Thursday, December13, 2018 L-36.com


Marine Weather and Tides
Blanchard, LA

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 7:07AMSunset 5:12PM Thursday December 13, 2018 4:46 PM CST (22:46 UTC) Moonrise 11:45AMMoonset 10:57PM Illumination 38% Phase: Waxing Crescent; Moon at 6 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 Blanchard, LA
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location: 32.58, -94     debug


Area Discussion for - Shreveport, LA
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Fxus64 kshv 132158
afdshv
area forecast discussion
national weather service shreveport la
358 pm cst Thu dec 13 2018

Short term tonight through Friday night
upper level low continues to pivot eastward into central texas
late this afternoon with broad area of lift entering our western
zones where new showers and isolated thunderstorms have begun to
develop. This convection is more scattered compared to what has
been observed for much of today where widespread showers and
isolated storms have gradually waned in coverage this afternoon.

Dry slotting has helped erode some of this convection, but look
for additional development through tonight as the broad upper
trough and closed low shift farther east. Severe potential remains
marginal, and the main concern with any storms will be for some
hail as colder air aloft seeps farther into the region. Although
the damaging wind and tornado threats are very minimal, neither
can be completely ruled through this evening. Otherwise, look for
temperatures to fall back into the mid to upper 40s and lower 50s
overnight.

Rainfall coverage will remain quite high for Friday as the center
of the upper low passes just south of the region. The threat of
any thunderstorms will quickly fade through Friday morning as a
cold front shifts SE through the area in the wake of the upper
trough passage. Gusty NW winds behind the front will likely
warrant a lake wind advisory over parts of the area on Friday,
mainly over our western zones in NE texas and SE oklahoma. Low
temperatures behind the front will range from the upper 30s north
to lower and mid 40s farther south on Friday with even colder wind
chill values as NW winds will continue to be rather brisk through
Friday night.

19

Long term Saturday through Thursday
all precip should exit the area by sunrise Saturday morning as a
deep upper trough and surface low lift northeast into the ohio river
valley. Clouds will be slow to clear on Saturday, which should keep
temperatures below 60 degrees f during the daytime. Overnight lows
will generally remain above freezing except for some locations in
the terrain of southeast oklahoma. Warmer temperatures can be
expected for Sunday as a shortwave ridge moves overhead.

A persistence forecast will generally be the rule of thumb from
Sunday through Tuesday. Another upper trough will move out of the
southern rockies and into west texas by late Tuesday early
Wednesday. As this trough strengthens, another pacific front dryline
will move across the southern plains bringing a chance for showers
back to the area from early Wednesday through early Thursday. Medium
range models suggest this system will be very progressive, and there
is considerably uncertainty regarding deep layer moisture
availability. Therefore, only slight chance pops were mentioned for
the middle of next week.

Cn

Prev discussion issued 1252 pm cst Thu dec 13 2018
aviation...

for the 13 18z TAF period, a mix of cig vsby categories with
mainly ifr MVFR conditions observed through much of this period as
shwrs and embedded tstms continue to affect area terminals as an
upper level storm system shifts eastward overnight through Friday
morning. Conditions may even further deteriorate overnight while
intermittent periods of improvement cannot be ruled out in between
breaks in convection. Otherwise, winds will primarily be from the
e SE ahead of a cold front which will enter our region early
Friday morning with winds shifting to the N NW and becoming gusty
through the remainder of the day Friday following frontal passage.

19

Preliminary point temps pops
Shv 48 53 43 56 70 60 30 0
mlu 53 57 45 55 80 60 40 10
deq 50 54 39 57 100 90 40 10
txk 52 55 42 55 90 80 40 0
eld 52 57 44 54 90 70 50 10
tyr 46 50 39 57 70 70 20 0
ggg 46 52 40 56 70 60 30 0
lfk 45 51 41 58 30 50 20 0

Shv watches warnings advisories
Ar... None.

La... None.

Ok... None.

Tx... None.

19 09


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Shreveport, Shreveport Regional Airport, LA13 mi51 minE 65.00 miLight Rain Fog/Mist59°F59°F100%1005.1 hPa
Shreveport, Shreveport Downtown Airport, LA14 mi54 minE 710.00 miLight Rain59°F57°F96%1005.3 hPa
Marshall, TX17 mi52 minN 010.00 miOvercast58°F55°F92%1005.8 hPa
Barksdale Air Force Base, LA18 mi4.8 hrsSE 37.00 miOvercast57°F55°F94%1008.5 hPa

Wind History from SHV (wind in knots)
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Last 24hrS12S9S8SE8SE8SE7SE7S8SE9SE7SE8SE7SE8S8S8S10SE9S7S8E5NE5E8E7E6
1 day agoS6S7S7S7S8S4S5S4S7S7S4S6S8S6S6S11S8S10S11S13S11S11S11S10
2 days agoN5CalmSW3CalmW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm4S7S8S10SW11S8S12S10

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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Wind Forecast for Shreveport, LA (17,4,5,8)
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Ground Weather Radar Station Shreveport, LA
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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.