Southern Indiana Weather Spotter's Reference
Current Mesoscale Discussions for the USA
Checks for Severe Potential, Heavy Rain, Heavy Snow, and Freezing Rain
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MESOSCALE DISCUSSION 0787 NWS Storm Prediction Center Norman OK 1244 PM CDT Tue May 19 2026 AREAS AFFECTED...Northern Indiana/Ohio into Southeastern Michigan CONCERNING...Severe potential...Watch likely VALID 191744Z - 191915Z PROBABILITY OF WATCH ISSUANCE...80 percent SUMMARY...Thunderstorms capable of DAMAGING WIND GUSTS are anticipated this afternoon across portions of northern Indiana/Ohio into southeastern Michigan. A severe thunderstorm watch is likely. DISCUSSION...Current expectations are that thunderstorm coverage will continue to increase this afternoon in an environment characterized by steep low-level lapse rates, strong buoyancy, and modest ....... more

MESOSCALE DISCUSSION 0786 NWS Storm Prediction Center Norman OK 1231 PM CDT Tue May 19 2026 AREAS AFFECTED...Lower Ohio River Valley CONCERNING...Severe potential...Watch possible VALID 191731Z - 191930Z PROBABILITY OF WATCH ISSUANCE...40 percent SUMMARY...Thunderstorm coverage is expected to increase this afternoon across much of the Ohio River Valley as daytime heating brings the boundary layer to convective temperatures. These storms will primarily be capable of damaging straight-line winds and hail. DISCUSSION...Thunderstorms have begun to develop within moist and uncapped boundary layers where MLCAPE exceeds 2500 J/kg. Convective coverage is expected to ....... more