Marine Weather and Tides
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.
|Sunrise 6:47AM||Sunset 6:10PM||Thursday February 25, 2021 3:32 PM CST (21:32 UTC)||Moonrise 4:32PM||Moonset 5:59AM||Illumination 99%|
7 Day Forecast for Marine Location Near Texarkana, TXHourly EDIT Help
Area Discussion for - Shreveport, LA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS64 KSHV 252120 AFDSHV
Area Forecast Discussion National Weather Service Shreveport LA 320 PM CST Thu Feb 25 2021
SHORT TERM. /Tonight through Friday Night/
The weak cold front has become stationary across the extreme southern sections of our CWA, generally along a a line from Lufkin Texas to Jena Louisiana. Noticeably cooler conditions have moved into the region in wake of the front, with temps running 10 to 15 degrees below this same time on yesterday. Extensive cloud cover today has also aided in lower temperatures. As expected, starting to see returns on radar as isentropic ascent starts to ramp up. Look for this trend to continue through the evening with steady uptick in upper forcing from the west, as an upper trough moves out of the Rockies into the Southern Plains.
As the trough to our west moves our way tonight, look for moderate to heavy rainfall to develop across our region during the overnight hours, especially in the vicinity of an 850mb theta-e axis near and north of the I-20 Corridor. There is also a marginal severe weather threat. With elevated instability across the region along with effective bulk shear near 50 kts, and mid-level lapse rates approach 8 C/km, stronger storms could produce hail above severe limits.
The stalled sfc boundary will return back to the north as a warm front on Friday, bringing southerly winds and warm air advection back into the region. The region will remain in southwest flow aloft, and weak impulses will continue to move across the region. Although large scale forcing will be diminished as the upper trough pushes east of the region, rain chances will remain across the region near the positioning of the stalled sfc boundary. The best chances appear to be along a corridor from LFK to SHV, to near MLU. Just how far north this boundary returns will determine fcst temps on Friday with 70s likely south of the boundary and 50s north of the boundary. /20/
LONG TERM. LONG TERM . /Saturday through Thursday/
SWrly flow aloft will resume Saturday ahead of a longwave trough that will begin to develop during the afternoon over the Great Basin and Cntrl Rockies, before amplifying Saturday night/Sunday morning in the Desert SW. At the sfc, a stationary bndry lingering over Lower E TX into N LA will begin to lift N as a warm front, with weak convergence along the retreating front and PVA in the SWrly flow aloft contributing to sct convection development near and N of the front. Have increased pops to likely by Saturday afternoon along/N of the I-30 corridor, with a wide range in temps expected from N to S with some breaks possible in the strong warm advection regime S of the front contributing to temps climbing into the mid and upper 70s. This front should mix N of the region Saturday evening before stalling, as a cold front begins to shift SE through OK and into the Ozarks. Thus, moisture pooling will help to enhance continued convection development across SE OK/SW AR Saturday night, before the shallow frontal bndry drifts SE into NE TX/SW AR Sunday. Convection will increase along/ahead of the front Sunday as perturbations traverse the SW flow ahead of the longwave trough, with pops increased to categorical for much of the region ahead of the front.
This bndry should gradually shift S through the remainder of the area Sunday night, although elevated post-frontal isentropic forcing will continue through Tuesday morning before the parent trough over the Desert SW quickly ejects NE through the Red River Valley and into the Ozarks Tuesday. Dry slotting ahead of the trough should taper the convection from W to E Tuesday, although the shallow post- frontal air mass does not look to be deep enough to scour the cigs completely through midweek. Some insolation though should result in temps returning back to near or above normal through the end of the long term period.
PREV DISCUSSION. /issued 1229 PM CST Thu Feb 25 2021/
Frontal boundary has cleared the TAF sites. However, low VFR to MVFR conditions will continue to overspread the terminals today, as low ceilings move across the region. Some scattered showers have started to develop across our extreme southern airspace near LFK, with precipitation expected to increase in coverage as we transition into the evening and especially the overnight hours. Should see ceilings gradually come down to IFR/LIFR ceilings overnight into tomorrow with the rainfall. Look for NNE to ENE winds sustained near 10kts for most of the period. /20/
PRELIMINARY POINT TEMPS/POPS. SHV 50 62 54 73 / 100 80 60 50 MLU 51 66 58 75 / 80 60 50 40 DEQ 45 56 45 64 / 100 30 20 70 TXK 47 56 49 65 / 100 70 50 60 ELD 46 57 50 69 / 100 80 70 50 TYR 48 60 52 73 / 100 70 30 50 GGG 48 61 52 73 / 100 80 50 50 LFK 59 73 58 77 / 80 50 40 30
SHV WATCHES/WARNINGS/ADVISORIES. AR . None. LA . None. OK . None. TX . None.
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|Texarkana, Texarkana Regional-Webb Field, AR||4 mi||40 min||NE 12||10.00 mi||Overcast||60°F||41°F||50%||1020.8 hPa|
Link to 5 minute data for KTXK
Wind History from TXK (wind in knots)
|1 day ago||SW|
|2 days ago||S||W||SW||Calm||Calm||S||S||S||SW||SW||SW||SW||SW||SW||NE||Calm||S||SW||SW||SW||SW||S||S|
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