Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 112, NWS Philadelphia/Mount Holly

June 17, 2011Sussex County, Warren County, New Jersey; Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 17, 2011, 1:48 PM EDT for Sussex County, Warren County, New Jersey; Monroe County, Pennsylvania. It was in force for 57 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
Jun 17, 2011, 1:48 PM EDT (17:48 UTC)
Expired
Jun 17, 2011, 2:45 PM EDT
In force
57 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Sussex County, NJ, Warren County, NJ, Monroe County, PA

The radar

The Philadelphia radar (KDIX), 141 km from the middle of the area, began a volume at 17:48 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
Jun 17, 2:08 PM EDTHAIL 0.25Blairstown, NJPEA SIZE HAIL

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 5.8 hours before the alert went out and 175 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 2011-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 307 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 2011-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 294 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
307 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
444 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
294 m²/s²
0-3 km storm-relative helicity
310 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.

194 
WUUS51 KPHI 171748
SVRPHI
NJC037-041-PAC089-171845-
/O.NEW.KPHI.SV.W.0112.110617T1748Z-110617T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
148 PM EDT FRI JUN 17 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  NORTHERN SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
  NORTH CENTRAL WARREN COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 245 PM EDT

* AT 144 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR DELAWARE WATER
  GAP...OR 14 MILES SOUTHEAST OF MOUNT POCONO...AND MOVING           
  NORTHEAST   AT 10 MPH. THIS STORM IS CAPABLE OF PRODUCING LARGE    
  HAIL AND WIND GUSTS IN EXCESS OF 58 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ECHO LAKE AROUND 210 PM EDT...
  6 MILES NORTHWEST OF BLAIRSTOWN AROUND 215 PM EDT...
  FLATBROOKVILLE AROUND 240 PM EDT...
  FIVE POINTS AND CRANDON LAKES AROUND 245 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4125 7447 4088 7507 4096 7513 4095 7518
      4102 7529 4116 7514 4115 7509 4109 7503
      4111 7495 4120 7488 4127 7484 4132 7479
      4135 7471 4135 7468
TIME...MOT...LOC 1748Z 241DEG 10KT 4102 7512

$$
JJM
1 follow-up statement
183 
WWUS51 KPHI 171821
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
221 PM EDT FRI JUN 17 2011

PAC089-171830-
/O.CAN.KPHI.SV.W.0112.000000T0000Z-110617T1845Z/
MONROE PA-
221 PM EDT FRI JUN 17 2011

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

SHOWERS AND A FEW THUNDERSTORMS ARE STILL POSSIBLE IN EASTERN MONROE 
COUNTY THROUGH THE NEXT HOUR OR SO, BUT THE SEVERE WEATHER AS MOVED 
OUT OF THE AREA.

LAT...LON 4125 7448 4088 7507 4096 7513 4099 7514
      4102 7505 4107 7497 4109 7499 4110 7498
      4111 7495 4115 7491 4127 7484 4132 7479
      4135 7468
TIME...MOT...LOC 1820Z 241DEG 10KT 4106 7502

$$

NJC037-041-171845-
/O.CON.KPHI.SV.W.0112.000000T0000Z-110617T1845Z/
SUSSEX NJ-WARREN NJ-
221 PM EDT FRI JUN 17 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR NORTH CENTRAL WARREN AND NORTHERN SUSSEX COUNTIES...

AT 218 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR
FLATBROOKVILLE...OR 14 MILES WEST OF NEWTON...MOVING NORTHEAST AT 20
MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  FLATBROOKVILLE BY 240 PM EDT...
  FIVE POINTS AND CRANDON LAKES BY 245 PM EDT...

LAT...LON 4125 7448 4088 7507 4096 7513 4099 7514
      4102 7505 4107 7497 4109 7499 4110 7498
      4111 7495 4115 7491 4127 7484 4132 7479
      4135 7468
TIME...MOT...LOC 1820Z 241DEG 10KT 4106 7502

$$

JJM

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 9:32 PM EDTCoastal Flood AdvisoryPHISalem4 hr
Jun 17, 2:00 AM EDTSpecial Weather StatementPHICape May60 min
Jun 17, 4:39 AM EDTSpecial Weather StatementPHIMercer, Middlesex, Somerset51 min
Jun 17, 1:30 PM EDTSpecial Weather StatementPHISussex, Warren60 min
Jun 17, 1:45 PM EDTSpecial Weather StatementPHIMorris45 min
Jun 17, 3:31 PM EDTSpecial Weather StatementPHIMiddlesex59 min
Jun 17, 3:45 PM EDTSpecial Weather StatementPHICumberland, Gloucester, Salem60 min
Jun 17, 4:48 PM EDTSpecial Weather StatementPHIMonmouth57 min
Jun 17, 7:35 PM EDTSpecial Marine WarningPHI25 min
Jun 17, 4:05 AM EDTSpecial Weather StatementPHIPhiladelphia55 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2011Severe Thunderstorm Warnings in Pennsylvania, 2011Every severe thunderstorm warning in 2011

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.