Flood Watch

Locations Affected

Baltimore, MD ∙ Frederick, MD ∙ Rockville, MD ∙ Gaithersburg, MD ∙ Adamstown, MD ∙ Derwood, MD ∙ Harrisonville, MD ∙ Towson, MD ∙ Discovery-Spring Garden, MD ∙ Blackhorse, MD

Full Alert Message

URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Baltimore MD/Washington DC 612 PM EDT Tue Jul 21 2026 ...FLOOD WATCH IN EFFECT THROUGH LATE SATURDAY NIGHT... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of central, north central, northeast, and northern Maryland, including the following areas, in central Maryland, Central and Southeast Howard, Central and Southeast Montgomery, Northwest Howard and Northwest Montgomery. In north central Maryland, Carroll and Frederick. In northeast Maryland, Cecil. In northern Maryland, Northern Baltimore, Northwest Harford, Southeast Harford and Southern Baltimore. * WHEN...Through late Saturday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Extensive street flooding and flooding of creeks and rivers are possible. * ADDITIONAL DETAILS... - Repeated very heavy rain may result in areas of 3 to 6 inches of rainfall and considerable flash flooding this evening. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

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