Harbour Island Weather
Average Weather Information
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Mean Daily Maximum Temperature - F° |
| 76 | 79 | 80 | 82 | 86 | 86 | 89 | 90 | 89 | 88 | 83 | 80 |
| Mean Daily Minimum Temperature - F° |
| 65 | 68 | 66 | 69 | 73 | 76 | 79 | 78 | 74 | 75 | 73 | 68 |
| Monthly Rainfall - Inches |
| 3.4 | 3.2 | 2.2 | .96 | 4.0 | 1.2 | 3.0 | 5.5 | 1.3 | 4.3 | 5.4 | 3.1 |
| Number of Rain Days |
| 6 | 4 | 3 | 3 | 5 | 2 | 4 | 7 | 4 | 6 | 8 | 7 |
Currently: Partly Cloudy: 83F
Currently in Dunmore Town, BS: 83 °F and Partly Cloudy
8/11/2020 Forecast
High: 87 F Low: 82 F A thunderstorm in spots 
8/12/2020 Forecast
High: 87 F Low: 83 F Mostly sunny 
Harbour Island Accuweather 25 Day Forecast
Intellicast Caribbean Radar Map
Real Time GOES Imagery - Definitive Weather Satellite Views of the Bahamas and Caribbean:
GOES-East - Regional sector view: Caribbean
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Sea Surface Temperature
Space, Science & Engineering's Interactive Geostationary Real Time Satellite Images
Active tropical cyclones in the Atlantic, Caribbean, and the Gulf of Mexico
000
ABNT20 KNHC 112328
TWOAT
Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 PM EDT Tue Aug 11 2020
For the North Atlantic...Caribbean Sea and the Gulf of Mexico:
The National Hurricane Center is issuing advisories on newly formed
Tropical Depression Eleven, located over the central tropical
Atlantic Ocean.
Tropical cyclone formation is not expected for the next five days.
&&
Public Advisories on Tropical Depression Eleven are issued under
WMO header WTNT31 KNHC and under AWIPS header MIATCPAT1.
Forecast/Advisories on Tropical Depression Eleven are issued under
WMO header WTNT21 KNHC and under AWIPS header MIATCMAT1.
$$
Forecaster Blake
Posted on 11 August 2020 | 6:28 pm
5-Day Uncertainty Track last updated Tue, 11 Aug 2020 20:33:48 GMT
Wind Speed Probabilities last updated Tue, 11 Aug 2020 21:24:57 GMT
Posted on 11 August 2020 | 3:33 pm
Issued at 500 PM AST Tue Aug 11 2020
000
WTNT41 KNHC 112032
TCDAT1
Tropical Depression Eleven Discussion Number 1
NWS National Hurricane Center Miami FL AL112020
500 PM AST Tue Aug 11 2020
Visible satellite imagery and ASCAT-C data from earlier in the day
have shown that the area of low pressure NHC has been monitoring
over the tropical Atlantic has developed a less-elongated
circulation with a well-defined center. For the most part, deep
convection has persisted with the system since about this time
yesterday, save a brief period of warming cloud tops this morning.
The low now meets the criteria of a tropical cyclone, and
advisories have been initiated on Tropical Depression Eleven with
30-kt winds, in line with the latest Dvorak Current Intensity
numbers from TAFB and SAB.
The depression is moving westward, or 280/14 kt, to the south of a
large mid-tropospheric high centered over the central Atlantic.
This pattern is expected to evolve rather quickly, with a break
developing in the ridge over the central Atlantic by 48 hours.
This change should allow the depression to begin making more
poleward progress, moving west-northwestward from 36 hours until
the end of the forecast period. The track models are in good
agreement on this scenario, as well as the system's forward speed,
and bring the center of the cyclone near or just to the north of
the northern Leeward Islands in 4-5 days. This first NHC forecast
lies just to the north of the multi-model consensus cluster
through day 3, out of respect for the northern-lying ECMWF model,
and then is close to HCCA on days 4 and 5.
Conventional satellite imagery and Saharan Air Layer analyses
suggest that the center of the depression is being shielded from
much drier air to its north and west. However, as has been the
case for a few days, at least 15 kt of easterly shear has been
pushing deep convection to the western side of the circulation.
This shear is expected to decrease over the next day or two, which
should allow for gradual strengthening to begin by 36 hours, and a
peak in the cyclone's intensity should occur in about 3 days. For
this period, the NHC intensity forecast is a little above HCCA and
the IVCN intensity consensus. After that time, westerly or
southwesterly shear is forecast to develop and increase to 20-30 kt
by days 4 and 5, which is likely to induce significant weakening.
In fact, it's notable that the conditions become hostile enough that
the global models are showing the system opening up into a trough
near the northern Leeward Islands by day 5, which is a plausible
alternate scenario.
FORECAST POSITIONS AND MAX WINDS
INIT 11/2100Z 11.7N 40.0W 30 KT 35 MPH
12H 12/0600Z 12.0N 42.1W 30 KT 35 MPH
24H 12/1800Z 12.4N 44.5W 30 KT 35 MPH
36H 13/0600Z 13.0N 46.9W 35 KT 40 MPH
48H 13/1800Z 13.9N 49.4W 40 KT 45 MPH
60H 14/0600Z 15.1N 51.8W 45 KT 50 MPH
72H 14/1800Z 16.4N 54.3W 45 KT 50 MPH
96H 15/1800Z 18.5N 59.5W 40 KT 45 MPH
120H 16/1800Z 21.0N 64.0W 35 KT 40 MPH
$$
Forecaster Berg
Posted on 11 August 2020 | 3:32 pm
...NEW TROPICAL DEPRESSION FORMS OVER THE TROPICAL ATLANTIC OCEAN...
As of 5:00 PM AST Tue Aug 11
the center of Eleven was located near 11.7, -40.0
with movement W at 16 mph.
The minimum central pressure was 1007 mb
with maximum sustained winds of about 35 mph.
Posted on 11 August 2020 | 3:32 pm
Issued at 500 PM AST Tue Aug 11 2020
000
WTNT31 KNHC 112032
TCPAT1
BULLETIN
Tropical Depression Eleven Advisory Number 1
NWS National Hurricane Center Miami FL AL112020
500 PM AST Tue Aug 11 2020
...NEW TROPICAL DEPRESSION FORMS OVER THE TROPICAL ATLANTIC OCEAN...
SUMMARY OF 500 PM AST...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...11.7N 40.0W
ABOUT 1110 MI...1790 KM WSW OF THE CABO VERDE ISLANDS
ABOUT 1450 MI...2335 KM E OF THE LESSER ANTILLES
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
DISCUSSION AND OUTLOOK
----------------------
At 500 PM AST (2100 UTC), the center of Tropical Depression Eleven
was located near latitude 11.7 North, longitude 40.0 West. The
depression is moving toward the west near 16 mph (26 km/h), and this
general motion is expected to continue through Wednesday. A
west-northwestward motion at a similar forward speed is forecast to
begin Wednesday night and continue through the rest of the week.
Maximum sustained winds are near 35 mph (55 km/h) with higher gusts.
Some strengthening is forecast during the next 48 hours, and the
depression is expected to become a tropical storm by Wednesday
night.
The estimated minimum central pressure is 1007 mb (29.74 inches).
HAZARDS AFFECTING LAND
----------------------
None
NEXT ADVISORY
-------------
Next complete advisory at 1100 PM AST.
$$
Forecaster Berg
Posted on 11 August 2020 | 3:32 pm
Issued at 2100 UTC TUE AUG 11 2020
000
FONT11 KNHC 112032
PWSAT1
TROPICAL DEPRESSION ELEVEN WIND SPEED PROBABILITIES NUMBER 1
NWS NATIONAL HURRICANE CENTER MIAMI FL AL112020
2100 UTC TUE AUG 11 2020
AT 2100Z THE CENTER OF TROPICAL DEPRESSION ELEVEN WAS LOCATED NEAR
LATITUDE 11.7 NORTH...LONGITUDE 40.0 WEST WITH MAXIMUM SUSTAINED
WINDS NEAR 30 KTS...35 MPH...55 KM/H.
Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH)
ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME
EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME
CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME
WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS
CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST
...34 KT (39 MPH... 63 KM/H)...
...50 KT (58 MPH... 93 KM/H)...
...64 KT (74 MPH...119 KM/H)...
FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS
PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE
OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING
AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY)
(CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN
18Z TUE AND THE FORECAST HOUR (CUMULATIVE PROBABILITY)
PROBABILITIES ARE GIVEN IN PERCENT
X INDICATES PROBABILITIES LESS THAN 1 PERCENT
PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN
THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT.
PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY
64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT.
- - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - -
FROM FROM FROM FROM FROM FROM FROM
TIME 18Z TUE 06Z WED 18Z WED 06Z THU 18Z THU 18Z FRI 18Z SAT
PERIODS TO TO TO TO TO TO TO
06Z WED 18Z WED 06Z THU 18Z THU 18Z FRI 18Z SAT 18Z SUN
FORECAST HOUR (12) (24) (36) (48) (72) (96) (120)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
LOCATION KT
VIEQUES PR 34 X X( X) X( X) X( X) X( X) X( X) 3( 3)
SAINT THOMAS 34 X X( X) X( X) X( X) X( X) 1( 1) 2( 3)
SAINT CROIX 34 X X( X) X( X) X( X) X( X) 1( 1) 2( 3)
SAINT MAARTEN 34 X X( X) X( X) X( X) X( X) 1( 1) 5( 6)
SABA 34 X X( X) X( X) X( X) X( X) 1( 1) 4( 5)
ST EUSTATIUS 34 X X( X) X( X) X( X) X( X) 1( 1) 4( 5)
ST KITTS-NEVIS 34 X X( X) X( X) X( X) X( X) 2( 2) 3( 5)
BARBUDA 34 X X( X) X( X) X( X) X( X) 3( 3) 4( 7)
ANTIGUA 34 X X( X) X( X) X( X) X( X) 2( 2) 4( 6)
GUADELOUPE 34 X X( X) X( X) X( X) X( X) 2( 2) 2( 4)
$$
FORECASTER BERG
Posted on 11 August 2020 | 3:32 pm
Issued at 2100 UTC TUE AUG 11 2020
000
WTNT21 KNHC 112032
TCMAT1
TROPICAL DEPRESSION ELEVEN FORECAST/ADVISORY NUMBER 1
NWS NATIONAL HURRICANE CENTER MIAMI FL AL112020
2100 UTC TUE AUG 11 2020
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.
TROPICAL DEPRESSION CENTER LOCATED NEAR 11.7N 40.0W AT 11/2100Z
POSITION ACCURATE WITHIN 30 NM
PRESENT MOVEMENT TOWARD THE WEST OR 280 DEGREES AT 14 KT
ESTIMATED MINIMUM CENTRAL PRESSURE 1007 MB
MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.
REPEAT...CENTER LOCATED NEAR 11.7N 40.0W AT 11/2100Z
AT 11/1800Z CENTER WAS LOCATED NEAR 11.6N 39.6W
FORECAST VALID 12/0600Z 12.0N 42.1W
MAX WIND 30 KT...GUSTS 40 KT.
FORECAST VALID 12/1800Z 12.4N 44.5W
MAX WIND 30 KT...GUSTS 40 KT.
FORECAST VALID 13/0600Z 13.0N 46.9W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 30NE 0SE 0SW 30NW.
FORECAST VALID 13/1800Z 13.9N 49.4W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 30NE 0SE 0SW 30NW.
FORECAST VALID 14/0600Z 15.1N 51.8W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 40NE 0SE 0SW 30NW.
FORECAST VALID 14/1800Z 16.4N 54.3W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 40NE 20SE 0SW 30NW.
EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM
ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY
OUTLOOK VALID 15/1800Z 18.5N 59.5W
MAX WIND 40 KT...GUSTS 50 KT.
OUTLOOK VALID 16/1800Z 21.0N 64.0W
MAX WIND 35 KT...GUSTS 45 KT.
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 11.7N 40.0W
NEXT ADVISORY AT 12/0300Z
$$
FORECASTER BERG
Posted on 11 August 2020 | 3:32 pm
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