Alert archive / Delaware / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 69, NWS Philadelphia/Mount Holly

June 21, 2016Kent County, Sussex County, Delaware; Caroline County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 21, 2016, 7:20 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Queen Anne'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 outline as issued.

The facts

Issued
Jun 21, 2016, 7:20 PM EDT (23:20 UTC)
Expired
Jun 21, 2016, 8:00 PM EDT
In force
40 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

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

The radar

The Dover AFB radar (KDOX), 9 km from the middle of the area, began a volume at 23:20 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, 11.3 hours before the alert went out and 86 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.

159 
WUUS51 KPHI 212320
SVRPHI
DEC001-005-MDC011-035-220000-
/O.NEW.KPHI.SV.W.0069.160621T2320Z-160622T0000Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN KENT COUNTY IN CENTRAL DELAWARE...
  SUSSEX COUNTY IN SOUTHERN DELAWARE...
  SOUTHEASTERN QUEEN ANNE'S COUNTY IN NORTHEASTERN MARYLAND...
  CAROLINE COUNTY IN EASTERN MARYLAND...

* UNTIL 800 PM EDT

* AT 719 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR CHURCH HILL TO GREENSBORO TO NEAR GUMBORO...
  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...GEORGETOWN...MILFORD...SEAFORD...DENTON...MILLSBORO...
  LAUREL...HARRINGTON...CAMDEN...LEWES...FEDERALSBURG...MILTON...
  BRIDGEVILLE...GREENSBORO...OAKLAND...RIDGELY...DAGSBORO...
  MILLVILLE...ELLENDALE AND BOWERS.

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 3850 7551 3869 7577 3874 7590 3880 7593
      3882 7590 3888 7595 3892 7595 3893 7598
      3912 7606 3913 7537 3905 7537 3893 7529
      3881 7514 3881 7507 3895 7499 3893 7497
      3846 7504
TIME...MOT...LOC 2319Z 270DEG 43KT 3911 7591 3896 7579 3854 7538 

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

ROBERTSON
1 follow-up statement
445 
WWUS51 KPHI 212345 RRA
SVSPHI

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

MDC011-035-212354-
/O.CAN.KPHI.SV.W.0069.000000T0000Z-160622T0000Z/
QUEEN ANNE'S MD-CAROLINE MD-
745 PM EDT TUE JUN 21 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN QUEEN ANNE'S AND
CAROLINE COUNTIES IS CANCELLED...

THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE WARNED
AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FOR
SOUTHERN AND CENTRAL DELAWARE.

LAT...LON 3912 7562 3913 7537 3905 7537 3893 7529
      3881 7514 3881 7507 3895 7499 3893 7497
      3892 7500 3847 7504 3847 7508
TIME...MOT...LOC 2344Z 270DEG 43KT 3911 7554 3896 7542 3854 7501 

$$

DEC001-005-220000-
/O.CON.KPHI.SV.W.0069.000000T0000Z-160622T0000Z/
KENT DE-SUSSEX DE-
745 PM EDT TUE JUN 21 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR SOUTHEASTERN KENT AND NORTHEASTERN SUSSEX COUNTIES...

AT 744 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM CAMDEN TO NEAR MILFORD TO NEAR MILLVILLE...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...MILFORD...CAMDEN...LEWES...MILTON...MILLVILLE...BOWERS...
WOODSIDE...HENLOPEN ACRES...DOVER BASE HOUSING...
RISING SUN-LEBANON...CAPE HENLOPEN STATE PARK...RISING SUN...
LONG NECK...OCEAN VIEW...WYOMING...FREDERICA...SOUTH BETHANY...
DEWEY BEACH AND MAGNOLIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3912 7562 3913 7537 3905 7537 3893 7529
      3881 7514 3881 7507 3895 7499 3893 7497
      3892 7500 3847 7504 3847 7508
TIME...MOT...LOC 2344Z 270DEG 43KT 3911 7554 3896 7542 3854 7501 

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 StatementPHIKent, Sussex83 min
Jun 21, 1:52 PM EDTSevere Thunderstorm WarningPHINew Castle53 min
Jun 21, 2:17 PM EDTSevere Thunderstorm WarningPHIKent, New Castle58 min
Jun 21, 2:51 PM EDTSevere Thunderstorm WarningPHIKent, Sussex54 min
Jun 21, 2:55 PM EDTSevere Thunderstorm WarningPHIKent, Sussex65 min
Jun 21, 3:36 PM EDTSevere Thunderstorm WarningPHIKent, Sussex54 min
Jun 21, 3:52 PM EDTSevere Thunderstorm WarningPHISussex53 min
Jun 21, 4:28 PM EDTSpecial Weather StatementPHISussex62 min
Jun 21, 6:36 PM EDTSevere Thunderstorm WarningPHIKent, New Castle, Sussex54 min
Jun 21, 2:08 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's, Talbot67 min
Jun 21, 2:32 PM EDTTornado WarningPHIKent, Queen Anne's, Talbot28 min

Nearby

Severe Thunderstorm Warnings in Delaware, 2016Severe Thunderstorm Warnings in Maryland, 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.