Supercell and Tornadoes - Southwest Oklahoma - March 18, 2012

While visiting family in Elk City, I chased some storms on March 14, 16 and 18, and wound up seeing three tornadoes on the 18th. (I'll post details of the other two chases later).

I made the Sunday chase after a convective shambles in the TX panhandle on March 16. This turned out to be an incredible follow-up. Deciding between better moisture south near the Red River vs. better H5 winds north by the OK panhandle was my biggest challenge as I made my way toward Shamrock, TX on I-40. Based on reliable results with NAM and HRRR forecast models on March 14 and 16, I was relying on them more heavily.

By the time I got to Shamrock, HRRR was forecasting some convection up by the OK panhandle and southwest KS, but it was showing this to be short-lived. The more robust, sustained development was forecast along the dryline west and southwest of Childress and moving into southwest OK. When I got to Shamrock, the cumulus field was congesting along the dryline in agreement with that area proving to be a successful initiation point, so I fueled up, cleaned the windshield and headed south.

As I approached the Red River, towers were going up, and as I moved into Childress, a really nice updraft and anvil were overshadowing the town.

Storm Initiation

Developing Cell Panorama

Following the storm back over the Red River meant either racing the core along Hwy 62 and glomming with an inbound stream of chasers, or taking some side roads over to Rt. 680 just NE of the OK/TX border. I chose 680, and after sledding along several miles of farm road whose last maintenance heralds from before the dust bowl days, I made it to an I-Dare-You type bridge crossing with the storm moving over the OK border just ahead.

Bridge Crossing at the Red River

After cringing at the forbidding screeching noises as I rolled across the bridge, I parked about a mile further north and shot some time lapse video and panorama shots. The lead cell was being hugged by a trailing cell with an incredibly solid hail core. I wondered if this would be like the mess on Friday near Lubbock with each batch of convection being demolished by whatever formed behind or in its inflow. For a while, both cells sported great structure and inflow features, and I couldn't decide what to photograph.

Wall Cloud on Lead Cell

Structure on Trailing Cell

Solid FFD Core on Trailing Cell

Panorama of Both Cells

As I followed at a hail-safe, happy-rental-car distance, the lead cell became dominant and from there, the RFD did all sorts of wonderful things to the updraft base and enclosed wall cloud. From that distance, I was having a hard time resolving details behind the nearly constant precipitation curtain, but rotation had become sustained and it was one great photo op after another with some very tantalizing wall cloud structures emerging periodically through the hazy mists.

RFD Shelf and Wall Cloud Behind Precipitation Curtain

RFD with Rotating Wall Cloud Structure in Background

Structure Panoramas


I travelled the smaller county roads as much as possible, which lowered the convergence factor with chaser hordes. I still encountered smaller groups at key intersections and vantage points. This small group was enjoying a perfect RFD donut hole backed by a shaggy wall cloud and tail.

Chaser Audience, RFD Donut Hole and Wall Cloud/Tail Cloud


About the time the tornado warning went up for the storm, I was back on a main road headed north, trying to get in better position when I was passed by law enforcement blazing north with lights flashing. I figured they were getting ready to road block my route, so I started to detour east to find another dicey county road, when a quick check out the side window showed a funnel snaking down (7:04 PM). I squeezed off some still shots, but wasn't in time with the video camera. The slender funnel I saw may have been a small satellite to something bigger happening behind the precipitation curtain--there appears to something ominous going on along the right edge of that rain curtain in the photo.

Satellite Tornado and Rain Wrapped Circulation (7:04 PM)

As I stepped my way north and east, I was awestruck by the incredible structure on this storm. While I wish I could have been closer to view the detail in and around the wall cloud and the tornadoes it spawned, I can't complain in the slightest about the views I got of the entire storm from a few miles away.

More Awesome Structure

As I navigated northward near Granite, OK, I found a high vantage that gave me a view of a second tornado spinning up near Willow, OK (7:30 PM).

Willow Tornado (7:30 PM)




My third for the day spun up a few minutes later at 7:38 PM. This one lasted a couple minutes before the slender rope dissipated.

Third Tornado (7:38 PM)

I followed the storm a bit more as it approached Clinton, but lightning was too sporadic to make out any more features, so I made my way into Elk City for a big steak and fries at Western Sizzlin. Chasing solo, trying to run two cameras and experiencing this unbelievable storm gave me a case of full-blown sensory overload--I'm still having vivid flashbacks. It was a great chase and I can't wait for my next opportunity in the northern plains in June.

Video of Supercell and Tornadoes in Southwest Oklahoma

Links to reports and photos from others chasing the storm: