Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 22, NWS Philadelphia/Mount Holly

May 28, 2005Bucks County, Montgomery County, Pennsylvania; Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 28, 2005, 4:15 PM EDT for Bucks County, Montgomery County, Pennsylvania; Mercer County, New Jersey. It was in force for 30 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 28, 2005, 4:15 PM EDT (20:15 UTC)
Expired: May 28, 2005, 4:45 PM EDT
In force: 30 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties Mercer County, NJ, Bucks County, PA, Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 54 km from the middle of the area, began a volume at 20:17 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 nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.3 hours before the alert went out and 191 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: 1800 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 106 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 282015
SVRPHI
NJC021-PAC017-091-282045-
/O.NEW.KPHI.SV.W.0022.050528T2015Z-050528T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
415 PM EDT SAT MAY 28 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
  SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA
  EAST CENTRAL MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA

* UNTIL 445 PM EDT

* AT 413 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  SHOWERS AND THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN
  EXCESS OF 70 MPH.  THIS STORM WAS LOCATED NEAR FEASTERVILLE...OR
  ABOUT 11 MILES NORTHEAST OF PHILADELPHIA...AND MOVING NORTHEAST AT
  30 MPH. WIND GUSTS TO 69 MPH HAVE BEEN REPORTED IN PHILADELPHIA.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RICHBORO BY 420 PM EDT
  LANGHORNE AND NEWTOWN BY 425 PM EDT
  WOODSIDE AND LEVITTOWN BY 430 PM EDT
  TRENTON...EWING AND WHITE HORSE BY 440 PM EDT
  PENNINGTON BY 445 PM EDT

LAT...LON 4020 7519 4012 7511 4012 7502 4009 7489
      4027 7452 4040 7476

$$

RNS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 3:46 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	44 min
May 28, 4:41 PM EDT	Tornado Warning	PHI	Bucks	22 min
May 28, 2:53 PM EDT	Special Marine Warning	PHI		97 min
May 28, 4:10 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	50 min
May 28, 4:27 PM EDT	Tornado Warning	PHI	Burlington	33 min
May 28, 4:36 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	54 min
May 28, 4:45 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Somerset	45 min
May 28, 4:56 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic	36 min
May 28, 5:03 PM EDT	Special Marine Warning	PHI		42 min
May 28, 5:42 PM EDT	Special Marine Warning	PHI		63 min
May 28, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	29 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.