Thursday, April22, 2021
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Marine Weather and Tides
Crescent City, FL

Version 3.4
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1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:49AMSunset 7:57PM Thursday April 22, 2021 10:03 AM EDT (14:03 UTC) Moonrise 2:17PMMoonset 3:08AM Illumination 81% Phase: Waxing Gibbous; Moon at 10 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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AMZ454 Expires:202104222130;;931654 Fzus52 Kjax 220712 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 312 Am Edt Thu Apr 22 2021 Atlantic Coastal Waters From Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm. 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 1/10 Of The Waves. Amz450-452-454-222130- Coastal Waters From Altamaha Sound To Fernandina Beach Fl Out 20 Nm- Coastal Waters From Fernandina Beach To St. Augustine Fl Out 20 Nm- Coastal Waters From St. Augustine To Flagler Beach Fl Out 20 Nm- 312 Am Edt Thu Apr 22 2021
.small craft advisory in effect until 10 am edt this morning...
Today..Northeast winds 15 to 20 knots diminishing to 5 to 10 knots. Seas 3 to 5 feet with a dominant period 5 seconds. Choppy on the intracoastal waters.
Tonight..East winds 5 to 10 knots. Seas 3 to 4 feet with a dominant period 6 seconds. Mostly smooth on the intracoastal waters.
Friday..East winds 10 knots. Seas 3 to 4 feet with a dominant period 7 seconds. A light chop on the intracoastal waters.
Friday night..Southeast winds 10 to 15 knots. Seas 3 to 5 feet. A light chop on the intracoastal waters.
Saturday..South winds 15 to 20 knots. Seas 3 to 5 feet. Choppy on the intracoastal waters. Slight chance of showers in the morning. Slight chance of Thunderstorms. Chance of showers in the afternoon.
Saturday night..Southwest winds 15 to 20 knots becoming west 10 to 15 knots after midnight. Seas 3 to 5 feet. Chance of showers and slight chance of Thunderstorms.
Sunday..West winds 10 to 15 knots becoming northwest 5 to 10 knots in the afternoon. Seas 3 to 4 feet.
Sunday night..North winds 5 to 10 knots. Seas 2 to 3 feet.
Monday..Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 312 Am Edt Thu Apr 22 2021
Synopsis.. High pressure to the northwest will cause strong northeast winds around 20 knots this morning, decreasing in the afternoon as the high pressure center shifts closer and the pressure gradient weakens. Small craft advisories are in effect until 10 am. The high will shift off the carolina coast Friday, and winds will become easterly. Winds will begin to increase again Friday night as the high moves east of the area waters and a warm front approaches from the southeast. Saturday, winds will continue to strengthen as the warm front lifts north and a cold front approaches from the northwest. Small craft advisories may be needed as southerly winds pick up on Saturday, and showers and strong Thunderstorms will be possible in the afternoon and evening. Winds will shift to southwesterly Saturday night as the cold front gets closer, then shift to westerly after the front passes early Sunday morning. Winds will start to decrease Sunday afternoon, and high pressure will build to the north through early next week.
Gulf stream.. The approximate location of the west wall of the gulf stream as of apr 22, 2021 at 1200 utc... 65 nautical miles east of flagler beach. 75 nautical miles east of saint augustine beach. 81 nautical miles east of jacksonville beach. 96 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near Crescent City, FL
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location: 29.39, -81.6     debug


Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 221126 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 726 AM EDT Thu Apr 22 2021

AVIATION. [Through 12Z Friday]

VFR conditions expected through the next 24 hours. Dry, post-frontal airmass has cleared skies with the exception of a batch of cirrus currently drifting overhead. By 14z, skies will be clear as cirrus moves offshore. Expect winds to be strongest through the morning hours as they veer from N to NE, with sustained winds of 10-15 knots and gusts up to 30 knots. Winds will decrease through this afternoon as a progressive Atlantic sea breeze pushes inland, veering winds further to the ENE. Sea breeze expected to reach I-95 corridor by 19z and then the I-75 corridor by 01z/02z. Winds will become light at inland sites overnight tonight but remain breezy at airfields along the immediate coast with persisting onshore winds.

PREV DISCUSSION [352 AM EDT].

NEAR TERM [Through Tonight].

A low level ridge of high pressure will build eastward over the Southeast through the day, then move closer to the mid-Atlantic coastline overnight. This will push in a much colder, drier air mass. We'll have a chilly start this morning with lows in the 40s to low 50s, with strong winds from the north making it feel even colder- like upper 30s to mid 40s across much of the region. Winds will lower quickly in the afternoon as the ridge settles briefly over Nrn GA, but with the cold, dry airmass in place, we'll still struggle to warm into the the upper 60s to mid 70s. Very dry conditions will also mean enhanced fire danger, particularly in inland SE GA where minimum RH values will be around 20-25% and fuels are dry.

SHORT TERM [Friday Through Saturday].

Friday, high pressure to the northeast will keep the area dry through the day as cloud cover increases ahead of the next frontal system. Surface winds will shift to become southeasterly Friday afternoon, which will bring high temperatures up into the lower 80s along the I-75 corridor. Breezy onshore winds will keep highs along the I-95 corridor cooler in the 70s. Friday night, a warm front stretching from a low pressure center in the southern plains, over the eastern Gulf of Mexico, and towards southern Florida will lift northeastward towards the area. A few showers will be possible overnight in SE GA as isentropic lift strengthens. Overnight temperatures will be warmer than the previous two nights with lows in the lower 60s inland and middle 60s at the coast.

Saturday, there will be a risk of severe weather, primarily in SE GA and inland NE FL north of I-10. The low over the central plains will track towards the Mid-Atlantic region, which will bring the approaching warm front north across the area in the morning/early afternoon followed by a trailing cold front from the northwest. The strong low will be accompanied by a 50-70 knot low level jet, which will develop a strongly sheared environment in SE GA and NE FL north of I-10 with moderate shear over the rest of NE FL as well. Temperatures behind the warm front will rise into the 80s and dew points will rise into the 60s. Instability will rapidly increase through the afternoon, and CAPE is expected to be upwards of 1500 J/kg.

This environment will be favorable for severe thunderstorms capable of producing strong winds, hail, and isolated tornadoes. Southwesterly flow behind the warm front will also bring moisture from the Gulf of Mexico over the area, which could contribute to heavy rainfall. Severe potential will be greatest over SE GA and inland NE FL north of I-10 where strong shear and high CAPE values will be co-located with convergence caused by the lifting warm front. Severe potential will be lower over the rest of NE FL, but severe storms will still be possible due to moderate shear and instability in the warm sector between the warm and cold fronts. The cold front will continue to cross the area through early Sunday morning. Overnight lows Saturday night into Sunday morning are expected to be in the 60s.

LONG TERM [Sunday Through Thursday].

The trailing cold front will cross the area early Sunday, which will continue rain and storm chances through the morning hours. High pressure will build in from the north after the cold front passes. High pressure ridging over the eastern United States is expected to continue through the middle of next week, bringing dry weather through Wednesday. Models suggest the next chance for rain will come with an approaching cold front towards the end of the week. High temperatures through this period are expected to be in the 70s and 80s, and low temperatures are expected to be in the 50s and 60s.

MARINE.

High pressure to the northwest will cause strong northeast winds around 20 knots this morning, decreasing in the afternoon as the high pressure center shifts closer and the pressure gradient weakens. Small Craft Advisories are in effect until 10 AM. The high will shift off the Carolina coast Friday, and winds will become easterly. Winds will begin to increase again Friday night as the high moves east of the area waters and a warm front approaches from the southeast. Saturday, winds will continue to strengthen as the warm front lifts north and a cold front approaches from the northwest. Small Craft Advisories may be needed as southerly winds pick up on Saturday, and showers and strong thunderstorms will be possible in the afternoon and evening. Winds will shift to southwesterly Saturday night as the cold front gets closer, then shift to westerly after the front passes early Sunday morning. Winds will start to decrease Sunday afternoon, and high pressure will build to the north through early next week.

Rip Currents: High Risk of rip currents Today at NE FL beaches, decreasing to Moderate Friday. Moderate Risk at SE GA beaches through Friday.

FIRE WEATHER.

Elevated Fire Danger in inland Southeast Georgia Today. Long duration Critically Low Humidity Today across inland Southeast Georgia and the Suwannee Valley.

A ridge of high pressure will approach the region today, bringing in a significantly colder and drier airmass, but also lowering our winds noticeably in the afternoon. VERY dry conditions will be in place this afternoon with minimum RH values in the 20-25% range across inland southeast Georgia and upper Suwannee Valley and 25-30% across the lower Suwannee Valley. In inland southeast Georgia, fuel moistures are also forecast to hover near the 6% threshold, so there is an elevated fire danger there again today. On Friday, onshore flow will begin to gradually return moisture to the region, but RH values will be around 25-30% in inland southeast Georgia again. This weekend, a strong storm system will move through the region, bringing thunderstorms to the area Saturday afternoon and Saturday night, possibly lingering into Sunday morning.

HYDROLOGY.

Runoff from weekend rainfall will result in portions of the lower Santa Fe River reaching or briefly exceeding flood stage on Today and Friday, particularly in the vicinity of O'Leno State Park.

PRELIMINARY POINT TEMPS/POPS.

AMG 68 45 78 58 79 / 0 0 0 20 80 SSI 64 55 72 65 81 / 0 0 0 10 60 JAX 68 51 76 63 85 / 0 0 0 10 50 SGJ 67 57 74 65 83 / 0 0 0 10 40 GNV 75 51 80 61 85 / 0 0 0 0 40 OCF 76 53 82 63 87 / 0 0 0 0 30

JAX WATCHES/WARNINGS/ADVISORIES. FL . High Rip Current Risk through this evening for Coastal Duval- Coastal Flagler-Coastal Nassau-Coastal St. Johns.

GA . None. AM . Small Craft Advisory until 10 AM EDT this morning for Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM-Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM-Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
GTXF1 - Guana Tolomato Matanzas Reserve, FL 27 mi79 min N 11 62°F 1021 hPa48°F
SAUF1 - St. Augustine, FL 37 mi64 min N 19 G 22 61°F 68°F1021.2 hPa (+2.3)47°F

Wind History for I-295 Bridge, St Johns River, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KXFL

Wind History from XFL (wind in knots)
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Last 24hr--Calm--------------------CalmCalmCalmW4NW5NW5W4NW5CalmCalm43
1 day agoCalmCalm--------------------CalmCalmNW6NW6NW6NW6N5W5N5N7W5Calm
2 days agoW5----------------------CalmCalmW5W10W10W10NW10
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Tide / Current Tables for Georgetown, St. Johns River, Florida (2)
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Georgetown
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Thu -- 12:23 AM EDT     2.49 feet High Tide
Thu -- 02:07 AM EDT     2.46 feet Low Tide
Thu -- 04:08 AM EDT     Moonset
Thu -- 04:11 AM EDT     2.50 feet High Tide
Thu -- 06:49 AM EDT     2.46 feet Low Tide
Thu -- 06:52 AM EDT     Sunrise
Thu -- 08:34 AM EDT     2.47 feet High Tide
Thu -- 10:57 AM EDT     2.43 feet Low Tide
Thu -- 12:50 PM EDT     2.46 feet High Tide
Thu -- 02:22 PM EDT     2.44 feet Low Tide
Thu -- 03:17 PM EDT     Moonrise
Thu -- 04:43 PM EDT     2.49 feet High Tide
Thu -- 06:44 PM EDT     2.47 feet Low Tide
Thu -- 07:57 PM EDT     Sunset
Thu -- 09:05 PM EDT     2.49 feet High Tide
Thu -- 11:24 PM EDT     2.45 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.52.52.52.52.52.52.52.52.52.52.42.42.42.52.42.42.52.52.52.52.52.52.52.5

Tide / Current Tables for Welaka, St. Johns River, Florida (5)
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Welaka
Click for Map
Thu -- 04:08 AM EDT     Moonset
Thu -- 05:26 AM EDT     2.87 feet Low Tide
Thu -- 06:52 AM EDT     Sunrise
Thu -- 08:10 AM EDT     2.96 feet High Tide
Thu -- 08:48 AM EDT     2.95 feet Low Tide
Thu -- 12:14 PM EDT     3.27 feet High Tide
Thu -- 03:17 PM EDT     Moonrise
Thu -- 05:57 PM EDT     2.88 feet Low Tide
Thu -- 07:57 PM EDT     Sunset
Thu -- 08:18 PM EDT     2.95 feet High Tide
Thu -- 09:23 PM EDT     2.94 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.23.23.13.132.92.92.93333.23.33.23.23.132.92.92.92.92.933.1

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