Excessive Heat — Calvert, Maryland

2023-07-28 · Calvert, Maryland

Event narrative

A Maryland Department of Transportation mesonet, MD-147, located at the intersection of Maryland Route 4 and Thomas Johnson Bridge, measured heat indices as high as 113F. Several other mesonets across Calvert County measured peak heat indices in excess of 110F.

Wider weather episode

The combination of a strong upper-level high pressure over the central United States and moist southwest winds resulted in hot and humid conditions across the Mid-Atlantic that produced excessive heat conditions.

Source: NOAA Storm Events Database, event_id 1121051. Narrative written by the NWS forecast office that issued the report.