Alert archive / Maryland / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 110, NWS Baltimore/Washington

June 19, 20174 counties in Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 19, 2017, 4:00 PM EDT for 4 counties in Maryland. It was in force for 45 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
Jun 19, 2017, 4:00 PM EDT (20:00 UTC)
Expired
Jun 19, 2017, 4:45 PM EDT
In force
45 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Anne Arundel County, MD, City of Baltimore, MD, Howard County, MD, Prince George's County, MD

The radar

The Sterling radar (KLWX), 66 km from the middle of the area, began a volume at 20:03 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 19, 12:48 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.0 hours before the alert went out and 59 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-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2017-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 448 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2017-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
448 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
1049 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

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 Jun 19, 2:50 PM EDT, 1 hour 10 minutes earlier.

Area forecast discussion, Jun 19, 2:50 PM EDT, 1 hour 10 minutes before
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Hazardous weather outlook, Jun 19, 2:52 PM EDT, 1 hour 8 minutes before
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In the hours before

Local storm report, Jun 19, 2:57 PM EDT, 1 hour 3 minutes before
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Local storm report, Jun 19, 2:58 PM EDT, 1 hour 2 minutes before
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Local storm report, Jun 19, 3:28 PM EDT, 32 minutes before
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Local storm report, Jun 19, 3:42 PM EDT, 18 minutes before
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      <h1 id="headline">This service is currently unavailable.</h1>
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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Jun 19, 3:49 PM EDT, 11 minutes before
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<body>
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      <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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      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 4:09 AM EDTFlash Flood WatchLWXArlington, Culpeper, Fairfax, Fauquier, Greene, Loudoun and 11 more14 hr
Jun 19, 12:59 PM EDTSevere Thunderstorm WarningLWXLoudoun46 min
Jun 19, 1:10 PM EDTFlash Flood WarningLWXNelson5 hr
Jun 19, 1:49 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Nelson29 min
Jun 19, 1:54 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Greene, Madison, Page, Rockingham51 min
Jun 19, 2:00 PM EDTSevere Thunderstorm WarningLWXClarke, Fauquier, Frederick, Loudoun, Warren25 min
Jun 19, 2:07 PM EDTSevere Thunderstorm WarningLWXLoudoun38 min
Jun 19, 2:17 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Madison, Rappahannock43 min
Jun 19, 2:18 PM EDTAreal Flood WarningLWXAlbemarle, Greene, Madison, Page, Rockingham4 hr
Jun 19, 2:29 PM EDTSpecial Marine WarningLWX91 min
Jun 19, 2:37 PM EDTFlash Flood WarningLWXAlbemarle3 hr
Jun 19, 2:44 PM EDTFlash Flood WarningLWXAlbemarle, Greene, Madison3 hr
Jun 19, 2:45 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fairfax, Fauquier, Loudoun, Prince William, Rappahannock and 3 more45 min
Jun 19, 2:50 PM EDTSpecial Marine WarningLWX115 min
Jun 19, 2:57 PM EDTSpecial Marine WarningLWX2 hr
Jun 19, 3:00 PM EDTSevere Thunderstorm WarningLWXLoudoun45 min
Jun 19, 3:19 PM EDTSevere Thunderstorm WarningLWXArlington, Fairfax, Loudoun, City of Alexandria, City of Fairfax, City of Falls Church41 min
Jun 19, 3:28 PM EDTSpecial Marine WarningLWX92 min
Jun 19, 4:08 PM EDTSpecial Marine WarningLWX2 hr
Jun 19, 4:13 PM EDTSpecial Marine WarningLWX2 hr
Jun 19, 4:55 PM EDTSpecial Marine WarningLWX65 min
Jun 19, 5:16 PM EDTSpecial Marine WarningLWX89 min
Jun 19, 5:58 PM EDTSpecial Marine WarningLWX92 min
Jun 19, 6:27 PM EDTSpecial Marine WarningLWX2 hr
Jun 19, 6:45 PM EDTSpecial Marine WarningLWX2 hr
Jun 19, 12:50 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington40 min
Jun 19, 1:41 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick, Washington49 min
Jun 19, 4:49 PM EDTSevere Thunderstorm WarningLWXCalvert, Charles, Saint Mary's41 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2017Every severe thunderstorm warning in 2017

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.