Month: September 2015

29 Sep

May 8, 2015 – Texas

stratosigma / Blog, Storm Chasing / / Comments

Day two of a multi-day chase trip began in Wichita Falls where I stayed the night before after a successful tornado intercept on the previous day near Sanger. Target for the day was southwest of Wichita Falls, so no one was in a rush to leave the hotel. Skip Talbot, Jennifer Brindley and Phil Bates were caravanning with Sean Casey and the TIV in Doghouse and we discussed the day’s prospects before going our separate ways. A cutoff low was still over California and expected to move a little east during the day while the southern branch of diffluent flow at 250mb was expected to move over the southern areas of the target area. A cold front extended from Iowa through Oklahoma and into the Texas Panhandle and into New Mexico where it was stationary.  A dryline intersected the front in New Mexico and was expected to mix eastward into Texas throughout the day. Outflow from the overnight MCS was expected to lift north through the day, possibly stalling out south of the Red River. That was the focus for severe weather as the air mass south of it was expected to become strongly unstable.
Read more

27 Sep

May 7, 2015 – Sanger, Texas Tornado

stratosigma / Blog, Storm Chasing / / Comments

Thursday, May 7th was the start of a four day chase event starting in the Southern Plains and moving north each day into the Northern Plains on the 10th as a pretty deep 500mb trough was making it’s way onshore from the Pacific through the four corners region and into the Dakotas. Each day would present itself with a severe weather opportunity. The first day being focused along the Red River area along the Oklahoma/Texas border as well as further upslope in the SW KS/OK Panhandle areas where dryline intersected a cold front. Overnight convection was still ongoing across southern and eastern Oklahoma at daybreak and while upper level energy was still quite a ways west, I felt that the outflow from the overnight MCS might be the focus area for the day and set my target for Wichita Falls.
Read more

25 Sep

April 25, 2015 – Illinois

stratosigma / Blog, Storm Chasing / / Comments

April 25th was the second day of a little mini chase weekend and a shortwave trough was moving east into the Ohio Valley while it deamplified a bit. That was coupled with the nose of a 130kt jet streak at 250mb and a sub-1000mb surface low that was progged to drift east throughout the day. The plan was to play in Southern Illinois just east of St. Louis where a clear slot was expected to form allowing for modest instability to develop and hope for storms to develop and ride the front.
Read more

23 Sep

April 24, 2015 – Kansas

stratosigma / Blog, Storm Chasing / / Comments

April 24th and 25th presented a couple of opportunities for severe weather across the Great Plains and lower Ohio Valley, so I left Michigan on the 23rd and overnighted in Cameron, MO. Cameron has become my goto town for sleeping if I’m heading out to chase the Plains and leave the evening before. Anyway, the 24th presented two targets for chasers. The first target area was Central Kansas where a surface low and slow moving warm front provided a focus for severe weather. The second was Eastern Texas where a warm front/outflow boundary was being intersected by a rapidly advancing dryline. Both areas were delineated in an enhanced risk from the Storm Prediction Center, although the Texas play had higher tornado probabilities.
Read more