Tuesday, January22, 2019 L-36.com


Marine Weather and Tides
Clear Lake Shores, TX

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 7:13AMSunset 5:50PM Tuesday January 22, 2019 7:01 AM CST (13:01 UTC) Moonrise 7:47PMMoonset 8:31AM Illumination 97% Phase: Waning Gibbous; Moon at 16 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
    EDIT      (on/off)   Help
GMZ335 Galveston Bay- 454 Am Cst Tue Jan 22 2019
.small craft advisory in effect from late tonight through Wednesday afternoon...
Today..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers in the morning, then a chance of showers in the afternoon.
Tonight..South winds 5 to 10 knots becoming northwest 20 to 25 knots after midnight. Bay waters smooth becoming rough after midnight. Showers. Isolated Thunderstorms after midnight.
Wednesday..North winds 15 to 25 knots becoming northwest 15 to 20 knots in the afternoon. Bay waters choppy. Isolated Thunderstorms early in the morning. Showers in the morning, then a chance of showers in the afternoon.
Wednesday night..Northwest winds 10 to 15 knots becoming north 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight.
Thursday..Northeast winds 5 to 10 knots becoming southeast in the afternoon. Bay waters smooth.
Thursday night..East winds around 5 knots becoming north after midnight. Bay waters smooth.
Friday..Northeast winds 5 to 10 knots becoming east in the afternoon. Bay waters smooth.
Friday night..Southeast winds 5 to 10 knots. Bay waters smooth.
Saturday..East winds 5 to 10 knots. Bay waters smooth. A chance of showers.
Saturday night..Northeast winds 5 to 10 knots becoming north after midnight. Bay waters smooth. A chance of showers.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 454 Am Cst Tue Jan 22 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Strong southerly winds will continue this morning with advisory conditions offshore. Colder shelf waters in the near shore waters of the gulf are holding down winds some and will keep small craft exercise caution going. Seas will remain rough offshore and all the way to the coast with a long enough southerly fetch. A cold front should push off the coast Wednesday morning shifting winds to the north. North winds could gust above gale force at times late Wednesday morning for areas off the coast from freeport to port o'connor with advisory conditions for the rest of the area. Advisory conditions will likely continue through the afternoon into Wednesday night. High pressure builds over the area Thursday with onshore winds developing for the end of the week.


7 Day Forecast for Marine Location Near Clear Lake Shores, TX
   Hourly   EDIT   Help
location: 29.55, -95     debug


Area Discussion for - Houston/Galveston, TX
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus64 khgx 221146
afdhgx
area forecast discussion
national weather service houston galveston tx
546 am cst Tue jan 22 2019

Aviation [12z TAF issuance]
A strong LLJ has developed over the area but moisture return has
not quite increased as much as expected. That moisture increase is
still expected today and should help support MVFR ceilings the
rest of the day into tonight. LLJ of near 40kts is pretty strong
but still enough mixing not to need llws in tafs. For now will go
with ceilings dropping to MVFR later this morning through the rest
of the afternoon. Cold front should reach kcll by 03z-ish and
then houston terminals 06z-ish and off the coast. Tafs will keep
mention of shra ra but would not be surprised if there were an
isolated storm for a brief mention of tsra. Likely time frame for
that will be along the front. Post frontal precipitation should
come to an end after 12z Wed or the end of the taf.

Overpeck

Prev discussion issued 409 am cst Tue jan 22 2019
Discussion
Radar imagery is quiet this morning across SE tx, though some of the
global guidance was indicating the potential for some light rain or
drizzle area wide. For example, nam12 this morning appears to be
overdone, currently placing light showers over our far eastern
zones, east of i-45 as well as north of i-10. The GFS and ecmwf
have trended drier in the short term, not increasing the chance
for scattered showers or drizzle until mid morning, out ahead of
today's cold front. Anticipate better coverage of streamer showers
and drizzle below the strong cap of dry air between 850 to 700mb
as seen in the forecast soundings by late morning, carrying on
through the remainder of the day. Most of today's precipitation
won't occur until later this evening associated with the frontal
boundary..

Overcast skies will hang tight today, keeping high temperatures in
the mid 60s to low 70s. Onshore flow will place dewpoints in the
upper 50s to low 60s. Forecast soundings indicate precipitable
waters (pws) between 0.60 to 0.80 inches for much of the day,
increasing through the overnight hours to between 1.10 to 1.30
inches, approximately a quarter to half inch above normal pws for
this time of year. Pressure falls will continue over NW nm into n
tx as the cold front tracks eastward. This area of low pressure
will take a SE dive through S ok and across the red river valley
this afternoon, with a cold front trailing behind. There is fairly
good agreement on the timing of this cold front. Showers and a few
isolated thunderstorms will be possible with the frontal passage,
mainly during the evening and overnight hours, with the front
pushing off the coast early Wednesday morning. Based on the global
guidance 00z runs, the wind shift and associated precipitation
should reach our northern zones from burleson to houston counties
between 9 to 11 pm, i-10 and the metro around 11pm and 2am, and
finally the coast closer to 2 to 5am. Forecast soundings show
little in the way of instability, with the best lapse rates of 5-6
c km looking to occur during the early morning hours with little
in the way of cape. Still cannot rule out a few isolated rumbles
of thunder as the main line of precipitation pushes southward. The
chance for a wintry mix of precipitation across our far northern
counties appears unlikely at this time. The timing of the best
moisture and coldest temperatures appear out of phase, and
forecast soundings show ample drying in the mid levels, acting to
hinder the development of wintry precipitation. Additionally,
surface temperatures should remain above freezing, so impacts look
to be minimal even if isolated pockets of wintry precipitation
do occur. We will continue to monitor this time frame closely as
we receive updated model guidance and data moving forward.

Surface high pressure will build in behind the front by Wednesday
morning and remain overhead through early Friday morning. Skies
will clear from NW to SE Wednesday, with clear skies area wide by
late Wednesday afternoon. Dry air will usher in behind this
feature as well, and pws drop well below a quarter of an inch.

With the ridge in control across the region, anticipating a
substantial swing in the diurnal temperatures. High temperatures
in the mid 40s to low 50s and low temperatures Wednesday into
Thursday in the upper 20s to 30s. Wednesday should be the coldest
day through the next week. The warming trend ensues Thursday and
Friday with high temperatures in the 50s and low temperatures 30s
to 40s.

Partly cloudy skies will return to the forecast Saturday. Onshore
flow is anticipated early Saturday morning out ahead of the next
frontal feature which looks to move through the region late
Saturday into Sunday. This front will bring our next best chance
for precipitation, with the potential for area wide showers
Saturday afternoon into Sunday morning. Still plenty of
uncertainty in the extended with various solutions amongst
global guidance, with the ECMWF remaining the wettest solution at
this time. Additionally, global guidance also hints at another
cold front looking to reach SE tx late Monday into Tuesday.

Hathaway

Marine
Strong onshore flow should continue this morning and then begin to
decrease later this afternoon. 42019 buoy had a recent gust of 33
knots with sustained winds at 25 knots. Colder gulf shelf waters are
holding down wind near the coast where the 42035 buoy has 10-15 kt
winds. Stronger winds are pushing seas higher with 9ft at the 42019
and 6ft at 42035. Advisory and cautions will continue this morning
with an advisory for the offshore waters this afternoon mainly for
higher seas. Seas should not subside much ahead of the front given
the long southerly fetch.

Cold front is slated to push off shore around 09z Wednesday. Overall
looks like there will be a chance at some frequent gusts above gale
force for the offshore waters from freeport to matagorda so we will
issue a gale watch for those areas from 10z to 18z Wednesday. Small
craft advisory will be issued for the rest of the marine waters of
the upper texas coast. Advisory conditions will continue after 18z
Wednesday and subside Wednesday night. Return flow sets up for the
end of the week with southerly winds as high pressure moves east.

Tides to start out today are a good 1 foot above normal and likely
see higher tides continue through today. With the cold front pushing
through Wednesday morning, we may need to monitor tides for a low
water advisory by Wednesday afternoon for low tide. Tide levels
could swing to about 1 foot below normal.

Overpeck

Preliminary point temps pops
College station (cll) 70 38 49 32 58 50 70 30 0 0
houston (iah) 71 40 49 33 57 30 100 60 0 0
galveston (gls) 67 44 49 41 54 20 90 90 0 0

Hgx watches warnings advisories
Tx... None.

Gm... Small craft advisory from 4 am to 6 pm cst Wednesday for the
following zones: coastal waters from high island to
freeport tx out 20 nm... Galveston bay... Matagorda bay.

Small craft should exercise caution until noon cst today for the
following zones: matagorda bay.

Gale watch from late tonight through Wednesday morning for the
following zones: coastal waters from freeport to matagorda
ship channel tx out 20 nm... Waters from freeport to
matagorda ship channel tx from 20 to 60 nm.

Small craft advisory until noon cst today for the following
zones: coastal waters from freeport to matagorda ship
channel tx out 20 nm... Coastal waters from high island to
freeport tx out 20 nm.

Small craft advisory from noon to 6 pm cst Wednesday for the
following zones: coastal waters from freeport to matagorda
ship channel tx out 20 nm... Waters from freeport to
matagorda ship channel tx from 20 to 60 nm.

Small craft should exercise caution from noon cst today through
late tonight for the following zones: coastal waters from
freeport to matagorda ship channel tx out 20 nm... Coastal
waters from high island to freeport tx out 20 nm.

Small craft advisory until 6 pm cst Wednesday for the following
zones: waters from high island to freeport tx from 20 to 60
nm.

Small craft advisory until 4 am cst Wednesday for the following
zones: waters from freeport to matagorda ship channel tx
from 20 to 60 nm.

Aviation... Overpeck


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EPTT2 - 8771013 - Eagle Point, TX 6 mi32 min S 13 G 14 60°F 54°F1014.5 hPa
MGPT2 - 8770613 - Morgans Point, TX 9 mi32 min SSE 7 G 13 61°F 55°F1014.3 hPa
GRRT2 18 mi32 min SSE 8 G 11 61°F 56°F1014.7 hPa
NCHT2 - 8770777 - Manchester, TX 19 mi32 min S 8 G 15 64°F 63°F1013.1 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 20 mi32 min SSE 11 G 13 61°F 57°F1014.7 hPa
GTOT2 20 mi32 min SSE 6 G 8.9 62°F 58°F1014.6 hPa
RLOT2 - 8770971 - Rollover Pass, TX 26 mi32 min S 11 G 15 62°F 1015.3 hPa
HIST2 32 mi32 min SSE 6 G 8 60°F 54°F1015.8 hPa
LUIT2 33 mi32 min SSE 9.9 G 13 63°F 57°F1014.3 hPa
KXIH 36 mi27 min S 16
42035 - GALVESTON 22NM East of Galveston, TX 38 mi32 min SSE 12 G 16 62°F 58°F1016.3 hPa60°F
42043 - GA-252 TABS B 40 mi122 min S 19 G 23 59°F1013.7 hPa (-2.8)
FCGT2 - 8772447 - USCG Freeport, TX 45 mi32 min SSE 9.9 G 12 62°F 58°F1014.5 hPa
FPST2 45 mi32 min SSE 12 G 15 63°F 58°F1013.6 hPa

Wind History for Eagle Point, TX
(wind in knots)    EDIT      (on/off)   Help
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
Last
24hr
SE11
SE11
SE10
SE10
G13
S11
S12
S10
SE9
SE8
SE10
SE9
S7
SE11
SE12
G15
S10
SE14
S12
S11
S9
S9
S13
S9
S9
S18
G23
1 day
ago
N10
G16
N12
G19
N12
G17
N11
G15
N6
G10
N10
N7
G11
N7
G11
N5
G8
E6
NE3
NE8
E6
E5
E5
E4
E6
SE2
G6
NW2
NW1
--
SE8
S8
SE13
2 days
ago
NW13
G23
NW15
G23
NW11
G21
NW14
G25
NW13
G21
NW15
G25
NW15
G29
NW15
G21
N17
G26
NW12
G20
N15
G25
N15
G24
N10
G23
N15
G20
N11
G21
N11
G22
N9
G17
NW9
G19
N11
G16
N8
G15
N13
G20
N12
G19
N12
G19

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX10 mi72 minSSE 1210.00 miMostly Cloudy63°F53°F73%1014.9 hPa
Houston, Pearland Regional Airport, TX13 mi69 minSSE 910.00 miOvercast63°F57°F81%1014.7 hPa
Houston, Houston Hobby Airport, TX16 mi69 minSSE 910.00 miMostly Cloudy63°F54°F73%1014.3 hPa
Galveston, Scholes Field, TX21 mi70 minSSE 910.00 miOvercast62°F57°F86%1015.5 hPa
John Dunn Helistop, TX24 mi67 minN 0 G 1110.00 miMostly Cloudy63°F55°F77%1013.9 hPa

Wind History from EFD (wind in knots)
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
Last 24hrNE3NE5E6SE10SE14SE12SE11
G16
SE15
G18
SE11
G16
SE9--E7SE6SE9SE7SE10SE10SE10SE10SE10SE10SE10SE12S12
1 day agoNW13--NW10NW10----NW7N4NE4N4NE4CalmCalmCalmCalm--Calm--Calm--Calm--CalmCalm
2 days agoNW18
G30
NW21
G33
NW19
G26
NW21
G31
NW21
G30
NW18
G25
NW20
G25
NW18
G27
NW22
G28
NW19
G29
NW19
G24
NW20
G29
NW15
G24
NW14
G22
NW18NW10NW10NW11NW10----NW13NW13NW13

Tide / Current Tables for Clear Lake, Harris Co. Park, Texas
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Clear Lake
Click for Map
Tue -- 12:36 AM CST     0.56 feet High Tide
Tue -- 05:33 AM CST     0.39 feet Low Tide
Tue -- 07:14 AM CST     Sunrise
Tue -- 08:31 AM CST     Moonset
Tue -- 09:12 AM CST     0.49 feet High Tide
Tue -- 05:17 PM CST     -0.82 feet Low Tide
Tue -- 05:49 PM CST     Sunset
Tue -- 07:47 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.50.60.50.50.40.40.40.40.50.50.50.40.2-0.1-0.3-0.6-0.7-0.8-0.8-0.7-0.5-0.20.10.3

Tide / Current Tables for Bolivar Roads, Texas Current
   EDIT      (on/off)   Help   One Week of Data
Bolivar Roads
Click for Map
Tue -- 01:00 AM CST     -0.00 knots Slack
Tue -- 02:42 AM CST     -0.18 knots Max Ebb
Tue -- 03:13 AM CST     -0.17 knots Min Ebb
Tue -- 07:12 AM CST     Sunrise
Tue -- 08:29 AM CST     Moonset
Tue -- 10:22 AM CST     -2.66 knots Max Ebb
Tue -- 02:52 PM CST     0.00 knots Slack
Tue -- 05:48 PM CST     Sunset
Tue -- 06:14 PM CST     2.37 knots Max Flood
Tue -- 07:46 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.3-0-0.2-0.2-0.2-0.5-0.9-1.5-2.1-2.5-2.6-2.6-2.4-1.8-10.11.222.42.321.61.20.8

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
GOES 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 (8,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Houston/Galveston, TX
   (on/off)   Help
weather_mapweather_map weather_map

Gulf Stream Current


Ad by Google

Disclaimer:
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 numerious 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.