Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 203, NWS Philadelphia/Mount Holly

August 2, 2008Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 2, 2008, 5:50 PM EDT for Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania. It was in force for 55 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
Aug 2, 2008, 5:50 PM EDT (21:50 UTC)
Expired
Aug 2, 2008, 6:45 PM EDT
In force
55 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Warren County, NJ, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 133 km from the middle of the area, began a volume at 21:52 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

TimeReportWhereRemark
Aug 2, 6:25 PM EDTHAIL 0.756 S Belvidere, NJPENNY SIZE HAIL IN LOWER BETHEL TWP.

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.

IssuedProductOfficeLasted
Aug 2, 10:39 AM EDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.8 hours before the alert went out and 191 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2008-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 84 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2008-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
84 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
1436 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
65 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 022150
SVRPHI
NJC041-PAC089-095-022245-
/O.NEW.KPHI.SV.W.0203.080802T2150Z-080802T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
550 PM EDT SAT AUG 2 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  SOUTHERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  WESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 645 PM EDT

* AT 547 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  BRODHEADSVILLE...OR ABOUT 10 MILES SOUTH OF MOUNT POCONO...AND
  MOVING SOUTHEAST AT 24 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SAYLORSBURG BY 600 PM...
  STORMVILLE BY 605 PM...
  EAST BANGOR AND DELAWARE WATER GAP BY 615 PM...
  COLUMBIA BY 625 PM...
  BELVIDERE BY 635 PM...
  HOPE BY 640 PM...

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM SATURDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
SOUTHEASTERN PENNSYLVANIA.

LAT...LON 4109 7503 4110 7500 4100 7489 4070 7507
      4091 7552 4109 7546 4111 7505
TIME...MOT...LOC 2150Z 293DEG 21KT 4097 7536

$$

MPD
2 follow-up statements
000 
WWUS51 KPHI 022222
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
622 PM EDT SAT AUG 2 2008

PAC089-022232-
/O.CAN.KPHI.SV.W.0203.000000T0000Z-080802T2245Z/
MONROE PA-
622 PM EDT SAT AUG 2 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MONROE COUNTY IS
CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEASTERN PENNSYLVANIA.

LAT...LON 4099 7490 4070 7507 4078 7524 4079 7525
      4089 7521 4101 7504 4105 7495
TIME...MOT...LOC 2222Z 302DEG 27KT 4084 7509

$$

NJC041-PAC095-022245-
/O.CON.KPHI.SV.W.0203.000000T0000Z-080802T2245Z/
WARREN NJ-NORTHAMPTON PA-
622 PM EDT SAT AUG 2 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR NORTHEASTERN NORTHAMPTON AND WESTERN WARREN COUNTIES...

AT 617 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR EAST BANGOR...OR 13 MILES NORTH OF EASTON...MOVING
SOUTHEAST AT 31 MPH.

THIS STORM ALSO WAS GENERATING DANGEROUS CLOUD TO GROUND LIGHTNING.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  7 MILES SOUTHWEST OF HOPE BY 630 PM EDT...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEASTERN PENNSYLVANIA.

LAT...LON 4099 7490 4070 7507 4078 7524 4079 7525
      4089 7521 4101 7504 4105 7495
TIME...MOT...LOC 2222Z 302DEG 27KT 4084 7509

$$

MPD
000 
WWUS51 KPHI 022237
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
637 PM EDT SAT AUG 2 2008

NJC041-PAC095-022247-
/O.EXP.KPHI.SV.W.0203.000000T0000Z-080802T2245Z/
WARREN NJ-NORTHAMPTON PA-
637 PM EDT SAT AUG 2 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NORTHAMPTON AND
WESTERN WARREN COUNTIES WILL EXPIRE AT 645 PM EDT...

THE THREAT FOR SEVERE WEATHER HAS DIMINISHED. THE WARNING HAS BEEN
ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEASTERN PENNSYLVANIA.

LAT...LON 4099 7490 4070 7507 4078 7524 4079 7525
      4089 7521 4101 7504 4105 7495
TIME...MOT...LOC 2237Z 302DEG 27KT 4078 7496

$$

MPD

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 6:55 AM EDTSpecial Marine WarningPHI65 min
Aug 2, 7:20 AM EDTSpecial Marine WarningPHI115 min
Aug 2, 7:40 AM EDTSevere Thunderstorm WarningPHICape May65 min
Aug 2, 8:08 AM EDTSevere Thunderstorm WarningPHIAtlantic52 min
Aug 2, 8:31 AM EDTSpecial Marine WarningPHI119 min
Aug 2, 9:22 AM EDTSpecial Marine WarningPHI24 min
Aug 2, 10:51 AM EDTAreal Flood AdvisoryPHISussex, Warren3 hr
Aug 2, 11:31 AM EDTSevere Thunderstorm WarningPHIHunterdon, Somerset59 min
Aug 2, 12:06 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Monmouth, Somerset54 min
Aug 2, 12:54 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth66 min
Aug 2, 1:22 PM EDTSpecial Marine WarningPHI53 min
Aug 2, 4:35 PM EDTSevere Thunderstorm WarningPHIBurlington55 min
Aug 2, 5:40 PM EDTSevere Thunderstorm WarningPHIOcean65 min
Aug 2, 5:58 PM EDTSpecial Marine WarningPHI62 min
Aug 2, 6:19 PM EDTSevere Thunderstorm WarningPHISussex, Warren56 min
Aug 2, 6:35 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset, Warren26 min
Aug 2, 10:29 AM EDTSevere Thunderstorm WarningPHICarbon, Lehigh, Monroe, Northampton44 min
Aug 2, 6:51 PM EDTSevere Thunderstorm WarningPHIBerks54 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2008Severe Thunderstorm Warnings in New Jersey, 2008Every severe thunderstorm warning in 2008

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.