718 FXUS63 KGRR 100736 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 336 AM EDT Mon Aug 10 2026 .KEY MESSAGES... - Numerous strong storms likely through daybreak this morning - Small chances of mainly diurnal showers/storms into Thursday - Better chances of rain return next weekend && .DISCUSSION... Issued at 336 AM EDT Mon Aug 10 2026 - Numerous strong storms likely through daybreak this morning We are seeing the effects of the secondary low level jet over the area early this morning in the form of numerous showers and storms over the southern 2/3rds of the forecast area. Some of the storms have had some good updrafts/cores associated with them. Forecast soundings show that there is an inversion from around 925mb and lower, which will limit the ability for stronger winds to reach the ground. Some wind was present in storms a couple of hours ago, so they will be possible. The bigger threat looks to be the heavy rain potential. Precipitable water values just short of 2.0 inches are leading to some very heavy downpours. Some of the storms earlier sat over one area, and produced over 2 inches in just over an hour in SW Kent County. The expectation is that the storms over the area this morning will push out toward 12z or so. This lines up nicely with the low level jet pushing east by that time, with no additional forcing moving in. The front is expected to push far enough south then behind this morning`s storms, that as the next low level jet ramps up this evening, everything should stay south of the forecast area. We can`t rule out a pop up shower/storm this afternoon with plenty of moisture remaining. The coverage looks to be quite low (073. MARINE...None. && $$ DISCUSSION...NJJ AVIATION...NJJ MARINE...NJJ

NWS GRR Office Area Forecast Discussion