Wednesday, July17, 2019 L-36.com


Marine Weather and Tides
Frierson, LA

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Sunrise 6:18AMSunset 8:23PM Wednesday July 17, 2019 3:18 AM CDT (08:18 UTC) Moonrise 8:12PMMoonset 5:53AM Illumination 100% Phase: Full Moon; Moon at 15 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 Frierson, LA
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location: 32.35, -93.63     debug


Area Discussion for - Shreveport, LA
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Fxus64 kshv 170426
afdshv
area forecast discussion
national weather service shreveport la
1126 pm cdt Tue jul 16 2019

Aviation
Extremely heavy rainfall which occurred mainly north
of i-30 over portions of SW ar last night into the mrng may
result in additional low clouds and fog overnight where local
dewpoints have remained solidly in the upper 70s due to
evaporating rainwater into the boundary layer. NE tx may see
brief periods of mainly MVFR CIGS due to continued southerly
breeze overnight. SW winds either side of 10 kts durg day Wed with
isold to sct cumulus clouds in aftn. Any possible daytime
convection should remain to the south and east of areal
terminals.VFR skc expected areawide after 18 00z. 07 .

Prev discussion issued 1002 pm cdt Tue jul 16 2019
update...

only change to the eve update, besides removing widely scattered
early evening convection across eastern portions of the area, is
to add patchy dense fog to portions of southwest arkansas, mainly
north of interstate 30, where the very heavy rain occurred late
last night and earlier today. 07 .

Prev discussion... Issued 408 pm cdt Tue jul 16 2019
short term... Tonight through Wednesday night
the center of post-tropical cyclone barry continues to move
northeast into the ohio river valley. The heavy rainfall that
developed last night and continued through much of this morning
over southwest arkansas has largely diminished and exited the
area, while more scattered convection continues across deep east
texas and central louisiana. This remaining activity should weaken
this evening and gradually end with the loss of diurnal
instability. Since the threat of additional heavy rainfall has
largely come to an end, the flash flood watch for portions of
southwest arkansas was cancelled.

A building upper ridge over the southeast CONUS and a surface high
over the northeast gulf of mexico will quickly assert themselves
beginning on Wednesday leading to a return of mostly dry weather
to the region. Very isolated convection could occur with the sea
breeze during peak daytime heating Wednesday, but coverage will be
very spotty.

Under the influence of strong ridging, the heat will also build.

The high amounts of low-level moisture should keep daytime high
temperatures in the mid 90s. On the flip side, this will also
result in heat index values very close to 105 degrees f and
flirting with heat advisory criteria for much of the area.

Humidity levels could be locally enhanced by evaporation in
portions of southwest arkansas on Wednesday due to the very wet
soils and severe flooding that occurred today. Thus, I would not
be surprised to see very isolated instances of heat index values
well above 105 degrees f in these areas. However, due to the
uncertainty and how borderline heat index values are expected to
be for the majority of the forecast area, a heat advisory was not
issued for Wednesday.

Cn
long term... Thursday through Tuesday
upper ridging over the SRN plains and lower ms valley will continue
to build E into the tn valley and SE CONUS Thursday through
Saturday, maintaining hot and dry conditions areawide, with any weak
seabreeze expected to remain to the S of S la. Have trended max
temps a bit above the blended guidance for this period of the
extended, although heat indices will range from 100-105 degrees each
day, and will be highly depending on the extent of mixing observed
each day. Those areas of SW ar which observed excessive rainfall
amounts of 6-10+ inches earlier this morning, as well as portions of
ncntrl la, will have to be watched closely should the mixing of
dewpoints not be sufficient enough to keep heat indices below the
105 degree advisory criteria. The medium range progs continue to
indicate that a portion of barry's remnants will be pinched off from
its original trough axis along the E coast Friday morning, with the
upper ridging retrograding this piece of energy back W across the se
conus Friday Saturday and into the lower ms valley Sunday (much like
how it began a week and a half ago, except farther S into the nrn
gulf). Thus, isolated convection will be possible Saturday afternoon
over the SRN and ERN zones, with the potential for convection
spreading farther W across N la Sunday. Have expanded low
chance slight chance pops farther W Sunday, with much of the
convection remaining diurnally driven, diminishing by early evening
with the loss of heating.

This inverted trough is progged to shift farther W into SE tx N la
Monday, which should focus more in the way of sct convection over
much of the region through Tuesday as this weak trough lingers along
the ERN periphery of the upper ridge once it retreats W back into
the plains. While the ECMWF maintains stronger ridging aloft early
next week, the GFS remains a bit weaker with the ridge, allowing for
a longwave trough to dig SE across the oh valley SE conus. This may
allow for a weak sfc front to mix S early next week as well, which
may also help focus sct convection through the end of the extended
period as well. For now, have maintained low chance pops until
better timing extent of convection is seen in the medium range
progs.

15

Preliminary point temps pops
Shv 77 95 75 94 10 10 0 0
mlu 74 93 75 93 10 10 0 10
deq 74 94 74 93 0 0 0 0
txk 76 94 75 93 0 0 0 0
eld 76 93 75 93 10 10 0 0
tyr 76 95 76 94 0 0 0 0
ggg 76 95 76 94 0 0 0 0
lfk 77 95 75 94 0 20 0 10

Shv watches warnings advisories
Ar... None.

La... None.

Ok... None.

Tx... None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Barksdale Air Force Base, LA11 mi23 minSSW 710.00 miFair80°F75°F87%1016.3 hPa
Shreveport, Shreveport Regional Airport, LA13 mi23 minSSW 810.00 miFair79°F75°F88%1015.9 hPa
Shreveport, Shreveport Downtown Airport, LA14 mi26 minS 910.00 miFair81°F75°F82%1016 hPa

Wind History from BAD (wind in knots)
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Last 24hrS11S8S12S9SW10SW10
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S9SW6SW9SW9S9S9S8S9--S8--SW7
1 day agoW10W6W6W6SW6SW6SW8SW7SW8W8W9W7W6W7SW7SW6S8S10S14S7S7S9S9S9
2 days agoE6NE3E4E5E3E5E5E6E4NE3N3N4W5W5W4W5SW5SW6SW5SW5SW4SW5SW5SW5

Tide / Current Tables for
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Weather Map and Satellite Images
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GOES Local Image of Midwest    EDIT
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Wind Forecast for Shreveport, LA (4,6,7,8)
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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.