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February 20, 2012 Storm Chase

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Chaser: David Reimer

Video/Photo Summary: The setup for February 20, 2012 was an unusual one by chasing standards. Dewpoints were only in the mid 40s, but very cold 500 millibar temperatures with a strong upper level disturbance allowed for sufficant instability to develop. That instability and the cold temperatures aloft helped offset the lack of moisture. A line of low-topped severe thunderstorms to formed across Northern Oklahoma with very strong winds being brought down to the surface. Many of these photos were taken in Northern Oklahoma, but be sure to check each photo for a specific location.

Video:

None

Photos:

2/20/2012 - North Oklahoma Chase
2/20/2012 - North Oklahoma Chase
10 photos
  • A precipitation core on the right side of the photo with a second precipitation core noted in the center of the photo. An additional core was located just to the left of this photo. This is what a broken line of thunderstorms looks like visually.Two precipitation cores with a cool looking cloud deck.A suspicious feature emerging from a precipitation core. This is most likely only scud since no organized rotation was observed. However, it goes to show that careful examination of cloud features is needed before filing a report.This is the only 'tower' I saw during the chase. Notice how it isn't very vertical, hence the name 'low-topped convection'.Line of low topped, but severe storms racing off into Eastern Oklahoma.Line of low topped, but severe storms racing off into Eastern Oklahoma.David's vehicle as seen from his seat while waiting for storms to fire up in Oklahoma. These kinds of photos happen when there is nothing to do.Low topped convection moving along at over 55 MPH off to my east. This is what low topped storms look like from behind. You can actually see some base features in this photo as well.This is the only 'tower' I saw during the chase. Notice how it isn't very vertical, hence the name 'low-topped convection'.Fellow Storm Chaser Russ Contreras' vehicle on top of my personal favorite night-time spotting ground. There are obviously better locations without the light pollution, but this is right on the way home.
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