Alert archive / Maryland / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 41, NWS Wakefield, VA

May 13, 2018Dorchester County, Maryland

NWS Wakefield, VA issued this severe thunderstorm warning at May 13, 2018, 11:19 PM EDT for Dorchester County, Maryland. It was in force for 26 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 13, 2018, 11:19 PM EDT (03:19 UTC)
Expired: May 13, 2018, 11:45 PM EDT
In force: 26 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

County Dorchester County, MD

The radar

The Dover AFB radar (KDOX), 72 km from the middle of the area, began a volume at 03:22 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 00:00Z, 3.3 hours before the alert went out and 81 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: 668 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 284 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 Wakefield, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 13, 9:27 PM EDT, 1 hour 52 minutes earlier.

Area forecast discussion, May 13, 9:27 PM EDT, 1 hour 52 minutes before

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Hazardous weather outlook, May 13, 10:17 PM EDT, 1 hour 2 minutes before

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In the hours before

Special weather statement, May 13, 7:29 PM EDT, 3 hours 50 minutes before

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Special weather statement, May 13, 11:03 PM EDT, 16 minutes before

Special Weather Statement
National Weather Service Wakefield VA
1103 PM EDT SUN MAY 13 2018

MDZ021-140330-
Dorchester-
1103 PM EDT SUN MAY 13 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN DORCHESTER
COUNTY...

At 1102 PM EDT, a strong thunderstorm was located near University of
Maryland Center For Environmental Studies...or 7 miles northeast of
Taylors Island, moving east at 25 mph.

Wind gusts in excess of 30 mph and half inch hail are possible with
this storm.

This storm will be near...
  University Of Maryland Center For Environmental Studies around
  1115 PM EDT.
  Cambridge around 1120 PM EDT.
  Secretary around 1130 PM EDT.

Other locations impacted by this storm include Taylors Island...
Woolford...Hudson...Church Creek...Bucktown...Lloyds and Madison.

If you see lightning or hear thunder...you are at risk. Take shelter
indoors immediately. If you cannot find shelter in a building a
vehicle provides safety from lightning.

LAT...LON 3866 7592 3836 7601 3846 7632 3850 7633
      3849 7627 3851 7621 3854 7622 3853 7620
      3856 7621 3854 7628 3857 7631 3860 7626
      3862 7628 3863 7624 3860 7621 3863 7617
      3859 7616 3857 7603 3866 7596
TIME...MOT...LOC 0302Z 280DEG 24KT 3856 7623

Zimmerman

The office that day

Everything else NWS Wakefield, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 14, 12:19 AM EDT	Marine Dense Fog Advisory	AKQ		7 hr
May 14, 3:41 PM EDT	Small Craft Advisory	AKQ		30 hr
May 14, 6:18 PM EDT	Severe Thunderstorm Warning	AKQ	Fluvanna, Goochland, Louisa	42 min
May 14, 7:02 PM EDT	Severe Thunderstorm Warning	AKQ	Caroline, Fluvanna, Goochland, Hanover, Louisa	43 min
May 14, 7:10 PM EDT	Severe Thunderstorm Warning	AKQ	Caroline, Essex, King and Queen, Richmond, Westmoreland	35 min
May 14, 7:30 PM EDT	Severe Thunderstorm Warning	AKQ	Amelia, Caroline, Chesterfield, Cumberland, Essex, Goochland and 7 more	45 min
May 14, 7:33 PM EDT	Severe Thunderstorm Warning	AKQ	Essex, Westmoreland	27 min
May 14, 7:43 PM EDT	Severe Thunderstorm Warning	AKQ	Essex, Lancaster, Middlesex, Northumberland, Richmond, Westmoreland	47 min
May 14, 7:47 PM EDT	Severe Thunderstorm Warning	AKQ	Charles City, Chesterfield, Dinwiddie, Essex, Gloucester, Hanover and 13 more	43 min
May 14, 7:52 PM EDT	Special Marine Warning	AKQ		113 min
May 13, 11:03 PM EDT	Special Weather Statement	AKQ	Dorchester	27 min
May 14, 2:12 AM EDT	Special Weather Statement	AKQ	Wicomico, Worcester	63 min

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.