Alert archive / Maryland / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 101, NWS Baltimore/Washington

May 23, 2019Saint Mary's County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at May 23, 2019, 5:27 PM EDT for Saint Mary's County, Maryland. It was in force for 18 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: May 23, 2019, 5:27 PM EDT (21:27 UTC)
Expired: May 23, 2019, 5:45 PM EDT
In force: 18 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Saint Mary's County, MD

The radar

The Dover AFB radar (KDOX), 116 km from the middle of the area, began a volume at 21:30 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.

Issued	Product	Office	Lasted
May 23, 1:02 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.5 hours before the alert went out and 104 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: 1760 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 269 m²/s²
0-3 km storm-relative helicity: 313 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 May 23, 2:46 PM EDT, 2 hours 41 minutes earlier.

Area forecast discussion, May 23, 2:46 PM EDT, 2 hours 41 minutes before

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Hazardous weather outlook, May 23, 5:04 PM EDT, 23 minutes before

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In the hours before

Local storm report, May 23, 5:15 PM EDT, 12 minutes before

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Local storm report, May 23, 5:19 PM EDT, 8 minutes before

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Local storm report, May 23, 5:20 PM EDT, 7 minutes before

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Local storm report, May 23, 5:21 PM EDT, 6 minutes before

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Local storm report, May 23, 5:23 PM EDT, 4 minutes before

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Local storm report, May 23, 5:24 PM EDT, 3 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
May 23, 4:30 AM EDT	Small Craft Advisory	LWX		40 hr
May 23, 2:26 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Loudoun	34 min
May 23, 2:30 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Fauquier, Page, Rappahannock, Warren	45 min
May 23, 2:42 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Greene, Madison, Page, Rappahannock, Rockingham	48 min
May 23, 2:56 PM EDT	Severe Thunderstorm Warning	LWX	Loudoun	34 min
May 23, 3:07 PM EDT	Special Marine Warning	LWX		71 min
May 23, 3:07 PM EDT	Special Marine Warning	LWX		83 min
May 23, 3:11 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Fairfax, Fauquier, Loudoun, Prince William, Stafford and 4 more	34 min
May 23, 3:27 PM EDT	Special Marine Warning	LWX		93 min
May 23, 3:28 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Fauquier, Greene, Madison, Orange, Prince William and 3 more	32 min
May 23, 3:36 PM EDT	Severe Thunderstorm Warning	LWX	Arlington, Fairfax, Prince William, City of Alexandria, City of Falls Church	39 min
May 23, 3:42 PM EDT	Special Marine Warning	LWX		93 min
May 23, 3:47 PM EDT	Tornado Warning	LWX	Arlington, City of Alexandria	11 min
May 23, 3:55 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Culpeper, Fauquier, King George, Orange, Prince William and 3 more	65 min
May 23, 4:19 PM EDT	Special Marine Warning	LWX		86 min
May 23, 4:52 PM EDT	Special Marine Warning	LWX		28 min
May 23, 5:13 PM EDT	Special Marine Warning	LWX		62 min
May 23, 5:30 PM EDT	Special Marine Warning	LWX		30 min
May 23, 1:41 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	37 min
May 23, 2:12 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	18 min
May 23, 2:42 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	33 min
May 23, 3:21 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore	39 min
May 23, 3:30 PM EDT	Tornado Warning	LWX	Howard	30 min
May 23, 3:58 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Prince George's, City of Baltimore	32 min
May 23, 4:10 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's	50 min
May 23, 4:30 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	15 min
May 23, 4:42 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	48 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2019 Every severe thunderstorm warning in 2019

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.