Composites of Heavy Rain Producing Elevated Thunderstorms in the Central United States

Figure 4

EAX CWA composite for 0–3 hr prior to event time showing 250 hPa: (a) geopotential height (black, gpm), isotachs (color-filled, kts), and divergence (dashed, ×10⁻⁵ s⁻¹); (b) mean geopotential height (black, gpm) and 75–25 percentile mean spread (color-filled, gpm); (c) mean wind speed (black,  kts) and 75–25 percentile mean spread (color-filled, kts); (d) mean divergence (black, ×10⁻⁵ s⁻¹) and 75–25 percentile mean spread (color-filled, ×10⁻⁵ s⁻¹); (e) regional spaghetti plot of the 90-knot isotach at 250 hPa from each composite member (each is a different color). The star is located at the centroid of the CWA.

(a)

(b)

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(e)