Alert archive / Maryland / Tornado Warnings in 2004

Tornado Warning 9, NWS Philadelphia/Mount Holly

August 4, 2004Cecil County, Maryland; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this tornado warning at Aug 4, 2004, 8:08 PM EDT for Cecil County, Maryland; New Castle County, Delaware. It was in force for 22 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 4, 2004, 8:08 PM EDT (00:08 UTC)
Expired: Aug 4, 2004, 8:30 PM EDT
In force: 22 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties New Castle County, DE, Cecil County, MD

The watch it was issued in

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

Issued	Product	Office	Lasted
Aug 4, 7:10 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.1 hours before the alert went out and 166 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1813 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 79 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.

000 
WFUS51 KPHI 050008
TORPHI
DEC003-MDC015-050030-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
807 PM EDT WED AUG 4 2004

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN CECIL COUNTY IN NORTHEAST MARYLAND
  NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE
  THIS INCLUDES THE CITY OF NEWARK

* UNTIL 830 PM EDT

* AT 802 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR ELKTON...OR
  ABOUT OVER NEWARK...MOVING SOUTHEAST AT 35 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  8 MILES SOUTHWEST OF WILMINGTON MANOR BY 820 PM EDT
  DELAWARE CITY BY 825 PM EDT

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3960 7558 3959 7560 3949 7561 3960 7594
      3972 7589 3972 7579 3974 7575 3968 7557
      3962 7561 3961 7561

$$

SZATKOWSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 8:25 PM EDT	Severe Thunderstorm Warning	PHI	Queen Anne's	35 min
Aug 4, 8:35 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	55 min
Aug 4, 9:11 PM EDT	Severe Thunderstorm Warning	PHI	Kent	49 min
Aug 4, 9:24 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	81 min

Nearby

Tornado Warnings in Maryland, 2004 Tornado Warnings in Delaware, 2004 Every tornado warning in 2004 Tornadoes 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.