Alert archive / Delaware / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 137, NWS Philadelphia/Mount Holly

July 15, 2014Kent County, New Castle County, Delaware; Kent County, Queen Anne's County, Maryland; Cumberland County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 15, 2014, 4:19 PM EDT for Kent County, New Castle County, Delaware; Kent County, Queen Anne's County, Maryland; Cumberland County, New Jersey. It was in force for 56 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 15, 2014, 4:19 PM EDT (20:19 UTC)
Expired: Jul 15, 2014, 5:15 PM EDT
In force: 56 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Dover AFB radar (KDOX), 50 km from the middle of the area, began a volume at 20:18 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.

Issued	Product	Office	Lasted
Jul 15, 1:43 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.3 hours before the alert went out and 56 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1120 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 730 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

912 
WUUS51 KPHI 152019
SVRPHI
DEC001-003-MDC029-035-NJC011-152115-
/O.NEW.KPHI.SV.W.0137.140715T2019Z-140715T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
419 PM EDT TUE JUL 15 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  EAST CENTRAL KENT COUNTY IN NORTHEAST MARYLAND...
  NORTHERN KENT COUNTY IN CENTRAL DELAWARE...
  NORTHEASTERN QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
  WESTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 515 PM EDT

* AT 416 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR CHURCH HILL...MOVING EAST
  AT 35 MPH. THIS STORM IS CAPABLE OF PRODUCING ONE INCH DIAMETER
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SUDLERSVILLE AROUND 425 PM EDT...
  MILLINGTON AND MASSEY AROUND 430 PM EDT...
  HARTLY AROUND 435 PM EDT...
  DELANEY CORNER AROUND 440 PM EDT...
  CHESWOLD AND SMYRNA AROUND 450 PM EDT...
  DOVER SPEEDWAY AND DOVER AROUND 455 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

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

&&

LAT...LON 3927 7604 3940 7552 3936 7548 3940 7541
      3943 7541 3948 7523 3921 7511 3920 7518
      3923 7518 3929 7526 3928 7529 3934 7535
      3926 7540 3917 7540 3912 7575 3914 7575
      3912 7582 3912 7602
TIME...MOT...LOC 2019Z 253DEG 29KT 3917 7591

$$

FORECASTER: HEAVENER

1 follow-up statement

591 
WWUS51 KPHI 152106
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
506 PM EDT TUE JUL 15 2014

MDC029-035-152116-
/O.CAN.KPHI.SV.W.0137.000000T0000Z-140715T2115Z/
KENT MD-QUEEN ANNE'S MD-
506 PM EDT TUE JUL 15 2014

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

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 3940 7552 3933 7545 3937 7540 3938 7542
      3943 7541 3948 7523 3921 7511 3920 7517
      3923 7518 3929 7526 3928 7529 3934 7534
      3936 7541 3932 7544 3927 7540 3918 7539
      3915 7552 3937 7563
TIME...MOT...LOC 2106Z 253DEG 29KT 3928 7544

$$

DEC001-003-NJC011-152115-
/O.CON.KPHI.SV.W.0137.000000T0000Z-140715T2115Z/
NEW CASTLE DE-KENT DE-CUMBERLAND NJ-
506 PM EDT TUE JUL 15 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR WESTERN CUMBERLAND...NORTHEASTERN KENT AND SOUTHEASTERN NEW
CASTLE COUNTIES...

AT 505 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR WOODLAND BEACH...OR 9
MILES NORTHEAST OF DOVER...MOVING EAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  6 MILES SOUTH OF GREENWICH...8 MILES WEST OF CEDARVILLE AND 9 MILES
  SOUTHWEST OF FAIRTON BY 515 PM EDT...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 3940 7552 3933 7545 3937 7540 3938 7542
      3943 7541 3948 7523 3921 7511 3920 7517
      3923 7518 3929 7526 3928 7529 3934 7534
      3936 7541 3932 7544 3927 7540 3918 7539
      3915 7552 3937 7563
TIME...MOT...LOC 2106Z 253DEG 29KT 3928 7544

$$

HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	42 min
Jul 15, 3:42 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	63 min
Jul 15, 4:37 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle	4 hr
Jul 15, 5:19 PM EDT	Special Weather Statement	PHI	Sussex	56 min
Jul 15, 6:34 PM EDT	Areal Flood Advisory	PHI	Kent, Sussex	4 hr
Jul 15, 3:00 PM EDT	Special Weather Statement	PHI	Kent	60 min
Jul 15, 3:47 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's, Talbot	58 min
Jul 15, 4:15 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	60 min
Jul 14, 8:19 PM EDT	Flash Flood Warning	PHI	Burlington, Camden, Hunterdon, Mercer, Middlesex, Monmouth and 1 more	4 hr
Jul 14, 8:19 PM EDT	Tornado Warning	PHI	Burlington	26 min
Jul 14, 8:36 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	54 min
Jul 14, 8:43 PM EDT	Flash Flood Warning	PHI	Burlington, Monmouth, Ocean	4 hr
Jul 14, 9:06 PM EDT	Special Marine Warning	PHI		84 min
Jul 14, 10:26 PM EDT	Special Marine Warning	PHI		49 min
Jul 15, 2:50 AM EDT	Areal Flood Warning	PHI	Ocean	5 hr
Jul 15, 3:53 AM EDT	Small Craft Advisory	PHI		24 hr
Jul 15, 1:09 PM EDT	Special Weather Statement	PHI	Somerset	66 min
Jul 15, 1:21 PM EDT	Special Weather Statement	PHI	Middlesex, Monmouth	54 min
Jul 15, 1:22 PM EDT	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 2 more	3 hr
Jul 15, 1:36 PM EDT	Special Weather Statement	PHI	Monmouth	54 min
Jul 15, 1:50 PM EDT	Flash Flood Warning	PHI	Middlesex, Monmouth, Ocean	4 hr
Jul 15, 1:52 PM EDT	Special Weather Statement	PHI	Burlington, Camden	68 min
Jul 15, 2:17 PM EDT	Special Weather Statement	PHI	Mercer	43 min
Jul 15, 2:22 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	4 hr
Jul 15, 2:29 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	51 min
Jul 15, 2:30 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth	41 min
Jul 15, 2:43 PM EDT	Special Weather Statement	PHI	Monmouth	32 min
Jul 15, 2:44 PM EDT	Special Marine Warning	PHI		31 min
Jul 15, 2:46 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	3 hr
Jul 15, 3:14 PM EDT	Flash Flood Warning	PHI	Monmouth, Ocean	7 hr
Jul 15, 3:23 PM EDT	Special Weather Statement	PHI	Monmouth	67 min
Jul 15, 3:44 PM EDT	Special Marine Warning	PHI		91 min
Jul 15, 4:26 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex, Somerset	64 min
Jul 15, 4:27 PM EDT	Flash Flood Warning	PHI	Camden, Cumberland, Gloucester, Salem	4 hr
Jul 15, 4:37 PM EDT	Special Weather Statement	PHI	Camden, Gloucester, Salem	53 min
Jul 15, 4:53 PM EDT	Special Marine Warning	PHI		67 min
Jul 15, 5:05 PM EDT	Special Weather Statement	PHI	Burlington	55 min
Jul 15, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset	64 min
Jul 15, 5:14 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Monmouth, Ocean	61 min
Jul 15, 5:43 PM EDT	Special Weather Statement	PHI	Ocean	62 min
Jul 15, 5:45 PM EDT	Special Weather Statement	PHI	Atlantic	60 min
Jul 15, 5:50 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset	4 hr
Jul 15, 5:57 PM EDT	Special Marine Warning	PHI		63 min
Jul 15, 6:00 PM EDT	Special Marine Warning	PHI		60 min
Jul 15, 6:03 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	4 hr
Jul 15, 6:05 PM EDT	Special Marine Warning	PHI		115 min
Jul 15, 6:11 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Morris, Ocean and 1 more	4 hr
Jul 15, 6:11 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	50 min
Jul 15, 6:12 PM EDT	Special Weather Statement	PHI	Morris	63 min
Jul 15, 6:17 PM EDT	Special Weather Statement	PHI	Cape May	58 min
Jul 15, 6:44 PM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Ocean	4 hr
Jul 15, 7:20 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Mercer, Monmouth, Ocean	4 hr

Nearby

Severe Thunderstorm Warnings in Delaware, 2014 Severe Thunderstorm Warnings in Maryland, 2014 Severe Thunderstorm Warnings in New Jersey, 2014 Every 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.