Alert archive / Maryland / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 37, NWS Philadelphia/Mount Holly

June 24, 2013Cecil County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 24, 2013, 2:18 PM EDT for Cecil County, Maryland. It was in force for 57 min. 2 reports 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
Jun 24, 2013, 2:18 PM EDT (18:18 UTC)
Expired
Jun 24, 2013, 3:15 PM EDT
In force
57 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

County Cecil County, MD

The radar

The Dover AFB radar (KDOX), 101 km from the middle of the area, began a volume at 18:21 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
Jun 24, 2:50 PM EDTTSTM WND DMGAndora, MDMULTIPLE TREES DOWN AND SOME TREES SNAPPED IN HALF...SOME AUTOS DAMAGED BY TREES FALLING ON THEM.
Jun 24, 3:04 PM EDTTSTM WND DMG2 Nnw Elkton, MDSEVERAL TREES DOWN ALONG WARBURTON ROAD... WHEATLEY ROAD... BLUE BALL ROAD... AND OLD ELM ROAD. ALSO PEA SIZE HAIL REPORTED.

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.3 hours before the alert went out and 26 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 2013-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 705 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 2013-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.193958Sfc1 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
705 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
1279 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

301 
WUUS51 KPHI 241818
SVRPHI
MDC015-241915-
/O.NEW.KPHI.SV.W.0037.130624T1818Z-130624T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
218 PM EDT MON JUN 24 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CECIL COUNTY IN NORTHEAST MARYLAND...

* UNTIL 315 PM EDT

* AT 216 PM EDT...A SEVERE THUNDERSTORM WAS DETECTED BY NWS DOPPLER  
  RADAR IN NORTHERN CECIL COUNTY NEAR CHERRY HILL.  THIS STORM WAS   
  MOVING SLOWLY EAST-SOUTHEAST AT 10 MPH. THIS STORM IS CAPABLE OF   
  PRODUCING DAMAGING WIND GUSTS...HAIL...AND VERY HEAVY RAIN. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ZION...PLEASANT HILL...NORTH EAST...LOMBARD...GLEN WESTOVER...
  FARMINGTON...FAIR HILL...ELKTON...CHERRY HILL...CALVERT...
  BRANTWOOD...BLAKE...BAY VIEW...BARKSDALE...APPLETON AND ANDORA

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CREATE WINDS OF MORE THAN 57 MPH...OR HAIL ONE
INCH OR LARGER.

&&

LAT...LON 3972 7580 3954 7578 3959 7603 3965 7606
      3972 7604
TIME...MOT...LOC 1817Z 308DEG 14KT 3967 7585

$$

FORECASTER:JJM
1 follow-up statement
151 
WWUS51 KPHI 241849
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
249 PM EDT MON JUN 24 2013

MDC015-241915-
/O.CON.KPHI.SV.W.0037.000000T0000Z-130624T1915Z/
CECIL MD-
249 PM EDT MON JUN 24 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR NORTHEASTERN CECIL COUNTY...

AT 243 PM EDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH 
DIAMETER HAIL WAS DETECTED BY NATIONAL WEATHER SERVICE DOPPLER RADAR. 
THIS STORM WAS LOCATED NEAR PLEASANT HILL...OR 9 MILES WEST OF 
NEWARK...MOVING EAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ZION...
PLEASANT HILL...NORTH EAST...LOMBARD...FAIR HILL...ELKTON...CHERRY
HILL...BRANTWOOD...BLAKE...BAY VIEW...BARKSDALE...APPLETON AND ANDORA

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS 
IMMEDIATELY! HEAVY RAIN IS ALSO OCCURRING WITH THIS STORM...PRODUCING 
PONDING OF WATER ON ROADWAYS. GUSTY WINDS ARE ALSO 
POSSIBLE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
MONDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY
AND EASTERN PENNSYLVANIA.

&&

LAT...LON 3964 7602 3972 7596 3972 7580 3955 7578
      3954 7579 3962 7603
TIME...MOT...LOC 1847Z 272DEG 28KT 3965 7589

$$

FORECASTER:JJM

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 24, 1:22 PM EDTSevere Thunderstorm WarningPHICecil53 min
Jun 24, 2:07 PM EDTAreal Flood AdvisoryPHICecil3 hr
Jun 24, 3:23 PM EDTSpecial Weather StatementPHICecil52 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2013Every severe thunderstorm warning in 2013

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.