261 FXUS63 KGRR 250706 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 306 AM EDT Wed Mar 25 2026 .KEY MESSAGES... - Severe Weather Potential for Thursday Afternoon && .DISCUSSION... Issued at 305 AM EDT Wed Mar 25 2026 - Severe Weather Potential for Thursday Afternoon Only significant weather of note this week will be a chance for strong to severe storms across the southern half of the forecast area on Thursday afternoon. Model guidance continues to show the potential for isolated severe storms with large hail and damaging winds/isolated tornadoes south of I-96 Thursday afternoon, which congeals into a solid line of storms bringing a more widespread severe threat as it sinks south into northern Indiana and Ohio. Deep layer shear of 50 knots and 0 to 1 km helicity over 200 m2/s2 is progged to be across the southern forecast area Thursday afternoon but instability may be limited, especially if morning clouds and showers persist into the afternoon. The 00Z GFS model soundings indicate the cold front will be clearing JXN and AZO by 4 pm with the potential for elevated strong to severe storms persisting above the stable layer until early evening. Strong push of colder air for later Thursday evening could see post frontal precip change to snow before ending. && .AVIATION /06Z TAFS THROUGH 06Z THURSDAY/... Issued at 233 AM EDT Wed Mar 25 2026 VFR conditions will continue through Wednesday. South winds around 10 knots through the afternoon. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...None. MARINE...None. && $$ DISCUSSION...Ostuno AVIATION...Ostuno

NWS GRR Office Area Forecast Discussion


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