Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 116, NWS Philadelphia/Mount Holly

July 13, 20144 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 13, 2014, 8:33 PM EDT for 4 counties in Pennsylvania. It was in force for 57 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: Jul 13, 2014, 8:33 PM EDT (00:33 UTC)
Expired: Jul 13, 2014, 9:30 PM EDT
In force: 57 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA

The radar

The Binghamton radar (KBGM), 141 km from the middle of the area, began a volume at 00:33 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jul 13, 7:49 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.6 hours before the alert went out and 234 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: 30 J/kg
Mixed-layer CIN: -231 J/kg
Mixed-layer LCL: 891 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

355 
WUUS51 KPHI 140033
SVRPHI
PAC025-077-089-095-140130-
/O.NEW.KPHI.SV.W.0116.140714T0033Z-140714T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
833 PM EDT SUN JUL 13 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
  MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
  WEST CENTRAL NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...

* UNTIL 930 PM EDT

* AT 831 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  BRIGGSVILLE TO NUREMBURG TO TREMONT...MOVING EAST AT 45 MPH. THESE
  STORMS ARE CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  WEATHERLY AND NESQUEHONING AROUND 900 PM EDT...
  LAKE HARMONY AND BLAKESLEE AROUND 910 PM EDT...
  ARROWHEAD LAKE AND WANAMAKERS AROUND 915 PM EDT...
  POCONO PINES AND GOULSBORO STATE PARK AROUND 920 PM EDT...
  BERLINSVILLE AND WALNUTPORT AROUND 925 PM EDT...
  BRODHEADSVILLE AND DANIELSVILLE AROUND 930 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE WINDS OF MORE THAN 57 MPH...OR HAIL ONE
INCH OR LARGER.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
SUNDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4095 7520 4064 7551 4063 7583 4068 7589
      4074 7577 4084 7592 4092 7600 4100 7575
      4102 7574 4105 7578 4110 7576 4114 7569
      4113 7564 4121 7557 4126 7513
TIME...MOT...LOC 0032Z 267DEG 37KT 4104 7613 4091 7619
          4067 7642

$$

FORECASTER:  DRAG

1 follow-up statement

977 
WWUS51 KPHI 140108
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
908 PM EDT SUN JUL 13 2014

PAC025-077-089-095-140130-
/O.CON.KPHI.SV.W.0116.000000T0000Z-140714T0130Z/
LEHIGH PA-MONROE PA-CARBON PA-NORTHAMPTON PA-
908 PM EDT SUN JUL 13 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR WEST CENTRAL NORTHAMPTON...CARBON...MONROE AND NORTHERN LEHIGH
COUNTIES...

AT 904 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 7 MILES NORTH OF WEATHERLY TO WEATHERLY TO 11 MILES
WEST OF WANAMAKERS...OR ALONG A LINE EXTENDING FROM 10 MILES
SOUTHEAST OF MOUNTAIN TOP TO 8 MILES EAST OF HAZLETON TO 6 MILES EAST
OF SCHUYLKILL HAVEN...MOVING EAST AT 45 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  JIM THORPE...NEW MAHONING AND CHRISTMANS BY 915 PM EDT...
  LAKE HARMONY...BLAKESLEE...WEISSPORT AND WEISSPORT EAST BY 920 PM
  EDT...
  POCONO RACEWAY...LONG POND AND POCONO PINES BY 925 PM EDT...

BRIEF TORRENTIAL RAINS WILL OCCUR WITH THESE STORMS AS WELL. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
SUNDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 4095 7520 4064 7551 4063 7582 4065 7585
      4068 7589 4074 7577 4084 7592 4093 7592
      4100 7575 4102 7574 4105 7578 4110 7576
      4114 7569 4113 7564 4121 7556 4126 7514
TIME...MOT...LOC 0107Z 267DEG 37KT 4104 7575 4095 7578
          4065 7602

$$

DRAG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 8:04 PM EDT	Special Weather Statement	PHI	Carbon	71 min
Jul 13, 8:41 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	2 hr
Jul 13, 9:04 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	56 min
Jul 13, 9:16 PM EDT	Special Weather Statement	PHI	Northampton	89 min
Jul 13, 9:33 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	57 min
Jul 13, 9:44 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Northampton	46 min
Jul 13, 10:06 PM EDT	Special Weather Statement	PHI	Berks	54 min
Jul 13, 10:14 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	46 min
Jul 13, 10:41 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	2 hr
Jul 13, 10:48 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	37 min
Jul 13, 11:07 PM EDT	Special Weather Statement	PHI	Bucks, Montgomery	38 min
Jul 13, 11:21 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	54 min
Jul 13, 11:27 PM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery	2 hr
Jul 14, 3:54 AM EDT	Flash Flood Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	45 hr
Jul 14, 3:43 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	62 min
Jul 14, 4:38 PM EDT	Areal Flood Advisory	PHI	Chester	3 hr
Jul 14, 4:50 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	4 hr
Jul 14, 5:06 PM EDT	Special Weather Statement	PHI	Bucks	54 min
Jul 14, 5:09 PM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery	3 hr
Jul 14, 5:16 PM EDT	Special Weather Statement	PHI	Lehigh, Northampton	59 min
Jul 14, 5:31 PM EDT	Flash Flood Warning	PHI	Bucks, Lehigh, Northampton	3 hr
Jul 14, 7:39 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Montgomery, Philadelphia	3 hr
Jul 14, 7:53 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	67 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2014 Every severe thunderstorm warning in 2014

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.