nWo

The sun is already starting to come back out here in Richmond.

Everyone should be weather-aware later today into early Thursday morning. Have more than one way to get information for your area. This will be our weather motto: FOREWARNED is FOREARMED. (If you know about a problem or situation in advance, you will be able to deal with it when you need to.)

One thing I neglected to mention in my summary of the conference call was the flood threat. There is a marginal threat of flooding today. There is a slight risk of flooding tomorrow. Today Tomorrow

Here is a quick summary of the conference call I just got off with the NWS-Louisville office: Those under a supercell later today may see hail the size of golf balls. The individual cells should start to fire later today as a warm front lifts and travels into Kentucky. Keep your guard up despite the current cloud cover. Four rounds of powerful storms are possible as the atmosphere recovers, which could happen later today and into overnight. Next, Wednesday night and Wednesday afternoon. For tomorrow, we need cloud cover to keep the real threat contained. The more sunshine there is, the more dangerous tornadoes are. It is all on the table for tomorrow.

I would favor having western Kentucky added to the Enhanced Area. There is a remote possibility that it could become a level 4 Moderate Risk. I recently examined the most recent HRRR for the significant tornado parameter. Right now, it is at 5.5 out of 10. Most large tornadoes of F2 or higher have been linked to STP values greater than 1. Now, this does not imply that one will occur; rather, it indicates that the right circumstances exist for large tornadoes to form.

There is currently a severe threat over the region that is multifaceted and multi-episode. First, there was a continuous band of strong to isolated severe thunderstorms that could be seen over parts of northern Arkansas, southwestward over southeastern Missouri, and across areas of Illinois. The bigger worry is that thunderstorms that are expected to form this afternoon along or ahead of the cold front may subsequently impact on a warm, moist airflow corridor that is behind the morning's activity and provides favorable heating. Under a plume of steepening midlevel lapse rates, which is a remnant of somewhat modified dry air above and extending across the area of low-level destabilization, surface dewpoints should rebound into the mid-upper 60s F. Conditions suitable for supercells to form and remain relatively distinct should result from the superposition of these processes; hodographs (Sounding Analogs) in the lowest several kilometers appear favorable for tornadoes (some possibly strong).

From sections of the southern Plains into the mid-Mississippi, Ohio, and Tennessee Valleys, scattered to numerous severe thunderstorms are likely on Wednesday. There should be all of the severe risks, such as tornadoes, large hail, and damaging winds. There may be strong tornadoes among them. The northern extension of the more severe probabilities has been somewhat reduced in this area, based on the most recent guidance trends that indicate the warm front stalling or not moving as much northward into the Ohio Valley. If not, very large hail is likely, with the first clusters developing along the warm and cold fronts. This could happen across Missouri as early as mid-morning on Wednesday. By early Wednesday afternoon, more supercell development may also happen along or near the warm front, spanning portions of the mid-MS Valley and into the lower OH Valley. With enough 0–1 km shear to sustain low-level updraft rotation, there is also a risk of tornadoes with this warm-frontal activity in addition to the very large hail hazard. Considering the prediction, several of these tornadoes may be strong. An increasing threat for severe/damaging winds is also apparent through the late afternoon, and likely continues into at least the early evening, as convection should attempt to grow upscale into one or more intense bowing clusters. With that said, convective evolution is somewhat uncertain, and attempting to pinpoint areas of greater severe wind potential remains difficult. Given this forecast, the Storm Prediction Center now has almost the entire state of Kentucky under a level 3 Enhance Risk Area. For now the greatest tornado threat is west of I-75 and south of I-64. Remember, though that any severe weather mode will be possible in a level 3 area.

The very latest is showing even if we get morning storms, we could still have a problem.

Here is what the very latest HRRR is showing for today. Remnants of the storms that tore through the Plain States should enter western Kentucky around 9 am EDT. Some could still be strong to severe, with a possibility of producing a tornado. Given the conditions forecast for later today, any individual storm that pops up could become supercellular and produce damaging winds, hail, and a possible tornado. This threat will be present throughout the day. Around 4 pm EDT things should start to really pop. Individual storms should start forming. Everyone across the state should be weather aware. The threat will continue into the early morning hours on Wednesday. Then we will be going through a severe weather threat again during the day on Wednesday. All severe weather modes will be possible today.

As I predicted yesterday, the threat level has increased in most of Indiana, western and southwestern Ohio, and a section of Kentucky. ..THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS THE OHIO VALLEY... Throughout the Ohio Valley, sporadic severe thunderstorms are predicted for today. It looks conceivable that there may be a few tornadoes, high winds, large to extremely large hail, and severe or destructive winds. According to current models, convection related to this trough will continue and move into the middle of the Mississippi Valley by daybreak. After that, it will go downstream and maybe diminish in the morning. But following this initial activity, boundary-layer heating will produce an air mass that is moderate to extremely unstable by early afternoon. As temperatures rise into the 70s and almost 80F, convective temperatures should be easily broken, and isolated to scattered thunderstorms should develop around the southern edge of the main jet stream. Forecast soundings over the Ohio Valley show suitable shear/buoyancy for supercells. Storms that develop in this kind of setting will probably stay isolated or maybe form some kind of cluster. Large hail and a few severe tornadoes are possible. In addition, damaging winds are possible.

This is his set up

Here's what the HRRR is showing. The first one is precipitation. The second one shows the lightning. It looks like some of these storms will be quite intense.

For Tuesday, the level of severe threat has been increased to level 3 Enhanced Risk in eastern Indiana, western Ohio, and central Ohio. In further updates, it would not surprise me if the Enhanced area was extended to encompass parts of Kentucky and southeast Indiana.

Not counting the major weather networks, who or how do you watch a severe weather event? There are several on YouTube. You can watch the one you choose on your mobile device even if you lose power in your home or business. My daughter told me she watches him too. I normally watch Kentucky's own Ryan Hall. He lives in Pikeville, Kentucky, I think. https://www.youtube.com/@RyanHallYallXTRA