGE-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 0 20
TEMP (24H TREND) 88 (+3) 68 (-2) 88
RH % (24H TREND) 58 (-7) 98 (+3) 64
WIND 20FT/EARLY(MPH) E 10 E 12 E 9
WIND 20FT/LATE(MPH) E 12 E 9 E 12
MIXING HGT(FT-AGL/MSL)8550 7700
TRANSPORT WND (MPH) E 9 E 12
VENT RATE (KT-FT) 68400 77000
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-192000-
CAYEY MOUNTAIN RANGE-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 40 20
TEMP (24H TREND) 85 (+1) 69 (-4) 85
RH % (24H TREND) 61 (-7) 99 (+3) 65
WIND 20FT/EARLY(MPH) E 12 E 11 E 12
WIND 20FT/LATE(MPH) E 13 E 9 E 12
MIXING HGT(FT-AGL/MSL)5320 6100
TRANSPORT WND (MPH) E 17 E 17
VENT RATE (KT-FT) 79800 91500
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-192000-
VIEQUES-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 40 30
TEMP (24H TREND) 90 (+1) 79 (-1) 90
RH % (24H TREND) 55 (-8) 83 (+1) 57
WIND 20FT/EARLY(MPH) E 18 E 16 E 17
WIND 20FT/LATE(MPH) E 16 E 17 E 16
MIXING HGT(FT-AGL/MSL)3320 2680
TRANSPORT WND (MPH) E 18 E 20
VENT RATE (KT-FT) 53120 45560
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-192000-
CULEBRA-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 10
TEMP (24H TREND) 90 (+2) 78 (-2) 90
RH % (24H TREND) 57 (-8) 89 (+5) 59
WIND 20FT/EARLY(MPH) E 18 E 17 E 17
WIND 20FT/LATE(MPH) E 14 E 18 E 16
MIXING HGT(FT-AGL/MSL)3290 2770
TRANSPORT WND (MPH) E 20 E 18
VENT RATE (KT-FT) 55930 44320
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-192000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE NONE
CHANCE PRECIP (%) 10 0 0
TEMP (24H TREND) 92 (+1) 74 (-2) 92
RH % (24H TREND) 47 (-9) 85 (+6) 49
WIND 20FT/EARLY(MPH) E 18 E 13 E 16
WIND 20FT/LATE(MPH) E 20 E 9 E 17
MIXING HGT(FT-AGL/MSL)5700 5810
TRANSPORT WND (MPH) E 16 E 18
VENT RATE (KT-FT) 79800 92960
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-192000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 10
TEMP (24H TREND) 87 (0) 75 (-2) 86
RH % (24H TREND) 59 (-8) 95 (+6) 63
WIND 20FT/EARLY(MPH) E 19 E 19 E 19
WIND 20FT/LATE(MPH) E 16 E 18 E 16
MIXING HGT(FT-AGL/MSL)3330 2780
TRANSPORT WND (MPH) E 21 E 18
VENT RATE (KT-FT) 59940 44480
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-192000-
ST CROIX-
330 AM AST SUN JUL 19 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 10
TEMP (24H TREND) 90 (+2) 76 (-1) 90
RH % (24H TREND) 58 (-9) 93 (+2) 59
WIND 20FT/EARLY(MPH) E 18 E 16 E 17
WIND 20FT/LATE(MPH) E 16 E 16 E 16
MIXING HGT(FT-AGL/MSL)4910 5090
TRANSPORT WND (MPH) E 22 E 18
VENT RATE (KT-FT) 93290 81440
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page