Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 115, NWS Philadelphia/Mount Holly

October 9, 20155 counties in Pennsylvania; Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 9, 2015, 3:17 PM EDT for 5 counties in Pennsylvania; Warren County, New Jersey. It was in force for 58 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: Oct 9, 2015, 3:17 PM EDT (19:17 UTC)
Expired: Oct 9, 2015, 4:15 PM EDT
In force: 58 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Philadelphia radar (KDIX), 143 km from the middle of the area, began a volume at 19:19 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.3 hours before the alert went out and 222 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 816 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 245 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.

501 
WUUS51 KPHI 091917
SVRPHI
NJC041-PAC011-025-077-089-095-092015-
/O.NEW.KPHI.SV.W.0115.151009T1917Z-151009T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
317 PM EDT FRI OCT 9 2015

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN WARREN COUNTY IN NORTHWESTERN NEW JERSEY...
  NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
  MONROE COUNTY IN NORTHEASTERN PENNSYLVANIA...
  NORTHEASTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
  CARBON COUNTY IN NORTHEASTERN PENNSYLVANIA...

* UNTIL 415 PM EDT

* AT 316 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM NEAR
  POCONO PINES TO LOCUST LAKE STATE PARK...AND MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ALLENTOWN...LEHIGHTON...MOUNT POCONO...BETHLEHEM...NORTHAMPTON...
  EAST STROUDSBURG...TOBYHANNA...BLAIRSTOWN...NAZARETH...PALMERTON...
  BANGOR...JIM THORPE...SLATINGTON...PEN ARGYL...NESQUEHONING...WIND
  GAP...BATH...WEATHERLY...WALNUTPORT AND HOPE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...DEADLY
LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

LAT...LON 4113 7506 4108 7503 4110 7497 4098 7484
      4052 7563 4065 7597 4070 7583 4074 7576
      4083 7590 4091 7599 4101 7573 4105 7576
      4121 7548
TIME...MOT...LOC 1916Z 289DEG 30KT 4115 7548 4079 7611 

$$

SZATKOWSKI

1 follow-up statement

457 
WWUS51 KPHI 091946
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
346 PM EDT FRI OCT 9 2015

NJC041-PAC011-025-077-089-095-092015-
/O.CON.KPHI.SV.W.0115.000000T0000Z-151009T2015Z/
WARREN NJ-NORTHAMPTON PA-LEHIGH PA-MONROE PA-BERKS PA-CARBON PA-
346 PM EDT FRI OCT 9 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR NORTHERN WARREN...NORTHAMPTON...LEHIGH...CENTRAL MONROE...
NORTHEASTERN BERKS AND CARBON COUNTIES...

AT 345 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM ANALOMINK
TO SNYDERS...MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
ALLENTOWN...LEHIGHTON...BETHLEHEM...NORTHAMPTON...EAST STROUDSBURG...
BLAIRSTOWN...NAZARETH...PALMERTON...BANGOR...JIM THORPE...
SLATINGTON...PEN ARGYL...NESQUEHONING...WIND GAP...BATH...
WEATHERLY...WALNUTPORT...HOPE...BELFAST AND TATAMY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

LAT...LON 4113 7506 4108 7503 4110 7497 4098 7484
      4052 7563 4065 7597 4070 7583 4074 7576
      4083 7590 4091 7599 4101 7573 4109 7541
TIME...MOT...LOC 1945Z 289DEG 30KT 4108 7521 4072 7584 

$$

SZATKOWSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 9, 2:45 PM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	90 min
Oct 9, 4:01 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	44 min
Oct 9, 4:39 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware, Montgomery, Philadelphia	51 min
Oct 9, 4:47 PM EDT	Tornado Warning	PHI	Chester, Montgomery	28 min
Oct 9, 5:25 PM EDT	Special Weather Statement	PHI	Bucks, Montgomery	65 min
Oct 9, 5:41 PM EDT	Special Weather Statement	PHI	Philadelphia	49 min
Oct 9, 5:43 PM EDT	Special Marine Warning	PHI		92 min
Oct 9, 5:47 PM EDT	Special Marine Warning	PHI		88 min
Oct 9, 6:04 PM EDT	Special Weather Statement	PHI	Atlantic, Cumberland, Gloucester, Salem	56 min
Oct 9, 6:08 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Mercer, Middlesex, Monmouth, Ocean	52 min
Oct 9, 6:53 PM EDT	Special Marine Warning	PHI		2 hr
Oct 9, 6:55 PM EDT	Special Weather Statement	PHI	Cape May, Cumberland	95 min
Oct 9, 6:58 PM EDT	Special Weather Statement	PHI	Atlantic, Ocean	62 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2015 Severe Thunderstorm Warnings in New Jersey, 2015 Every severe thunderstorm warning in 2015

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; radar from the NEXRAD Level II archive.