Sunrise 6:33 AM   Sunset 8:03 PM Moonrise 3:48 PM   Moonset 3:06 AM

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GMZ657 Expires:202405191700;;468701 Fzus52 Kmfl 190802 Cwfmfl
coastal waters forecast for florida national weather service miami fl 401 am edt Sun may 19 2024
atlantic coastal waters from jupiter inlet to ocean reef out to 60 nm and gulf coastal waters from east cape sable to chokoloskee out 20 nm and chokoloskee to bonita beach out 60 nm - .including the waters of biscayne bay and lake okeechobee.
seas are provided as a range of the average height of the highest 1/3 of the waves - .along with the occasional height of the average highest 10 percent of the waves.
gmz656-657-676-191700- coastal waters from chokoloskee to bonita beach fl out 20 nm- coastal waters from east cape sable to chokoloskee fl out 20 nm- waters from chokoloskee to bonita beach fl from 20 to 60 nm- 401 am edt Sun may 19 2024
Today - SW winds around 5 kt becoming W nw in the afternoon. Seas 0 to 1 foot near shore and around 2 ft well offshore. Wave detail: sw 2 ft at 6 seconds. Bay and inland waters a light chop. A chance of showers with a slight chance of tstms. Tonight - W winds 5 kt. Seas 0 to 1 foot near shore and around 2 ft well offshore. Wave detail: W sw 2 ft at 5 seconds. Bay and inland waters smooth. A chance of showers in the evening. A chance of tstms through the night. Showers likely after midnight.Mon - W winds 5 to 10 kt. Seas 0 to 1 foot near shore and 1 to 2 ft well offshore. Wave detail: W 2 ft at 5 seconds. Bay and inland waters a light chop. Showers likely in the morning. A chance of tstms. A chance of showers in the afternoon. Mon night - N nw winds 5 to 10 kt. Seas less than 2 ft. Wave detail: nw 1 foot at 4 seconds. Bay and inland waters a light chop. A chance of tstms in the evening. A chance of showers through the night. A slight chance of tstms after midnight. Tue - N ne winds around 5 kt becoming W nw in the afternoon. Seas less than 2 ft. Wave detail: nw 1 foot at 4 seconds. Bay and inland waters a light chop. A slight chance of tstms in the morning. A chance of showers. A chance of tstms in the afternoon. Tue night - NEarshore, N nw winds 5 to 10 kt becoming ne after midnight. Offshore, ne winds 5 to 10 kt. Seas less than 2 ft. Wave detail: N nw 1 foot at 4 seconds. Bay and inland waters a light chop. A chance of showers in the evening. A slight chance of tstms through the night. A slight chance of showers after midnight. Wed - NEarshore, E ne winds 5 kt becoming se around 5 kt in the morning, then becoming sw in the afternoon. Offshore, E winds 5 to 10 kt becoming E se in the morning, then becoming sw in the afternoon becoming W nw in the evening. Seas 0 to 1 foot. Bay and inland waters smooth. A slight chance of showers and tstms in the morning. A chance of showers and tstms in the afternoon. Wed night - N ne winds around 5 kt becoming E late in the evening. Seas 0 to 1 foot. Bay and inland waters a light chop. A chance of showers and tstms, mainly in the evening. Thu - E se winds around 5 kt becoming W sw in the evening. Seas 0 to 1 foot. Bay and inland waters smooth. A slight chance of showers in the morning. A slight chance of tstms. A chance of showers in the afternoon.

GMZ600 307 Am Cdt Sun May 19 2024
Synopsis - Light and variable winds through Monday night will be followed by a light southeasterly to southerly flow Tuesday through Thursday.

FXUS62 KMFL 190627 AFDMFL

Area Forecast Discussion National Weather Service Miami FL 227 AM EDT Sun May 19 2024

New SHORT TERM, LONG TERM, MARINE

SHORT TERM
(Today through Monday)
Issued at 225 AM EDT Sun May 19 2024

The mid-lvl ridge which has been positioned over SFL the last couple days will be displaced southeast of the area today as a pronounced shortwave trough shifts southeastward toward the area (along with some lower-amplitude convectively-enhanced perturbations). At the surface, low pressure will develop off the FL/GA coast with a warm but relatively weak southwesterly flow prevailing over SFL, which should help pin the east coast sea breeze near the immediate coast (and perhaps not even progressing inland at all). The encroaching shortwave will result in both cooling mid-lvl temperatures and also increasing mid-lvl W-SWrly flow, which will support an increasingly favorable convective parameter space over portions of SFL this afternoon. Surface temperatures should once again increase well into the 90s which along with seasonably cool 500mb temps (-9/-10C) will result in steep lapse rates through the lower troposphere with SBCAPE values in excess of 3000-3500 J/kg along with DCAPE > 1200 J/kg progged. As mid-lvl flow increases, 0-6km bulk shear will likely increase to over 40 kts over northern portions of the area this afternoon which would favor organized multi-cell clusters with isolated supercells possible, particularly along any east coast sea breeze where shear will locally be enhanced.

The main questions regarding convective evolution and the overall severe threat will be the presence of increasing synoptic cloud cover ahead of the approaching wave along with the potential evolution/inland progression of the east coast sea breeze. Even with those question marks, given the aforementioned environment, there exists a (greater than climo) risk of large hail, damaging winds, and potentially even an isolated tornado (mostly dependent upon the sea breeze) with afternoon thunderstorms. The best chances of severe storms look to be over Palm Beach and Broward counties where the most favorable intersection between the increasing forcing, the sea breeze progression, and diurnal timing appears to exist.
This coincides with the latest day 1 outlook from SPC which places a slight risk over northern portions of the east coast, largely driven by the wind and hail risk.

The other concern of the day will be excessive heat as the hot air mass remains in place. It won't quite be as oppressive as yesterday (which basically featured record high heat indices for May) but peak apparent temperatures of 106-110 degrees look probable for at least Miami-Dade and Broward counties, so another heat advisory has been issued for those locations. Given that cloud cover and rain chances will increase by early afternoon over northern portions of the area, suspect that these areas should largely remain below advisory criteria. That being said, would not be surprised to see localized readings near advisory levels in portions of Collier and PB counties particularly if convection/cloud cover is slower to move in than currently forecast.

The weak low will remain over the Atlantic on Monday and a weak frontal boundary will shift southward towards the area. This, along with the once again pinned east coast sea breeze will support scattered to numerous showers and thunderstorms once again, although reduced instability and gradually decreasing large-scale ascent (as the trough shifts east)
should support a lower risk of severe storms than Sunday. Although temperatures and heat indices will remain above normal, they should be a few degrees lower than Sunday so heat headlines are not expected.

LONG TERM
(Monday night through Saturday)
Issued at 225 AM EDT Sun May 19 2024

The weak cold front should finally make it through the area on Tuesday although a trailing shortwave will likely support at least scattered showers and storms particularly over southern portions of the area closer to the boundary. Mid-lvl ridging should then build into the area for the mid-late week period, with generally light easterly surface flow prevailing as weak high pressure builds into the Atlantic. Drier air and the presence of the ridge will keep PoPs lower than the early week period (largely in the isolated-scattered category), with the synoptic easterly flow favoring the highest PoPs over the Interior and SW Florida. The easterly flow will result in cooler (but still above average) high temperatures over SEFL (mostly upper 80s) while low to mid 90s can be expected over SWFL and the Interior.

AVIATION
(06Z TAFS)
Issued at 120 AM EDT Sun May 19 2024

L/V winds overnight before sea-breeze circulations pick up after sunrise. SHRA/TSRA will develop along boundaries and could impact terminals bringing sub-MVFR cigs/vis as well as erratic wind shifts, especially during the afternoon hours.

MARINE
Issued at 225 AM EDT Sun May 19 2024

Mainly benign marine conditions are expected over the period with light to moderate southwesterly to westerly flow expected today which will generally shift to the northwest on Monday as a cold front approaches. Scattered to Numerous showers and thunderstorms can be expected today, with locally enhanced winds and seas possible in storms particularly over the Atlantic waters.

PRELIMINARY POINT TEMPS/POPS
Miami 93 77 91 75 / 50 70 80 50 West Kendall 95 75 92 72 / 40 70 80 40 Opa-Locka 94 77 92 75 / 50 70 80 50 Homestead 94 77 92 74 / 40 70 80 50 Fort Lauderdale 91 77 89 75 / 60 70 80 50 N Ft Lauderdale 92 77 90 75 / 70 60 80 50 Pembroke Pines 95 77 93 75 / 60 70 80 50 West Palm Beach 92 74 89 72 / 70 60 80 50 Boca Raton 93 75 91 74 / 70 60 80 50 Naples 91 77 89 74 / 50 50 50 30

MFL WATCHES/WARNINGS/ADVISORIES
FL...Heat Advisory from 10 AM this morning to 6 PM EDT this evening for FLZ071>074-172>174.

AM...None.
GM...None.

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Shark River entrance
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Sun -- 04:06 AM EDT     Moonset
Sun -- 06:03 AM EDT     1.03 feet Low Tide
Sun -- 06:37 AM EDT     Sunrise
Sun -- 11:12 AM EDT     4.10 feet High Tide
Sun -- 04:48 PM EDT     Moonrise
Sun -- 07:00 PM EDT     0.28 feet Low Tide
Sun -- 08:04 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Shark River entrance, Florida, Tide feet

Cape Sable
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Sun -- 04:06 AM EDT     Moonset
Sun -- 06:08 AM EDT     0.90 feet Low Tide
Sun -- 06:37 AM EDT     Sunrise
Sun -- 11:48 AM EDT     3.42 feet High Tide
Sun -- 04:48 PM EDT     Moonrise
Sun -- 07:05 PM EDT     0.25 feet Low Tide
Sun -- 08:04 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Cape Sable, East Cape, Florida, Tide feet

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