Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 93, NWS Philadelphia/Mount Holly

June 26, 2009Carbon County, Monroe County, Northampton County, Pennsylvania; Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 26, 2009, 4:51 PM EDT for Carbon County, Monroe County, Northampton County, Pennsylvania; Warren County, New Jersey. It was in force for 69 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 26, 2009, 4:51 PM EDT (20:51 UTC)
Expired: Jun 26, 2009, 6:00 PM EDT
In force: 69 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 20:50 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
Jun 26, 5:57 PM EDT	TSTM WND DMG	4 S Great Meadows-Vienn, NJ	WIRES DOWN IN MANSFIELD 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.

Issued	Product	Office	Lasted
Jun 26, 2:42 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.9 hours before the alert went out and 180 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: 4 J/kg
Mixed-layer CIN: -380 J/kg
Mixed-layer LCL: 1367 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 70 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 262051
SVRPHI
NJC041-PAC025-089-095-262200-
/O.NEW.KPHI.SV.W.0093.090626T2051Z-090626T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
451 PM EDT FRI JUN 26 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 600 PM EDT

* AT 447 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 9 MILES NORTHEAST OF ECHO LAKE
  TO EAST STROUDSBURG TO GILBERT TO 9 MILES WEST OF BELTZVILLE 
  STATE PARK...AND MOVING EAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  GILBERT...ECHO LAKE AND BRODHEADSVILLE AROUND 455 PM EDT...
  STORMVILLE AND EAST STROUDSBURG AROUND 500 PM EDT...
  SAYLORSBURG...BELTZVILLE STATE PARK AND DELAWARE WATER GAP AROUND
  505 PM EDT...
  ROSSLAND AND DANIELSVILLE AROUND 510 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 1000 PM EDT
FRIDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4109 7503 4110 7499 4109 7499 4107 7495
      4091 7477 4087 7481 4083 7482 4079 7486
      4079 7488 4071 7496 4065 7510 4085 7575
      4111 7505
TIME...MOT...LOC 2050Z 289DEG 32KT 4118 7494 4105 7521
          4095 7544 4090 7574

$$

SZATKOWSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 3:31 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	59 min
Jun 26, 3:53 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	82 min
Jun 26, 5:35 PM EDT	Severe Thunderstorm Warning	PHI	Berks	55 min
Jun 26, 6:01 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	59 min
Jun 26, 6:16 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh	59 min
Jun 26, 6:23 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	52 min
Jun 26, 6:30 PM EDT	Severe Thunderstorm Warning	PHI	Berks	45 min
Jun 26, 6:41 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	41 min
Jun 26, 6:57 PM EDT	Severe Thunderstorm Warning	PHI	Montgomery, Philadelphia	48 min
Jun 26, 7:10 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	50 min
Jun 26, 7:15 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	60 min
Jun 26, 7:28 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	92 min
Jun 26, 7:30 PM EDT	Severe Thunderstorm Warning	PHI	Berks	45 min
Jun 26, 7:45 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	65 min
Jun 26, 4:34 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	86 min
Jun 26, 5:27 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset	78 min
Jun 26, 6:39 PM EDT	Special Marine Warning	PHI		51 min
Jun 26, 6:45 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	30 min
Jun 26, 7:18 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Ocean	72 min
Jun 26, 7:56 PM EDT	Special Marine Warning	PHI		64 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2009 Severe Thunderstorm Warnings in New Jersey, 2009 Every severe thunderstorm warning in 2009

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.