Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 17, NWS Philadelphia/Mount Holly

May 22, 2014Berks County, Chester County, Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 22, 2014, 2:50 PM EDT for Berks County, Chester County, Montgomery County, Pennsylvania. It was in force for 55 min. 6 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, 2:50 PM EDT (18:50 UTC)
Expired: May 22, 2014, 3:45 PM EDT
In force: 55 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Berks County, PA, Chester County, PA, Montgomery County, PA

What was reported inside it

Time	Report	Where
May 22, 3:10 PM EDT	HAIL 0.75	Reading, PA
May 22, 3:10 PM EDT	HAIL 1	Reading, PA
May 22, 3:10 PM EDT	HAIL 1.5	Reading, PA
May 22, 3:12 PM EDT	HAIL 1.75	Reading, PA
May 22, 3:14 PM EDT	HAIL 1	Exeter Twp, PA
May 22, 3:15 PM EDT	HAIL 0.75	Saint Lawrence, 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.8 hours before the alert went out and 191 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: 291 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 839 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

275 
WUUS51 KPHI 221850
SVRPHI
PAC011-029-091-221945-
/O.NEW.KPHI.SV.W.0017.140522T1850Z-140522T1945Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
  WEST CENTRAL MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
  NORTHERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...

* UNTIL 345 PM EDT

* AT 245 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR FAIRVIEW HGTS...MOVING
  SOUTHEAST AT 40 MPH. THIS STORM IS CAPABLE OF PRODUCING GOLF BALL
  SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  READING AND WYOMISSING AROUND 255 PM EDT...
  BIRDSBORO AND NEW MORGAN AROUND 310 PM EDT...
  ELVERSON AND HONEY BROOK AROUND 315 PM EDT...
  PUGHTOWN AND CEDARVILLE AROUND 320 PM EDT...
  CHESTER SPRINGS AND LIONVILLE AROUND 330 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS TODAY HAVE HAD A HISTORY OF PRODUCING LARGE HAIL
STAY AWAY FROM WINDOWS! IF TIME ALLOWS...PUT AUTOMOBILES INTO A 
CARPORT OR GARAGE.
 
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS SEVERE
THUNDERSTORM. WHEN THUNDER ROARS...MOVE INDOORS! 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. A
SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT
THURSDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY.

&&

LAT...LON 4047 7590 4015 7539 3993 7583 4009 7595
      4012 7593 4014 7589 4027 7609 4031 7612
TIME...MOT...LOC 1849Z 316DEG 37KT 4039 7601

$$

TFG

2 follow-up statements

646 
WWUS51 KPHI 221903
SVSPHI

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

PAC011-029-091-221945-
/O.CON.KPHI.SV.W.0017.000000T0000Z-140522T1945Z/
BERKS PA-MONTGOMERY PA-CHESTER PA-
303 PM EDT THU MAY 22 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR NORTHERN CHESTER...WEST CENTRAL MONTGOMERY AND SOUTH CENTRAL
BERKS COUNTIES...

AT 258 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR READING...MOVING SOUTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
READING AND KENHORST AROUND 310 PM EDT...
LORANE AND FLYING HILLS AROUND 315 PM EDT...
BIRDSBORO AROUND 320 PM EDT...
NEW MORGAN AND AMITY GARDENS AROUND 325 PM EDT...
ELVERSON AND STOWE AROUND 330 PM EDT...
CEDARVILLE AND SOUTH POTTSTOWN AROUND 335 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS TODAY HAVE HAD A HISTORY OF PRODUCING LARGE HAIL.
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE...AND STAY AWAY FROM
WINDOWS. DAMAGING WINDS ARE ALSO LIKELY.

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 4027 7606 4033 7609 4044 7594 4015 7539
      3993 7583 4009 7595 4012 7593 4014 7589
TIME...MOT...LOC 1901Z 316DEG 28KT 4037 7598

$$
 
TFG

949 
WWUS51 KPHI 221928
SVSPHI

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

PAC011-029-091-221945-
/O.CON.KPHI.SV.W.0017.000000T0000Z-140522T1945Z/
BERKS PA-MONTGOMERY PA-CHESTER PA-
328 PM EDT THU MAY 22 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR NORTH CENTRAL CHESTER...WEST CENTRAL MONTGOMERY AND SOUTH CENTRAL
BERKS COUNTIES...

AT 325 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED NEAR BIRDSBORO...OR 9 MILES SOUTHEAST OF
READING...MOVING SOUTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
CEDARVILLE AND SOUTH POTTSTOWN AROUND 335 PM EDT...
PUGHTOWN AND GLENMOORE AROUND 340 PM EDT...
SPRING CITY AND ROYERSFORD AROUND 345 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HAIL UP TO GOLF BALL SIZE HAS BEEN REPORTED NEAR READING.
FROM THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...
TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

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 4001 7580 4008 7584 4011 7586 4014 7589
      4023 7593 4030 7594 4037 7581 4031 7568
      4019 7546
TIME...MOT...LOC 1927Z 316DEG 28KT 4022 7580

$$

TFG

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, 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, 3:27 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	33 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.