Thursday, October1, 2020
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Marine Weather and Tides
Key West, FL

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:18AMSunset 7:14PM Thursday October 1, 2020 3:34 PM EDT (19:34 UTC) Moonrise 6:30PMMoonset 6:03AM Illumination 100% Phase: Full Moon; Moon at 14 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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GMZ044 Expires:202010012030;;646631 Fzus52 Kkey 011428 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 1028 Am Edt Thu Oct 1 2020 Florida Bay, Hawk Channel And Straits Of Florida From Ocean Reef To South Of Dry Tortugas, And The Extreme Southeastern Gulf Of Mexico, Including The Florida Keys National Marine Sanctuary Seas Are Given As Significant Wave Height, Which Is The Average Height Of The Highest 1/3 Of The Waves. Individual Waves May Be More Than Twice The Significant Wave Height. Gmz042>044-012030- Hawk Channel From Ocean Reef To Craig Key Out To The Reef- Hawk Channel From Craig Key To West End Of Seven Mile Bridge Out To The Reef- Hawk Channel From West End Of Seven Mile Bridge To Halfmoon Shoal Out To The Reef- 1028 Am Edt Thu Oct 1 2020
This afternoon..Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet. NEarshore waters smooth to a light chop. Scattered showers and isolated Thunderstorms.
Tonight..Northeast to east winds 5 to 10 knots. Seas 1 to 2 feet. NEarshore waters smooth to a light chop. Numerous showers and scattered Thunderstorms.
Friday..Northeast winds 10 to 15 knots, increasing to near 15 knots late in the afternoon. Seas 1 to 2 feet, building to 2 to 4 feet. NEarshore waters a light to moderate chop, becoming a moderate chop. Numerous showers and scattered Thunderstorms.
Friday night and Saturday..Northeast winds 15 to 20 knots. Seas 2 to 4 feet. NEarshore waters choppy. Numerous showers and scattered Thunderstorms.
Saturday night..East winds 15 to 20 knots. Seas 2 to 4 feet. NEarshore waters choppy. Numerous showers and scattered Thunderstorms.
Sunday..East to southeast winds near 15 knots. Seas 2 to 4 feet. NEarshore waters choppy. Numerous showers and isolated Thunderstorms.
Sunday night..East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. Scattered showers and isolated Thunderstorms.
Monday..East to southeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Scattered showers and isolated Thunderstorms.
Monday night..East winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop. Scattered showers and isolated Thunderstorms.


7 Day Forecast for Marine Location Near Key West, FL
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location: 24.55, -82.13     debug


Area Discussion for - Key West, FL
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FXUS62 KKEY 011857 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 257 PM EDT Thu Oct 1 2020

DISCUSSION. Scattered showers and isolated thunderstorms developed just north of the Lower Keys and north of the reef out through Dry Tortugas, notably a bit north than CAMs guidance had suggested. Thus sufficient moisture and instability was present for mesoscale, northward-directed cloud line genesis along with a brief waterspout. Light southeast winds have spread throughout the Keys with a stationary front to the northwest. Temperatures have reached the upper 80s to near 90 with dewpoints a not-so-pleasant upper 70s pushing heat indices in the 100-105 range.

The overall synoptic situation remains complex into the weekend with high pressure retreating over the western Atlantic, a meandering frontal zone near and northwest of the Keys with continental high pressure building into the southeast, and falling pressures to our southwest as a tropical wave slowly moves west- northwest toward the Yucatan Peninsula. Regardless of any tropical cyclone development well to our southwest, general southeast flow, whether reaching the surface or running over periodic theta-e minimums produced by occasional clusters and large bands of showers and thunderstorms, will promote likely to perhaps categorical rain chances late tonight through at least Saturday night. While some episodes of street and poor drainage flooding, compounded by the higher-than-normal tides, most overall rainfall totals forecast through the weekend will be the sum of these periodic events. Some of the notible rain episodes may be produced by confluent east- southeast flow as the Atlantic ridge shifts north and east Friday, then a lower tropospheric undulation passing through Saturday.

An interesting complication is guidance indicating the possibility of dry air working in from the east later Sunday, which could decrease rain chances down into lower chance over portions of the upper and maybe the the middle Keys.

Monday onward, as lower pressure shifts further west of the Yucatan Peninsula, ridging to our north should dominate the lower tropospheric flow with a tropical wave passing near or to the south the middle of next week. Due to some trending further south with the next wave feature, rain chances were kept in the chance category with east to southeast winds continuing.

MARINE. After a period of light southeast winds late this afternoon, light to gentle northeast to east breezes are expected to set in this evening. High pressure building into the southeast states early this weekend in combination with a stationary front just to the north, and lowering pressures near the Yucatan will freshen breezes Friday night and Saturday. Small Crat Advisories may be required for portions of the Florida Keys coastal waters at least early in the weekend, with the potential for the strongest winds and higher seas toward the westernmost portions of the Straits and southeast open Gulf waters.

AVIATION. VFR conditions will prevail at the terminals through 03z. A ragged cloud line has formed near the Lower Keys. Although light low-level southerly flow has tended to push the activity north of the terminals, some southward redevelopment may occur. Have retained mention of VCSH/VCTS in the TAFs through this evening. Overnight, more widespread showers and t'storms are expected over the island chain. Have included SHRA for now after 03z and future amendments/TEMPOs will need to be inserted for more specific details.

CLIMATE. In 1920, the daily record cold high temperature of 77F was recorded in Key West. Temperature records date back to 1872.

Of note, in 1890, congress and President Benjamin Harrison passed an act creating the Weather Bureau, the predecessor of the National Weather Service.

PRELIMINARY POINT TEMPS/POPS. Key West 77 86 77 86 / 70 80 70 70 Marathon 77 87 78 87 / 70 70 70 70

KEY WATCHES/WARNINGS/ADVISORIES. FL . None. GM . None.

Public/Marine/Fire . JR Aviation/Nowcasts . BT Data Acquisition . SDR

Visit us on the web at weather.gov/key

Follow us on Facebook and Twitter at: www.facebook.com/nwskeywest www.twitter.com/nwskeywest


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
42095 13 mi64 min 85°F 87°F2 ft
SANF1 - Sand Key, FL 15 mi34 min ESE 7 G 8.9 84°F 1012.6 hPa (-1.8)74°F
KYWF1 - 8724580 - Key West, FL 17 mi46 min 91°F 87°F1012.5 hPa
GKYF1 40 mi94 min 85°F

Wind History for Key West, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Key West International Airport, FL20 mi41 minSE 710.00 miA Few Clouds88°F75°F68%1012.3 hPa
Key West Naval Air Station, FL23 mi41 minESE 710.00 miPartly Cloudy91°F77°F64%1012.1 hPa

Link to 5 minute data for KEYW

Wind History from EYW (wind in knots)
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1 day agoS9S8S8SW7SW4SW4SW3CalmS3NW9E3E3CalmCalmCalmCalmCalmSE3SE4S6S7SW4SW65
2 days ago--W5W3N4Calm6NE6E3NE4CalmSE8SE6E3SE11SE11SE8SE8SE10SE10S10S12S12S12S11

Tide / Current Tables for Sand Key Lighthouse, Sand Key Channel, Florida (2)
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Sand Key Lighthouse
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Thu -- 03:13 AM EDT     0.40 feet Low Tide
Thu -- 07:02 AM EDT     Moonset
Thu -- 07:19 AM EDT     Sunrise
Thu -- 09:27 AM EDT     1.97 feet High Tide
Thu -- 03:42 PM EDT     0.45 feet Low Tide
Thu -- 05:06 PM EDT     Full Moon
Thu -- 07:13 PM EDT     Sunset
Thu -- 07:29 PM EDT     Moonrise
Thu -- 09:35 PM EDT     1.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.20.80.50.40.50.71.11.51.81.91.91.81.41.10.70.50.50.60.91.31.61.81.81.7

Tide / Current Tables for Boca Grande Channel, Florida Current
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Boca Grande Channel
Click for Map
Thu -- 01:27 AM EDT     -1.36 knots Max Ebb
Thu -- 04:18 AM EDT     0.00 knots Slack
Thu -- 07:03 AM EDT     Moonset
Thu -- 07:11 AM EDT     1.24 knots Max Flood
Thu -- 07:20 AM EDT     Sunrise
Thu -- 10:32 AM EDT     -0.00 knots Slack
Thu -- 01:45 PM EDT     -1.46 knots Max Ebb
Thu -- 04:44 PM EDT     0.00 knots Slack
Thu -- 05:06 PM EDT     Full Moon
Thu -- 07:14 PM EDT     Sunset
Thu -- 07:26 PM EDT     1.15 knots Max Flood
Thu -- 07:30 PM EDT     Moonrise
Thu -- 10:44 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1-1.3-1.3-0.9-0.20.511.21.20.90.4-0.3-1-1.4-1.5-1.2-0.60.20.81.11.10.90.5-0.2

Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Key West, FL
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Gulf Stream Current



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