Flash Flood Guidance
Issued by NWS
Issued by NWS
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761 AWUS01 KWNH 112237 FFGMPD SCZ000-GAZ000-120135- Mesoscale Precipitation Discussion 0651 NWS Weather Prediction Center College Park MD 636 PM EDT Fri Jul 11 2025 Areas affected...GA/SC border into central SC Concerning...Heavy rainfall...Flash flooding possible Valid 112235Z - 120135Z Summary...Thunderstorms are developing along a more linear structure and may be about to train near and ahead of an outflow boundary intersection. Hourly amounts to 3" with local amounts to 5" are possible. Discussion...There has been a resurgence in convective activity from far northeast GA into central SC within a moist and unstable environment near an imminent outflow boundary collision. Precipitable water values remain 2". ML CAPE is 3000+ J/kg. Effective bulk shear is 20-25 kts. The guidance indicates that the activity with heavy rainfall could hold on for another few hours. Hourly amounts to 3" and local totals to 5" remain possible where convection is quasi-stationary and/or trains. Roth ...Please see www.wpc.ncep.noaa.gov for graphic product... ATTN...WFO...CAE...CHS...FFC...GSP... ATTN...RFC...ALR...NWC... LAT...LON 34688347 34558211 33287975 32468033 32218125