524
FNCA52 TJSJ 100844
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
444 AM AST SAT JAN 10 2026
DISCUSSION
KBDI VALUES IN CABO ROJO ARE AROUND 603, WHILE IN CAMP SANTIAGO,
THEY ARE AROUND 533. THE DRYING TREND CONTINUES ACROSS THE
SOUTHERN PLAINS AND AT MOST LOCAL STATIONS IN THE USVI AND PR. RH
VALUES WILL DROP NEAR CRITICAL VALUES; HOWEVER, WE EXPECT SHOWER
ACTIVITY TO FORM OVER THE SOUTHWEST QUADRANT FROM NOON ONWARD.
ADDITIONALLY, WINDS WILL RANGE BETWEEN 10 AND 17 MPH WITH HIGHER
GUSTS DUE TO SEA BREEZE. WE ENCOURAGE THE FIRE-WEATHER COMMUNITY
TO MONITOR THE DRYING TREND, AS CONDITIONS COULD WORSEN IF NO
RAINFALL OCCURS OVER THESE LOCATIONS.
PRZ014-110845-
SOUTHEAST COASTAL PLAINS-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 30 10 0
TEMP (24H TREND) 87 (+2) 68 (-1) 88
RH % (24H TREND) 47 (-8) 93 (+2) 45
WIND 20FT/EARLY(MPH) E 17 G22 NE 11 E 14 G20
WIND 20FT/LATE(MPH) E 17 G22 NE 11 E 14 G20
MIXING HGT(FT-AGL/MSL)5010 5090
TRANSPORT WND (MPH) E 13 E 13
VENT RATE (KT-FT) 55110 55990
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-110845-
SOUTHERN HILLS-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 10
TEMP (24H TREND) 83 (+3) 65 (-2) 83
RH % (24H TREND) 61 (-9) 97 (+3) 60
WIND 20FT/EARLY(MPH) E 12 NE 10 E 11
WIND 20FT/LATE(MPH) E 12 NE 10 E 11
MIXING HGT(FT-AGL/MSL)5040 5290
TRANSPORT WND (MPH) E 12 E 12
VENT RATE (KT-FT) 50400 52900
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-110845-
NORTH COASTAL PLAINS-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 40 30
TEMP (24H TREND) 85 (+1) 68 (-2) 85
RH % (24H TREND) 64 (-7) 100 (+3) 63
WIND 20FT/EARLY(MPH) E 16 E 12 E 14 G17
WIND 20FT/LATE(MPH) E 16 E 12 E 14 G17
MIXING HGT(FT-AGL/MSL)4490 4930
TRANSPORT WND (MPH) E 15 E 14
VENT RATE (KT-FT) 58370 59160
DISPERSION 5 5
DSI 5 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-110845-
NORTHERN HILLS-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 10
TEMP (24H TREND) 84 (+2) 66 (-1) 84
RH % (24H TREND) 64 (-6) 100 (+1) 61
WIND 20FT/EARLY(MPH) NE 13 E 12 NE 12
WIND 20FT/LATE(MPH) NE 13 E 12 NE 12
MIXING HGT(FT-AGL/MSL)4780 5080
TRANSPORT WND (MPH) E 14 E 13
VENT RATE (KT-FT) 57360 55880
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-110845-
WEST COAST-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 60 40
TEMP (24H TREND) 86 (0) 66 (-2) 87
RH % (24H TREND) 60 (-3) 99 (+3) 59
WIND 20FT/EARLY(MPH) E 11 NE 14 SE 12
WIND 20FT/LATE(MPH) E 11 NE 14 SE 12
MIXING HGT(FT-AGL/MSL)4200 4550
TRANSPORT WND (MPH) E 9 E 8
VENT RATE (KT-FT) 33600 31850
DISPERSION 5 5
DSI 5 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-110845-
EASTERN INTERIOR-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 30
TEMP (24H TREND) 83 (+2) 66 (-2) 84
RH % (24H TREND) 65 (-8) 99 (+1) 64
WIND 20FT/EARLY(MPH) E 11 E 10 E 10
WIND 20FT/LATE(MPH) E 11 E 10 E 10
MIXING HGT(FT-AGL/MSL)5080 5670
TRANSPORT WND (MPH) E 13 E 12
VENT RATE (KT-FT) 55880 56700
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-110845-
LUQUILLO MOUNTAIN RANGE-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 30
TEMP (24H TREND) 79 (+2) 64 (-3) 79
RH % (24H TREND) 71 (-5) 100 (+1) 70
WIND 20FT/EARLY(MPH) E 10 E 8 E 9
WIND 20FT/LATE(MPH) E 10 E 8 E 9
MIXING HGT(FT-AGL/MSL)4200 4220
TRANSPORT WND (MPH) E 13 E 14
VENT RATE (KT-FT) 46200 50640
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-110845-
CENTRAL MOUNTAIN RANGE-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 10 30
TEMP (24H TREND) 82 (+4) 62 (-3) 82
RH % (24H TREND) 63 (-7) 99 (+1) 61
WIND 20FT/EARLY(MPH) NE 10 E 11 E 9
WIND 20FT/LATE(MPH) NE 10 E 11 E 9
MIXING HGT(FT-AGL/MSL)5450 5530
TRANSPORT WND (MPH) E 10 E 9
VENT RATE (KT-FT) 49050 44240
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-110845-
CAYEY MOUNTAIN RANGE-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 10
TEMP (24H TREND) 79 (+2) 65 (-1) 80
RH % (24H TREND) 69 (-7) 99 (0) 68
WIND 20FT/EARLY(MPH) E 11 NE 8 E 9
WIND 20FT/LATE(MPH) E 11 NE 8 E 9
MIXING HGT(FT-AGL/MSL)5020 5340
TRANSPORT WND (MPH) E 14 E 13
VENT RATE (KT-FT) 60240 58740
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-110845-
VIEQUES-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 30
TEMP (24H TREND) 85 (0) 70 (-2) 85
RH % (24H TREND) 60 (-3) 96 (+1) 60
WIND 20FT/EARLY(MPH) E 12 NE 13 E 12
WIND 20FT/LATE(MPH) E 12 NE 13 E 12
MIXING HGT(FT-AGL/MSL)3400 3570
TRANSPORT WND (MPH) E 15 E 15
VENT RATE (KT-FT) 44200 46410
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-110845-
CULEBRA-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 30
TEMP (24H TREND) 86 (+1) 72 (-2) 86
RH % (24H TREND) 60 (-5) 93 (+1) 60
WIND 20FT/EARLY(MPH) E 12 E 12 E 12
WIND 20FT/LATE(MPH) E 12 E 12 E 12
MIXING HGT(FT-AGL/MSL)3480 3430
TRANSPORT WND (MPH) E 15 E 16
VENT RATE (KT-FT) 45240 48020
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-110845-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 10
TEMP (24H TREND) 88 (+2) 67 (-2) 88
RH % (24H TREND) 47 (-2) 94 (+5) 47
WIND 20FT/EARLY(MPH) E 16 G20 NE 16 G18 SE 14 G18
WIND 20FT/LATE(MPH) E 16 G20 NE 16 G18 SE 14 G18
MIXING HGT(FT-AGL/MSL)4710 5000
TRANSPORT WND (MPH) E 9 E 9
VENT RATE (KT-FT) 37680 40000
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-110845-
SAINT THOMAS AND SAINT JOHN-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 20
TEMP (24H TREND) 85 (+1) 71 (-3) 85
RH % (24H TREND) 61 (-5) 95 (+2) 60
WIND 20FT/EARLY(MPH) E 12 E 12 E 13 G17
WIND 20FT/LATE(MPH) E 12 E 12 E 13 G17
MIXING HGT(FT-AGL/MSL)3560 3540
TRANSPORT WND (MPH) E 15 E 17
VENT RATE (KT-FT) 46280 53100
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-110845-
ST CROIX-
444 AM AST SAT JAN 10 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 10
TEMP (24H TREND) 86 (+1) 72 (-2) 86
RH % (24H TREND) 61 (-4) 91 (-1) 61
WIND 20FT/EARLY(MPH) E 12 NE 12 E 12
WIND 20FT/LATE(MPH) E 12 NE 12 E 12
MIXING HGT(FT-AGL/MSL)4390 4410
TRANSPORT WND (MPH) E 16 E 16
VENT RATE (KT-FT) 61460 61740
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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