Subj : MESO: Nws Weather Prediction Center College Park Md To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Sat Aug 23 2025 18:50:33 AWUS01 KWNH 231850 FFGMPD SCZ000-FLZ000-GAZ000-240048- Mesoscale Precipitation Discussion 0984 NWS Weather Prediction Center College Park MD 250 PM EDT Sat Aug 23 2025 Areas affected...southern/southeastern Georgia, southern/coastal South Carolina, northern Florida Concerning...Heavy rainfall...Flash flooding possible Valid 231848Z - 240048Z Summary...Scattered, slow-moving storms will continue to produce areas of 1-2.5 inch/hr rain rates at times. Flash flooding is possible - especially where heavy rain falls on sensitive/urbanized ground conditions. Discussion...Flash flood potential continues across much of southern Georgia and coastal areas of Georgia and South Carolina. Most of the deep convection was focused along and south of a weak differential heating and zone currently across central Georgia from just south of Atlanta through Macon to just north of Savannah. Along and south of this confluence zone, pockets of heating with an abundantly moist airmass (2+ inch PW values) has contributed to scattered development of deep convection. Weak steering flow aloft has allowed for slow and at times erratic storm motions along with several mergers, enabling rain rates to exceed 2 inches/hr at times in a few spots. Some of the heavy rain was falling on areas experiencing local inundation/poor drainage due to onshore flow along coastal areas, resulting in several instances of flooding impacts. In other areas, rainfall was occurring atop spots of 3-9 inch rainfall totals over the past 24 hours, resulting in wet soils and increased potential for runoff. Ongoing convective trends will continue through at least 00Z/8p EDT tonight, with locally sensitive areas experiencing a continued threat of heavy rainfall. Several instances of flash flooding are possible, and local enhancement of flash flood risk from onshore flow near coastal areas should continue. Modest destabilization has also occurred along South Carolina coastal areas near Charleston, and although a lull in deep convective activity has been observed over the past 1-2 hours, redevelopment of rainfall (and 1 inch/hr rates) may occur through the evening, renewing the flash flood risk in that area. Cook=20 ....Please see https://urldefense.com/v3/__http://www.wpc.ncep.noaa.gov__;!!= DZ3fjg!5L-IkteKJH6e1ootPivcfjqIomPwV-vQ-l3ndi3zZ3msMBGXcVhgEgfOSrp73PGeFUD0= PnuOhvSz8UytAWnDiq-wlL0$ for graphic product... ATTN...WFO...CHS...FFC...JAX...TAE... ATTN...RFC...ALR...NWC... LAT...LON 33227991 33137938 31438111 30298167 30118367=20 30148500 30808506 31298437 31998462 32748465=20 32768322 32788091=20 =3D =3D =3D To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM. --- SBBSecho 3.28-Linux * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105) .