Daily Archives: May 1, 2008

The target shifts

Sure enough, updated instrument readings have prompted the Storm Prediction Center to shift the moderate risk for severe weather south and west, bringing the southern line to the Kansas/Oklahoma border and the western line to about I-135.

That means Wichita’s included. See the link in the blogpost below to get a look at the updated map.

Forecasters still say a strong cap and limited moisture could prevent widespread supercell development — but it’s still wise to keep an eye on the weather. Put vehicles in the garage, monitor preferred media outlets, and have the weather radio turned on and tuned in.

Thursday’s outlook for the region

Here’s the Storm Prediction Center’s outlook for today, for those wanting to see a map.

Deciphering the text below the map isn’t easy for those not versed in meteorological terminology, but forecasters say uncertainty about how much moisture and when it arrives, along with the timing of instability in the upper atmosphere make this “a more difficult forecast than usual for such a potent kinematic/dynamic setup.”

Where storms do form, large hail and even tornadoes are a threat, however.

A hint of tornado deja vu

If forecasters sound particularly concerned today, there’s a reason: Greg Carbin, warning coordination meteorologist for the Storm Prediction Center in Norman, Okla., said the upper-level conditions today over southcentral and eastern Kansas echo the set-up on April 26, 1991.

That date should sound familiar to long-time residents of the area. That’s the day a huge tornado struck Haysville, south Wichita, McConnell Air Force Base and Andover, and other tornadoes touched down in the region as well.

“The pattern is very dynamic, and reminiscent of other big days” for tornadoes, Carbin said.

He’ll be keeping a close watch on a corridor about 100 miles wide from just north of Wichita to northeast of Emporia and west of Kansas City. If a supercell develops in that corridor between 5 p.m. and 7 p.m. today, he said, it could very well produce a strong tornado and large hail.

There isn’t as much moisture already in place as there was on April 26, 1991, he said, and that figures to limit storm development to at least some degree.

But the strong southerly winds that have been buffeting Wichita this morning are feeding moisture into the region from the Gulf of Mexico, and the clear skies will allow ample afternoon heating to increase instability in the atmosphere.

A strong cap is in place, Carbin said, and how soon and where it erodes will be a key factor in what and where storms develop. If something develops, he said, it could happen quickly.

That’s why it’s important for folks to be alert today.