Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 213, NWS Philadelphia/Mount Holly

July 28, 2006Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2006, 12:32 AM EDT for Philadelphia County, Pennsylvania. It was in force for 43 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 28, 2006, 12:32 AM EDT (04:32 UTC)
Expired: Jul 28, 2006, 1:15 AM EDT
In force: 43 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 60 km from the middle of the area, began a volume at 04:34 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 00:00Z, 4.5 hours before the alert went out and 211 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: 874 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 789 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 135 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 280432
SVRPHI
PAC101-280515-
/O.NEW.KPHI.SV.W.0213.060728T0432Z-060728T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1232 AM EDT FRI JUL 28 2006

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA
  THIS INCLUDES THE CITY OF PHILADELPHIA

* UNTIL 115 AM EDT

* AT 1229 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR PHILADELPHIA...AND MOVING
  EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE IMPACT MAINLY RURAL AREAS OF
  THE INDICATED COUNTY.

LAT...LON 4004 7518 3992 7521 4007 7495 4012 7502

$$

EBERWINE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 10:55 PM EDT	Severe Thunderstorm Warning	PHI	Chester	65 min
Jul 27, 11:32 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Montgomery	88 min
Jul 28, 12:40 AM EDT	Flash Flood Warning	PHI	Bucks, Montgomery, Philadelphia	3 hr
Jul 28, 12:40 AM EDT	Severe Thunderstorm Warning	PHI	Bucks	65 min
Jul 28, 2:28 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	62 min
Jul 28, 2:49 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	56 min
Jul 28, 3:07 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	53 min
Jul 28, 4:03 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	57 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2006 Every severe thunderstorm warning in 2006

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.