Weather alerts in Maryland, 2021
1,236 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 1,236
- Warnings
- 609
- Watches
- 122
- Advisories
- 233
- Busiest month
- July241 alerts
- Busiest day
- September 1, 202173 alerts
Over time
By month
The alerts
1,236 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Baltimore County251
- Anne Arundel County243
- Prince George's County232
- Montgomery County225
- Harford County214
- Frederick County194
- City of Baltimore191
- Charles County184
- Cecil County176
- Dorchester County173
- Howard County172
- Saint Mary's County171
- Carroll County168
- Queen Anne's County162
- Washington County161
- Caroline County156
- Kent County155
- Calvert County151
- Talbot County136
- Wicomico County132
- Worcester County130
- Allegany County120
- Somerset County112
- Garrett County36
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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. Rebuilt daily.