Severe Weather Summary - April 8-10, 2011

Severe Weather April 8-10, 2011

It's April and even in a drought that usually means severe thunderstorms in the Southern Plains. Parts of Oklahoma and north Texas experienced severe thunderstorms on the evening of April 8th and again on the evening of April 10th. This is a brief summary of both of those events.

April 8

Thunderstorms developed by mid afternoon across north central Oklahoma along the dry line and quickly became severe. Several of the storms became quite intense and produced very large hail, some larger than baseballs. Click here for a map showing the storm reports from the event. While we're still putting all the pieces together, it appears a brief weak tornado occurred near Kildare in Kay County, Oklahoma and was reported by storm spotters/chasers. We are not aware of any damage caused by this tornado.

The most significant storm on April 8th caused extensive damage in Ponca City, where numerous buildings (including both homes and businesses) were heavily damaged or destroyed, trees uprooted and blown over, power poles blown down and power knocked out for most of the city. The automated weather station at the Ponca City Airport measured a wind gust of 94 mph before power was lost. Based on ground damage surveys and analysis of radar data, it appears the damage was the result of an intense microburst associated with the rear flank downdraft of a large severe thunderstorm. It is not uncommon for a storm like this to produce damaging winds....

April 10

Sunday April 9 saw more thunderstorms develop, this time across southern Oklahoma and north Texas. The storms formed toward evening along the dry line which had stalled just east of Interstate 35 and curved back into north Texas. These storms also became quite intense and produced both hail and damaging wind. Click here for a map showing the storm reports from the April 10 event.

The most significant damage occurred around Holdenville, where winds in excess of 60 mph damaged 15 to 20 structures and snapped 5 electrical transmission poles. The storm also produced a lot of hail, mostly quarter size but some up to the size of golfballs. The hail was six to eight inches deep in Holdenville, and some of it was still on the ground the next morning. Hail blown by the wind damaged several homes in Holdenville.

If you have pictures or video from any of the storms or the damage,  please email them to us at  sr-oun.spotter@noaa.gov and indicate whether or not we have permission to use that on our webpage.

 

 



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