JUNE 21-22, 1998 WARM SEASON CASE STUDY

US Weather Research Program (USWRP) and
NOAA/NEXRAD Radar Operations Center (ROC)


This Mesoscale Convective System (MCS) lasted more than 24 hours from 2000 UTC on June 21 to 1200 UTC on June 23 in 1998. A sequence of intensification, decay, and regeneration led to this relatively long-lived mesoscale convective event.

Early afternoon convection on June 21 along the front range of the Rocky Mountains in northern Colorado organized into an MCS as it moved eastward across Kansas. The MCS reached its most intense rainout phase in central Kansas as it encountered moist, southeasterly flow from the Gulf. New organized convection which developed in eastern Kansas ahead of the older MCS continued eastward as a new MCS, eventually diving southeastward as it encountered northward-streaming, gulf-coast moist air west of the Appalachian Mountains.

Detailed images: