735
FNCA52 TJSJ 220758
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
358 AM AST TUE JUL 22 2025
DISCUSSION
TODAY, BREEZY CONDITIONS ARE EXPECTED MAINLY OVER COASTAL AREAS OF
THE LOCAL ISLANDS, WITH WINDS BETWEEN 16 - 20 MPH AND GUSTS UP TO
26 MPH. AS DRIER AIR MASS FILTERS INTO THE REGION, RELATIVE
HUMIDITIES ARE EXPECTED TO DROP ONCE AGAIN BETWEEN 48 - 50 % OVER
THE SOUTHERN COASTAL PLAINS OF PUERTO RICO, BELOW THRESHOLDS.
ADDITIONALLY, BASED ON THE LATEST REPORT OF THE U.S. DROUGHT
MONITOR, THIS PARTICULAR AREA CONTINUES ABNORMALLY DRY. STATIONS
IN CABO ROJO AND GUANICA CONTINUE REPORTING KDBI VALUES OF 616 AND
664, MEETING FIRE WEATHER CRITERIA. GIVEN THESE FACTORS, THE FIRE
DANGER RISK WILL BE ELEVATED TODAY ACROSS SOUTHERN PORTIONS OF
PUERTO RICO. A FIRE DANGER STATEMENT (RFDSJU) WILL BE ISSUE FOR
THE SOUTHERN COASTAL PLAINS OF PUERTO RICO.
FIRE AND EMERGENCY OFFICIALS SHOULD BE AWARE THAT WEATHER
CONDITIONS ARE BECOMING MORE CONDUCIVE FOR THE IGNITION AND
SPREAD OF WILDFIRES.
PRZ014-230800-
SOUTHEAST COASTAL PLAINS-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 10
TEMP (24H TREND) 93 (+3) 75 (-2) 93
RH % (24H TREND) 48 (-8) 87 (-1) 47
WIND 20FT/EARLY(MPH) E 17 G22 E 14 G18 E 19 G25
WIND 20FT/LATE(MPH) E 17 G22 E 14 G18 E 19 G25
MIXING HGT(FT-AGL/MSL)5190 5510
TRANSPORT WND (MPH) E 18 E 23
VENT RATE (KT-FT) 83040 110200
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-230800-
SOUTHERN HILLS-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 0 30
TEMP (24H TREND) 88 (+3) 71 (-3) 89
RH % (24H TREND) 60 (-1) 97 (+4) 58
WIND 20FT/EARLY(MPH) E 13 E 14 E 17
WIND 20FT/LATE(MPH) E 13 E 14 E 17
MIXING HGT(FT-AGL/MSL)5540 6100
TRANSPORT WND (MPH) E 18 E 23
VENT RATE (KT-FT) 88640 122000
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-230800-
NORTH COASTAL PLAINS-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 0 20
TEMP (24H TREND) 91 (+3) 75 (-1) 91
RH % (24H TREND) 60 (-4) 97 (0) 63
WIND 20FT/EARLY(MPH) E 20 G23 E 19 E 23 G25
WIND 20FT/LATE(MPH) E 20 G23 E 19 E 23 G25
MIXING HGT(FT-AGL/MSL)5190 5280
TRANSPORT WND (MPH) E 18 E 23
VENT RATE (KT-FT) 83040 105600
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-230800-
NORTHERN HILLS-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE TSTMS NONE SHOWERS
CHANCE PRECIP (%) 50 0 20
TEMP (24H TREND) 89 (+2) 72 (-2) 89
RH % (24H TREND) 61 (-4) 99 (0) 65
WIND 20FT/EARLY(MPH) E 18 E 17 E 20
WIND 20FT/LATE(MPH) E 18 E 17 E 20
MIXING HGT(FT-AGL/MSL)6240 6400
TRANSPORT WND (MPH) E 15 E 20
VENT RATE (KT-FT) 81120 108800
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-230800-
WEST COAST-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 50
TEMP (24H TREND) 92 (+1) 72 (-2) 93
RH % (24H TREND) 56 (-3) 98 (+3) 56
WIND 20FT/EARLY(MPH) E 14 E 13 E 18
WIND 20FT/LATE(MPH) E 14 E 13 E 18
MIXING HGT(FT-AGL/MSL)4630 4880
TRANSPORT WND (MPH) E 13 E 14
VENT RATE (KT-FT) 50930 58560
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-230800-
EASTERN INTERIOR-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 50
TEMP (24H TREND) 89 (+3) 73 (-2) 89
RH % (24H TREND) 64 (+2) 97 (0) 64
WIND 20FT/EARLY(MPH) E 13 E 16 E 17
WIND 20FT/LATE(MPH) E 13 E 16 E 17
MIXING HGT(FT-AGL/MSL)5840 5710
TRANSPORT WND (MPH) E 18 E 23
VENT RATE (KT-FT) 93440 114200
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-230800-
LUQUILLO MOUNTAIN RANGE-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 50
TEMP (24H TREND) 83 (+3) 70 (-3) 84
RH % (24H TREND) 73 (-1) 100 (+1) 73
WIND 20FT/EARLY(MPH) E 12 E 12 E 14 G17
WIND 20FT/LATE(MPH) E 12 E 12 E 14 G17
MIXING HGT(FT-AGL/MSL)4400 4350
TRANSPORT WND (MPH) E 20 E 24
VENT RATE (KT-FT) 74800 91350
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-230800-
CENTRAL MOUNTAIN RANGE-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR CLEAR PCLDY
PRECIP TYPE TSTMS NONE SHOWERS
CHANCE PRECIP (%) 50 0 40
TEMP (24H TREND) 87 (+4) 69 (-2) 87
RH % (24H TREND) 63 (-3) 99 (+2) 64
WIND 20FT/EARLY(MPH) E 11 E 11 E 13
WIND 20FT/LATE(MPH) E 11 E 11 E 13
MIXING HGT(FT-AGL/MSL)6860 7230
TRANSPORT WND (MPH) E 13 E 16
VENT RATE (KT-FT) 75460 101220
DISPERSION 5 5
DSI 5 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-230800-
CAYEY MOUNTAIN RANGE-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 50
TEMP (24H TREND) 84 (+2) 71 (-2) 84
RH % (24H TREND) 70 (+4) 100 (0) 69
WIND 20FT/EARLY(MPH) E 12 E 12 E 16
WIND 20FT/LATE(MPH) E 12 E 12 E 16
MIXING HGT(FT-AGL/MSL)5150 4990
TRANSPORT WND (MPH) E 20 E 25
VENT RATE (KT-FT) 87550 109780
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-230800-
VIEQUES-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 30
TEMP (24H TREND) 90 (+2) 78 (0) 90
RH % (24H TREND) 61 (+2) 91 (-1) 61
WIND 20FT/EARLY(MPH) E 17 G20 E 19 G23 E 19 G23
WIND 20FT/LATE(MPH) E 17 G20 E 19 G23 E 19 G23
MIXING HGT(FT-AGL/MSL)3550 3450
TRANSPORT WND (MPH) E 22 E 25
VENT RATE (KT-FT) 67450 75900
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-230800-
CULEBRA-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 40
TEMP (24H TREND) 91 (+2) 78 (-1) 92
RH % (24H TREND) 62 (-1) 92 (+1) 62
WIND 20FT/EARLY(MPH) E 16 G20 E 19 G23 E 19 G23
WIND 20FT/LATE(MPH) E 16 G20 E 19 G23 E 19 G23
MIXING HGT(FT-AGL/MSL)3570 3520
TRANSPORT WND (MPH) E 22 E 25
VENT RATE (KT-FT) 67830 77440
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-230800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 0 10
TEMP (24H TREND) 93 (+2) 75 (-2) 93
RH % (24H TREND) 50 (-4) 87 (+1) 48
WIND 20FT/EARLY(MPH) SE 20 G26 E 19 G23 E 26 G32
WIND 20FT/LATE(MPH) SE 20 G26 E 19 G23 E 26 G32
MIXING HGT(FT-AGL/MSL)5080 5620
TRANSPORT WND (MPH) E 22 E 23
VENT RATE (KT-FT) 96520 112400
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-230800-
SAINT THOMAS AND SAINT JOHN-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 30
TEMP (24H TREND) 88 (+3) 76 (-3) 88
RH % (24H TREND) 67 (-2) 94 (+1) 68
WIND 20FT/EARLY(MPH) E 16 G20 E 19 G24 E 19 G23
WIND 20FT/LATE(MPH) E 16 G20 E 19 G24 E 19 G23
MIXING HGT(FT-AGL/MSL)3520 3470
TRANSPORT WND (MPH) E 21 E 26
VENT RATE (KT-FT) 63360 79810
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-230800-
ST CROIX-
358 AM AST TUE JUL 22 2025
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 40
TEMP (24H TREND) 89 (+2) 77 (-2) 89
RH % (24H TREND) 65 (-1) 92 (+1) 65
WIND 20FT/EARLY(MPH) E 16 G20 E 19 G23 E 19 G24
WIND 20FT/LATE(MPH) E 16 G20 E 19 G23 E 19 G24
MIXING HGT(FT-AGL/MSL)4550 4440
TRANSPORT WND (MPH) E 24 E 30
VENT RATE (KT-FT) 95550 115440
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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