Flash Flood Warnings in Maryland, 2026

By month

25 of 43 flash flood warnings covering Maryland in 2026 had a flash flood report inside them; 35 of 43 flash flood reports fell inside a warning, on average 59 minutes after it went out.

Maryland, 2026

Each office's whole area, 2026

An office's figures cover every county it serves, including across state lines.

The year is still running; reports filed late and damage surveys can still change these figures.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

• Baltimore County11
• City of Baltimore9
• Worcester County6
• Montgomery County6
• Caroline County6
• Queen Anne's County5
• Talbot County5
• Anne Arundel County5
• Harford County4
• Somerset County4
• Frederick County3
• Wicomico County3
• Howard County2
• Kent County2
• Garrett County2
• Allegany County1
• Saint Mary's County1
• Prince George's County1
• Washington County1

1. July 6, 20265flash flood warnings
2. July 18, 20265flash flood warnings
3. July 7, 20263flash flood warnings
4. July 21, 20263flash flood warnings
5. July 22, 20263flash flood warnings
6. August 7, 20263flash flood warnings
7. July 5, 20262flash flood warnings
8. July 9, 20262flash flood warnings
9. July 28, 20262flash flood warnings
10. August 10, 20262flash flood warnings
11. June 23, 20261flash flood warnings
12. July 23, 20261flash flood warnings

Alerts in force nowTornadoes on recordThe radar archive2025

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.