Alert archive / Maryland / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 19, NWS Baltimore/Washington

April 21, 2000Anne Arundel County, Baltimore County, City of Baltimore, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Apr 21, 2000, 5:05 PM EDT for Anne Arundel County, Baltimore County, City of Baltimore, Maryland. It was in force for 55 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 21, 2000, 5:05 PM EDT (21:05 UTC)
Expired: Apr 21, 2000, 6:00 PM EDT
In force: 55 min
Issued by: NWS Baltimore/Washington
Area: Whole counties

Counties Anne Arundel County, MD, Baltimore County, MD, City of Baltimore, MD

The radar

The Sterling radar (KLWX), 82 km from the middle of the area, began a volume at 21:06 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.1 hours before the alert went out and 76 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 626 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 230 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Apr 21, 2:45 PM EDT, 2 hours 20 minutes earlier.

Area forecast discussion, Apr 21, 2:45 PM EDT, 2 hours 20 minutes before

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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 21, 1:32 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Fauquier, Spotsylvania, Stafford	43 min
Apr 21, 2:10 PM EDT	Severe Thunderstorm Warning	LWX	Prince William	50 min
Apr 21, 2:21 PM EDT	Severe Thunderstorm Warning	LWX	Spotsylvania, City of Fredericksburg	24 min
Apr 21, 2:10 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	50 min
Apr 21, 2:33 PM EDT	Tornado Warning	LWX	Charles	27 min
Apr 21, 3:03 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	57 min
Apr 21, 3:03 PM EDT	Severe Thunderstorm Warning	LWX	Charles	57 min
Apr 21, 4:16 PM EDT	Severe Thunderstorm Warning	LWX	Howard, Montgomery	59 min
Apr 21, 4:39 PM EDT	Severe Thunderstorm Warning	LWX	Prince George's	36 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2000 Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.