Author Archives: Jon Wahl

As the upper level low departs and as a drastic change in air mass occurs overnight, a slight gradient wind event is occurring.  The strongest pressure gradient is farther north; however, current sustained winds measured at Mesonet sites around Southern … Continue reading →

The cut-off system has been picked up by the jet-stream, and a jet streak will help dig the a trough over Central Canada down into The Mid South bringing high temperatures down into the 60s for the weekend with Saturday … Continue reading →

The first full week of Fall 2011 looks mostly quiet with the temperature fluctuations along with the cut-off low being the main stories. Yesterday, the weather over The Mid South was dominated by rather prolific dry slotting in the cut-off … Continue reading →

With the current jet stream pattern the way it is and the expected evolution of the jet stream as projected by the NAM and GFS, cooler temperatures can be expected throughout the week, with a more winter like feel to … Continue reading →

With a low pressure system sitting over Missouri and Kansas and moving southeast, the Mid-South is going to see some isolated to scattered showers, today. The main reasons for the lack of rain with this system are mainly the lack … Continue reading →

The latest 250mb Velocity plots show a very clear split flow in the jet stream as of late, with the Mid-South caught in the middle of it, which usually leaves the area high and dry, and that is not the … Continue reading →

The passage of the cold front early this morning has left the area with much cooler and drier air in place, but the heat shall return for the weekend and well into next week.  The main reason for this is … Continue reading →

The 17Z GOES Skew-T sounding shows much greater CAPE than earlier, just shy of 4000, as well as a lifted index of -7.  The SWEAT index was also close to 300 as well in this sounding.  At the same time, … Continue reading →

A low centered about over Lake Michigan is bringing Bowling Green area much of the Mid-South some rain and thundershowers this morning.  Indications from the SPC, yesterday, showed a Slight Risk for severe weather, but in accordance with some of … Continue reading →

Boundary related to the low pressure center along the Ohio River will push south, providing lift to create some nice thunderstorms today.