Saturday, July11, 2020
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Marine Weather and Tides
Riverside, TX

Version 3.4
NOTICE
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 6:26AMSunset 8:28PM Saturday July 11, 2020 12:06 PM CDT (17:06 UTC) Moonrise 11:53PMMoonset 11:26AM Illumination 63% Phase: Waning Gibbous; Moon at 21 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 Riverside, TX
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location: 30.88, -95.42     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 111104 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 604 AM CDT Sat Jul 11 2020

AVIATION [12Z TAF Issuance].

Ragged MVFR deck for terminals north of Houston early this morning. Tiny chance some MVFR expands down to IAH, so have a SCT015 there at open to hint at that. More likely, these clouds dissipate rapidly after sunrise, leaving us VFR across the area.

Winds to be lighter than yesterday. There will be the usual SW -> onshore -> SW diurnal trend, but high pressure near enough that afternoon winds will be more SSW or S than SE. Some guidance hinting at light/MVFR fog at the northern terminals overnight. Should be too dry, but hedge with an MIFG at CLL and CXO, as fog likely would form if moisture ends up being sufficient.

PREV DISCUSSION /Issued 324 AM CDT Sat Jul 11 2020/.

DISCUSSION. (Corrected for proper Long Term and Marine)

Heat - higher than typical, even by Southeast Texas standards - continues to be the main feature of the forecast again tonight. A focus on heat illness and heat safety should stay at the forefront for any who are spending long stretches outdoors, are exerting themselves heavily even for short stretches, and those who are sensitive to high heat.

The main nuances in the forecast are how the specific interplay between high air temperatures and humidity will impact the daily heat index. For example, slightly lower dewpoints expected this afternoon may keep us from seeing the high peaks in heat index we saw yesterday, but still plenty high enough to require a heat advisory.

Ridging through the atmosphere will continue to dominate deep into the upcoming week, keeping the heat in place for several days. As the strength of the ridge looks to slowly come down deeper into next week, along with some potential for an inverted trough crossing the Gulf in the second half of the week, we will see some low chances of showers and storms to pop up again in the afternoons late this week. It may not be much, but at least it's something.


SHORT TERM [Through Sunday].

Y'all, it's hot. A more appropriate word may be gross. It's 3 am and the heat index at Galveston has managed to fall all the way to 97. Heat records - especially for our low temperatures - are a daily routine. So while there will always be a few who can't help but say "bUt it'S SumMeR, iT's SupPosED tO Be HOt!", we still find ourselves in a position where this exceeds even our hearty SE Texas norms.

Given that the midlevel ridge centered just to our west over New Mexico maxes out with heights that begin with a 6 digit, the unseasonably hot conditions are not a huge surprise. As far as today is concerned, it appears that the surface high over the Northwest Gulf will drift close enough to shore to keep winds veered a little more today. This should decrease the onshore component of winds, and let us mix out a little more effectively than yesterday both this afternoon and tomorrow afternoon. The result should be slightly lower dewpoints, leading to a slightly lower peak heat index.

This is all me searching for nuances in the forecast, as the end result still justifies a heat advisory across the entire area today. Another heat advisory will likely be needed tomorrow, but since the forecast heat index is hanging out near the advisory threshold, I will let today play out before making a call on tomorrow.

LONG TERM [Sunday Night Through Saturday].

The main message continues to be hot and humid conditions, making for a prolonged period of very uncomfortable days. Upper-level ridge centered over the southwest CONUS and surface high pressure over the Gulf of Mexico will continue to provide dry conditions (subsidence) and unseasonable temperatures into the region. While the hottest conditions look to remain across western/central TX, Monday is shaping up to be another hot day. 850 hPa temperatures will climb into the 23 to 26 C range under a west to south-southwest flow, keeping the low-to-mid layer warm. High temperatures will once again be close to or above the triple digits. Hot conditions and dewpoints in 70s will lead to heat indices around 105-110 degrees. Heat headlines are likely for this period.

Ridge aloft expands and somewhat flattens across the southern Plains after Tuesday, bringing a "relief" in temperatures. Daytime temperatures will warm into the mid to upper 90s and overnight lows will range from the upper 70s to low 80s. The heat continues but temperatures will be near the standard levels for early July.

Precipitation chances may rebound again towards the end of the week as the upper-level ridge nudges slightly east and allow for vort maxes to ride over it. Given the nature of these disturbances, confidence in timing/strength is pretty low. At this time, the best forcing looks to be across eastern TX/western LA. Have only kept some spotty chances across our region.

MARINE.

High pressure centered over the Gulf of Mexico will continue to bring south to southwest flow/winds today and Sunday. Gusty winds from 15 to 20 kts are possible along the coast during the afternoon and offshore at night. Seas will mainly between 2-3 feet into early next week. Small Craft Exercise Caution will be possible at times.

CLIMATE.

Another couple of daily records were set again yesterday - both Galveston and Hobby tied their record high minimums from 2016.

All climate sites are currently at or above their record high mins for today right now, so all four of those records are on the table still, though the Houston sites and Galveston are probably more of a threat than College Station. This afternoon, both Houston sites and Galveston will also be within shouting distance of their record highs. The record with the best chance to fall is probably Hobby's 100 degree record high for today. College Station's impressive record of 110 degrees for today is almost certainly safe.

PRELIMINARY POINT TEMPS/POPS.

College Station (CLL) 100 76 102 78 102 / 0 0 0 0 0 Houston (IAH) 100 78 101 79 100 / 0 0 0 0 0 Galveston (GLS) 93 81 93 82 91 / 0 0 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES.

TX . Heat Advisory from 11 AM this morning to 8 PM CDT this evening for the following zones: Austin . Brazoria Islands . Brazos . Burleson . Chambers . Coastal Brazoria . Coastal Galveston . Coastal Harris . Coastal Jackson . Coastal Matagorda . Colorado . Fort Bend . Galveston Island and Bolivar Peninsula . Grimes . Houston . Inland Brazoria . Inland Galveston . Inland Harris . Inland Jackson . Inland Matagorda . Madison . Matagorda Islands . Montgomery . Northern Liberty . Polk . San Jacinto . Southern Liberty . Trinity . Walker . Waller . Washington . Wharton.

GM . None.



DISCUSSION . Luchs SHORT TERM . Luchs LONG TERM . 05 AVIATION . Luchs MARINE . 05 CLIMATE . Luchs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGPT2 - 8770613 - Morgans Point, TX 86 mi49 min WNW 8 G 9.9 87°F 88°F1017.5 hPa

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Huntsville, Huntsville Municipal Airport, TX13 mi74 minSSW 610.00 miA Few Clouds89°F73°F59%1017.6 hPa

Link to 5 minute data for KUTS

Wind History from UTS (wind in knots)
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Last 24hr54E44SW5S6CalmCalmSE335S6S7S7S7S6S43SW4SW6SW9SW8SW6S7
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Tide / Current Tables for Lynchburg Landing, San Jacinto River, Texas
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Lynchburg Landing
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Sat -- 12:22 AM CDT     Moonrise
Sat -- 12:41 AM CDT     0.82 feet High Tide
Sat -- 06:28 AM CDT     Sunrise
Sat -- 07:39 AM CDT     0.49 feet Low Tide
Sat -- 12:25 PM CDT     Moonset
Sat -- 03:00 PM CDT     1.11 feet High Tide
Sat -- 08:23 PM CDT     Sunset
Sat -- 10:30 PM CDT     0.65 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.80.80.70.70.60.50.50.50.50.60.70.911.11.11.110.90.90.80.70.70.7

Tide / Current Tables for San Jacinto Battleground State Historic Site, Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map
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GEOS Local Image of SouthCentralPlains    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.
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Wind Forecast for Houston/Galveston, TX (13,3,4,5)
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Ground Weather Radar Station Houston/Galveston, TX
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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 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 numerous 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.