Mesoanalyses of Pre-Frontal Thunderstorm Conditions

On August 22nd, a cold front moved across a part of the Eastern Region (ER) from the northwest setting off numerous thunderstorms along and ahead of the front. Severe thunderstorms occurred in Virginia, Maryland and southeastern Pennsylvania. Mesoscale conditions favorable for the development of "air mass" type thunderstorms were discussed in ER Technical Attachment No. 83-11 (1983); a similar analysis of thunderstorm development accompanied by synoptic scale dynamics will be presented here.