Thursday, April18, 2019

Marine Weather and Tides
Florence, AL

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:13AMSunset 7:26PM Thursday April 18, 2019 12:14 PM CDT (17:14 UTC) Moonrise 6:45PMMoonset 6:03AM Illumination 99% Phase: Waxing Gibbous; 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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7 Day Forecast for Marine Location Near Florence, AL
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location: 34.83, -87.67     debug

Area Discussion for - Huntsville, AL
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Fxus64 khun 181713
area forecast discussion
national weather service huntsville al
1213 pm cdt Thu apr 18 2019

For 18z tafs.

Near term (rest of today)
issued at 837 am cdt Thu apr 18 2019
a band of high based showers virga was moving northeast along the
i-65 corridor. However, based on obs and morning soundings, the lower
to mid atmosphere is rather dry and un-supportive of precipitation at
this point. A surface ridge axis in central al and ms may also tend
to limit southerly moisture return until later this afternoon.

Moderate to heavy rain and thunderstorms was slowly crossing the ms
river at this time. A stronger qcls was starting to take shape in la.

Uncertainty remains rather high on whether deep convection and severe
weather will develop with the northern portion of the mcs. Pre-
frontal convection may be held at bay due to the dry air and a
capping inversion at ~815mb. For now, will keep the forecast about
as is. The MCS may reach northwest al this afternoon, but in a
rather weak state. Intensification may take place by late afternoon
as low level moist advection improves. But a few of the cams suggest
that the MCS may arrive too soon for this to occur or could severe
limit destabilization ahead of a secondary line this evening. In any
event, no significant changes at this time so we can absorb the 12z

Short term (tonight through Saturday)
issued at 355 am cdt Thu apr 18 2019
looks as though most convective activity will be east of northern
alabama by around 4 am or before. Rainfall totals between 1 and 2
inches with locally higher amounts possible still looks possible

Colder air will push into the area during the day on Friday. With
wrap around forcing associated with the departing surface low with
this storm system, scattered to more numerous showers will continue
through the day. Clouds, cold air advection, and precipitation should
keep highs in the lower to mid 50s. Most guidance lingers this
precipitation and cloud cover through the overnight hours on Friday.

Even colder temperatures are expected then with lows in the upper
30s to lower 40s.

A stout inversion will likely help to maintain low stratus in the
morning on Saturday, and potentially some patchy drizzle (especially
along the higher terrain of the cumberland plateau region in
northeast alabama and southern middle tennessee). The aforementioned
drier air will continue to advect into the region, helping to scour
out the cloud cover from west to east over the course of the morning
and into the early afternoon. High pressure will begin to nose it's
way in from the west, with the strong subsidence helping to maintain
clear conditions for the remainder of the day. Saturday afternoon
should be mostly sunny and clear by the mid to late afternoon.

However, northerly flow will help to keep temperatures 10-15 degrees
below normal for april 20th. Highs in the upper 50s seem probable for
the higher terrain of the cumberland plateau, with lower 60s
elsewhere across the tennessee valley.

Long term (Saturday night through Wednesday)
issued at 355 am cdt Thu apr 18 2019
a deepening upper-low will continue to pull away from the southern
appalachians Saturday night as it shifts into the mid-atlantic
region. High pressure will build into the tennessee valley and deep
south on easter Sunday into early next week, promoting dry and benign
weather. The result will be a quick warm-up and return to seasonable
temperatures in the mid to upper 70s. Southerly flow will deepen
Monday and Tuesday, and with a mostly clear sky, this will result in
temperatures approaching or exceeding the 80 degree mark in some
places. Late in the period, a developing longwave trough over the
great plains will begin to track toward the mississippi valley. Some
weak lift impulses ahead of this system may be enough to generate
some widely scattered rain showers and partly to mostly cloudy
conditions on Wednesday. Models differ on the timing and magnitude of
this system, so have taken a conservative approach to pops and
remained close to the model blend.

Aviation (for the 18z tafs through 18z Friday afternoon)
issued at 1213 pm cdt Thu apr 18 2019
vfr conditions are expected this afternoon. Ceilings should remain at
or above ~040agl. Southerly flow will increase to 20-22kt with gusts
of 30-32kt by 21-22z. An area of showers and thunderstorms will
arrive from 00-02z at kmsl and 01-03z at khsv. However, timing
uncertainty remains on this and could change. The storms will lower
visibility to 2sm or less (ifr) with gusts of 40kt or greater
possible at the leading edge of the thunderstorms (i.E. Gust front).

Then a 2-4 hour period of moderate rainfall is expected with
embedded thunderstorms possible. Visibility could remain around 2sm
(ifr) at times during this rain with ceilings ~015agl. A cold front
will shift winds to the northwest at 11-12z with gusts over 20kt
persisting. Ceilings will remain at 015-025agl (MVFR) with isolated
to scattered showers possible.

Hun watches warnings advisories
Al... None.

Tn... None.

Near term... 17
short term... Ktw amp.24
long term... Amp.24
aviation... 17
for more information please visit our website
at weather.Gov huntsville.

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muscle Shoals, North West Alabama Regional Airport, AL6 mi21 minS 13 G 2210.00 miA Few Clouds77°F60°F56%1009.3 hPa

Wind History from MSL (wind in knots)
Last 24hrS14
1 day agoSW7SW15
2 days ago63--W5SE3SW6SW4CalmCalmCalmCalmCalmCalmCalmSE3CalmCalmCalmSE4CalmS4SW6S10SW6

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Huntsville, AL (13,3,4,5)
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Ground Weather Radar Station Northern Alabama
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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 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 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.