Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 19, NWS Philadelphia/Mount Holly

May 22, 2014Lehigh County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 22, 2014, 3:27 PM EDT for Lehigh County, Northampton County, Pennsylvania. It was in force for 33 min. 3 reports 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: May 22, 2014, 3:27 PM EDT (19:27 UTC)
Expired: May 22, 2014, 4:00 PM EDT
In force: 33 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Lehigh County, PA, Northampton County, PA

What was reported inside it

Time	Report	Where	Remark
May 22, 3:45 PM EDT	HAIL 1	Allentown, PA	AT U.S. ROUTE 222 AND SCHOENERSVILLE ROAD IN ALLENTOWN.
May 22, 3:45 PM EDT	HAIL 1	Allentown, PA	AND WIND GUSTS EST. 50 MPH.
May 22, 3:49 PM EDT	TSTM WND GST 59	Allentown Airport, PA

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
May 22, 12:39 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.5 hours before the alert went out and 221 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: 707 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 171 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.

932 
WUUS51 KPHI 221927
SVRPHI
PAC077-095-222000-
/O.NEW.KPHI.SV.W.0019.140522T1927Z-140522T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
327 PM EDT THU MAY 22 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
  SOUTHWESTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...

* UNTIL 400 PM EDT

* AT 323 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR BERLINSVILLE...MOVING SOUTH
  AT 20 MPH. THIS STORM IS CAPABLE OF PRODUCING ONE INCH DIAMETER
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  NORTHAMPTON AROUND 335 PM EDT...
  ALLENTOWN AROUND 350 PM EDT...
  EMMAUS AROUND 400 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS SEVERE THUNDERSTORM HAS A HISTORY OF PRODUCING MULTIPLE SIZE 
HAIL INCLUDING 1 INCH DIAMETER. STAY AWAY FROM WINDOWS! IF TIME 
ALLOWS...PUT AUTOMOBILES INTO A CARPORT OR GARAGE.

VERY HEAVY RAIN WILL ALSO OCCUR WITH THIS SEVERE THUNDERSTORM...WHICH
COULD FLOOD LOW LYING AREAS QUICKLY AND COVER ROADS WITH WATER. DO
NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM...AND
THE STORM WILL AFFECT THE BEACHES. FOR YOUR SAFETY...IMMEDIATELY MOVE
OFF THE BEACH AND SEEK SHELTER INDOORS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR NORTHERN NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4054 7534 4049 7557 4077 7558 4077 7550
TIME...MOT...LOC 1926Z 352DEG 17KT 4071 7553

$$

FORECASTER:  DRAG

1 follow-up statement

918 
WWUS51 KPHI 221944
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
344 PM EDT THU MAY 22 2014

PAC095-221954-
/O.CAN.KPHI.SV.W.0019.000000T0000Z-140522T2000Z/
NORTHAMPTON PA-
344 PM EDT THU MAY 22 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NORTHAMPTON
COUNTY IS CANCELLED...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF THE AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT 
THURSDAY EVENING FOR NORTHERN NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 4067 7548 4066 7548 4067 7543 4061 7539
      4059 7539 4058 7541 4054 7534 4050 7556
      4068 7552 4069 7550
TIME...MOT...LOC 1944Z 338DEG 33KT 4058 7543

$$

PAC077-222000-
/O.CON.KPHI.SV.W.0019.000000T0000Z-140522T2000Z/
LEHIGH PA-
344 PM EDT THU MAY 22 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR EASTERN LEHIGH COUNTY...

AT 340 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR FULLERTON...OR NEAR ALLENTOWN...MOVING SOUTH AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MACUNGIE...HOKENDAUQUA...FOUNTAIN HILL...COPLAY AND CATASAUQUA

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR NORTHERN NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4067 7548 4066 7548 4067 7543 4061 7539
      4059 7539 4058 7541 4054 7534 4050 7556
      4068 7552 4069 7550
TIME...MOT...LOC 1944Z 338DEG 33KT 4058 7543

$$

FORECASTER:  DRAG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 3:25 AM EDT	Special Weather Statement	PHI	Lehigh	65 min
May 22, 2:12 PM EDT	Special Weather Statement	PHI	Berks	63 min
May 22, 2:14 PM EDT	Severe Thunderstorm Warning	PHI	Berks	46 min
May 22, 2:29 PM EDT	Special Weather Statement	PHI	Carbon	46 min
May 22, 2:40 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	50 min
May 22, 2:50 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	55 min
May 22, 3:09 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	66 min
May 22, 3:21 PM EDT	Special Weather Statement	PHI	Northampton	24 min
May 22, 3:33 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	57 min
May 22, 3:51 PM EDT	Severe Thunderstorm Warning	PHI	Berks	39 min
May 22, 3:56 PM EDT	Special Weather Statement	PHI	Bucks	34 min
May 22, 4:13 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	62 min
May 22, 4:22 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	38 min
May 22, 4:22 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	53 min
May 22, 4:31 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware, Montgomery	44 min
May 22, 5:23 PM EDT	Special Weather Statement	PHI	Delaware	37 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.