Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 108, NWS Philadelphia/Mount Holly

July 2, 2006Berks County, Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 2, 2006, 5:47 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 58 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, 5:47 PM EDT (21:47 UTC)
Expired: Jul 2, 2006, 6:45 PM EDT
In force: 58 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties Berks County, PA, Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 142 km from the middle of the area, began a volume at 21:50 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, 6:20 PM EDT	TSTM WND DMG	5 N Reading, PA	TREE LIMBS DOWN AND PEA SIZE HAIL

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, 9.8 hours before the alert went out and 224 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 022148
SVRPHI
PAC011-077-022245-
/O.NEW.KPHI.SV.W.0108.060702T2147Z-060702T2245Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BERKS COUNTY IN EASTERN PENNSYLVANIA
  THIS INCLUDES THE CITY OF READING
  LEHIGH COUNTY IN EASTERN PENNSYLVANIA
  THIS INCLUDES THE CITY OF ALLENTOWN

* UNTIL 645 PM EDT

* AT 546 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 11 MILES WEST OF SCHNECKSVILLE TO 15 MILES WEST OF HAMBURG...
  OR ALONG A LINE EXTENDING FROM 20 MILES NORTHWEST OF ALLENTOWN TO
  22 MILES NORTHWEST OF READING...AND MOVING EAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  LENHARTSVILLE AND HAMBURG BY 600 PM EDT...
  SCHNECKSVILLE BY 605 PM EDT...
  LEESPORT BY 610 PM EDT...
  READING AND KUTZTOWN BY 615 PM EDT...
  FLEETWOOD AND ALLENTOWN BY 620 PM EDT...
  BIRDSBORO AND ANCIENT OAKS BY 625 PM EDT...

THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE ACROSS SCHULYKILL
COUNTY. THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW 
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS

LAT...LON 4074 7599 4052 7625 4022 7579 4054 7540
      4074 7573

$$

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, 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, 6:54 PM EDT	Severe Thunderstorm Warning	PHI	Delaware	51 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 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.