003
FNUS72 KNHC 210926
FWSNHC
SPOT FORECAST FOR COAST GUARD GI FORECAST...USCG
NWS NATIONAL HURRICANE CENTER MIAMI FL
1000 EDT TUE OCT 21 2025
FORECAST IS BASED ON FORECAST START TIME OF 0600 EDT ON OCTOBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NWS
NATIONAL HURRICANE CENTER/TROPICAL ANALYSIS AND FORECAST
BRANCH AT (305)229-4425.
DISCUSSION
FORECAST DISCUSSION VALID 12Z 10/21/25 - 12Z
10/22/25: RAIN SHOWERS AND THUNDERSTORM ACTIVITY WILL BEGIN TO
INCREASE IN COVERAGE TODAY THROUGH THE NEXT FEW DAYS AHEAD OF A
POTENTIAL TROPICAL SYSTEM IN THE CARIBBEAN. SURFACE WINDS WILL
REMAIN EASTERLY BETWEEN 10 TO 15 KNOTS TODAY, GUSTING TO 20 TO
PERHAPS 25 KNOTS. STRONGER WIND GUSTS MAY ACCOMPANY THUNDERSTORM
ACTIVITY.
WE CONTINUE TO MONITOR AN AREA OF LOW PRESSURE IN THE CARIBBEAN
WITH A HIGH CHANCE FOR TROPICAL DEVELOPMENT. HEAVY RAINS AND
STRONG WIND GUSTS ARE LIKELY OVER MATTHEW TOWN BY WEDNESDAY TO
THURSDAY.
MATTHEW TOWN (MYIG 21.0N 73.7W):
12Z-18Z BKN022 -RA WND E 12G22KT.
18Z-22Z BKN025 SHRA ISOL TSRA TOP FL450 WND E 12G22KT.
22Z-12Z BKN025 -RA WND E 15G22KT.
LATITUDE = 20.96
LONGITUDE = 73.69
TODAY
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS EARLY IN THE
MORNING.
MAX TEMPERATURE.....AROUND 84.
SURFACE WINDS (KTS).EAST WINDS 8 TO 11 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.
SEA SURFACE TEMP....86 DEGREES FAHRENHEIT.
TIME (EDT) 6 AM 9 AM NOON 3 PM
SKY (%).........75 93 93 99
TEMP............81 83 83 84
SFC WIND (KTS)..E 10G13 E 10G15 E 11G16 E 8G11
SWELL HGT (FT)..N 1 N 1 N 1 N 1
WAVE PERIOD (S).4 4 4 4
WIND WAVE (FT)..2 2 2 2
WAVE HEIGHT (FT)3 3 3 3
SST (F).........86 86 86 86
TONIGHT
SKY/WEATHER.........CLOUDY (90-100 PERCENT). SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS EARLY IN THE EVENING.
MIN TEMPERATURE.....AROUND 82.
SURFACE WINDS (KTS).EAST WINDS 9 TO 13 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
EVENING, THEN DECREASING TO 2 FEET OVERNIGHT.
SEA SURFACE TEMP....86 DEGREES FAHRENHEIT.
TIME (EDT) 6 PM 9 PM MIDNGT 3 AM
SKY (%).........99 99 99 90
TEMP............84 83 83 82
SFC WIND (KTS)..E 10G13 NE 10G13 E 13G17 E 10G13
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
WEDNESDAY
SKY/WEATHER.........CLOUDY (85-95 PERCENT) THEN BECOMING PARTLY
SUNNY (60-70 PERCENT).
MAX TEMPERATURE.....AROUND 85.
SURFACE WINDS (KTS).EAST WINDS 9 TO 14 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.
SEA SURFACE TEMP....86 DEGREES FAHRENHEIT.
TIME (EDT) 6 AM 9 AM NOON 3 PM
SKY (%).........90 66 66 66
TEMP............82 84 84 85
SFC WIND (KTS)..E 9G12 E 10G15 E 14G19 E 13G18
SWELL HGT (FT)..N 1 N 1 N 1 N 1
WAVE PERIOD (S).4 4 4 4
WIND WAVE (FT)..2 4 4 4
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 2523592.7/NHC
.DELDT 10/21/25
.FORMATTERVERSION 2.0.0
.EMAIL LANDON.W.KLOPFENSTEIN@USCG.MIL,SARAH.R.WRIGHT@USCG.MIL
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