Alert archive / Maryland / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 110, NWS Baltimore/Washington

June 10, 2018Calvert County, Saint Mary's County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 10, 2018, 7:09 PM EDT for Calvert County, Saint Mary's County, Maryland. It was in force for 40 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 10, 2018, 7:09 PM EDT (23:09 UTC)
Expired: Jun 10, 2018, 7:49 PM EDT
In force: 40 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Calvert County, MD, Saint Mary's County, MD

The radar

The Sterling radar (KLWX), 107 km from the middle of the area, began a volume at 23:12 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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.2 hours before the alert went out and 111 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: 61 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 675 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 10, 3:35 PM EDT, 3 hours 34 minutes earlier.

Area forecast discussion, Jun 10, 3:35 PM EDT, 3 hours 34 minutes before

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Hazardous weather outlook, Jun 10, 10:35 AM EDT, 8 hours 34 minutes before

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In the hours before

Local storm report, Jun 10, 4:53 PM EDT, 2 hours 16 minutes before

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Local storm report, Jun 10, 4:59 PM EDT, 2 hours 10 minutes before

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Local storm report, Jun 10, 5:20 PM EDT, 1 hour 49 minutes before

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Local storm report, Jun 10, 5:22 PM EDT, 1 hour 47 minutes before

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Local storm report, Jun 10, 5:29 PM EDT, 1 hour 40 minutes before

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Local storm report, Jun 10, 5:35 PM EDT, 1 hour 34 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
Jun 9, 9:26 PM EDT	Areal Flood Warning	LWX	Prince William, City of Manassas	100 min
Jun 9, 9:59 PM EDT	Areal Flood Warning	LWX	Spotsylvania	3 hr
Jun 10, 3:47 AM EDT	Flash Flood Watch	LWX	Arlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 18 more	24 hr
Jun 10, 2:40 PM EDT	Severe Thunderstorm Warning	LWX	Augusta, Rockingham, City of Harrisonburg	35 min
Jun 10, 3:17 PM EDT	Areal Flood Warning	LWX	Rockingham, City of Harrisonburg	5 hr
Jun 10, 3:33 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, City of Charlottesville	42 min
Jun 10, 4:01 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, City of Charlottesville	44 min
Jun 10, 4:06 PM EDT	Areal Flood Warning	LWX	Albemarle, Augusta, City of Charlottesville	4 hr
Jun 10, 4:37 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Augusta, City of Charlottesville	42 min
Jun 10, 6:05 PM EDT	Special Marine Warning	LWX		102 min
Jun 10, 6:27 PM EDT	Special Marine Warning	LWX		38 min
Jun 10, 7:02 PM EDT	Special Marine Warning	LWX		88 min
Jun 10, 4:33 PM EDT	Areal Flood Warning	LWX	Baltimore, Carroll, Howard	2 hr
Jun 10, 2:12 PM EDT	River Flood Watch	LWX	Berkeley, Jefferson	20 hr

Nearby

Severe Thunderstorm Warnings in Maryland, 2018 Every severe thunderstorm warning in 2018

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.