Alert archive / Delaware / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 43, NWS Philadelphia/Mount Holly

May 25, 2004New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 25, 2004, 8:14 PM EDT for New Castle County, Delaware. It was in force for 61 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
May 25, 2004, 8:14 PM EDT (00:14 UTC)
Expired
May 25, 2004, 9:15 PM EDT
In force
61 min
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

County New Castle County, DE

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 25, 7:25 PM EDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.2 hours before the alert went out and 160 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, Washington/Dulle, VA at 00:00Z on 2004-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1367 joules per kilogram.LCLLFCEL10008507005003002001001 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, Washington/Dulle, VA at 00:00Z on 2004-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 200 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
1367 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
973 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
200 m²/s²
0-3 km storm-relative helicity
340 m²/s²
Significant tornado parameter
1.9
Supercell composite
6.8

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 260014
SVRPHI
DEC003-260115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
813 PM EDT TUE MAY 25 2004

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE
  THIS INCLUDES THE CITY OF NEWARK

* UNTIL 915 PM EDT

* AT 810 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS.  THESE STORMS WERE LOCATED ALONG A
  LINE EXTENDING FROM 8 MILES WEST OF NEWARK TO 13 MILES WEST OF
  MIDDLETOWN...OR ALONG A LINE EXTENDING FROM 8 MILES WEST OF NEWARK
  TO 23 MILES SOUTHWEST OF NEWARK...AND MOVING EAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  NEWARK BY 830 PM EDT
  MIDDLETOWN BY 840 PM EDT
  NEW CASTLE AND DELAWARE CITY BY 855 PM EDT

  THESE STORMS HAVE A HISTORY OF PRODUCING DAMAGING WINDS AND HAIL.

LAT...LON 3971 7580 3931 7578 3931 7558 3967 7557

$$

RPW

The office that day

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

IssuedProductOfficeCountiesLasted
May 25, 8:36 PM EDTSevere Thunderstorm WarningPHIKent54 min
May 25, 9:22 PM EDTSevere Thunderstorm WarningPHISussex68 min
May 25, 9:30 PM EDTSevere Thunderstorm WarningPHIKent30 min

Nearby

Severe Thunderstorm Warnings in Delaware, 2004Every severe thunderstorm warning in 2004

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.