Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 95, NWS Philadelphia/Mount Holly

July 19, 20104 counties in Pennsylvania; Burlington County, Camden County, Gloucester County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 19, 2010, 9:07 AM EDT for 4 counties in Pennsylvania; Burlington County, Camden County, Gloucester County, New Jersey. It was in force for 53 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 19, 2010, 9:07 AM EDT (13:07 UTC)
Expired: Jul 19, 2010, 10:00 AM EDT
In force: 53 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 47 km from the middle of the area, began a volume at 13:10 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

Time	Report	Where	Remark
Jul 19, 9:20 AM EDT	TSTM WND DMG	Cherry Hill, NJ	WIRES REPORTED DOWN ON ROUTE 70 WEST NEAR CUTHBERT BLVD.

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, 1.1 hours before the alert went out and 110 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: 775 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 883 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -31 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

195 
WUUS51 KPHI 191307
SVRPHI
NJC005-007-015-PAC017-045-091-101-191400-
/O.NEW.KPHI.SV.W.0095.100719T1307Z-100719T1400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
907 AM EDT MON JUL 19 2010

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
  EASTERN DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
  EXTREME SOUTH CENTRAL MONTGOMERY COUNTY IN SOUTHEAST
  PENNSYLVANIA...
  PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF PHILADELPHIA...
  NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  NORTHWESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF CAMDEN...
  NORTH CENTRAL GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 1000 AM EDT

* AT 905 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 SOUTH PHILADELPHIA...OR
  NEAR CAMDEN...AND MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CAMDEN AND PHILADELPHIA AROUND 915 AM EDT...
  PALMYRA...WISSINOMING AND TACONY AROUND 920 AM EDT...
  HOLMESBURG AROUND 925 AM EDT...
  RIVERSIDE...ANDALUSIA AND MOUNT LAUREL AROUND 930 AM EDT...
  WILLINGBORO AROUND 935 AM EDT...

LAT...LON 3971 7528 3999 7536 4017 7467 4015 7465
      3987 7454
TIME...MOT...LOC 1307Z 254DEG 31KT 3995 7518

$$

HAYES

1 follow-up statement

178 
WWUS51 KPHI 191325
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
925 AM EDT MON JUL 19 2010

PAC045-191334-
/O.CAN.KPHI.SV.W.0095.000000T0000Z-100719T1400Z/
DELAWARE PA-
925 AM EDT MON JUL 19 2010

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN DELAWARE COUNTY IS
CANCELLED...

LAT...LON 3974 7515 4003 7521 4016 7466 4015 7465
      3987 7454
TIME...MOT...LOC 1324Z 254DEG 31KT 3999 7499

$$

NJC005-007-015-PAC017-091-101-191400-
/O.CON.KPHI.SV.W.0095.000000T0000Z-100719T1400Z/
CAMDEN NJ-GLOUCESTER NJ-PHILADELPHIA PA-MONTGOMERY PA-BUCKS PA-
BURLINGTON NJ-
925 AM EDT MON JUL 19 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 AM EDT
FOR NORTHWESTERN BURLINGTON...EXTREME SOUTHEASTERN BUCKS...EXTREME
SOUTHEASTERN MONTGOMERY...PHILADELPHIA...NORTH CENTRAL GLOUCESTER AND
NORTHWESTERN CAMDEN COUNTIES...

AT 922 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR PALMYRA...OR 6 MILES
NORTHEAST OF CAMDEN...MOVING EAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  RIVERSIDE...DELANCO...MOUNT LAUREL AND ANDALUSIA BY 930 AM EDT...
  WILLINGBORO...EDGEWATER PARK...BEVERLY AND CROYDON BY 935 AM EDT...
  MOUNT HOLLY AND LUMBERTON BY 940 AM EDT...

LAT...LON 3974 7515 4003 7521 4016 7466 4015 7465
      3987 7454
TIME...MOT...LOC 1324Z 254DEG 31KT 3999 7499

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 5:15 AM EDT	Special Weather Statement	PHI	Berks	60 min
Jul 19, 6:04 AM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh, Monroe, Montgomery, Northampton	56 min
Jul 19, 6:58 AM EDT	Special Weather Statement	PHI	Carbon, Lehigh, Monroe, Northampton	62 min
Jul 19, 7:46 AM EDT	Special Weather Statement	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	59 min
Jul 19, 8:19 AM EDT	Special Weather Statement	PHI	Montgomery	56 min
Jul 19, 8:47 AM EDT	Special Weather Statement	PHI	Delaware	58 min
Jul 19, 2:09 PM EDT	Special Weather Statement	PHI	Carbon	51 min
Jul 19, 2:21 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	54 min
Jul 19, 4:24 PM EDT	Special Weather Statement	PHI	Carbon	36 min
Jul 19, 5:11 PM EDT	Special Weather Statement	PHI	Monroe	49 min
Jul 19, 5:24 PM EDT	Special Weather Statement	PHI	Northampton	51 min
Jul 19, 5:25 PM EDT	Special Weather Statement	PHI	Chester, Delaware, Montgomery	65 min
Jul 19, 5:39 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	66 min
Jul 19, 6:22 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	53 min
Jul 19, 6:34 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	56 min
Jul 19, 6:57 PM EDT	Special Weather Statement	PHI	Berks, Lehigh, Northampton	48 min
Jul 19, 7:20 AM EDT	Special Weather Statement	PHI	Morris	55 min
Jul 19, 9:44 AM EDT	Special Weather Statement	PHI	Burlington, Ocean	61 min
Jul 19, 10:05 AM EDT	Special Weather Statement	PHI	Camden, Gloucester	55 min
Jul 19, 10:15 AM EDT	Special Weather Statement	PHI	Monmouth	60 min
Jul 19, 10:18 AM EDT	Special Marine Warning	PHI		57 min
Jul 19, 10:20 AM EDT	Special Weather Statement	PHI	Atlantic, Camden, Cumberland	55 min
Jul 19, 10:40 AM EDT	Severe Thunderstorm Warning	PHI	Monmouth	21 min
Jul 19, 10:43 AM EDT	Special Marine Warning	PHI		32 min
Jul 19, 4:42 PM EDT	Special Weather Statement	PHI	Sussex	48 min
Jul 19, 4:58 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	28 min
Jul 19, 6:20 PM EDT	Special Weather Statement	PHI	Morris	40 min
Jul 19, 6:52 PM EDT	Special Weather Statement	PHI	Salem	68 min
Jul 19, 7:40 PM EDT	Special Weather Statement	PHI	Burlington, Camden	65 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2010 Severe Thunderstorm Warnings in New Jersey, 2010 Every severe thunderstorm warning in 2010

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.