Remaining scattered showers this morning will be working northeast
of the terminals between 12z-14z. In the wake of this activity, MVFR
cigs begin to shift over the area as warm front encroaches and winds
veer to the southeast and south with time into early afternoon.
Scattered to numerous thunderstorms are still expected along a cold
front from mid to late afternoon with the most likely window holding
in the 19z-21z time frame with some stray showers or storms perhaps
developing a few hours before the main line crosses the area. Heavy
rain and gusty winds can be expected. Winds switch to the southwest
to west after the cold front passes with MVFR cigs predominant in
this flow wrapping around low pressure to the north.
For DTW/D21 Convection...A north to south oriented line of
thunderstorms is anticipated to develop and move through between 19Z
and 21Z. Expect reduced visibility from heavy rainfall and strong
winds from stronger thunderstorm. The environment will bring some
potential for tornadic thunderstorms. Will need to monitor potential
development of discrete cells a few hours prior to 19Z ahead of the
main line and adjustments in timing of the main line remains
possible with upcoming TAFs.