869
FNUS72 KNHC 200923
FWSNHC
SPOT FORECAST FOR COAST GUARD GI FORECAST...USCG
NWS NATIONAL HURRICANE CENTER MIAMI FL
1000 EDT MON OCT 20 2025
FORECAST IS BASED ON FORECAST START TIME OF 0600 EDT ON OCTOBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NWS
NATIONAL HURRICANE CENTER/TROPICAL ANALYSIS AND FORECAST
BRANCH AT (305)229-4425.
DISCUSSION
FORECAST DISCUSSION VALID 12Z 10/20/25 - 12Z
10/21/25: SCATTERED RAIN SHOWERS AND ISOLATED THUNDERSTORMS WILL
PERSIST THROUGH MUCH OF THE FORECAST PERIOD. SURFACE WINDS WILL
INCREASE SLIGHTLY COMPARED TO THE LAST SEVERAL DAYS WITH ENE
SUSTAINED WINDS AROUND 10 TO 12 KNOTS, GUSTING TO 20 KNOTS. GUSTY
WINDS WILL CONTINUE THROUGH THE OVERNIGHT HOURS AND BEYOND.
LOOKING AHEAD, WE ARE TRACKING A STRONG TROPICAL WAVE CURRENTLY
IN THE EASTERN CARIBBEAN. THE CURRENT OUTLOOK GIVES THE SYSTEM A
70% CHANCE OF A TROPICAL SYSTEM DEVELOPING IN THE CARIBBEAN BY
THE MIDDLE OR LATTER PORTION OF THIS WEEK. REGARDLESS OF
FORMATION, HEAVY RAINS AND INCREASINGLY GUSTY WINDS ARE LIKELY
OVER THE REGION BY MID- WEEK.
MATTHEW TOWN (MYIG 21.0N 73.7W):
12Z-18Z BKN025 WND ENE 10G20KT.
18Z-22Z BKN020 SHRA ISOL TSRA FL450 WND ENE 10G20KT.
22Z-06Z BKN022 -RA WND ENE 12G20KT.
06Z-12Z BKN025 WND ENE 12G20KT.
LATITUDE = 20.96
LONGITUDE = 73.69
TODAY
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
MAX TEMPERATURE.....AROUND 85.
SURFACE WINDS (KTS).EAST NORTHEAST WINDS 5 TO 10 KNOTS.
SWELL HEIGHT........NORTH SWELL 1 FEET.
WAVE HEIGHT.........4 FEET.
WAVE HEIGHT.........4 FEET.
WAVE PERIOD.........12 SECONDS.
WAVE PERIOD.........12 SECONDS.
WIND WAVE...........2 FEET.
SEA SURFACE TEMP....86 DEGREES FAHRENHEIT.
TIME (EDT) 6 AM 9 AM NOON 3 PM
SKY (%).........84 90 90 89
TEMP............82 84 84 85
SFC WIND (KTS)..E 9G15 E 8G15 E 8G15 E 5G8
SWELL HGT (FT)..N 1 N 1 N 1 N 1
WAVE PERIOD (S).12 12 12 12
WIND WAVE (FT)..2 2 2 2
WAVE HEIGHT (FT)4 4 3 3
SST (F).........86 86 86 86
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
MIN TEMPERATURE.....AROUND 81.
SURFACE WINDS (KTS).NORTHEAST WINDS 7 TO 12 KNOTS.
SWELL HEIGHT........NORTH SWELL 1 FEET.
WAVE HEIGHT.........3 FEET.
WAVE HEIGHT.........3 FEET.
WAVE PERIOD.........12 SECONDS DECREASING TO 7 SECONDS EARLY IN THE
EVENING.
WAVE PERIOD.........12 SECONDS DECREASING TO 7 SECONDS EARLY IN THE
EVENING.
WIND WAVE...........2 FEET.
SEA SURFACE TEMP....86 DEGREES FAHRENHEIT.
TIME (EDT) 6 PM 9 PM MIDNGT 3 AM
SKY (%).........89 55 55 79
TEMP............85 82 82 81
SFC WIND (KTS)..NE 7G9 NE 10G12 E 10G14 E 10G12
SWELL HGT (FT)..N 1 N 1 N 1 N 1
WAVE PERIOD (S).12 7 7 4
WIND WAVE (FT)..2 2 2 2
WAVE HEIGHT (FT)3 3 3 3
SST (F).........86 86 86 86
TUESDAY
SKY/WEATHER.........CLOUDY (85-95 PERCENT). SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS EARLY IN THE MORNING.
MAX TEMPERATURE.....AROUND 85.
SURFACE WINDS (KTS).EAST WINDS 8 TO 12 KNOTS.
SWELL HEIGHT........NORTH SWELL 1 FEET.
WAVE HEIGHT.........3 FEET.
WAVE HEIGHT.........3 FEET.
WAVE PERIOD.........4 SECONDS.
WAVE PERIOD.........4 SECONDS.
WIND WAVE...........2 FEET INCREASING TO 4 FEET EARLY IN THE
MORNING, THEN DECREASING TO 2 FEET LATE IN THE
AFTERNOON.
SEA SURFACE TEMP....86 DEGREES FAHRENHEIT.
TIME (EDT) 6 AM 9 AM NOON 3 PM
SKY (%).........79 99 99 100
TEMP............81 83 83 85
SFC WIND (KTS)..E 11G15 NE 10G14 E 12G16 E 10G12
SWELL HGT (FT)..N 1 N 1 N 1 N 1
WAVE PERIOD (S).4 4 4 4
WIND WAVE (FT)..2 4 4 2
WAVE HEIGHT (FT)3 3 3 3
SST (F).........86 86 86 86
FORECASTER...AL/JW
REQUESTED BY...AIR STATION MIAMI
TYPE OF REQUEST...MARINE
.TAG 2523592.6/NHC
.DELDT 10/20/25
.FORMATTERVERSION 2.0.0
.EMAIL SARAH.R.WRIGHT@USCG.MIL,LANDON.W.KLOPFENSTEIN@USCG.MIL
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