5/30 – Trey Tonnessen’s “Stalled Boundary” Thursday Evening Forecast

Meteorologist Trey Tonnessen

A weak frontal boundary was stalled across southern Mississippi this morning. Although there isn’t a huge temperature difference on either side of the boundary, there was a notable dewpoint gradient. Moisture convergence was enhance along this boundary this morning as easterly winds increased due to surface ridge oriented northeast of the area. This, combined with strong daytime heating initiated late morning and early afternoon convection. All this outflow driven activity that started this morning all around Lake Pontchartrain is on the rapid downward trend of intensity and generally moving offshore. A few storms have recent developed west of I-55 along a west to northwest moving outflow boundary. Once all this activity dissipates over the next few hours, should be done with the rain for the rest of the evening.