An unstable atmosphere along with plenty of moisture led to the development of showers and thunderstorms. The thunderstorms were slow moving, and trained over the same areas in spots resulting in flash flooding.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LWX wrote it up.
An unstable atmosphere along with plenty of moisture led to the development of showers and thunderstorms. The thunderstorms were slow moving, and trained over the same areas in spots resulting in flash flooding. Localized rainfall totals of 2 to 4 inches were observed, with upwards of 5 inches in the most persistent thunderstorms.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Baltimore/Washington wrote its last area forecast discussion before the first event at Jul 19, 3:20 PM EST, 57 minutes earlier.
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</html>The Sterling radar (KLWX), 41 km away, was scanning. The volume nearest the first event began at 21:18 UTC.
15 flash flood. Local standard time, as filed.
Water rescue reported at intersection of Cedar Avenue and Old Philadelphia Avenue. Water reported to be flowing at least one foot deep.
The stream gage on Sligo Creek at Takoma Park rose to flood stage, which is at 5.5 feet, rapidly in less than an hour. The gage then crested at 7.52 feet shortly thereafter. This was a little over a 6 foot rise in just over an hour.
At least six inches of rapidly flowing water was along Georgia Avenue and Columbia Boulevard.
Flood sensor at Sligo Creek Parkway and New Hampshire | Avenue (MD 650) had a 10 feet rise in 30 minutes.
Five feet of standing water at the intersection of East-West Hwy and Washington Ave. One car and a fire truck stranded in the water.
Vehicle stranded in deep moving water at the intersection of Wayne Avenue and Sligo Creek Pkwy.
Water rescue for vehicle stranded in high water at Randolph Road and Glenallan Avenue.
Three occupied vehicles stranded in high water at Briggs Road and Layhill Road. Water rescue ongoing.
Occupied vehicle stuck in high water at Southwood Avenue and Colesville Road. Water rescue ongoing.
A water rescue occurred along Bradley Boulevard and Kentsdale Drive due to rapidly flowing water estimated around 3 feet deep.
A water rescue occurred along Sligo Creek Parkway with water rapidly flowing around 2 to 3 feet deep.
A vehicle was stranded in water about 2 to 3 feet deep along East-West Highway around Silver Spring.
Water around 1 foot deep was flowing across Sligo Creek Parkway around US-29.
Around 1 to 2 feet of flowing water over Bradley Boulevard where it crosses Cabin John Creek.
Approximately 20 people were rescued by Montgomery | County Fire & Rescue and Park Police after being | stranded at Meadowbrook Park after Rock Creek rose | rapidly.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2025Every state in 2025This day in weather historyWarnings in Maryland, July 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1264789, 1264798, 1264796, 1264790, 1264793, 1264795, 1264800, 1264801, 1264802, 1264803, 1264804, 1264808, 1264807, 1264806, 1264809.