Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 46, NWS Philadelphia/Mount Holly

June 13, 2014Berks County, Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 13, 2014, 1:48 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 57 min. 4 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: Jun 13, 2014, 1:48 PM EDT (17:48 UTC)
Expired: Jun 13, 2014, 2:45 PM EDT
In force: 57 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Berks County, PA, Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 124 km from the middle of the area, began a volume at 17:50 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 13, 1:50 PM EDT	TSTM WND DMG	Alsace Twp, PA	TREES REPORTED DOWN IN ALSACE.
Jun 13, 2:18 PM EDT	TSTM WND DMG	District Twp, PA	TREES REPORTED DOWN IN DISTRICT TOWNSHIP.
Jun 13, 2:53 PM EDT	TSTM WND GST 54	S Allentown, PA
Jun 13, 2:55 PM EDT	TSTM WND DMG	Allentown, PA	TREE AND WIRES DOWN IN ALLENTOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.8 hours before the alert went out and 228 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: 523 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 527 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 36 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.

358 
WUUS51 KPHI 131748 CCA
SVRPHI
PAC011-077-131845-
/O.NEW.KPHI.SV.W.0046.140613T1748Z-140613T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
148 PM EDT FRI JUN 13 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
  LEHIGH COUNTY IN EASTERN PENNSYLVANIA...

* UNTIL 245 PM EDT

* AT 146 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR LAURELDALE...MOVING
  NORTHEAST AT 20 MPH. THIS STORM IS CAPABLE OF PRODUCING DAMAGING
  WIND GUSTS AND HAIL. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FLEETWOOD AROUND 205 PM EDT...
  LYONS AROUND 215 PM EDT...
  KUTZTOWN AROUND 220 PM EDT...
  TOPTON AROUND 225 PM EDT...
  ANCIENT OAKS AROUND 240 PM EDT...
  CLAUSSVILLE AND EMMAUS AROUND 245 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

&&

LAT...LON 4038 7608 4074 7559 4072 7554 4059 7540
      4058 7541 4054 7535 4021 7593
TIME...MOT...LOC 1748Z 231DEG 19KT 4038 7589

$$
 
CORRECTED FOR REMOVAL OF EXTRA CHARACTER

1 follow-up statement

920 
WWUS51 KPHI 131809
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
209 PM EDT FRI JUN 13 2014

PAC011-077-131845-
/O.CON.KPHI.SV.W.0046.000000T0000Z-140613T1845Z/
BERKS PA-LEHIGH PA-
209 PM EDT FRI JUN 13 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR LEHIGH AND EASTERN BERKS COUNTIES...

AT 207 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES SOUTH OF
FLEETWOOD...OR 8 MILES NORTHEAST OF READING...MOVING NORTHEAST AT 20
MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  FLEETWOOD BY 215 PM EDT...
  LYONS AND 7 MILES SOUTHEAST OF KUTZTOWN BY 225 PM EDT...
  TOPTON BY 230 PM EDT...
  ALBURTIS...MACUNGIE...ANCIENT OAKS AND ZIONSVILLE BY 245 PM EDT...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

TORRENTIAL DOWNPOURS ARE ALSO OCCURRING WITH THIS STORM.
 
LAT...LON 4074 7559 4074 7558 4072 7554 4059 7540
      4058 7541 4054 7535 4030 7581 4045 7594
TIME...MOT...LOC 1809Z 231DEG 19KT 4038 7578

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 3:25 AM EDT	Special Weather Statement	PHI	Bucks, Lehigh	65 min
Jun 13, 4:28 AM EDT	Special Weather Statement	PHI	Lehigh, Northampton	62 min
Jun 13, 4:46 AM EDT	Areal Flood Advisory	PHI	Berks, Chester, Lehigh, Montgomery	3 hr
Jun 13, 6:17 AM EDT	River Flood Warning	PHI	Chester	4 hr
Jun 13, 6:41 AM EDT	Areal Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery	15 hr
Jun 13, 11:54 AM EDT	Flash Flood Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	11 hr
Jun 13, 12:36 PM EDT	Special Weather Statement	PHI	Berks	69 min
Jun 13, 1:25 PM EDT	Flash Flood Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	4 hr
Jun 13, 1:48 PM EDT	Flash Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery	4 hr
Jun 13, 2:16 PM EDT	Special Weather Statement	PHI	Carbon, Chester, Lehigh, Monroe, Northampton	119 min
Jun 13, 2:34 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	48 min
Jun 13, 2:42 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	63 min
Jun 13, 2:52 PM EDT	Areal Flood Advisory	PHI	Bucks, Monroe, Northampton	4 hr
Jun 13, 3:14 PM EDT	Special Weather Statement	PHI	Bucks, Monroe, Montgomery, Northampton	2 hr
Jun 13, 3:16 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Jun 13, 3:38 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	52 min
Jun 13, 3:52 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	53 min
Jun 13, 4:58 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	23 min
Jun 13, 5:04 PM EDT	Areal Flood Advisory	PHI	Bucks	4 hr

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; radar from the NEXRAD Level II archive.