Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 115, NWS Philadelphia/Mount Holly

July 2, 2006Delaware County, Pennsylvania; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 2, 2006, 6:54 PM EDT for Delaware County, Pennsylvania; New Castle County, Delaware. It was in force for 51 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 2, 2006, 6:54 PM EDT (22:54 UTC)
Expired: Jul 2, 2006, 7:45 PM EDT
In force: 51 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties New Castle County, DE, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 102 km from the middle of the area, began a volume at 22:57 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 2, 7:30 PM EDT	TSTM WND DMG	Wilmington, DE	TREES DOWN ON 202. NEW CASTLE COUNTY AIRPORT GUSTED TO 57 MPH.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 2, 4:03 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.9 hours before the alert went out and 184 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: 555 J/kg
Mixed-layer CIN: -138 J/kg
Mixed-layer LCL: 1325 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 143 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 022254
SVRPHI
DEC003-PAC045-022345-
/O.NEW.KPHI.SV.W.0115.060702T2254Z-060702T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
654 PM EDT SUN JUL 2 2006

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE
  THIS INCLUDES THE CITY OF WILMINGTON
  DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA

* UNTIL 745 PM EDT

* AT 653 PM 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 NORTH STAR...OR ABOUT 10
  MILES NORTH OF NEWARK...AND MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HOCKESSIN BY 700 PM EDT...
  6 MILES NORTH OF STANTON AND 6 MILES NORTH OF NEWPORT BY 705 PM
  EDT...
  TALLEYVILLE...ELSMERE AND 8 MILES NORTH OF WILMINGTON MANOR BY 710
  PM EDT...
  BELLEFONTE AND WILMINGTON BY 715 PM EDT...
  9 MILES SOUTH OF LIMA BY 720 PM EDT...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 3978 7574 3982 7569 3984 7561 3986 7560
      3987 7561 3995 7551 3998 7544 3999 7534
      3967 7557 3972 7578

$$

TFG

1 follow-up statement

000 
WWUS51 KPHI 022334
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
733 PM EDT SUN JUL 2 2006

DEC003-PAC045-022345-
/O.CON.KPHI.SV.W.0115.000000T0000Z-060702T2345Z/
NEW CASTLE DE-DELAWARE PA-
733 PM EDT SUN JUL 2 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR EASTERN DELAWARE AND NORTHERN NEW CASTLE COUNTIES...

AT 730 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR STANTON..MOVING EAST AT 35 MPH. THE STORM IN DELAWARE
COUNTY WAS SLIGHTLY WEAKER.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  7 MILES SOUTH OF WILMINGTON BY 740 PM EDT...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

SEEK SHELTER IMMEDIATELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
SUNDAY EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 3978 7574 3982 7569 3984 7561 3986 7560
      3987 7561 3995 7551 3998 7544 3999 7534
      3967 7557 3972 7578

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 4:29 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	91 min
Jul 2, 5:47 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	58 min
Jul 2, 6:09 PM EDT	Severe Thunderstorm Warning	PHI	Chester	66 min
Jul 2, 6:12 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	63 min
Jul 2, 6:24 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	36 min
Jul 2, 6:58 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	32 min
Jul 2, 7:01 PM EDT	Severe Thunderstorm Warning	PHI	Montgomery, Philadelphia	59 min
Jul 2, 7:38 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	37 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2006 Severe Thunderstorm Warnings in Delaware, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.