Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 207, NWS Philadelphia/Mount Holly

August 17, 2007Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 17, 2007, 4:45 PM EDT for Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania. It was in force for 60 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
Aug 17, 2007, 4:45 PM EDT (20:45 UTC)
Expired
Aug 17, 2007, 5:45 PM EDT
In force
60 min
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 17, 1:37 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.8 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2007-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 120 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2007-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 square meters per square second.1939587897Sfc1 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
120 J/kg
Mixed-layer CIN
-267 J/kg
Mixed-layer LCL
1465 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
-31 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.4

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 172046
SVRPHI
NJC041-PAC089-095-172145-
/O.NEW.KPHI.SV.W.0207.070817T2045Z-070817T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
445 PM EDT FRI AUG 17 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 545 PM EDT

* AT 445 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR STORMVILLE...OR ABOUT 22 MILES NORTH OF
  BETHLEHEM...AND MOVING EAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ANALOMINK...EAST BANGOR...EAST STROUDSBURG...HARMONY...ROXBURG...
  COLUMBIA...BELVIDERE...BRASS CASTLE...PLEASANT VALLEY...OXFORD...
  WASHINGTON...BLAIRSTOWN...HOPE...GREAT MEADOWS-VIENNA AND
  ALLAMUCHY-PANTHER VALLEY

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FRIDAY
EVENING FOR NORTHERN DELAWARE AND NEW JERSEY AND EASTERN
PENNSYLVANIA.

LAT...LON 4096 7482 4091 7477 4068 7508 4087 7549
      4104 7541 4106 7497
TIME...MOT...LOC 2045Z 270DEG 66KT 4095 7529

$$

JJM
1 follow-up statement
000 
WWUS51 KPHI 172109
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
508 PM EDT FRI AUG 17 2007

PAC089-172118-
/O.CAN.KPHI.SV.W.0207.000000T0000Z-070817T2145Z/
MONROE PA-
508 PM EDT FRI AUG 17 2007

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

THUNDERSTORMS RESPONSIBLE FOR SEVERE WEATHER HAVE MOVED OUT OF 
MONROE COUNTY. THE SEVERE THUNDERSTORM HAS THEREFORE BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FRIDAY
EVENING FOR NORTHERN DELAWARE AND NEW JERSEY AND EASTERN
PENNSYLVANIA.

LAT...LON 4097 7483 4096 7483 4091 7477 4070 7512
      4083 7540 4085 7537 4085 7534 4085 7533
      4088 7527 4106 7497
TIME...MOT...LOC 2108Z 266DEG 40KT 4074 7541

$$

NJC041-PAC095-172145-
/O.CON.KPHI.SV.W.0207.000000T0000Z-070817T2145Z/
WARREN NJ-NORTHAMPTON PA-
508 PM EDT FRI AUG 17 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHEASTERN NORTHAMPTON AND WARREN COUNTIES...

AT 506 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.
THIS STORM WAS LOCATED 9 MILES WEST OF BELFAST...OR ABOUT 9 MILES 
NORTHWEST OF BETHLEHEM...MOVING EAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WIND
GAP...PEN ARGYL...ROSETO...BANGOR...EAST BANGOR...HARMONY...
ROXBURG...PORTLAND...COLUMBIA...BELVIDERE...OXFORD...BLAIRSTOWN...
HOPE...GREAT MEADOWS...GREAT MEADOWS-VIENNA...ALLAMUCHY AND
ALLAMUCHY-PANTHER VALLEY

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FRIDAY
EVENING FOR NORTHERN DELAWARE AND NEW JERSEY AND EASTERN
PENNSYLVANIA.

LAT...LON 4097 7483 4096 7483 4091 7477 4070 7512
      4083 7540 4085 7537 4085 7534 4085 7533
      4088 7527 4106 7497
TIME...MOT...LOC 2108Z 266DEG 40KT 4074 7541

$$

JJM

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 16, 10:32 PM EDTSpecial Marine WarningPHI43 min
Aug 16, 11:12 PM EDTSpecial Marine WarningPHI63 min
Aug 16, 11:27 PM EDTSpecial Marine WarningPHI48 min
Aug 16, 11:36 PM EDTSpecial Marine WarningPHI39 min
Aug 17, 12:29 AM EDTSpecial Marine WarningPHI46 min
Aug 17, 2:20 PM EDTSevere Thunderstorm WarningPHIWarren70 min
Aug 17, 2:43 PM EDTSevere Thunderstorm WarningPHIHunterdon62 min
Aug 17, 3:05 PM EDTSevere Thunderstorm WarningPHIGloucester55 min
Aug 17, 3:17 PM EDTTornado WarningPHIWarren43 min
Aug 17, 3:20 PM EDTSevere Thunderstorm WarningPHISomerset55 min
Aug 17, 3:36 PM EDTSevere Thunderstorm WarningPHIMiddlesex69 min
Aug 17, 3:46 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris49 min
Aug 17, 3:59 PM EDTSpecial Marine WarningPHI2 hr
Aug 17, 4:09 PM EDTSevere Thunderstorm WarningPHICamden36 min
Aug 17, 4:11 PM EDTSevere Thunderstorm WarningPHIMonmouth49 min
Aug 17, 5:17 PM EDTSevere Thunderstorm WarningPHIHunterdon58 min
Aug 17, 5:41 PM EDTSevere Thunderstorm WarningPHIMorris64 min
Aug 17, 5:46 PM EDTSevere Thunderstorm WarningPHISomerset59 min
Aug 17, 6:27 PM EDTSpecial Marine WarningPHI93 min
Aug 17, 6:40 PM EDTSevere Thunderstorm WarningPHIMonmouth35 min
Aug 17, 7:47 PM EDTSevere Thunderstorm WarningPHIMonmouth58 min
Aug 17, 1:48 PM EDTSevere Thunderstorm WarningPHIChester72 min
Aug 17, 2:07 PM EDTSevere Thunderstorm WarningPHICarbon68 min
Aug 17, 2:14 PM EDTTornado WarningPHIChester46 min
Aug 17, 2:19 PM EDTTornado WarningPHICarbon26 min
Aug 17, 2:36 PM EDTSevere Thunderstorm WarningPHIDelaware54 min
Aug 17, 2:41 PM EDTSevere Thunderstorm WarningPHIMonroe, Northampton79 min
Aug 17, 2:45 PM EDTTornado WarningPHICarbon, Northampton45 min
Aug 17, 2:54 PM EDTSevere Thunderstorm WarningPHILehigh66 min
Aug 17, 4:42 PM EDTSevere Thunderstorm WarningPHICarbon19 min
Aug 17, 4:51 PM EDTSevere Thunderstorm WarningPHILehigh, Northampton43 min
Aug 17, 7:56 PM EDTSevere Thunderstorm WarningPHIMontgomery19 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2007Severe Thunderstorm Warnings in New Jersey, 2007Every severe thunderstorm warning in 2007

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.