Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 4, NWS Philadelphia/Mount Holly

January 14, 2005Bucks County, Pennsylvania; Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jan 14, 2005, 5:28 AM EST for Bucks County, Pennsylvania; Mercer County, New Jersey. It was in force for 32 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: Jan 14, 2005, 5:28 AM EST (10:28 UTC)
Expired: Jan 14, 2005, 6:00 AM EST
In force: 32 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties Mercer County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 55 km from the middle of the area, began a volume at 10:28 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.

Issued	Product	Office	Lasted
Jan 14, 4:40 AM EST	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 10.5 hours before the alert went out and 176 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: 587 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 248 m²/s²
0-3 km storm-relative helicity: 202 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 
WUUS51 KPHI 141029
SVRPHI
NJC021-PAC017-141100-
/X.NEW.KPHI.SV.W.0004.050114T1028Z-050114T1100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
528 AM EST FRI JAN 14 2005

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY
  THIS INCLUDES THE CITY OF TRENTON
  SOUTHERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA

* UNTIL 600 AM EST

* AT 528 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR FEASTERVILLE...
  AND MOVING NORTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WOODSIDE BY 535 AM EST
  EWING AND TRENTON BY 540 AM EST
  PENNINGTON AND LAWRENCEVILLE BY 545 AM EST
  PRINCETON AND HOPEWELL BY 550 AM EST

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 4042 7475 4037 7473 4038 7463 4034 7465
      4031 7460 4011 7495 4014 7502 4023 7513
      4034 7496 4034 7485 4037 7485 4037 7482
      4042 7478

$$

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 14, 4:15 AM EST	Severe Thunderstorm Warning	PHI	Chester, Montgomery	45 min
Jan 14, 4:43 AM EST	Severe Thunderstorm Warning	PHI	Hunterdon	32 min
Jan 14, 5:03 AM EST	Severe Thunderstorm Warning	PHI	Morris, Somerset	42 min
Jan 14, 5:40 AM EST	Severe Thunderstorm Warning	PHI	Burlington, Monmouth	50 min
Jan 14, 5:52 AM EST	Severe Thunderstorm Warning	PHI	Middlesex	38 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2005 Severe Thunderstorm Warnings in New Jersey, 2005 Every severe thunderstorm warning in 2005

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.