March 27, 2009 - Northeast Texas
A powerful spring storm moving southeast out of the Rockies and across north Texas was poised to spawn widespread severe weather across northeast Texas, north Louisiana, and south Arkansas during the afternoon hours of March 27. Four days prior to this system moving through the area, a series of upper level short waves had produced several rounds of severe weather across the deep south. This day was no exception. A small, but potent short wave was indicated moving out of south Texas during the morning of March 27. By noon, severe thunderstorms began to develop across southeast Texas moving to the east-northeast into central and southwest Louisiana.
Concern was these storms would disrupt the return southerly flow out of the gulf preventing the severe outbreak predicted in north Louisiana and northeast Texas. After arriving in Shreveport we decided that the storms to the south were of the high-precipitation (HP) variety and chase conditions with the terrain (many tall trees) would prevent a good view of the storm. Therefore, we continued west to Tyler. Upon arriving at Tyler around 4:30 PM, several bands of showers and a few thunderstorms began developing along and ahead of the dryline. It was immediately evident (see the photo above and those below) the towers were limited in upward motion.
This was the trend. We dissected the forming squall line several times but no severe weather could be found. The initial line quickly weakened and a new line developed just west of the Texas-Louisiana border. These storms had a little more energy with them as they cross the Red River near Shreveport prompting a severe thunderstorm warning. We penetrated this line between Bossier City and Minden and experienced gusty winds of around 30 mph and heavy rain - but nothing severe.
We arrived back home in Monroe around 10:30 PM in time for the southern-most cell of the line to accelerate forward and develop a cyclonic signature on Doppler prompting a tornado warning for Ouachita and surrounding parishes. The signature persisted to the Mississippi River.