Mesoscale Discussion 0075 NWS Storm Prediction Center Norman OK 1146 AM CST Sat Feb 08 2025 Areas affected...Northeast Indiana into far southern Michigan and northern Ohio Concerning...Freezing rain Valid 081746Z - 082245Z SUMMARY...Freezing rain will gradually become more widespread across north/northeast Indiana and northern Ohio through the mid to late afternoon hours. Freezing rain rates up to 0.03 in/hour appear possible. DISCUSSION...Regional radar imagery shows a swath of stratiform precipitation (with embedded convective elements) becoming established across north-central IN as isentropic ascent increases within the warm conveyor belt of an intensifying mid-level low. This trend is expected to continue through the afternoon hours as warm/moist advection increases amid strengthening 925-700 mb winds. This mid-level warm advection will reinforce a weak warm-nose aloft, and should promote mainly liquid hydrometeors near the surface. Although surface temperatures are currently near freezing across northern IN/OH, dewpoints in the teens to mid 20s suggest that wet-bulb cooling to below freezing is likely after the initial onset of precipitation. This trend is already being observed at a few locations across northern IN with some ASOS/AWOS and mPING reports of freezing rain noted over the past 30-60 minutes. Surface temperatures from the 12 UTC HREF members appear to be running 1-3 F too cold compared to 17 UTC observations, which suggests that freezing rainfall estimates from these members/HREF probabilities may be too bullish. However, more recent deterministic solutions (HRRR/RAP) have captured surface temperature trends well and depict freezing rain rates of around 0.03 in/hour. These solutions also suggest that freezing rain potential may be greatest across northwest to north-central OH through late afternoon with accumulations up to 0.1 - 0.25 inch possible.