Marine Weather and Tides
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.
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|Sunrise 7:08AM||Sunset 5:15PM||Tuesday December 10, 2019 7:43 AM CST (13:43 UTC)||Moonrise 4:21PM||Moonset 5:28AM||Illumination 98%|
7 Day Forecast for Marine Location Near Longview, TXHourly EDIT Help
Area Discussion for - Shreveport, LA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS64 KSHV 101154 AAA AFDSHV
Area Forecast Discussion . UPDATED National Weather Service Shreveport LA 554 AM CST Tue Dec 10 2019
AVIATION. Look for cigs to deteriorate to IFR this morning as areas of -RA with embedded SHRA continue to develop and spread NE across the region ahead of a pair of upper troughs that will approach the region from the W. Some vsby reductions will be possible as well, generally ranging from 2-5SM. A brief mix of IP/SN may occur this morning across SE OK and the N sections of SW AR N of TXK as the precip diminishes over this area, but sfc temps will remain above freezing in the mid/upper 30s and thus no snow/ice accumulation is expected. The areas of RA are expected to gradually diminish from NW to SE this afternoon over the I-20 terminals and ELD, and by/shortly after 00Z Wednesday at LFK/MLU. Cigs should lift to MVFR across much of SW AR and extreme NE TX by early to mid afternoon, and across the ELD/N LA terminals by early to mid- evening, before eventually scattering out. However, these cigs may hold tough overnight across portions of Lower E TX/Ncntrl LA before clearing late. N winds 8-13kts today, with occasional higher gusts to 20kts, will diminish to 5kts or less by early to mid evening. /15/
PREV DISCUSSION. /issued 428 AM CST Tue Dec 10 2019/
SHORT TERM . /Today through Wednesday/
The morning sfc analysis and mosaic radar imagery indicates that the cold front has slipped S of the area this morning, extending from just N of a GLS, to N of LCH, to ACP, to S of a HEZ and SE of a JAN line as of 10Z. Cold advection continues to spill colder air S into the region this morning in its wake, although 10Z obs are not quite as cool as previously advertised, likely due to damming of this shallow air mass around the higher terrain of the Ouachitas evident of the steep gradient of isodrosotherms over extreme SE OK. Overrunning continues atop this shallow post- frontal air mass this morning, with the morning water vapor imagery depicting the upper trough just W of the Rio Grande S of ELP. The short term progs remain in good agreement with this trough eventually becoming absorbed this afternoon in the longwave trough currently diving S across the Cntrl Plains and Midwest, as it moves into the MS Valley and SE TX this evening. Thus, large scale forcing will continue ahead of these troughs over the region, with cold advection expected to continue through the afternoon before becoming neutral this evening. Max temps today will occur this morning at/shortly after sunrise especially over portions of Lower E TX/N LA before slowly falling throughout the day, although some recovery will be noted across SE OK/SW AR once the precip. ends and this cloud cover thins.
The 00Z NAM remains the cold biased model with regards to the extent of cooling of the air column, suggesting a possible changeover to a light wintry mix over portions of extreme NE TX/much of SW AR. However, the GFS has warmed the column a bit this morning compared to this time Monday, with the HRRR/ARW on board as well (but even a bit warmer than the GFS), suggesting a lower potential for any wintry mix across the Nrn zones before the precip ends by late morning. Given the damming occurring to our N, have scaled back the wintry mix mention to include only McCurtain County OK and the Nrn counties in SW AR, although should any occur, it will be brief and no impacts are expected as sfc temps should remain in the mid/upper 30s. The models are in agreement though with partial thicknesses in the H1000-850 layer warming after 18Z across SW AR, likely due to bndry lyr warming/recovery expected once the precip. ends. Thus, have dropped mention of the wintry mix for the afternoon across this area, with the post-frontal rains expected to diminish from NW to SE this afternoon once drier mid/upper level air ahead of the approaching troughs is entrained NE into the region. Did maintain chance/likely pops early this evening from Deep E TX across much of NCntrl LA, although this too will quickly end by mid to late evening prior to 06Z. While much of the post-frontal stratocu will erode this evening, some of this could hang tough overnight across portions of Deep E TX/Ncntrl LA. Should this occur, this would help to hold temps up to just above freezing late tonight, before mixing out by mid to late morning Wednesday.
Sfc ridging will build S into the region tonight/Wednesday from the Mid-South into N TX, maintaining below normal temps after a cold start to the morning as temps fall to near/below freezing. Have trended max temps near the NBM, which remains close to MOS. Should also see another night of near/subfreezing temps beneath this sfc ridge, with good radiational cooling expected although some thin cirrus may increase across the Nrn zones overnight.
LONG TERM . /Wednesday Night through Monday Night/
A brief period of zonal flow aloft will provide for tranquil weather Wednesday night with temperatures falling back to either side of the freezing mark as high pressure is anchored to the NE. On Thursday, a weak shortwave will pivot eastward from the southern Rockies across the Plains and eventually into our region by Thursday night through early Friday morning. Meanwhile, a weak surface low is progged to develop over the northern Gulf and slowly lift northward across the lower MS Valley during this timeframe. As a result, our far SE zones may be affected by some isolated showers late Thursday into Thursday night. Otherwise, the remainder of the region is expected to remain dry as the shortwave trof will quickly exit by later in the day on Friday. Temperatures will continue a gradual moderation back toward the 60s for highs on Friday over most areas and a bit warmer through the weekend ahead of another cold front.
This next cold front is expected to arrive Sunday night into Monday with showers increasing areawide. Moisture return will be greater ahead of this front and the parent upper level trough so confidence is increasing that widespread rainfall will occur with this system, especially during the day on Monday before the cold front clears the region later on Monday night. Cooler and more seasonal temperatures will follow heading into the mid week timeframe.
PRELIMINARY POINT TEMPS/POPS. SHV 47 31 54 34 / 100 10 0 0 MLU 49 30 54 33 / 100 40 0 10 DEQ 44 26 53 28 / 50 0 0 0 TXK 42 28 52 31 / 90 0 0 0 ELD 44 27 52 29 / 100 10 0 10 TYR 44 30 55 33 / 100 10 0 0 GGG 44 29 54 32 / 100 10 0 0 LFK 50 33 56 35 / 100 20 0 0
SHV WATCHES/WARNINGS/ADVISORIES. AR . None. LA . None. OK . None. TX . None.
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Longview - East Texas Regional Airport, TX||14 mi||51 min||N 13 G 18||10.00 mi||Light Rain||41°F||37°F||89%||1022 hPa|
|Gilmer, Fox Stephens Field - Gilmer Municipal Airport, TX||16 mi||49 min||NW 4||7.00 mi||Rain||37°F||36°F||96%||1023.4 hPa|
|Marshall, TX||21 mi||49 min||N 10||7.00 mi||Overcast||42°F||40°F||93%||1022.7 hPa|
Link to 5 minute data for KGGG
Wind History from GGG (wind in knots)
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|2 days ago||Calm||NE||E||Calm||SE||E||E||NE||E||E||SE||SE||SE||S||SE||SE||SE||SE||S||SE||S |
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Wind Forecast for Shreveport, LA (8,2,3,4)(on/off)  Help
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