Alert archive / New Jersey / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 237, NWS Philadelphia/Mount Holly

August 10, 2008New Castle County, Delaware; Cumberland County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 10, 2008, 7:09 PM EDT for New Castle County, Delaware; Cumberland County, Salem County, New Jersey. It was in force for 66 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
Aug 10, 2008, 7:09 PM EDT (23:09 UTC)
Expired
Aug 10, 2008, 8:15 PM EDT
In force
66 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

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

The radar

The Dover AFB radar (KDOX), 80 km from the middle of the area, began a volume at 23:12 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
Aug 10, 10:46 AM EDTSevere Thunderstorm WatchSPC10 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.2 hours before the alert went out and 180 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, Wallops Is Stn, VA at 12:00Z on 2008-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2296 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2008-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 123 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
2296 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
709 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
123 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.9
Supercell composite
4.9

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 102309
SVRPHI
DEC003-NJC011-033-110015-
/O.NEW.KPHI.SV.W.0237.080810T2309Z-080811T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
709 PM EDT SUN AUG 10 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  NORTHWESTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHERN SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 815 PM EDT

* AT 701 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  SALEM...AND MOVING EAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SALEM BY 720 PM...
  ALLOWAY BY 745 PM...
  OLIVET...SEABROOK FARMS AND ELMER BY 815 PM...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM SUNDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW
JERSEY.

LAT...LON 3958 7559 3958 7557 3956 7555 3956 7553
      3959 7554 3965 7520 3950 7499 3944 7551
      3951 7556 3952 7554 3955 7553 3956 7555
      3954 7557
TIME...MOT...LOC 2309Z 269DEG 13KT 3953 7552

$$

RNS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 10:21 AM EDTSevere Thunderstorm WarningPHINew Castle54 min
Aug 10, 11:46 AM EDTSevere Thunderstorm WarningPHINew Castle59 min
Aug 10, 12:03 PM EDTSevere Thunderstorm WarningPHISussex57 min
Aug 10, 12:09 PM EDTTornado WarningPHINew Castle36 min
Aug 10, 12:40 PM EDTSevere Thunderstorm WarningPHINew Castle95 min
Aug 10, 5:45 PM EDTSevere Thunderstorm WarningPHINew Castle75 min
Aug 10, 5:59 PM EDTAreal Flood AdvisoryPHINew Castle2 hr
Aug 10, 6:36 PM EDTSevere Thunderstorm WarningPHINew Castle69 min
Aug 10, 9:48 AM EDTSpecial Marine WarningPHI57 min
Aug 10, 9:55 AM EDTSevere Thunderstorm WarningPHICape May46 min
Aug 10, 10:11 AM EDTSevere Thunderstorm WarningPHISalem64 min
Aug 10, 10:39 AM EDTSevere Thunderstorm WarningPHIGloucester66 min
Aug 10, 11:17 AM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester58 min
Aug 10, 11:32 AM EDTAreal Flood AdvisoryPHICamden, Gloucester3 hr
Aug 10, 11:55 AM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester65 min
Aug 10, 11:56 AM EDTFlash Flood WarningPHICamden, Gloucester4 hr
Aug 10, 12:05 PM EDTSpecial Marine WarningPHI55 min
Aug 10, 12:45 PM EDTSevere Thunderstorm WarningPHICape May60 min
Aug 10, 12:51 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester, Ocean84 min
Aug 10, 12:56 PM EDTTornado WarningPHIGloucester, Salem34 min
Aug 10, 1:05 PM EDTSevere Thunderstorm WarningPHIHunterdon, Warren115 min
Aug 10, 1:22 PM EDTFlash Flood WarningPHIGloucester, Salem3 hr
Aug 10, 1:29 PM EDTTornado WarningPHICamden, Gloucester, Salem28 min
Aug 10, 1:53 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Salem67 min
Aug 10, 2:10 PM EDTSevere Thunderstorm WarningPHIOcean50 min
Aug 10, 2:23 PM EDTSpecial Marine WarningPHI67 min
Aug 10, 2:36 PM EDTSpecial Marine WarningPHI54 min
Aug 10, 2:50 PM EDTSevere Thunderstorm WarningPHIBurlington55 min
Aug 10, 3:33 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester, Salem39 min
Aug 10, 3:44 PM EDTSpecial Marine WarningPHI61 min
Aug 10, 3:46 PM EDTSevere Thunderstorm WarningPHIOcean24 min
Aug 10, 4:10 PM EDTAreal Flood WarningPHIAtlantic, Burlington, Camden, Gloucester, Ocean, Salem3 hr
Aug 10, 6:45 PM EDTAreal Flood AdvisoryPHICamden, Gloucester, Salem2 hr
Aug 10, 7:04 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May56 min
Aug 10, 7:15 PM EDTSpecial Marine WarningPHI60 min
Aug 10, 7:42 PM EDTSevere Thunderstorm WarningPHICumberland56 min
Aug 10, 7:45 PM EDTSpecial Marine WarningPHI60 min
Aug 10, 7:53 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester67 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2008Severe Thunderstorm Warnings in Delaware, 2008Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.