Area Forecast Discussion
Issued by NWS Lake Charles, LA
Issued by NWS Lake Charles, LA
787 FXUS64 KLCH 211119 AFDLCH Area Forecast Discussion National Weather Service Lake Charles LA 619 AM CDT Mon Sep 21 2026 ...New AVIATION... .KEY MESSAGES... - Precipitation chances will increase but remain isolated to scattered through the next two days as a high pressure remains centered nearly overhead. - A weak "frontal" boundary will bring some drier air back into the region Wednesday through late next week. && .DISCUSSION... (Today through Sunday) Issued at 1217 AM CDT Mon Sep 21 2026 Aloft, high pressure is centered almost directly overhead tonight, with an area of surface high pressure also situated over the Gulf Coast. This will allow for light and variable to calm winds overnight. As moisture continues to return to the area, dewpoints will gradually increase, not just along the coast, but further inland as well. Temperatures will be warmer through Tuesday, with highs in the mid to upper 90s and some low triple digits possible. Despite the rise in temperatures and dewpoints, values will remain below Heat Advisory criteria. With moisture continuing to increase, PoPs have also increased, particularly across south CenLA where 30 to 50 percent chances are expected later today. The upper ridge will still limit coverage overall, but it will not completely shut out diurnally driven and seabreeze activity elsewhere or along the eastern side of the CWA. The upper ridge will begin to weaken as a shortwave moves across the Northern Plains. In addition, a weak frontal boundary is forecast to move southward Tuesday before slowing, then progressing through the area Wednesday. With antecedent conditions a bit drier, showers and storms should remain limited, though PoPs around 20 to 30 percent are expected Tuesday. Northerly winds are forecast to prevail from Tuesday through the end of the week, ushering in drier air. Over the weekend, winds will become easterly then southerly once again. Temperatures will fall into the low to mid 90s at the end of the week, and despite a slight moisture return over the weekend, temperatures will only rise a few degrees from there. && .AVIATION... (12Z TAFS) Issued at 616 AM CDT Mon Sep 21 2026 VFR conditions with light and variable winds currently prevail at all sites, though brief periods of MVFR visibility in fog can`t be ruled out through sunrise after which all fog will dissipate. Isolated to scattered convection will develop during the day, most likely for LFT/ARA, though would not completely rule out a shower/storm near other terminals. Convection should dissipate with sunset. Some patchy fog/mist may develop again early Wednesday morning (after 22/08z), though forecast confidence is too low to explicitly mention this threat in TAFs with this package. 64/Silas && .MARINE... Issued at 1217 AM CDT Mon Sep 21 2026 Light east to southeast winds and low seas will exist across the coastal waters through Tuesday. A weak frontal boundary may move into the coastal waters mid to late work week, with offshore winds increasing into SCEC criteria and increasing rain chances. && .FIRE WEATHER... Issued at 1217 AM CDT Mon Sep 21 2026 A moderately moist airmass will remain in place through Tuesday as the flow remains light and southerly, however a weak cold front will push through the area Tuesday night or early Wednesday. Minimum relative humidities may fall into the upper 20s to mid 30s across interior areas by Thursday. && .LCH WATCHES/WARNINGS/ADVISORIES... LA...None. TX...None. GM...None. && $$ PUBLIC/FIRE/MARINE...87 AVIATION...64