Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 74, NWS Philadelphia/Mount Holly

June 24, 2010Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 24, 2010, 1:59 PM EDT for Berks County, Pennsylvania. It was in force for 66 min. 1 report 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 24, 2010, 1:59 PM EDT (17:59 UTC)
Expired: Jun 24, 2010, 3:05 PM EDT
In force: 66 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 138 km from the middle of the area, began a volume at 18:00 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 24, 2:45 PM EDT	TSTM WND DMG	3 Sse Flying Hills, PA	TREES DOWN IN ROBESON TWP.

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
Jun 24, 12:28 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.0 hours before the alert went out and 98 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: 126 J/kg
Mixed-layer CIN: -170 J/kg
Mixed-layer LCL: 1592 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 65 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.

460 
WUUS51 KPHI 241759
SVRPHI
PAC011-241915-
/O.NEW.KPHI.SV.W.0074.100624T1759Z-100624T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
159 PM EDT THU JUN 24 2010

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
  THIS INCLUDES THE CITY OF READING...

* UNTIL 315 PM EDT

* AT 155 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 16
  MILES WEST OF WOMELSDORF...OR 26 MILES NORTHWEST OF LANCASTER...AND
  MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WOMELSDORF AROUND 220 PM EDT...
  WERNERSVILLE AROUND 230 PM EDT...
  SINKING SPRING AND WYOMISSING AROUND 240 PM EDT...
  READING AROUND 245 PM EDT...
  NEW MORGAN AROUND 255 PM EDT...
  BIRDSBORO AROUND 300 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM EDT
THURSDAY EVENING FOR NORTHEAST PENNSYLVANIA. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM EDT THURSDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND SOUTHEASTERN
PENNSYLVANIA.

&&

LAT...LON 4040 7557 4024 7570 4014 7590 4036 7621
      4036 7624 4049 7642
TIME...MOT...LOC 1759Z 286DEG 31KT 4038 7645

$$

KRUZDLO

2 follow-up statements

444 
WWUS51 KPHI 241834
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
234 PM EDT THU JUN 24 2010

PAC011-241915-
/O.CON.KPHI.SV.W.0074.000000T0000Z-100624T1915Z/
BERKS PA-
234 PM EDT THU JUN 24 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR SOUTHERN BERKS COUNTY...

AT 229 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR MOHNTON...OR 9 MILES SOUTHWEST OF READING...MOVING EAST
AT 40 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  FLYING HILLS...7 MILES SOUTH OF REIFFTON...7 MILES SOUTH OF MOUNT
  PENN AND 8 MILES SOUTH OF ST. LAWRENCE BY 240 PM EDT...
  NEW MORGAN AND 6 MILES SOUTH OF LORANE BY 245 PM EDT...
  BIRDSBORO BY 250 PM EDT...
  6 MILES SOUTH OF AMITY GARDENS BY 255 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM EDT
THURSDAY EVENING FOR NORTHEAST PENNSYLVANIA. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM EDT THURSDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND SOUTHEASTERN
PENNSYLVANIA.

&&

LAT...LON 4040 7557 4024 7570 4014 7590 4036 7621
      4036 7624 4049 7642
TIME...MOT...LOC 1833Z 287DEG 35KT 4025 7602

$$

KRUZDLO

344 
WWUS51 KPHI 241905
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
305 PM EDT THU JUN 24 2010

PAC011-241914-
/O.CAN.KPHI.SV.W.0074.000000T0000Z-100624T1915Z/
BERKS PA-
305 PM EDT THU JUN 24 2010

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BERKS COUNTY IS
CANCELLED...

THE SEVERE THUNDERSTORM HAS MOVED TO THE SOUTHEAST OF BERKS COUNTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM.

LAT...LON 4040 7557 4024 7570 4014 7590 4036 7621
      4036 7624 4049 7642
TIME...MOT...LOC 1904Z 287DEG 35KT 4016 7564

$$

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 24, 12:36 PM EDT	Special Weather Statement	PHI	Monroe	54 min
Jun 24, 1:16 PM EDT	Special Weather Statement	PHI	Monroe	59 min
Jun 24, 2:31 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	59 min
Jun 24, 2:56 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	64 min
Jun 24, 3:13 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	62 min
Jun 24, 3:29 PM EDT	Severe Thunderstorm Warning	PHI	Chester	61 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2010 Every severe thunderstorm warning in 2010

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.