Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 93, NWS Philadelphia/Mount Holly

June 27, 2007Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 27, 2007, 2:10 PM EDT for Monroe County, Northampton County, Pennsylvania. It was in force for 95 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
Jun 27, 2007, 2:10 PM EDT (18:10 UTC)
Expired
Jun 27, 2007, 3:45 PM EDT
In force
95 min
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

Counties 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
Jun 27, 12:58 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.2 hours before the alert went out and 165 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, Phillips Aaf/Abe, MD at 12:00Z on 2007-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1994 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2007-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.1939Sfc1 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
1994 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
955 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
-17 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 271811
SVRPHI
PAC089-095-271945-
/O.NEW.KPHI.SV.W.0093.070627T1810Z-070627T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
210 PM EDT WED JUN 27 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  SOUTH CENTRAL MONROE COUNTY IN NORTHEAST PENNSYLVANIA...

* UNTIL 345 PM EDT

* AT 208 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 IN
  EXTREME SOUTHEAST CARBON COUNTY AND 12 MILES WEST OF WIND GAP...
  OR ABOUT 18 MILES NORTHWEST OF BETHLEHEM...AND MOVING EAST AT 
  10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  8 MILES NORTH OF NAZARETH BY 310 PM EDT...
  WIND GAP BY 320 PM EDT...
  BELFAST BY 325 PM EDT...
  EAST BANGOR BY 345 PM EDT...

THUNDERSTORMS ARE CAPABLE OF PRODUCING HEAVY RAINFALL WHICH MAY
RESULT IN LOCALIZED AREAS OF FLOODING. DO NOT DRIVE IN AREAS WHERE
WATER IS CROSSING THE ROAD.

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 4093 7511 4077 7518 4075 7520 4074 7519
      4068 7522 4080 7554 4081 7550 4082 7548
      4087 7551 4088 7551 4089 7550 4094 7514

$$
 
TFG
1 follow-up statement
000 
WWUS51 KPHI 271901
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
300 PM EDT WED JUN 27 2007

PAC089-271908-
/O.CAN.KPHI.SV.W.0093.000000T0000Z-070627T1945Z/
MONROE PA-
300 PM EDT WED JUN 27 2007

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

AT 255 PM EDT...THE SEVERE THUNDERSTORM HAD MOVED TO THE SOUTH OF 
MONROE COUNTY. AS A RESULT...THE WARNING HAS BEEN CANCELLED.

LAT...LON 4093 7511 4077 7518 4075 7520 4074 7519
      4068 7522 4080 7554 4081 7550 4082 7548
      4083 7548 4081 7547 4094 7514

$$

PAC095-271945-
/O.CON.KPHI.SV.W.0093.000000T0000Z-070627T1945Z/
NORTHAMPTON PA-
300 PM EDT WED JUN 27 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR NORTHERN NORTHAMPTON COUNTY...

AT 255 PM 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 BELFAST...MOVING EAST 
AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BANGOR AND EAST BANGOR BY 305 PM EDT...

LAT...LON 4093 7511 4077 7518 4075 7520 4074 7519
      4068 7522 4080 7554 4081 7550 4082 7548
      4083 7548 4081 7547 4094 7514

$$

IOVINO

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 1:19 PM EDTSevere Thunderstorm WarningPHICarbon56 min
Jun 27, 3:42 PM EDTExcessive Heat WarningPHIDelaware, Philadelphia27 hr
Jun 27, 4:35 PM EDTSevere Thunderstorm WarningPHIChester46 min
Jun 27, 7:09 PM EDTSevere Thunderstorm WarningPHICarbon66 min
Jun 27, 7:58 PM EDTSevere Thunderstorm WarningPHILehigh62 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 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.