153
FNCA52 TJSJ 191930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST SUN JUL 19 2026
DISCUSSION
A FIRE DANGER STATEMENT (RFD) REMAINS IN EFFECT FOR THE LOCAL
FIRE WEATHER ZONES. OBSERVATIONS CONTINUE TO SUPPORT RFD
CONDITIONS ACROSS THE SOUTHERN HALF OF PR AND THE USVI. AT THE
SAME TIME, CRITICALLY DRY FUELS AND PERSISTENT SOIL MOISTURE
DEFICITS PERSIST ACROSS PORTIONS OF THE ISLANDS, WITH KBDI VALUES
REMAINING ABOVE CRITICAL THRESHOLDS. MULTIPLE FIRE INCIDENTS HAVE
ALREADY BEEN REPORTED ACROSS PR TODAY, UNDERSCORING THE ELEVATED
FIRE DANGER. COMBINED WITH BREEZY TRADE WINDS, ANY NEW FIRES THAT
DEVELOP COULD SPREAD RAPIDLY THROUGH DRY VEGETATION, PARTICULARLY
ACROSS PR'S SOUTHERN COASTAL PLAINS. RESIDENTS AND VISITORS ARE
URGED TO AVOID OUTDOOR BURNING AND EXERCISE EXTREME CAUTION WITH
OPEN FLAMES, DISCARDED CIGARETTES, OR ANY ACTIVITY CAPABLE OF
PRODUCING SPARKS.
PRZ014-200800-
SOUTHEAST COASTAL PLAINS-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 10 10
TEMP (24H TREND) 74 (-3) 91 (0) 74 93
RH % (24H TREND) 88 (+6) 49 (-1) 84 46
WIND 20FT/EARLY(MPH) E 16 E 18 NE 16 NE 12
WIND 20FT/LATE(MPH) NE 12 E 20 NE 9 E 16
MIXING HGT(FT-AGL/MSL) 5760 5070
TRANSPORT WND (MPH) E 16 E 10
VENT RATE (KT-FT) 80640 45630
DISPERSION 5 5
DSI 4 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-200800-
SOUTHERN HILLS-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 10 10 10 40
TEMP (24H TREND) 70 (-3) 89 (+2) 70 90
RH % (24H TREND) 95 (+6) 58 (-1) 95 56
WIND 20FT/EARLY(MPH) E 13 E 13 NE 12 NE 10
WIND 20FT/LATE(MPH) E 13 E 14 NE 10 E 12
MIXING HGT(FT-AGL/MSL) 6740 5760
TRANSPORT WND (MPH) E 15 E 10
VENT RATE (KT-FT) 87620 51840
DISPERSION 5 5
DSI 3 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-200800-
NORTH COASTAL PLAINS-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 10 20
TEMP (24H TREND) 73 (-3) 89 (0) 73 90
RH % (24H TREND) 94 (+4) 61 (-1) 94 59
WIND 20FT/EARLY(MPH) E 20 E 16 E 17 E 13
WIND 20FT/LATE(MPH) E 14 E 18 E 11 NE 13
MIXING HGT(FT-AGL/MSL) 4880 4520
TRANSPORT WND (MPH) E 17 E 13
VENT RATE (KT-FT) 73200 49720
DISPERSION 5 5
DSI 6 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-200800-
NORTHERN HILLS-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 10 20 0 50
TEMP (24H TREND) 71 (-2) 89 (0) 70 89
RH % (24H TREND) 96 (+2) 63 (+3) 97 62
WIND 20FT/EARLY(MPH) E 18 E 14 E 14 E 12
WIND 20FT/LATE(MPH) E 12 NE 16 E 10 NE 12
MIXING HGT(FT-AGL/MSL) 6060 5300
TRANSPORT WND (MPH) E 14 E 13
VENT RATE (KT-FT) 72720 58300
DISPERSION 5 5
DSI 5 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-200800-
WEST COAST-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE NONE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 0 40 10 70
TEMP (24H TREND) 73 (0) 92 (0) 71 93
RH % (24H TREND) 94 (+1) 60 (0) 97 56
WIND 20FT/EARLY(MPH) E 18 E 12 E 16 NE 12
WIND 20FT/LATE(MPH) E 13 E 16 E 13 E 13
MIXING HGT(FT-AGL/MSL) 6000 5380
TRANSPORT WND (MPH) E 9 E 8
VENT RATE (KT-FT) 48000 37660
DISPERSION 5 5
DSI 5 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-200800-
EASTERN INTERIOR-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 30 30
TEMP (24H TREND) 72 (-3) 89 (+2) 72 90
RH % (24H TREND) 96 (+6) 59 (-1) 93 57
WIND 20FT/EARLY(MPH) E 14 E 13 NE 12 NE 9
WIND 20FT/LATE(MPH) E 13 E 13 NE 11 NE 10
MIXING HGT(FT-AGL/MSL) 6030 6480
TRANSPORT WND (MPH) E 16 E 12
VENT RATE (KT-FT) 84420 64800
DISPERSION 5 5
DSI 4 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-200800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 30 50
TEMP (24H TREND) 69 (-4) 85 (+4) 69 86
RH % (24H TREND) 99 (+5) 67 (-2) 98 65
WIND 20FT/EARLY(MPH) E 12 E 11 NE 10 NE 6
WIND 20FT/LATE(MPH) E 11 E 11 NE 8 NE 9
MIXING HGT(FT-AGL/MSL) 4940 4990
TRANSPORT WND (MPH) E 16 E 10
VENT RATE (KT-FT) 69160 44910
DISPERSION 5 5
DSI 6 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-200800-
CENTRAL MOUNTAIN RANGE-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE SHOWERS NONE TSTMS
CHANCE PRECIP (%) 0 30 0 60
TEMP (24H TREND) 68 (-2) 88 (+4) 67 88
RH % (24H TREND) 98 (+3) 64 (+1) 99 64
WIND 20FT/EARLY(MPH) E 14 E 10 NE 13 NE 10
WIND 20FT/LATE(MPH) E 11 E 11 NE 10 NE 10
MIXING HGT(FT-AGL/MSL) 7430 6250
TRANSPORT WND (MPH) E 12 E 12
VENT RATE (KT-FT) 74300 62500
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-200800-
CAYEY MOUNTAIN RANGE-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 30 20
TEMP (24H TREND) 69 (-4) 85 (+2) 69 86
RH % (24H TREND) 99 (+3) 65 (0) 97 61
WIND 20FT/EARLY(MPH) E 12 E 11 NE 10 NE 9
WIND 20FT/LATE(MPH) E 11 E 12 NE 8 E 10
MIXING HGT(FT-AGL/MSL) 5730 5970
TRANSPORT WND (MPH) E 17 E 12
VENT RATE (KT-FT) 85950 59700
DISPERSION 5 5
DSI 5 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-200800-
VIEQUES-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 30 60
TEMP (24H TREND) 79 (-1) 90 (+1) 78 90
RH % (24H TREND) 83 (+1) 57 (-2) 82 55
WIND 20FT/EARLY(MPH) E 18 E 16 NE 16 NE 9
WIND 20FT/LATE(MPH) E 16 E 14 NE 14 NE 9
MIXING HGT(FT-AGL/MSL) 3200 3070
TRANSPORT WND (MPH) E 18 E 12
VENT RATE (KT-FT) 51200 30700
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-200800-
CULEBRA-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 30 50
TEMP (24H TREND) 78 (-2) 90 (+2) 77 91
RH % (24H TREND) 89 (+5) 59 (-5) 87 58
WIND 20FT/EARLY(MPH) E 17 E 16 NE 16 NE 9
WIND 20FT/LATE(MPH) E 16 E 14 NE 14 NE 9
MIXING HGT(FT-AGL/MSL) 3260 3050
TRANSPORT WND (MPH) E 20 E 12
VENT RATE (KT-FT) 55420 30500
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-200800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 0 40
TEMP (24H TREND) 74 (-2) 92 (+1) 73 93
RH % (24H TREND) 85 (+6) 49 (-3) 88 44
WIND 20FT/EARLY(MPH) E 14 E 18 E 14 E 12
WIND 20FT/LATE(MPH) E 11 E 19 NE 13 SE 12
MIXING HGT(FT-AGL/MSL) 6260 5290
TRANSPORT WND (MPH) E 15 E 7
VENT RATE (KT-FT) 81380 31740
DISPERSION 5 5
DSI 4 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-200800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 30 40
TEMP (24H TREND) 75 (-2) 86 (0) 75 89
RH % (24H TREND) 95 (+6) 63 (-1) 92 60
WIND 20FT/EARLY(MPH) E 18 E 16 NE 14 NE 9
WIND 20FT/LATE(MPH) E 17 E 14 NE 13 NE 9
MIXING HGT(FT-AGL/MSL) 3160 2900
TRANSPORT WND (MPH) E 18 E 10
VENT RATE (KT-FT) 50560 26100
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-200800-
ST CROIX-
330 PM AST SUN JUL 19 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 30 20
TEMP (24H TREND) 76 (-1) 90 (+1) 75 89
RH % (24H TREND) 93 (+2) 59 (-3) 94 59
WIND 20FT/EARLY(MPH) E 18 E 16 NE 14 NE 9
WIND 20FT/LATE(MPH) E 17 E 14 NE 13 NE 8
MIXING HGT(FT-AGL/MSL) 4810 3920
TRANSPORT WND (MPH) E 17 E 9
VENT RATE (KT-FT) 72150 31360
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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