Excessive Heat Warnings in Maryland
50 excessive heat warnings since 1986. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of excessive heat warnings reaches back to 2005.
Excessive Heat Warnings by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Excessive Heat Warnings
- 50
- Busiest year
- 202412 excessive heat warnings
- Average year
- 5over 11 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Baltimore County26
- City of Baltimore26
- Anne Arundel County21
- Calvert County20
- Prince George's County20
- Charles County19
- Saint Mary's County19
- Cecil County13
- Howard County12
- Montgomery County12
- Caroline County11
- Kent County11
- Queen Anne's County11
- Talbot County11
- Carroll County10
- Dorchester County10
- Frederick County10
- Somerset County10
- Wicomico County10
- Washington County9
- Worcester County9
- Harford County9
- Allegany County2
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.