Marginal severe risk for northern lower Michigan this afternoon

I apologize for my lack of posts over the last 36 hours or so - I've been very busy with other things, and it's been fairly quiet weather-wise.

The SPC has issued a marginal risk designation for northern lower Michigan regarding storms this afternoon.  This is an upgrade based on both observations and model data, so it should be taken a bit more seriously than the average outlook.  The outlook's wording reads as follows:

...UPPER GREAT LAKES THIS AFTERNOON/EVENING...

   THE 12Z GRB AND APX SOUNDINGS SAMPLED THE PRESENCE OF STEEP
   MID-LEVEL LAPSE RATES AND MODESTLY STRONG MID- TO UPPER-LEVEL NNWLY
   WINDS WHICH WILL CONTRIBUTE TO AN INCREASE IN BOTH INSTABILITY AND
   VERTICAL SHEAR ACROSS THE REGION THROUGH THE PEAK OF THE DIURNAL
   HEATING CYCLE.  WHILE SPECIFIC DETAILS REGARDING CONVECTIVE
   EVOLUTION REMAIN UNCLEAR...IT APPEARS THAT THE PRESENCE OF THE WEAK
   SURFACE FRONT...DEVELOPING LAKE-BREEZE CIRCULATIONS AND WEAK
   PERTURBATIONS ALOFT WILL ACT IN CONCERT TO FOSTER ISOLATED STRONG TO
   MARGINALLY SEVERE STORMS WITH A RISK FOR HAIL AND LOCALLY DAMAGING
   WINDS THIS AFTERNOON INTO EVENING. 

Suffice to say, widespread thunderstorm activity is expected throughout northern, central, and south eastern lower Michigan this afternoon.  The severity of these storms remains in question, as conditions may hover right around where they need to be to drive some bigger storms.  I'm a bit concerned about the Thumb Area in terms of conditions, too, as the lakes are going to serve to enhance any thunderstorm activity that develops this afternoon.