Alert archive / Pennsylvania / Tornado Warnings in 2004

Tornado Warning 6, NWS Philadelphia/Mount Holly

July 14, 2004Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this tornado warning at Jul 14, 2004, 5:01 PM EDT for Montgomery County, Pennsylvania. It was in force for 29 min. 1 report 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, 2004, 5:01 PM EDT (21:01 UTC)
Expired
Jul 14, 2004, 5:30 PM EDT
In force
29 min
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

County Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 97 km from the middle of the area, began a volume at 21:02 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

TimeReportWhereRemark
Jul 14, 5:20 PM EDTTSTM WND DMGHatfield, PALARGE LIMBS DOWNED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.0 hours before the alert went out and 106 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, Phillips Aaf/Abe, MD at 12:00Z on 2004-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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, Phillips Aaf/Abe, MD at 12:00Z on 2004-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 91 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
3 J/kg
Mixed-layer CIN
-233 J/kg
Mixed-layer LCL
719 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
91 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.

000 
WFUS51 KPHI 142101
TORPHI
PAC091-142130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
501 PM EDT WED JUL 14 2004

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA

* UNTIL 530 PM EDT

* AT 500 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR SPRING
  MOUNT...OR ABOUT 20 MILES SOUTH OF ALLENTOWN...MOVING EAST AT 15
  MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  SOUDERTON BY 525 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
WEDNESDAY EVENING FOR NORTHWEST NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 4027 7525 4024 7539 4024 7542 4021 7550
      4021 7553 4031 7559 4036 7560 4038 7558
      4041 7548

$$

IOVINO

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 2:22 PM EDTSevere Thunderstorm WarningPHIBucks53 min
Jul 14, 3:05 PM EDTFlash Flood WarningPHIChester, Delaware, Philadelphia76 days
Jul 14, 3:12 PM EDTSevere Thunderstorm WarningPHIBerks63 min
Jul 14, 4:10 PM EDTSevere Thunderstorm WarningPHIBerks65 min
Jul 14, 4:24 PM EDTSevere Thunderstorm WarningPHIChester66 min
Jul 14, 4:44 PM EDTSevere Thunderstorm WarningPHIBucks, Montgomery61 min
Jul 14, 5:17 PM EDTSpecial Marine WarningPHI103 min
Jul 14, 5:41 PM EDTSevere Thunderstorm WarningPHIPhiladelphia64 min
Jul 14, 5:44 PM EDTSevere Thunderstorm WarningPHIBucks61 min
Jul 14, 5:51 PM EDTFlash Flood WarningPHIBucks2 hr
Jul 14, 6:01 PM EDTSpecial Marine WarningPHI74 min
Jul 14, 6:39 PM EDTSpecial Marine WarningPHI66 min
Jul 14, 6:39 PM EDTSpecial Marine WarningPHI66 min
Jul 14, 6:46 PM EDTFlash Flood WarningPHIBerks3 hr
Jul 14, 7:00 PM EDTSpecial Marine WarningPHI60 min
Jul 14, 7:38 PM EDTSpecial Marine WarningPHI82 min
Jul 14, 7:38 PM EDTSpecial Marine WarningPHI82 min

Nearby

Tornado Warnings in Pennsylvania, 2004Every tornado warning in 2004Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.