Event Summary
     National Weather Service, Raleigh NC

June 11, 2006 Severe Weather Event
Updated 2006/06/12






Event Headlines -
...The National Weather Service in Raleigh issued 28 Severe Thunderstorm and Tornado Warnings on Sunday, June 11, 2006...
...A storm survey dispatched to investigate the tornado report near Harris Lake found straight line wind damage and no indication of a tornado touchdown...


Event Overview -
Several complexes of severe thunderstorms moved across central North Carolina during the afternoon and evening of June 11, 2006. Sunny skies on Sunday allowed surface temperatures to reach the mid 80s to around 90 degrees. The warm surface temperatures combined with surface dewpoints in the mid to upper 60s resulted in a moderately unstable airmass with CAPE values of around 2000 J/kg.

Convection initially developed across the North Carolina Mountains around 200 PM EDT and then spread east into the NC Foothills. The showers and thunderstorms intensified as they spread east into the Piedmont. The convection initiated and interacted with several surface boundaries resulting in thunderstorm clusters with complex structure and life cycles. There were widespread reports of large hail and damaging winds. Several fires were started by the frequent lightning.



Severe Weather Reports -

Text of severe weather reports across central North Carolina





Satellite

Visible satellite imagery from 2202Z (602 PM EDT) on Sunday, June 11, 2006

The visible satellite image below from 2202Z (602 PM EDT) shows several complexes of thunderstorms across portions of central and western North Carolina. Severe thunderstorms were observed at around the same time as this satellite picture in the Triad Region, near Charlotte, and near Lumberton. A radar image from the Raleigh NWS radar at nearly the same time as the satellite picture is available.

A Java Loop of Visible satellite imagery from 1702Z (102 PM EDT) through 2345Z (745 PM EDT) Sunday, June 11, 2006 is also available.

Visible satellite imagery from 2202Z (602 PM EDT) on Sunday, June 11, 2006



Surface Analysis

Analyzed surface map 00Z (800 PM EDT) Sunday, June 11, 2006

The surface analysis from 00Z (800 PM EDT) Sunday, June 11, 2006 depicts a cold front bisecting the state from northwest to southeast. This front provided a focusing mechanism for convection to develop.

A Java Loop of surface analysis imagery from 00Z Sunday, June 11, 2006 through 12Z Monday, June 12, 2006 shows the cold front remaining relatively stationary across the state. Showers and thunderstorms repeatedly developed across central North Carolina during this period.

Surface analysis from 00Z (800 PM EDT) Sunday, June 11, 2006



Radar Loops

Java Loop of every half hour KRAX radar base reflectivity imagery and warnings from 1134Z (734 AM EDT) through 0358Z (1158 PM EDT) Sunday, June 11, 2006. Note - this loop includes imagery from every half hour (includes 34 frames !)

Java Loop of all KRAX radar base reflectivity imagery and warnings from 2030Z (430 PM EDT) through 0300Z (1100 PM EDT) Sunday, June 11, 2006. Note - this loop includes imagery from every radar scan (includes 95 frames !)


KRAX base reflectivity image from 2250Z on Sunday, June 11, 2006 (650 PM EDT)





Case study team -
Brandon Dunstan
Brandon Vincent
Darin Figurskey
Jonathan Blaes

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