Alert archive / Maryland / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 68, NWS Philadelphia/Mount Holly

June 21, 20164 counties in Maryland; Kent County, New Castle County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 21, 2016, 6:36 PM EDT for 4 counties in Maryland; Kent County, New Castle County, Sussex County, Delaware. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 21, 2016, 6:36 PM EDT (22:36 UTC)
Expired
Jun 21, 2016, 7:30 PM EDT
In force
54 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 61 km from the middle of the area, began a volume at 22:40 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 21, 1:06 PM EDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.6 hours before the alert went out and 64 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, Phillips Aaf/Abe, MD at 12:00Z on 2016-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1292 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2016-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 square meters per square second.19395878Sfc1 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
1292 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
1267 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

Open this sounding in Storm Lab

The text

As transmitted.

826 
WUUS51 KPHI 212236
SVRPHI
DEC001-003-005-MDC011-029-035-041-212330-
/O.NEW.KPHI.SV.W.0068.160621T2236Z-160621T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
636 PM EDT TUE JUN 21 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  KENT COUNTY IN CENTRAL DELAWARE...
  NORTHWESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...
  KENT COUNTY IN NORTHEASTERN MARYLAND...
  TALBOT COUNTY IN EASTERN MARYLAND...
  QUEEN ANNE'S COUNTY IN NORTHEASTERN MARYLAND...
  CAROLINE COUNTY IN EASTERN MARYLAND...

* UNTIL 730 PM EDT

* AT 636 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM SOUTH GATE TO SOUTH RIVER TO NEAR TILGHMAN ISLAND...
  MOVING EAST AT 50 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  DOVER...EASTON...GEORGETOWN...CENTERVILLE...TALBOT...MILFORD...
  SEAFORD...CHESTERTOWN...DENTON...CENTREVILLE...HARRINGTON...
  CAMDEN...FEDERALSBURG...BRIDGEVILLE...GREENSBORO...OAKLAND...
  RIDGELY...ROCK HALL...TRAPPE AND ST. MICHAELS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3896 7631 3884 7637 3892 7637 3904 7631
      3902 7621 3900 7617 3903 7622 3917 7628
      3928 7620 3939 7571 3871 7529 3861 7571
      3870 7590 3857 7602 3876 7622 3871 7628
      3878 7629 3876 7632 3867 7634
TIME...MOT...LOC 2236Z 258DEG 45KT 3913 7660 3892 7647 3871 7635 

HAIL...1.00IN
WIND...60MPH
 
$$

ROBERTSON
1 follow-up statement
286 
WWUS51 KPHI 212305
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
705 PM EDT TUE JUN 21 2016

DEC001-003-005-MDC011-029-035-041-212330-
/O.CON.KPHI.SV.W.0068.000000T0000Z-160621T2330Z/
NEW CASTLE DE-KENT DE-SUSSEX DE-KENT MD-TALBOT MD-QUEEN ANNE'S MD-
CAROLINE MD-
705 PM EDT TUE JUN 21 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHWESTERN NEW CASTLE...KENT...NORTHWESTERN SUSSEX...
SOUTHWESTERN KENT...NORTHEASTERN TALBOT...QUEEN ANNE'S AND CAROLINE
COUNTIES...

AT 705 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM LANGFORD TO NEAR STARR TO NEAR SEAFORD...MOVING EAST
AT 55 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
DOVER...EASTON...GEORGETOWN...CENTERVILLE...MILFORD...SEAFORD...
CHESTERTOWN...DENTON...CENTREVILLE...HARRINGTON...CAMDEN...
FEDERALSBURG...BRIDGEVILLE...GREENSBORO...OAKLAND...RIDGELY...
CHURCH HILL...PRESTON...MILLINGTON AND SUDLERSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3865 7571 3869 7577 3868 7580 3870 7580
      3867 7597 3886 7613 3928 7621 3939 7571
      3871 7529 3861 7570
TIME...MOT...LOC 2305Z 261DEG 48KT 3920 7616 3896 7598 3867 7567 

HAIL...1.00IN
WIND...60MPH
 
$$

ROBERTSON

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 21, 3:37 AM EDTSpecial Weather StatementPHICaroline83 min
Jun 21, 1:52 PM EDTSevere Thunderstorm WarningPHICecil, Kent, Queen Anne's53 min
Jun 21, 2:08 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's, Talbot67 min
Jun 21, 2:17 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's58 min
Jun 21, 2:32 PM EDTTornado WarningPHIKent, Queen Anne's, Talbot28 min
Jun 21, 2:51 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's54 min
Jun 21, 2:55 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot65 min
Jun 21, 3:36 PM EDTSevere Thunderstorm WarningPHICaroline, Talbot54 min
Jun 21, 3:52 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot53 min
Jun 21, 7:20 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's40 min
Jun 21, 4:28 PM EDTSpecial Weather StatementPHISussex62 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2016Severe Thunderstorm Warnings in Delaware, 2016Every severe thunderstorm warning in 2016

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.