Summary of April 10, 2001 Storm Damage Survey.

DMGSVRY	April 10 2001 Damage Survey Report - Callaway County Missouri
STLPNSSTL	April 10 2001 Public Information Statement

 

Reflectivity Image (0.5° slice)(left); Storm-relative velocity image (0.5° slice)(right) at  0135 UTC (8:35 PM CDT) from WSR-88D St. Louis (KLSX). The reflectivity image (left) shows a supercell exhibiting a classic "S" shape configuration.  The Weak Echo Region (WER) signifies the storm's updraft while the Rear Flank Downdraft (RFD) respresents the storm's downdraft.  Large hail (golfball and larger occurred in the region of 60 dBZ reflectivity and greater (white area - reflectivity).  The storm-relative velocity image (right) shows two circulations: one over northeast Warren-northwest St. Charles (larger white oval) and the second over far southern Lincoln county (smaller white circle).  The red inverted
triangle represents a Tornadic Vortex Signature (TVS). 

April 10, 2001 Microbarograph (pressure) trace at WFO St. Louis.   The pressure jump is associated with an 'internal gravity wave.'  The jump is frequently triggered by moving cold fronts or low-level thunderstorm outflows as it impinges upon a stable temperature profile.

 

For Detailed Presentation of April 10, 2001 Storm click on AMS Preprint written by Fred Glass and Mark Britt (WFO St. Louis).  This paper will be presented at the 21st Conference on Severe Local Storms (San Antonio TX)

Return to Storm Damage Survey Page