Alert archive / Maryland / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 115, NWS Philadelphia/Mount Holly

July 18, 2016Kent County, New Castle County, Delaware; Caroline County, Kent County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 18, 2016, 5:18 PM EDT for Kent County, New Castle County, Delaware; Caroline County, Kent County, Queen Anne's County, Maryland. It was in force for 57 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 18, 2016, 5:18 PM EDT (21:18 UTC)
Expired
Jul 18, 2016, 6:15 PM EDT
In force
57 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

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

The radar

The Dover AFB radar (KDOX), 50 km from the middle of the area, began a volume at 21:20 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.

What was reported inside it

TimeReportWhereRemark
Jul 18, 5:30 PM EDTTSTM WND DMG2 S Hartly, DEA FEW TREES DOWN. TIMES ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 18, 1:42 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.3 hours before the alert went out and 149 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, Wallops Is Stn, VA at 12:00Z on 2016-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 726 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, Wallops Is Stn, VA at 12:00Z on 2016-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.1939Sfc1 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
726 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
1135 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
0 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

096 
WUUS51 KPHI 182118
SVRPHI
DEC001-003-MDC011-029-035-182215-
/O.NEW.KPHI.SV.W.0115.160718T2118Z-160718T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
518 PM EDT MON JUL 18 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  NORTHERN KENT COUNTY IN CENTRAL DELAWARE...
  NORTHEASTERN QUEEN ANNE'S COUNTY IN NORTHEASTERN MARYLAND...
  NORTHEASTERN CAROLINE COUNTY IN EASTERN MARYLAND...
  EAST CENTRAL KENT COUNTY IN NORTHEASTERN MARYLAND...

* UNTIL 615 PM EDT

* AT 517 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
  SUDLERSVILLE... OR 15 MILES NORTHEAST OF CENTERVILLE...MOVING EAST
  AT 35 MPH.

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

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  DOVER...SMYRNA...CAMDEN...CLAYTON...CHESWOLD...MILLINGTON...
  SUDLERSVILLE...BOWERS...GOLDSBORO...WOODSIDE...VIOLA...HARTLY...
  DELANEY CORNER...RISING SUN...HAZLETTVILLE...DOVER SPEEDWAY...
  WOODLAND BEACH...GREEN SPRING...DOVER BASE HOUSING AND CRUMPTON.

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 3926 7594 3936 7547 3935 7546 3937 7543
      3936 7543 3935 7544 3935 7545 3931 7541
      3914 7537 3905 7537 3903 7591
TIME...MOT...LOC 2117Z 264DEG 29KT 3918 7583 

HAIL...0.75IN
WIND...60MPH
 
$$

PO
1 follow-up statement
854 
WWUS51 KPHI 182142
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
542 PM EDT MON JUL 18 2016

MDC011-029-035-182152-
/O.CAN.KPHI.SV.W.0115.000000T0000Z-160718T2215Z/
QUEEN ANNE'S MD-CAROLINE MD-KENT MD-
542 PM EDT MON JUL 18 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN QUEEN ANNE'S...
NORTHEASTERN CAROLINE AND EAST CENTRAL KENT COUNTIES IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA...THEREFORE THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FOR
NORTHERN AND CENTRAL DELAWARE...AND EASTERN MARYLAND.

LAT...LON 3930 7570 3936 7547 3935 7546 3937 7543
      3936 7543 3935 7545 3931 7541 3914 7537
      3905 7537 3904 7574 3907 7574
TIME...MOT...LOC 2142Z 268DEG 38KT 3922 7553 

$$

DEC001-003-182215-
/O.CON.KPHI.SV.W.0115.000000T0000Z-160718T2215Z/
NEW CASTLE DE-KENT DE-
542 PM EDT MON JUL 18 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTH CENTRAL NEW CASTLE AND CENTRAL KENT COUNTIES...

AT 542 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER DOVER
SPEEDWAY... OR NEAR DOVER...MOVING EAST AT 45 MPH.

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

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
DOVER...SMYRNA...CAMDEN...CLAYTON...CHESWOLD...BOWERS...WOODSIDE...
VIOLA...HARTLY...DOVER SPEEDWAY...WOODLAND BEACH...
DOVER BASE HOUSING...RISING SUN-LEBANON...RISING SUN...
HAZLETTVILLE...WYOMING...KENTON...MAGNOLIA...
LITTLE CREEK AND LEIPSIC.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3930 7570 3936 7547 3935 7546 3937 7543
      3936 7543 3935 7545 3931 7541 3914 7537
      3905 7537 3904 7574 3907 7574
TIME...MOT...LOC 2142Z 268DEG 38KT 3922 7553 

HAIL...0.75IN
WIND...60MPH
 
$$

PO

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 4:04 PM EDTSpecial Weather StatementPHINew Castle56 min
Jul 18, 4:14 PM EDTSevere Thunderstorm WarningPHINew Castle46 min
Jul 18, 4:15 PM EDTAreal Flood AdvisoryPHINew Castle2 hr
Jul 18, 4:37 PM EDTSevere Thunderstorm WarningPHIKent, New Castle38 min
Jul 18, 5:22 PM EDTSpecial Weather StatementPHINew Castle53 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.