Alert archive / Maryland / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 129, NWS Philadelphia/Mount Holly

July 14, 2014Caroline County, Kent County, Queen Anne's County, Maryland; Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2014, 7:49 PM EDT for Caroline County, Kent County, Queen Anne's County, Maryland; Kent County, Sussex County, Delaware. It was in force for 51 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
Jul 14, 2014, 7:49 PM EDT (23:49 UTC)
Expired
Jul 14, 2014, 8:40 PM EDT
In force
51 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

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

The radar

The Dover AFB radar (KDOX), 5 km from the middle of the area, began a volume at 23:50 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
Jul 14, 1:24 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.8 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 2014-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 483 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 2014-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 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
483 J/kg
Mixed-layer CIN
-85 J/kg
Mixed-layer LCL
844 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

588 
WUUS51 KPHI 142349
SVRPHI
DEC001-005-MDC011-029-035-150100-
/O.NEW.KPHI.SV.W.0129.140714T2349Z-140715T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
749 PM EDT MON JUL 14 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 900 PM EDT

* AT 747 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM OLD
  TOWN TO DENTON TO LINKWOOD...MOVING EAST AT 35 MPH. THESE STORMS
  ARE CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  GREENSBORO AND AGNER AROUND 755 PM EDT...
  CRUMPTON AND GOLDSBORO AROUND 800 PM EDT...
  SUDLERSVILLE AND MILLINGTON AROUND 805 PM EDT...
  HARRINGTON AROUND 810 PM EDT...
  BRIDGEVILLE AROUND 815 PM EDT...
  HARTLY AND VIOLA AROUND 820 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

VERY HEAVY RAIN WILL ALSO OCCUR WITH THIS LINE OF SEVERE
THUNDERSTORMS...WHICH COULD FLOOD LOW LYING AREAS QUICKLY AND COVER
ROADS WITH WATER. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE
ROAD.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS LINE OF
SEVERE THUNDERSTORMS. WHEN THUNDER ROARS...MOVE INDOORS! REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT MONDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
SOUTHEAST PENNSYLVANIA.

&&

LAT...LON 3846 7569 3863 7571 3868 7576 3867 7579
      3892 7579 3925 7621 3932 7544 3921 7538
      3915 7540 3906 7539 3901 7532 3893 7530
      3893 7532 3881 7518 3879 7515 3880 7508
      3845 7504
TIME...MOT...LOC 2348Z 268DEG 30KT 3916 7604 3891 7580
          3857 7596

$$

FORECASTER:  SZATKOWSKI
1 follow-up statement
823 
WWUS51 KPHI 150040
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
840 PM EDT MON JUL 14 2014

DEC001-005-MDC011-029-035-150050-
/O.CAN.KPHI.SV.W.0129.000000T0000Z-140715T0100Z/
KENT MD-KENT DE-CAROLINE MD-SUSSEX DE-QUEEN ANNE'S MD-
840 PM EDT MON JUL 14 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN QUEEN ANNE'S...
SUSSEX...EASTERN CAROLINE...KENT AND CENTRAL KENT COUNTIES IS
CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT MONDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
SOUTHEAST PENNSYLVANIA.

LAT...LON 3846 7569 3863 7571 3868 7576 3867 7579
      3892 7579 3925 7621 3932 7544 3921 7538
      3915 7540 3906 7539 3901 7532 3893 7530
      3893 7532 3881 7518 3879 7515 3880 7508
      3845 7504
TIME...MOT...LOC 0040Z 268DEG 30KT 3918 7548 3892 7524
          3858 7541

$$

SZATKOWSKI

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 9:26 PM EDTSpecial Weather StatementPHICecil, Kent64 min
Jul 13, 10:02 PM EDTSpecial Weather StatementPHICecil, Kent, Queen Anne's58 min
Jul 13, 10:14 PM EDTSevere Thunderstorm WarningPHICecil, Kent46 min
Jul 13, 10:48 PM EDTSevere Thunderstorm WarningPHICaroline, Cecil, Kent, Queen Anne's37 min
Jul 14, 3:54 AM EDTFlash Flood WatchPHICaroline, Cecil, Kent, Queen Anne's, Talbot45 hr
Jul 14, 6:04 PM EDTSpecial Weather StatementPHICaroline, Cecil, Kent, Queen Anne's56 min
Jul 14, 6:28 PM EDTSevere Thunderstorm WarningPHICaroline, Cecil, Kent, Queen Anne's62 min
Jul 14, 7:16 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot74 min
Jul 14, 7:03 PM EDTSevere Thunderstorm WarningPHIKent, New Castle42 min
Jul 14, 7:29 PM EDTSevere Thunderstorm WarningPHINew Castle46 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2014Severe Thunderstorm Warnings in Delaware, 2014Every severe thunderstorm warning in 2014

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.