867
FNCA52 TJSJ 200730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST MON JUL 20 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.
PRZ014-202000-
SOUTHEAST COASTAL PLAINS-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 40
TEMP (24H TREND) 92 (+1) 73 (-4) 92
RH % (24H TREND) 46 (-4) 87 (+4) 46
WIND 20FT/EARLY(MPH) E 13 NE 13 G21 NE 11
WIND 20FT/LATE(MPH) E 18 G27 NE 8 E 14 G23
MIXING HGT(FT-AGL/MSL)5550 5280
TRANSPORT WND (MPH) E 16 E 10
VENT RATE (KT-FT) 77700 47520
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-202000-
SOUTHERN HILLS-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 10 0 50
TEMP (24H TREND) 90 (+3) 69 (-5) 90
RH % (24H TREND) 56 (-2) 96 (+7) 57
WIND 20FT/EARLY(MPH) E 13 NE 11 NE 10
WIND 20FT/LATE(MPH) E 14 NE 10 E 13
MIXING HGT(FT-AGL/MSL)6170 5890
TRANSPORT WND (MPH) E 13 NE 10
VENT RATE (KT-FT) 67870 53010
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-202000-
NORTH COASTAL PLAINS-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 40
TEMP (24H TREND) 91 (+1) 73 (-4) 91
RH % (24H TREND) 57 (-3) 95 (+6) 61
WIND 20FT/EARLY(MPH) E 17 E 16 E 13
WIND 20FT/LATE(MPH) NE 19 E 11 NE 14
MIXING HGT(FT-AGL/MSL)4690 4680
TRANSPORT WND (MPH) E 17 NE 13
VENT RATE (KT-FT) 70350 51480
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-202000-
NORTHERN HILLS-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 40
TEMP (24H TREND) 89 (0) 71 (-3) 89
RH % (24H TREND) 60 (+1) 97 (+4) 65
WIND 20FT/EARLY(MPH) E 14 E 13 E 12
WIND 20FT/LATE(MPH) NE 17 E 9 NE 12
MIXING HGT(FT-AGL/MSL)5740 5290
TRANSPORT WND (MPH) E 13 NE 13
VENT RATE (KT-FT) 63140 58190
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-202000-
WEST COAST-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 40 50
TEMP (24H TREND) 92 (+1) 71 (-3) 93
RH % (24H TREND) 59 (-2) 98 (+8) 56
WIND 20FT/EARLY(MPH) E 13 E 16 E 12
WIND 20FT/LATE(MPH) E 13 E 13 SE 16
MIXING HGT(FT-AGL/MSL)5720 5200
TRANSPORT WND (MPH) E 8 E 9
VENT RATE (KT-FT) 40040 41600
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-202000-
EASTERN INTERIOR-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 20 50
TEMP (24H TREND) 90 (+2) 71 (-4) 91
RH % (24H TREND) 56 (-2) 95 (+5) 58
WIND 20FT/EARLY(MPH) E 13 NE 12 NE 10
WIND 20FT/LATE(MPH) E 13 NE 9 NE 11
MIXING HGT(FT-AGL/MSL)6510 6500
TRANSPORT WND (MPH) E 14 NE 12
VENT RATE (KT-FT) 78120 65000
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-202000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 60
TEMP (24H TREND) 86 (+5) 69 (-4) 86
RH % (24H TREND) 63 (-6) 98 (+5) 65
WIND 20FT/EARLY(MPH) E 12 NE 10 NE 8
WIND 20FT/LATE(MPH) E 12 NE 6 NE 10
MIXING HGT(FT-AGL/MSL)4650 4930
TRANSPORT WND (MPH) E 15 E 10
VENT RATE (KT-FT) 60450 44370
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-202000-
CENTRAL MOUNTAIN RANGE-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 50
TEMP (24H TREND) 88 (+3) 67 (-4) 87
RH % (24H TREND) 63 (+1) 99 (+5) 67
WIND 20FT/EARLY(MPH) E 10 NE 13 NE 11
WIND 20FT/LATE(MPH) NE 11 E 10 NE 11
MIXING HGT(FT-AGL/MSL)7060 6210
TRANSPORT WND (MPH) E 9 E 12
VENT RATE (KT-FT) 56480 62100
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-202000-
CAYEY MOUNTAIN RANGE-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 40
TEMP (24H TREND) 86 (+3) 69 (-4) 87
RH % (24H TREND) 62 (-2) 99 (+3) 64
WIND 20FT/EARLY(MPH) E 11 NE 10 NE 10
WIND 20FT/LATE(MPH) E 12 NE 8 NE 11
MIXING HGT(FT-AGL/MSL)5510 6100
TRANSPORT WND (MPH) E 15 NE 13
VENT RATE (KT-FT) 71630 67100
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-202000-
VIEQUES-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 60
TEMP (24H TREND) 90 (+1) 78 (-2) 90
RH % (24H TREND) 57 (-2) 84 (+1) 56
WIND 20FT/EARLY(MPH) E 17 NE 16 NE 10
WIND 20FT/LATE(MPH) E 14 NE 12 NE 11
MIXING HGT(FT-AGL/MSL)3440 3120
TRANSPORT WND (MPH) E 18 E 12
VENT RATE (KT-FT) 55040 31200
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-202000-
CULEBRA-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 60
TEMP (24H TREND) 90 (+2) 77 (-3) 91
RH % (24H TREND) 58 (-6) 87 (+4) 59
WIND 20FT/EARLY(MPH) E 16 NE 16 NE 11
WIND 20FT/LATE(MPH) E 14 NE 12 NE 11
MIXING HGT(FT-AGL/MSL)3360 2930
TRANSPORT WND (MPH) E 20 E 12
VENT RATE (KT-FT) 57120 29300
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-202000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 20 70
TEMP (24H TREND) 92 (+1) 72 (-4) 93
RH % (24H TREND) 50 (-3) 91 (+10) 45
WIND 20FT/EARLY(MPH) E 14 G22 E 12 E 12
WIND 20FT/LATE(MPH) E 17 NE 12 S 16
MIXING HGT(FT-AGL/MSL)5950 5070
TRANSPORT WND (MPH) E 13 E 7
VENT RATE (KT-FT) 65450 30420
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-202000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 60
TEMP (24H TREND) 87 (+1) 76 (-3) 89
RH % (24H TREND) 60 (-4) 89 (+5) 61
WIND 20FT/EARLY(MPH) E 17 NE 14 NE 11
WIND 20FT/LATE(MPH) E 14 NE 12 NE 11
MIXING HGT(FT-AGL/MSL)3520 2900
TRANSPORT WND (MPH) E 20 E 10
VENT RATE (KT-FT) 59840 26100
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-202000-
ST CROIX-
330 AM AST MON JUL 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 40
TEMP (24H TREND) 89 (+1) 77 (-2) 89
RH % (24H TREND) 60 (-4) 86 (0) 60
WIND 20FT/EARLY(MPH) E 16 NE 13 NE 10
WIND 20FT/LATE(MPH) E 14 NE 11 NE 11
MIXING HGT(FT-AGL/MSL)4910 4220
TRANSPORT WND (MPH) E 18 E 9
VENT RATE (KT-FT) 78560 33760
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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