Alert archive / Maryland / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 201, NWS Baltimore/Washington

August 18, 2009Baltimore County, Carroll County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Aug 18, 2009, 5:25 PM EDT for Baltimore County, Carroll County, Maryland. It was in force for 50 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: Aug 18, 2009, 5:25 PM EDT (21:25 UTC)
Expired: Aug 18, 2009, 6:15 PM EDT
In force: 50 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon

Counties Baltimore County, MD, Carroll County, MD

The radar

The Sterling radar (KLWX), 82 km from the middle of the area, began a volume at 21:25 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.

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 Aug 18, 2:59 PM EDT, 2 hours 26 minutes earlier.

Area forecast discussion, Aug 18, 2:59 PM EDT, 2 hours 26 minutes before

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Hazardous weather outlook, Aug 18, 2:57 PM EDT, 2 hours 28 minutes before

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In the hours before

Special weather statement, Aug 18, 3:22 PM EDT, 2 hours 3 minutes before

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Special weather statement, Aug 18, 5:03 PM EDT, 22 minutes before

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Special weather statement, Aug 18, 5:17 PM EDT, 8 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 10:06 PM EDT	Flash Flood Warning	LWX	Shenandoah	2 hr
Aug 18, 5:00 PM EDT	Special Marine Warning	LWX		57 min
Aug 18, 5:21 PM EDT	Special Marine Warning	LWX		84 min
Aug 18, 6:24 PM EDT	Special Marine Warning	LWX		41 min
Aug 18, 7:51 PM EDT	Special Marine Warning	LWX		80 min
Aug 18, 5:10 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	32 min
Aug 18, 5:28 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford, City of Baltimore	47 min
Aug 18, 6:15 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	37 min
Aug 18, 7:54 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	36 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2009 Every severe thunderstorm warning in 2009

Sources

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