Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 93, NWS Philadelphia/Mount Holly

July 27, 2005Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 27, 2005, 6:34 PM EDT for Bucks County, Pennsylvania. It was in force for 56 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: Jul 27, 2005, 6:34 PM EDT (22:34 UTC)
Expired: Jul 27, 2005, 7:30 PM EDT
In force: 56 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Bucks County, PA

The radar

The Philadelphia radar (KDIX), 65 km from the middle of the area, began a volume at 22:35 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
Jul 27, 1:50 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.6 hours before the alert went out and 125 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: 1105 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1506 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 29 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 272234
SVRPHI
PAC017-272330-
/O.NEW.KPHI.SV.W.0093.050727T2234Z-050727T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
634 PM EDT WED JUL 27 2005

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA

* UNTIL 730 PM EDT

* AT 631 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR CHALFONT...OR
  ABOUT 18 MILES NORTH OF PHILADELPHIA...AND MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  IVYLAND BY 640 PM EDT
  RICHBORO AND FEASTERVILLE BY 645 PM EDT
  NEWTOWN AND LANGHORNE BY 650 PM EDT
  WOODSIDE AND LEVITTOWN BY 655 PM EDT

HEAVY RAIN...STRONG WINDS...AND HAIL ARE POSSIBLE WITH THIS STORM.

LAT...LON 4034 7529 4012 7501 4016 7472 4034 7496

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	39 min
Jul 27, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Berks	48 min
Jul 27, 4:30 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Northampton	45 min
Jul 27, 5:17 PM EDT	Severe Thunderstorm Warning	PHI	Berks	43 min
Jul 27, 5:47 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	58 min
Jul 27, 6:30 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	45 min
Jul 27, 6:40 PM EDT	Severe Thunderstorm Warning	PHI	Montgomery	35 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 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.