Storm Highway by Dan Robinson
Storm chasing, photography and the open roadClick for an important message
Home | Blog Index | Blog Archives | Christianity & Faith Essays | Storm Chasing Essays

                   Thursday, May 9, 2013 - 7:05PM CDT

May 9 Missouri/Illinois storms

By DAN ROBINSON
Storm Chaser/Photographer
25 Years of Storm Chasing
Important Message
Dan's RSS/XML feed
Dan's YouTube Video Channel

I had moderate expectations for today's setup, with stronger-than-forecast midlevel flow and skies clearing out by midday. I started the day by observing storms going up at Dardenne Prairie, MO near the center of a strong, very well-defined MCV (meso-convective vortex, a small low pressure generated by a large storm complex the day before). These were unimpressive despite being in the vorticity-rich environment, thanks to weak instability.

This storm went on to produce a tornado just east of I-55 about an hour later.

I abandoned this area for a new storm going up in a region of much better instability southeast of St. Louis. I met the storm's forward flank precip at my hometown, New Baden, and got ahead of it at Okawville. The storm was strongly outflow dominant, but remained discrete and organized. This was the view to the northwest at the I-64/Highway 177 interchange at Okawville:

The VIL data (Vertically Integrated Liquid, a radar product used to estimate hail size) for the storm spiked impressively at this point, indicating there could be sizeable hail in the core. I turned north at New Minden to see if I could find any, with this view just before I let the storm catch me and pass over:

I saw only a brief shower of pea-sized hail in the heaviest part of the precip. I can't remember a storm that had such a strong VIL return having so little hail. It's possible that the larger hail fell to the east, or maybe this storm was just an VIL anomaly. I tried following the storm east, but slow traffic on Highway 161 prevented me from catching up again. I returned home at 6PM.

Post a Comment
Please note that IP addresses are logged. Abuse will be reported to ISPs or corporate network management

The following comments were posted before this site switched to a new comment system on August 27, 2016:

25 Years of Storm Chasing
Important Message
Dan's RSS/XML feed
Dan's YouTube Video Channel

This web site is made possible by support from CIS Internet.
CIS Results-Oriented Internet Marketing

GO: Home | Storm Chasing | Photography | Extreme Weather Library | Stock Footage | Blog

Featured Weather Library Article:

Power arcs during storms
All about those blue-green glows in the sky and what causes them.
More Library Articles

All content © Dan Robinson. All usage requires a paid license - please contact Dan for inquiries.

Web Site Design and Internet Marketing by CIS Internet