Alert archive / New Jersey / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 176, NWS Philadelphia/Mount Holly

July 27, 2008Salem County, New Jersey; New Castle County, Delaware; Cecil County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 27, 2008, 2:00 PM EDT for Salem County, New Jersey; New Castle County, Delaware; Cecil County, Maryland. It was in force for 60 min. 3 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 27, 2008, 2:00 PM EDT (18:00 UTC)
Expired: Jul 27, 2008, 3:00 PM EDT
In force: 60 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties New Castle County, DE, Cecil County, MD, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 80 km from the middle of the area, began a volume at 18:01 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 27, 2:00 PM EDT	TSTM WND GST 44	Delaware City, DE	A THUNDERSTORM WIND GUST TO 44 MPH WAS MEASURED IN DELAWARE CITY.
Jul 27, 2:18 PM EDT	TSTM WND GST 52	Delaware City, DE	A THUNDERSTORM WIND GUST TO 52 MPH WAS MEASURED IN DELAWARE CITY.
Jul 27, 2:22 PM EDT	HAIL 0.75	Bear, DE	PENNY SIZE HAIL REPORTED IN BEAR.

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 27, 11:26 AM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.0 hours before the alert went out and 158 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: 1356 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1062 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 271800
SVRPHI
DEC003-MDC015-NJC033-271900-
/O.NEW.KPHI.SV.W.0176.080727T1800Z-080727T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
200 PM EDT SUN JUL 27 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 300 PM EDT

* AT 158 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  ELKTON...AND MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CHERRY HILL...BARKSDALE AND APPLETON BY 205 PM...
  ELKTON AND GLEN WESTOVER BY 210 PM...
  NEWARK BY 215 PM...
  GLASGOW BY 220 PM...
  BEAR BY 225 PM...
  SAINT GEORGES BY 230 PM...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
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 SUNDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA.

LAT...LON 3944 7600 3950 7601 3954 7598 3956 7600
      3972 7598 3973 7538 3944 7549 3945 7554
      3950 7557 3952 7554 3957 7553 3958 7556
      3954 7555 3947 7559 3939 7551 3938 7602
TIME...MOT...LOC 1800Z 281DEG 21KT 3965 7587

$$

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 11:29 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington	46 min
Jul 27, 11:41 AM EDT	Severe Thunderstorm Warning	PHI	Monmouth	34 min
Jul 27, 11:50 AM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	70 min
Jul 27, 12:06 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May	54 min
Jul 27, 12:12 PM EDT	Special Marine Warning	PHI		63 min
Jul 27, 12:41 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	49 min
Jul 27, 12:44 PM EDT	Special Marine Warning	PHI		61 min
Jul 27, 1:18 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	57 min
Jul 27, 1:19 PM EDT	Special Marine Warning	PHI		56 min
Jul 27, 1:44 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer	61 min
Jul 27, 1:58 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	62 min
Jul 27, 2:06 PM EDT	Areal Flood Advisory	PHI	Monmouth	3 hr
Jul 27, 2:11 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	64 min
Jul 27, 2:14 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Mercer, Monmouth, Ocean	61 min
Jul 27, 2:17 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Cumberland, Gloucester, Salem	58 min
Jul 27, 2:18 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Morris, Somerset	57 min
Jul 27, 2:30 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer	2 hr
Jul 27, 2:31 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	59 min
Jul 27, 2:38 PM EDT	Special Marine Warning	PHI		67 min
Jul 27, 2:38 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Ocean	67 min
Jul 27, 2:44 PM EDT	Special Marine Warning	PHI		2 hr
Jul 27, 2:50 PM EDT	Areal Flood Advisory	PHI	Middlesex, Morris, Somerset	115 min
Jul 27, 2:52 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Monmouth, Ocean	53 min
Jul 27, 3:01 PM EDT	Special Marine Warning	PHI		119 min
Jul 27, 3:12 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	63 min
Jul 27, 3:41 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	34 min
Jul 27, 3:49 PM EDT	Special Marine Warning	PHI		56 min
Jul 27, 4:05 PM EDT	Special Marine Warning	PHI		115 min
Jul 27, 4:09 PM EDT	Special Marine Warning	PHI		2 hr
Jul 27, 4:15 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May	60 min
Jul 27, 4:39 PM EDT	Special Marine Warning	PHI		51 min
Jul 27, 4:44 PM EDT	Special Marine Warning	PHI		61 min
Jul 27, 5:45 PM EDT	Special Marine Warning	PHI		90 min
Jul 27, 5:47 PM EDT	Special Marine Warning	PHI		88 min
Jul 27, 12:57 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	63 min
Jul 27, 2:35 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	55 min
Jul 27, 3:38 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	54 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2008 Severe Thunderstorm Warnings in Delaware, 2008 Severe Thunderstorm Warnings in Maryland, 2008 Every severe thunderstorm warning in 2008

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.