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Area Forecast Discussion
Issued by NWS Shreveport, LA
Issued by NWS Shreveport, LA
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951 FXUS64 KSHV 201543 AFDSHV Area Forecast Discussion National Weather Service Shreveport LA 1043 AM CDT Sat Jul 20 2024 ...New UPDATE... .UPDATE... Issued at 1042 AM CDT Sat Jul 20 2024 No update is needed to the overnight forecast package at this time. /44/ && .SHORT TERM... (Saturday through Sunday) Issued at 321 AM CDT Sat Jul 20 2024 There is little in the way of significant change to speak of in the short or long term forecasts, i.e. if you`ve been keeping up with our discussions in recent days, this one will be par for the course. For full details, read on... The synoptic pattern which looks to define the majority of this forecast period can be succinctly summarized as follows: a large area of ridging will dominate the western third of the CONUS, with its axis positioned over the western Rockies and intermountain West, while a trough of varying depth extends from the Great Lakes across the Midwest and occasionally down into the Plains. It is accurate to say that the above captures the days ahead of us in full, and this forecast period may be simply defined as unsettled. Today, however, may actually see a short-lived respite from the trough-induced activity. For the past few days, a pseudo-stationary frontal boundary has been producing areas of showers and storms across the southeastern corner of the ArkLaTex. The boundary has drifted just enough south and east that PoPs are largely negligible except for perhaps a stray shower or storm in our central Louisiana parishes. It would be something of a stretch to describe today`s conditions as a relief, however, as we trade rain for heat. Highs will have the opportunity to climb into the lower 90s, and while dew points will be slightly lower than recently, they will still be just barely below the threshold of discomfort, with little in the way of any cooling breezes, and a warm and fairly muggy afternoon is in store nonetheless. Lows will drop off into the upper 60s north and lower 70s south tonight, before rebounding into the upper 80s to lower 90s once again Sunday afternoon. Sunday will see more widespread rain return to the ArkLaTex, though precisely where and when is still subject to change. At this point, it looks like early Sunday, the pseudo-stationary boundary will lift north enough to bring storms to our southeast, while a new disturbance advances from the northwest, bringing showers and storms north of I-30. By Sunday afternoon, these areas of activity look to converge, beginning what looks like a lengthy stretch of near- areawide precip chances. /26/ && .LONG TERM... (Sunday Night through Saturday) Issued at 321 AM CDT Sat Jul 20 2024 As suggested above, once Sunday`s rainfall begins in earnest, it does not look to subside much as we head into the new work week. Areawide rainfall chances will thereafter continue almost to the end of this long term forecast period, oscillating in coverage and confidence as further disturbances ride the flow aloft. The latest long range model guidance indicates particular confidence in widespread rainfall Monday and Tuesday afternoon. As the upper level ridging aloft begins to reassert itself and build somewhat eastward, the upper level pattern will resemble the northwest flow so characteristic of springtime in the ArkLaTex. Fortunately, as of this writing, the highest SWO category including the ArkLaTex is General Thunder. The ERO, meanwhile, indicates the possibility of heavy rainfall resulting in areas of flash flooding, and this eventuality will be monitored closely through the coming days. High temperatures, will be returning to mid to upper 80s Monday, where they will remain for most of the week. Lows will remain fairly steady in the upper 60s to lower 70s. The end of the week may see a breakdown of this established upper level pattern, with the eastward reaching influence of the upper level ridge bringing about decreasing rainfall chances and increasing temperatures, with a return of upper 80s and lower 90s by Friday and leading into next weekend. /26/ && .AVIATION... (12Z TAFS) Issued at 634 AM CDT Sat Jul 20 2024 VFR conditions will continue through the 20/12Z TAF period. Scattered areas of cu have developed this morning across portions of SE AR/NCntrl LA and Deep E TX, which should persist through the morning, with additional cu development expected by mid/late morning through the afternoon, before diminishing by/shortly after 00Z. While SKC should prevail at least through this evening, areas of cirrus should increase late tonight from the W. NNE winds around 5kts today will become Lt/Vrb after 00Z. /15/ && .PRELIMINARY POINT TEMPS/POPS... SHV 93 73 93 75 / 0 0 20 30 MLU 91 70 92 72 / 10 0 30 20 DEQ 89 67 88 68 / 0 10 20 40 TXK 91 70 92 72 / 0 0 20 30 ELD 89 67 93 70 / 0 0 20 20 TYR 92 72 92 73 / 0 0 20 30 GGG 91 71 91 72 / 0 0 20 30 LFK 92 72 92 73 / 10 0 40 20 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...None. LA...None. OK...None. TX...None. && $$ SHORT TERM...44 LONG TERM....44 AVIATION...20