####018002216#### AWUS01 KWNH 062110 FFGMPD FLZ000-ALZ000-MSZ000-LAZ000-070309- Mesoscale Precipitation Discussion 0342 NWS Weather Prediction Center College Park MD 509 PM EDT Sat Jun 06 2026 Areas affected...southern Mississippi, southeastern Louisiana, and far southern Alabama Concerning...Heavy rainfall...Flash flooding likely Valid 062109Z - 070309Z Summary...Flash flood potential continues as a weak mid/upper disturbance continues to force deep convection over the discussion area. Discussion...Flash flood potential continues. Deep convection remains slow-moving (with weak steering flow aloft per mesoanalyses) but focused along a couple of low-level convergence axes (evident per surface obs), 1) from near Natchez, MS to Hammond/Slidell, LA and 2) along a small bowing convective segment over Harrison County, MS north of Gulfport. The storms were ingesting extremely moist/buoyant air in the pre-convective airmass (2+ inch PW values, 1500 J/kg MLCAPE along and west of the aforementioned convergence zones), while subtle ascent supported by the mid-level vort max over the region further supports deep, slow-moving convection. Rain rates above 2 inch/hr have been common especially from Slidell/St. Tammany eastward into the southern MS coastal counties, and that's where impacts have been reported so far today. These trends are expected to continue for at least another 2-4 hours or so. Models suggest that most convective will be diurnally driven, with some weakening expected after sunset, though locally heavy rainfall cannot be ruled out even after 02Z/9p central. High rain rates (perhaps reaching 2-3.5 inch/hr) may occur where training is most pronounced. These rates will cause continued flash flood potential especially in areas 1) already experiencing impacts, 2) that have soaked soils from abundant prior rainfall, or 3) fall in urbanized areas. Cook ...Please see www.wpc.ncep.noaa.gov for graphic product... ATTN...WFO...JAN...LCH...LIX...MOB... ATTN...RFC...ALR...ORN...NWC... LAT...LON 31969095 31878874 30848752 29678801 29078930 29269102 30259184 31189156 ####018001517#### PENA01 KWNH 061200 @UHPISF000CNê MPDSUM@V2.0@0101700060@12060626@@0NMCGPHMPD `P@!' `' ` @ ê¾& êBñ7)p&¬PNAM02@@6âo€‚„„……††‡†Š‡†~…~†}„}„|ƒ}‚{z€zÿzÿzþ{ý{ý{ü|û|û|û~û~ú~ùúúúûúûûüýýÿÿ@@âo€@@âo€@@4˜˜üû~ûúõûûúüûýÿÿÿ€ÿ€€‚ƒƒ„„…†††‹„~„|„|ƒzƒy|{zzzz€kÿyþzý|ý|û}@@˜˜€@@˜˜€@@4?Hƒƒ„…†………††††……‡‡†~…~„}ƒ}ƒ{‚{{þ{þ|þ|ü|ü|û|ú}ú~û~ûúùùúéøùúüýÿ‚‚„ƒ@@?H€@@?H€@@0ê…„†††”†††‘……‡†}„}ƒ||€{þ{ü|ý}ü~û~û~ú~úñúûúõúôúöüúý€ƒƒ„…@@ê…€@@ê…€@@4§.ü|û|ü{ü{ý}û}ü}ü~ýüþþÿþ€ÿ€ €‚‚„ƒ„……„„„„ƒ……„……„~ƒ|z‚z€mÿzý{ü}û~ú}ú~ú}@@§.€@@§.€@@/.Aûýüûðúúûüýÿ€ ‚‚‚‚ƒ‚ƒ„„š„„„„~„|„{ƒ{‚{‚z‚{€zÿ{þ{þ|ý{ý|ý{ü{û}ý~@@.A€@@.A€@@ Œ€0337 @@³j€0338 @@ê…€0339 @@…e€0340 @@Žü€0341 @@놀0342 @@d&€MESOSCALE DISCUSSION SUMMARY GRAPHIC @@d&þ€ OF ALL VALID MESOSCALE DISCUSSIONS AT @@d&ü€ TIME OF PRODUCT CREATION:@@d&ú€ ISSUED 06/06/2026 2110Z @@ d™€NOAA/NWS/NCEP@@d™þ€ WEATHER PREDICTION CENTER @@d™ü€ FOR COLOR VERSION SEE: @@d™ú€ WWW.WPC.NCEP.NOAA.GOV @