Maryland, 2001

Heavy Rain in Maryland, March 29 to 30, 2001

March 29 to 30, 2001 · NWS LWX · 12 events in 12 counties and zones

Low pressure brought a period of heavy rainfall to the Mid Atlantic region between the morning of the 29th and the morning of the 30th. 5 inches of rain was recorded.

Where it happened

Every event with a place to put it; 12 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
12

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.

What happened

The episode as NWS LWX wrote it up.

Low pressure brought a period of heavy rainfall to the Mid Atlantic region between the morning of the 29th and the morning of the 30th. Between 1.5 and 2.5 inches of rain was recorded.

What forecasters said that day

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 Mar 29, 9:45 AM EST, 15 minutes earlier.

Area forecast discussion, Mar 29, 9:45 AM EST, 15 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
945 AM EST THU MAR 29 2001

RAFL HAS ADVNCD ACRS MUCH OF CWFA ATTM...AND SHUD MAKE IT ACRS REST
OF AREA NXT HR OR SO. MRNG SNDGS MOIST...BUT H8 TEMP INCR OF 3C FM
15-21 UTC SHUD SPPRT A MODEST MAXT RISE. IN THE W...AMS NOT AS
SATURTD BUT CAD WL COMPENSATE. GOING /DREARY/ FCST LOOKS FINE PER
12Z ETA...AND WL ADJUST MAINLY FOR CRRNT CONDS-- RMV MRNG WRDG AND
SNW MNTN IN W.  MAY END UP BEING THE LWR END OF MAXT RNG.

RADAR INFO...REPLCMNT PART ON A PLANE RIGHT NOW...HOPEFULLY RADAR WL
BE BACK UP THIS AFTN.

NEW ZFP...ETC 1500-1530 UTC.

.LWX...
DC...NONE.
MD...NONE.
VA...NONE.
WV...NONE.

HTS

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

12 heavy rain. Local standard time, as filed.

Heavy Rain, Washington

When
March 29, 10:00 AM EST to March 30, 10:00 AM EST
Where
Washington County, Countywide
Reported by
TRAINED SPOTTER
Coordinates
39.604, -77.814 (the zone’s center; the record gives no point)

Heavy Rain, Frederick

When
March 29, 10:00 AM EST to March 30, 10:00 AM EST
Where
Frederick County, Countywide
Reported by
TRAINED SPOTTER
Coordinates
39.472, -77.398 (the zone’s center; the record gives no point)

Heavy Rain, Carroll

When
March 29, 10:00 AM EST to March 30, 10:00 AM EST
Where
Carroll County, Countywide
Reported by
TRAINED SPOTTER
Coordinates
39.563, -77.022 (the zone’s center; the record gives no point)

Heavy Rain, Baltimore

When
March 29, 10:00 AM EST to March 30, 10:00 AM EST
Where
Baltimore County, Countywide
Reported by
TRAINED SPOTTER
Coordinates
39.443, -76.616 (the zone’s center; the record gives no point)

Heavy Rain, Baltimore City (C)

When
March 29, 10:00 AM EST to March 30, 10:00 AM EST
Where
Baltimore City (C) County, Countywide
Reported by
TRAINED SPOTTER
Coordinates
39.290, -76.612 (the zone’s center; the record gives no point)

Heavy Rain, Harford

When
March 29, 10:00 AM EST to March 30, 10:00 AM EST
Where
Harford County, Countywide
Reported by
TRAINED SPOTTER
Coordinates
39.536, -76.299 (the zone’s center; the record gives no point)

Heavy Rain, Howard

When
March 29, 10:00 AM EST to March 30, 10:00 AM EST
Where
Howard County, Countywide
Reported by
TRAINED SPOTTER
Coordinates
39.251, -76.931 (the zone’s center; the record gives no point)

Heavy Rain, Montgomery

When
March 29, 10:00 AM EST to March 30, 10:00 AM EST
Where
Montgomery County, Countywide
Reported by
TRAINED SPOTTER
Coordinates
39.136, -77.204 (the zone’s center; the record gives no point)

Heavy Rain, Prince George'S

When
March 29, 10:00 AM EST to March 30, 10:00 AM EST
Where
Prince George'S County, Countywide
Reported by
TRAINED SPOTTER
Coordinates
38.830, -76.847 (the zone’s center; the record gives no point)

Heavy Rain, Anne Arundel

When
March 29, 10:00 AM EST to March 30, 10:00 AM EST
Where
Anne Arundel County, Countywide
Reported by
TRAINED SPOTTER
Coordinates
38.994, -76.568 (the zone’s center; the record gives no point)

Heavy Rain, Charles

When
March 29, 10:00 AM EST to March 30, 10:00 AM EST
Where
Charles County, Countywide
Reported by
TRAINED SPOTTER
Coordinates
38.474, -77.013 (the zone’s center; the record gives no point)

Heavy Rain, Calvert

When
March 29, 10:00 AM EST to March 30, 10:00 AM EST
Where
Calvert County, Countywide
Reported by
TRAINED SPOTTER
Coordinates
38.535, -76.531 (the zone’s center; the record gives no point)

What these are

Heavy Rain
Rainfall totals unusual for the place and season that did not produce a flood.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Maryland in 2001Every state in 2001This day in weather historyWarnings in Maryland, March 2001

Sources

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 2026-09-24. Each event’s entry at NCEI: 5239838, 5239839, 5239840, 5239841, 5239842, 5239843, 5239844, 5239845, 5239846, 5239847, 5239848, 5239849.