Light winds combined with an abundant amount of low-level moisture to produce areas of dense fog. The dense fog occurred during the late evening hours of the 23rd and it lasted into the morning hours of the 24th.
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The episode as NWS LWX wrote it up.
Light winds combined with an abundant amount of low-level moisture to produce areas of dense fog. The dense fog occurred during the late evening hours of the 23rd and it lasted into the morning hours of the 24th.
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 Sep 23, 6:56 PM EST, 4 hours 41 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
1 dense fog. Local standard time, as filed.
Visibility was reported to be around one quarter of a mile.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2011Every state in 2011This day in weather historyWarnings in Maryland, September 2011
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: 347976.