Marine Forecasts

    EDIT      (on/off)   Help

---

7 Day Forecast for Marine Location Near Cudjoe Key, FL

   Hourly   EDIT   Help

---

Area Discussion for - Key West, FL

      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS62 KKEY 111617 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 1117 AM EST Wed Dec 11 2019

DISCUSSION. Currently - Water vapor imagery along with analysis shows a broad upper level trough extending from the Gulf of Mexico poleward to the the Hudson Bay. Upstream a shortwave ridge is moving eastward across the spine of the Rocky Mountains. Behind this ridge is the next shortwave trough which moved inland from California and now resides in the Intermountain West. At the surface, a cold front has descended down upon the north Gulf coast and is stalling. High pressure over the Ozarks is helping to drive this front and effectively stalling it along the coast as it moves east. Another high pressure cell over the upper Missouri River Valley is quickly moving southeast and will reinforce the aforementioned high pressure. Further upstream, an elongated surface trough is in its infancy stage along the lee of the Rocky Mountains in response to the weak upper level shortwave in the Intermountain West.

Taking a look closer at home, Key West radar shows a diminishing trend on the shower activity. For a while a narrow band of moderate to heavy showers sat between the eastern end of Key West and Big Coppitt Key. Some locations received around or just over 1 inch, especially over Stock Island and Boca Chica. This activity for the most part has tapered back somewhat to the south and southwest of the Lower Keys. Another narrow band of isolated showers extends from the Bayside waters, across the Middle Keys, and nearshore waters south of the Middle Keys. This activity is moving northwest. As for temperatures, they are in the lower to mid 80s with the exception of Key West and vicinity where the rain has kept temperatures in the upper 70s. Winds are light around 10 mph from the east and southeast across the entire island chain.

Short Term Update - Additional showers remain possible through the remainder of the day as weak speed convergence will persist along with increasing moisture flux. The 12Z RAOB sounding this morning showed a PW value of 1.73 inches which sits above the 90 percentile for this time of year. With that being said, a subsidence layer with drier air was centered around 700 mb and will limit growth. Some of the stronger activity may be able to break through this layer given the decent instability, as there was an isolated lightning strike south of Sand Key as of the writing of this discussion. Even with the decent instability in place, the lack of any large scale ascent and the presence of the dry layer in the mid levels will limit the areal coverage of any additional would-be thunderstorms. As such PoPs will be kept at 20 percent. Temperatures are on par to reach to near record levels again. Today's record for the high temperature at Key West is 85 degrees while Marathon's is 86 degrees. Otherwise, no changes planned or needed.

MARINE. Winds have slacken this morning to light to gentle breezes across the waters north of the island chain with gentle to occasional moderate breezes across Hawk Channel and the Florida Straits. This slackening will be brief as the pressure gradient will be increasing tonight in advance of the cold front that will stall along the Gulf coast. Model guidance is indicating a significant pressure difference of around 8 mb between Jacksonville and Key West which coincides with a Small Craft Advisory for our entire marine district. For now, will headline a Small Craft Advisory may be needed for Gulf waters, Hawk Channel and the Straits of Florida but retain 15 to 20 knots. Stay tuned to later marine forecasts. Thereafter, moderate east winds on Thursday afternoon and night will abate appreciably from Friday through most of this weekend.

AVIATION. VFR conditions to prevail at the Key West and Marathon terminals. Vicinity showers are expected throughout the day for Key West due to a convergence zone near the Lower Keys. These showers may produce brief periods of sub VFR conditions. East to southeast winds are expected through this afternoon, becoming northeasterly tonight as a cold front approaches the island chain.

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

Public/Marine/Fire . LIW Aviation/Nowcasts . SDR Data Collection . NB

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

   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
KYWF1 - 8724580 - Key West, FL	18 mi	56 min	S 6 G 8.9	77°F	81°F		1021.9 hPa
SMKF1 - Sombrero Key, FL	20 mi	36 min	SE 7 G 8.9	80°F				75°F
VCAF1 - 8723970 - Vaca Key, FL	20 mi	56 min	SE 7 G 11	82°F	77°F		1021.7 hPa
SANF1 - Sand Key, FL	25 mi	36 min	S 9.9 G 11	76°F			1019.9 hPa	72°F
42095	30 mi	26 min			79°F	2 ft
LONF1 - Long Key, FL	36 mi	36 min		81°F			1020.6 hPa	75°F
JKYF1 - Johnson Key, FL	42 mi	86 min			79°F
LRKF1 - Little Rabbit Key, FL	42 mi	146 min			76°F
MUKF1 - Murray Key, FL	43 mi	86 min			78°F
PKYF1 - Peterson Key, FL	43 mi	86 min			76°F
BKYF1	48 mi	86 min			80°F
WRBF1 - Whipray Basin, FL	49 mi	86 min	E 4.1		78°F

Wind History for Key West, FL

(wind in knots)    EDIT      (on/off)   Help

1 PM

2 PM

3 PM

4 PM

5 PM

6 PM

7 PM

8 PM

9 PM

10 PM

11 PM

12 AM

1 AM

2 AM

3 AM

4 AM

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

Last 24hr

SE10 G14

SE8 G11

SE6 G11

SE8 G12

SE7 G10

E5 G9

E6 G9

E4 G8

SE6 G10

SE7 G11

E5 G10

SE5 G8

SE6 G10

SE5 G8

SE5

SE4

SE3

S1 G4

S5 G8

SE3

E3 G6

SE4 G7

SE3

S4

1 day ago

SE9 G13

E9 G12

SE7 G14

SE7

SE7

SE8 G11

SE8

SE7 G11

SE6 G10

SE5 G9

SE8 G11

E6 G12

SE8 G13

SE9 G12

SE8 G11

SE8 G11

SE8 G13

SE9 G13

SE9 G15

SE8 G12

SE11 G14

SE8 G13

SE12 G16

SE11 G14

2 days ago

E7 G14

NE6 G12

E7 G10

E8 G14

E7 G11

E8

E5 G11

E7 G11

SE8 G12

E4 G7

E6

E3

NE2

E3 G6

NE4 G7

E3

E4

E4

E3

E4 G8

E3 G7

E8 G12

E7 G12

SE11 G17

---

Airport Reports

    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.

Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Key West Naval Air Station, FL	12 mi	2.5 hrs	WNW 5	5.00 mi	Light Rain	79°F	71°F	77%	1021.7 hPa
Key West International Airport, FL	16 mi	33 min	SSW 7	10.00 mi	Fair	77°F	72°F	85%	1021.5 hPa
The Florida Keys - Marathon International Airport, FL	24 mi	33 min	E 5	9.00 mi	Light Rain	81°F	75°F	82%	1021.2 hPa

Link to 5 minute data for KNQX

Wind History from NQX (wind in knots)

1 PM

2 PM

3 PM

4 PM

5 PM

6 PM

7 PM

8 PM

9 PM

10 PM

11 PM

12 AM

1 AM

2 AM

3 AM

4 AM

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

Last 24hr

SE13

SE12

SE11

E10

E9

E9

E8

E9

SE8

SE9

SE8

SE8

SE8

SE7

SE7

E6

SE5

E5

E6

S4

SW9

W5

--

SW6

1 day ago

E13

E10

E11

SE8

E12

E8

SE9

E9

E9

E10

E9

E11

SE10

SE11

SE10

SE11

SE10

SE10

SE12

SE11

SE12

SE12

SE12

SE13

2 days ago

E10

E11

E12

E10

E9

E11

E10

E11

E11

E6

NE5

NE5

NE6

NE6

E6

NE5

NE5

NE5

E5

NE5

E6

E9

E12

E13

---

Tide / Current Tables for Gopher Key, Cudjoe Bay, Florida

   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data

---

Tide / Current Tables for No Name Key (northeast of), Florida Current

   EDIT      (on/off)   Help   One Week of Data

---

Weather Map

       (on/off)   Help Weather Map

---

GEOS Local Image of Southeast    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

---

Wind Forecast for Key West, FL (12,3,4,5)

      (on/off)   Help

---

Ground Weather Radar Station Key West, FL

   (on/off)   Help

---

Gulf Stream Current

---

Cookie Policy: This webiste uses cookies to save your settings. No personal information is saved. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser. Privacy Policy: I do not sell or share any user data or anything else for that matter. I do not keep site logs longer than I need to to keep bad actors off the site. Basically, I delete them after looking at them. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway. Disclaimer: The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.