Wednesday, May 13, 2009

5/13 - 4pm - Soggy Days Ahead

A batch of heavy rain is passing to our north at the moment and I think they'll just barely miss us this afternoon. Areas north of the Ohio River will most likely receive rain, but Louisville will probably stay dry until late tonight. A nasty line of storms is expected to develop and charge through the OKC and St. Louis areas this evening, so the SPC has put that area under a MODERATE Risk for severe weather:


These storms will weaken as they approach the Louisville area late tonight and into tomorrow morning, so I don't expect any severe weather here. It's just too late at night for these storms to stay severe because of the lack of solar heating an instability. Any rain tomorrow should end by the early afternoon.

Friday will be warmer with a high near 80, but rain will still be a factor. A few showers and thunderstorms will come through during the afternoon, so keep the umbrella handy. Spotty showers will develop on Saturday morning, but those should fill in and create a rainy afternoon and evening as we head into the weekend. The leftover rain on Sunday should clear out in early morning and leave us with a dry week to look forward to.

24 days until storm chasing begins!

2 comments:

Richard said...

What do you think the chances for these storms to still be severe when they come through late tonight? Couldn't they just overcome the instability or are there other limiting factors as well?

Ryan Hoke said...

There is certainly a chance that these could maintain their strength when they come through, but the chance is fairly slim. Without daytime heating the atmosphere will lose most instability, which helps air parcels rise up and condense into storm clouds in the troposphere. They can only weaken from here on out at night, but there could be some marginal severe weather in some spots around the region tonight into tomorrow morning. It all depends on how fast these storms weaken overnight.