The storm that we have been following all week, which originated off the coast of Japan, will arrive in North Texas Tuesday with showers and the potential for severe weather.
A rapidly-developing squall line of thunderstorms will sweep over the area, with at least 70 percent of North Texas receiving rain. The storm should arrive in the metroplex late in the morning and continue into early afternoon.
The atmosphere will be moderately unstable on Tuesday and capable of supporting severe storms with hail and straight-line winds from the metroplex and locations east. The farther east, the more intense the storms will be.
Although some of the storms will be strong-to-possibly-severe in North Texas, they will be moving much too fast to produce a multi-inch rain event for us.
We will need to watch for any isolated storms forming ahead of the squall line, since there will be enough spin in the atmosphere to support rotating updrafts in those storms -- particularly east of a McKinney-Dallas-Waco line Tuesday afternoon. This is when the upper-level disturbance will transition from a zero tilt to a negative tilt, which will increase the severe potential for much of East Texas.