Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Bolivar Peninsula, TX

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:47AMSunset 5:23PM Tuesday November 21, 2017 6:01 AM CST (12:01 UTC) Moonrise 9:20AMMoonset 8:04PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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 Matagorda Bay-galveston Bay- 326 Am Cst Tue Nov 21 2017
.small craft advisory in effect from this evening through Wednesday morning...
Today..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and isolated Thunderstorms.
Tonight..Northeast winds 15 to 20 knots increasing to 20 to 25 knots after midnight. Bay waters choppy becoming rough after midnight. A slight chance of showers and isolated Thunderstorms.
Wednesday..North winds 15 to 25 knots becoming 15 to 20 knots in the afternoon. Bay waters choppy.
Wednesday night..North winds 10 to 15 knots. Bay waters slightly choppy.
Thursday..North winds 5 to 10 knots. Bay waters smooth.
Thursday night..Northeast winds 5 to 10 knots. Bay waters smooth.
Friday..East winds around 5 knots becoming south in the afternoon. Bay waters smooth.
Friday night..Southwest winds 5 to 10 knots. Bay waters smooth.
Saturday..Southwest winds around 5 knots becoming south in the afternoon. Bay waters smooth.
Saturday night..Northwest winds around 5 knots becoming north after midnight. Bay waters smooth.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 326 Am Cst Tue Nov 21 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Onshore winds are expected to continue with high pressure east of the area. Scattered showers and Thunderstorms will be possible across the coastal waters ahead of a cold front. Winds will increase quickly behind the front, and a small craft advisory is in effect for the marine areas for late tonight into early Wednesday. Conditions are expected to improve by Thursday with a light onshore flow becoming established by Friday.

7 Day Forecast for Marine Location Near Bolivar Peninsula, TX
   Hourly   EDIT   Help
location: 29.49, -94.56     debug


Area Discussion for - Houston/Galveston, TX
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus64 khgx 211016
afdhgx
area forecast discussion
national weather service houston galveston tx
416 am cst Tue nov 21 2017

Discussion
Evening upper air analysis showed southeast texas located in
between two mid-level disturbances, one located over louisiana and
a second located over the texas panhandle. Mid to high clouds
associated with this secondary disturbance are evident streaming
over the region on early morning goes-16 infrared imagery with a
second, lower level of clouds building into the region as moisture
gradually returns from the gulf. In addition to these lower
clouds, signs of this moisture return is also evident with the
isolated to scattered showers developing across the coastal waters
this morning along a coastal trough axis of surface convergence
stretching from freeport southwest towards brownsville.

As southwesterly low-level flow pushes this surface boundary up
the texas coast through the day and nudges inland, shower
coverage is expected to expand across the coastal waters and move
into areas east of a palacios to huntsville line this morning.

Increasing instability as a result of mid-level cooling from the
approach of the panhandle shortwave trough as well as a 60-80 knot
upper level jet nosing into the northwestern gulf today should
provide favorable conditions for thunderstorms to also develop
along the boundary. 00z convection allowing models (cams) have a
fairly consistent signal for scattered showers and thunderstorms
to develop this morning with what appears to be a thunderstorm
complex developing somewhere across the eastern waters later this
afternoon. Have increased rain chances for the marine areas as a
result and pulled the isolated thunderstorm mention farther inland
east of a freeport to houston to livingston line. 0-6 km bulk
shear values over the waters increase to 25-30 knots this
afternoon and have concerns that this may result in enough
organization for a few strong or severe thunderstorms over the
coastal waters today. Marine forecast soundings show a fairly
persistent dry layer of air between 700-500 mb with evaporative
cooling within this layer promoting lower freezing levels and at
least a small hail threat within stronger thunderstorms over the
waters this afternoon into this evening before the thunderstorms
push east towards coastal louisiana. If the thunderstorm complex
the cams have shown does develop, rain chances farther inland
today may be much lower than the 20-40 percent currently
advertised as the coastal storms rob southeast texas of better
moisture inflow.

A cold front located across the northern plains early this morning
will continue to trudge south during the day today, reaching the
brazos valley this evening, houston metro around midnight, and
pushes off the coast by sunrise Wednesday. Weak convergence along
the front may produce a few showers as it sweeps across the region
this evening and tonight with relatively drier and cooler air
being ushered back into the region behind it. Highs today in the
70s will be replaced by highs in the 60s tomorrow with dry
conditions again resuming across the region on Wednesday as north
flow aloft becomes established in the wake of today's shortwave
trough.

The weather on thanksgiving will certainly be something to give
thanks for as dry north flow aloft persists and results in sunny
skies and highs in the mid to upper 60s. North flow aloft becomes
more of a northwest flow aloft on Friday as a northern stream
shortwave trough dives across the great lakes towards the mid-
atlantic states and upper ridging builds in from the west.

Temperatures will gradually warm back into the mid 70s to near 80
by Saturday as ridging spreads eastward, but the northern stream
disturbance looks to send a weak cold front into the region late
Saturday into Sunday and moderate temperatures a few degrees by
the end of the weekend. With the region remaining closed off from
the gulf through the end of the week, expect the frontal passage
to be dry. Upper ridging continues to build across texas during
the late weekend and into early next week with temperatures again
warming back into the mid to upper 70s.

Huffman

Marine
Light onshore flow will persist today with high pressure over the
eastern us and low pressure over the southern plains. A cold
front will cross the coastal waters this evening and usher in a
strong offshore flow. Nne winds will increase to 20-25 kts with
gusts approaching gale force over the gulf waters. A small craft
advisory is in effect for tonight into early Wednesday and a gale
watch warning may yet be required for the offshore waters as gusts
may frequently gust in excess of gale force. A moderate offshore
wind will persist Wednesday night and a scec will be needed. Winds
will decrease on Thursday as high pressure settles over S tx. The
high pressure will move east of the area on Friday and onshore
winds will return. Another cold front will cross the region
Saturday night with moderate offshore winds in the wake of the
front on Sunday.

43 22

Preliminary point temps pops
College station (cll) 74 51 61 36 66 10 20 10 0 0
houston (iah) 74 56 65 40 66 30 20 10 0 0
galveston (gls) 75 61 67 50 64 40 30 10 0 0

Hgx watches warnings advisories
Tx... None.

Gm... Small craft advisory from 11 pm this evening to 11 am cst
Wednesday for the following zones: coastal waters from
freeport to the matagorda ship channel out 20 nm... Coastal
waters from high island to freeport out 20 nm... Galveston
bay... Matagorda bay... Waters from freeport to the matagorda
ship channel from 20 to 60 nm... Waters from high island to
freeport from 20 to 60 nm.

Discussion... 14
aviation marine... 43 22


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
RLOT2 - 8770971 - Rollover Pass, TX 3 mi43 min SE 13 G 16 67°F 63°F1012.9 hPa
HIST2 12 mi49 min ESE 5.1 G 7 66°F 66°F1013.3 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 13 mi49 min SE 12 G 14 67°F1012.6 hPa
GTOT2 17 mi43 min 68°F 69°F
EPTT2 - 8771013 - Eagle Point, TX 19 mi49 min ESE 1 G 2.9 65°F 63°F1013.2 hPa
42035 - GALVESTON 22NM East of Galveston, TX 19 mi71 min SE 18 G 19 70°F 71°F3 ft1012.5 hPa (-2.2)63°F
KXIH 22 mi26 min SSW 15 70°F 61°F
GRRT2 22 mi43 min 65°F 63°F1013.1 hPa
MGPT2 - 8770613 - Morgans Point, TX 26 mi43 min ENE 4.1 G 5.1 63°F 68°F1013.4 hPa
SRST2 - Sabine Pass, TX 31 mi61 min ESE 8.9 G 11 66°F 1014 hPa (-1.9)62°F
TXPT2 40 mi43 min ESE 13 G 16 66°F 66°F1013.1 hPa
SBPT2 - 8770570 - Sabine Pass North, TX 40 mi49 min ESE 8.9 G 12 66°F 68°F1015.3 hPa
NCHT2 - 8770777 - Manchester, TX 41 mi43 min NW 1.9 G 4.1 60°F 70°F1012.9 hPa
LUIT2 41 mi61 min 69°F
PORT2 - 8770475 - Port Arthur, TX 42 mi43 min E 4.1 G 7 59°F 67°F1014.1 hPa
KVBS 49 mi21 min E 15 G 20 68°F 61°F

Wind History for Rollover Pass, TX
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last
24hr
NE11
NE13
NE13
NE11
E11
E8
E10
SE7
E7
E9
SE9
G12
SE9
E6
G9
SE9
SE10
G13
SE11
SE11
G14
SE11
G15
SE10
SE11
SE11
G14
SE11
SE12
G15
SE13
1 day
ago
N14
G17
N11
G16
N14
G17
NE14
G19
NE19
G24
N16
G20
N14
G17
N10
G15
N10
G16
N10
N11
N10
NE7
N10
N8
NE7
NE8
NE7
NE9
NE9
NE8
NE10
NE10
NE11
2 days
ago
SW8
G12
SW4
G8
SW5
G9
SW8
G12
SW10
G14
SW10
G16
SW14
G18
SW11
G16
SW9
G16
SW9
G16
NW10
NW7
N23
G31
N23
N19
G24
N17
G21
N17
G24
N24
N20
G28
N19
G25
N20
G25
N16
G20
N14
G17
N13
G16

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galveston, Scholes Field, TX22 mi69 minSE 710.00 miOvercast69°F64°F87%1013 hPa
High Island 179A (Apache Corp), LA22 mi66 minS 179.00 miOvercast70°F62°F78%1012.5 hPa

Wind History from XIH (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 24hrSE14SE14SE16SE13
G18
SE12SE10
G17
SE10S7SE9SE7SE11SE10SE11SE11S11S12S14S16S13SE13S15S16S17S13
G21
1 day agoNE31
G37
----E25
G31
------NE14NE11NE7
G13
NE9
G15
NE13NE12
G20
NE13NE13E13E13E15E11E13
G19
E11E11
G16
E11
G17
E14
2 days agoW16
G22
W18W16W18W19W19W19W11W17W15
G22
W12W10N12
G20
N16
G22
N18
G24
NE27
G34
NE30
G38
NE27
G34
NE27
G34
----------

Tide / Current Tables for Rollover Pass, Texas
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Rollover Pass
Click for Map
Tue -- 02:08 AM CST     1.35 feet High Tide
Tue -- 06:47 AM CST     Sunrise
Tue -- 09:19 AM CST     Moonrise
Tue -- 02:10 PM CST     0.02 feet Low Tide
Tue -- 05:20 PM CST     Sunset
Tue -- 08:04 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.31.31.41.31.31.31.21.210.80.60.40.20.1000.10.20.50.70.91.11.21.2

Tide / Current Tables for Galveston Bay Entrance, Texas Current
   EDIT      (on/off)   Help   One Week of Data
Galveston Bay Entrance
Click for Map
Tue -- 12:43 AM CST     -0.00 knots Slack
Tue -- 06:47 AM CST     Sunrise
Tue -- 09:19 AM CST     Moonrise
Tue -- 09:56 AM CST     -2.43 knots Max Ebb
Tue -- 02:56 PM CST     0.00 knots Slack
Tue -- 05:21 PM CST     Sunset
Tue -- 06:29 PM CST     1.96 knots Max Flood
Tue -- 08:05 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1-0-0.2-0.4-0.5-0.6-1-1.5-2.1-2.4-2.4-2.3-2-1.4-0.700.81.51.91.91.61.41.10.7

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Houston/Galveston, TX (7,2,3,4)
      (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.