Alert archive / Delaware / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 126, NWS Philadelphia/Mount Holly

July 14, 2014Salem County, New Jersey; Kent County, New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2014, 7:03 PM EDT for Salem County, New Jersey; Kent County, New Castle County, Delaware. It was in force for 42 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: Jul 14, 2014, 7:03 PM EDT (23:03 UTC)
Expired: Jul 14, 2014, 7:45 PM EDT
In force: 42 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Kent County, DE, New Castle County, DE, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 75 km from the middle of the area, began a volume at 23:03 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

Time	Report	Where	Remark
Jul 14, 7:18 PM EDT	TSTM WND GST 55	Odessa, DE
Jul 14, 7:18 PM EDT	MARINE TSTM WIND 39	Delaware City, DE

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.

Issued	Product	Office	Lasted
Jul 14, 1:24 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.1 hours before the alert went out and 49 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: 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.

787 
WUUS51 KPHI 142303
SVRPHI
DEC001-003-NJC033-142345-
/O.NEW.KPHI.SV.W.0126.140714T2303Z-140714T2345Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  NORTHERN KENT COUNTY IN CENTRAL DELAWARE...
  WESTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 745 PM EDT

* AT 700 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  CHERRY HILL TO SUDLERSVILLE...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...
  NEWARK AND HARTLY AROUND 710 PM EDT...
  PIKE CREEK AND NORTH STAR AROUND 715 PM EDT...
  STANTON AND ASHLAND AROUND 720 PM EDT...
  ELSMERE AND WILMINGTON MANOR AROUND 725 PM EDT...
  PENNSVILLE AND WOODLAND BEACH AROUND 730 PM EDT...
  ARDEN AND SALEM AROUND 735 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME ROTATION WITHIN THIS STORM. WHILE
NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A TORNADO IS
SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM ON THE LOWEST
FLOOR.

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 800 PM EDT MONDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA.

&&

LAT...LON 3980 7572 3981 7544 3946 7538 3946 7541
      3938 7542 3938 7543 3943 7547 3946 7555
      3957 7552 3959 7556 3951 7555 3947 7558
      3927 7540 3917 7540 3912 7575 3972 7579
TIME...MOT...LOC 2302Z 256DEG 32KT 3968 7583 3920 7579

$$

FORECASTER: SZATKOWSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 9:16 PM EDT	Special Weather Statement	PHI	Warren	89 min
Jul 13, 9:33 PM EDT	Severe Thunderstorm Warning	PHI	Warren	57 min
Jul 13, 10:18 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Somerset	57 min
Jul 13, 10:27 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	47 min
Jul 13, 10:41 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Warren	2 hr
Jul 13, 10:48 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	37 min
Jul 13, 11:05 PM EDT	Special Marine Warning	PHI		85 min
Jul 13, 11:07 PM EDT	Special Weather Statement	PHI	Hunterdon, Mercer, Somerset	38 min
Jul 13, 11:21 PM EDT	Special Weather Statement	PHI	Burlington, Camden	54 min
Jul 13, 11:27 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset	2 hr
Jul 13, 11:47 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex	43 min
Jul 14, 3:54 AM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	45 hr
Jul 14, 4:02 AM EDT	Small Craft Advisory	PHI		24 hr
Jul 14, 4:08 PM EDT	Special Weather Statement	PHI	Monmouth	52 min
Jul 14, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	63 min
Jul 14, 4:17 PM EDT	Special Weather Statement	PHI	Sussex	58 min
Jul 14, 4:21 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex	3 hr
Jul 14, 4:28 PM EDT	Flash Flood Warning	PHI	Monmouth, Ocean	4 hr
Jul 14, 5:33 PM EDT	Special Weather Statement	PHI	Monmouth	57 min
Jul 14, 5:54 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Warren	4 hr
Jul 14, 6:15 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Sussex, Warren	4 hr
Jul 14, 6:54 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Somerset	3 hr
Jul 14, 7:17 PM EDT	Special Weather Statement	PHI	Mercer	58 min
Jul 14, 7:29 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	46 min
Jul 14, 7:39 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	3 hr
Jul 14, 7:53 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	67 min
Jul 13, 10:02 PM EDT	Special Weather Statement	PHI	New Castle	58 min
Jul 13, 10:14 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	46 min
Jul 14, 7:49 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	51 min

Nearby

Severe Thunderstorm Warnings in Delaware, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.