Tuesday, January21, 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 7:17AMSunset 5:49PM Tuesday January 21, 2020 4:56 AM CST (10:56 UTC) Moonrise 4:32AMMoonset 3:03PM Illumination 15% Phase: Waning Crescent; Moon at 26 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 210958 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 358 AM CST Tue Jan 21 2020

SHORT TERM (Through Wednesday).

Skies will gradually become mostly cloudy to cloudy today as cirrus overspreads the region. Look for light rain to begin moving into the area from the west after midnight and over the majority of the region north and west of the Highway 59/69 corridor by sunrise. Steady widespread light rain should persist across all of southeast Texas thru the day Wed, but not anticipating any problems during this timeframe as convective potential will be low. Potential for some embedded tstms increases some Wed evening & overnight . see Long Term section for more discussion. 47

LONG TERM (Wednesday night through Tuesday).

An active wet pattern will occur from late Wednesday through overnight Thursday morning. A few elements are aligning as we head into the early Thursday hours that will equate to a potential for locally heavy rainfall. One of these elements is in the upper levels where the polar jet is forecast to swing across the region Wednesday night into Thursday morning . the divergence brought on by the right rear quadrant of the jet streak will enhance lift in the vicinity of the Texas coastline. In the lower levels an amped up 40 knot low level jet will maintain an efficient inflow of near 1.3 or 1.4 inch pwats. These precipitable waters will be unseasonably high by cooler January standards (above the 75% quartile). One last element that will occur around the time of the best lift within a humid air mass will be areas of high PVA that will be riding up from the southwest just ahead of the passing 5H trough axis as it heads into the Mississippi River Valley. While the majority of the CWA will pick up 1 to 1.5 inches there will be areas that pick up greater than 3 inches. As of now, it looks as if the southwestern forecast or coastal counties will have the highest probability of picking up the highest rainfall from moderate rain and isolated thunderstorms. Some of this rain will be falling over areas just up the coast from Matagorda Bay, or those communities that have most recently picked up 3 to 5 inches this past Saturday. If Matagorda and Brazoria Counties pick up another 2 to 3 inches over these cooler, more saturated grounds (greater than 50% saturation within the upper foot depth soil layer), there could be localized flooding concerns Thursday morning, possibly before sunrise. WPC has placed the southwestern CWA under a marginal excessive rainfall outlook. A cold front veering winds to the west to northwest during the day Thursday will quickly push precipitation eastward and out of Southeast Texas by early afternoon. Low to middle 50s in the rain will warm to the middle to upper 60s (north) / lower 70s (south) under clearing skies and breezy northerly winds Thursday.

Backing high pressure expanding down into the state late Thursday through Friday will create mainly clear conditions with cold and dry air advection not being that overly overly sharp. We will get clipped by a continental air mass chilly enough to keep diurnal extremes in the normal morning 40s to daily 60s through the last weekend of the month. A shortwave trough is expected to deepen as it heads out of the Rockies and into the Southern Plains Sunday. This will introduce areawide low precipitation chances for showers.

A pleasant start to the next work week where partially cloudy days will warm back into the 70s and subsequent mornings become more mild (50s) as onshore flow returns on Monday and increases lower level moisture. The model suite is showing a fairly aggressive upper trough entering the OK-TX Panhandles late Tuesday. This will increase late Tuesday and Wednesday (1/28 and 1/29) shower and thunderstorm chances. So, this extended does agree with the 6-10 day CPC outlook of a 55% chance of above normal temperatures and a 50% chance of above normal precipitation in closing out this first month of 2020. 31

AVIATION.

VFR conditions expected for the next 18-21 hours with increasing Pacific cirrus. Ceilings will gradually fall as light rain begins moving into the region from the west after 8z . eventually into MVFR territory by sunrise and possibly IFR after 12z Wed. 47

MARINE.

Easterly winds will gradually veer to the southeast tonight and increase in speed. Expect building seas and above normal tide levels into Thursday. Small craft advisories will be likely. We'll be monitoring the tide levels as well. Currently, they're fcst to top out right around 3.5ft MLLW, but with additional wave run-up from the 7-10ft seas offshore . we could see some minor coastal flooding along the beaches around times of high tide late Wed afternoon and overnight. For those braving the 60 degree waters, rip currents will be a hazard regardless. As previous discussions have noted, the day shift may need to go w/ a beach hazards statement that sums everything up.

Rainfall will begin overspreading the waters from the west Wednesday morning with perhaps a few embedded thunderstorms Wednesday night. Precipitation will taper off Thursday morning with a cold frontal passage. Winds will return to the east late Friday and to the southeast early next week. 47

PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 59 43 54 52 65 / 0 90 90 100 30 Houston (IAH) 58 42 57 54 70 / 0 20 90 100 40 Galveston (GLS) 56 49 61 60 68 / 0 10 90 100 50

HGX WATCHES/WARNINGS/ADVISORIES. TX . NONE. GM . SMALL CRAFT SHOULD EXERCISE CAUTION from noon CST today through this afternoon for the following zones: Waters from Freeport to Matagorda Ship Channel TX from 20 to 60 NM . Waters from High Island to Freeport TX from 20 to 60 NM.



Short/Aviation/Marine . 47 Long . 31


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGPT2 - 8770613 - Morgans Point, TX 86 mi57 min E 7 G 8 50°F 62°F1032.3 hPa (-0.9)

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Huntsville, Huntsville Municipal Airport, TX13 mi64 minN 010.00 miFair35°F30°F82%1032 hPa

Link to 5 minute data for KUTS

Wind History from UTS (wind in knots)
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Last 24hrN3CalmN4CalmCalmNE7N54NE8454CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
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NE8463CalmCalmCalmCalmCalmCalmNW3CalmN3Calm
2 days agoS6S5SW3CalmS5SW5SW66
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Tide / Current Tables for Lynchburg Landing, San Jacinto River, Texas
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Lynchburg Landing
Click for Map
Tue -- 04:28 AM CST     Moonrise
Tue -- 07:15 AM CST     Sunrise
Tue -- 12:50 PM CST     -0.18 feet Low Tide
Tue -- 03:04 PM CST     Moonset
Tue -- 05:48 PM CST     Sunset
Tue -- 10:42 PM CST     1.50 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.31.31.31.21.110.80.60.40.2-0-0.1-0.2-0.10.10.30.60.81.11.31.41.51.5

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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wmap_A
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Houston/Galveston, TX (5,6,7,8)
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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.