Alert archive / Pennsylvania / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

August 1, 2011Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 1, 2011, 3:46 PM EDT for Berks County, Pennsylvania. It was in force for 89 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: Aug 1, 2011, 3:46 PM EDT (19:46 UTC)
Expired: Aug 1, 2011, 5:15 PM EDT
In force: 89 min
Issued by: NWS Philadelphia/Mount Holly

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 157 km from the middle of the area, began a volume at 19:48 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
Aug 1, 4:17 PM EDT	HAIL 0.25	Lower Alsace Twp, PA	PEA SIZE HAIL REPORTED IN LOWER ALSACE TWP.
Aug 1, 4:25 PM EDT	TSTM WND DMG	Oley, PA	TREE REPORTED DOWN IN OLEY.
Aug 1, 4:34 PM EDT	TSTM WND DMG	Tulpehocken Twp, PA	TREE REPORTED DOWN IN TULPEHOCKEN.

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.8 hours before the alert went out and 117 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: 307 J/kg
Mixed-layer CIN: -150 J/kg
Mixed-layer LCL: 1512 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -192 m²/s²
0-3 km storm-relative helicity: -166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.5

Open this sounding in Storm Lab

The text

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

559 
WWUS81 KPHI 011946
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
346 PM EDT MON AUG 1 2011

PAZ060-061-012115-
BERKS PA-LEHIGH PA-
346 PM EDT MON AUG 1 2011

...STRONG POSSIBLY SEVERE THUNDERSTORMS WILL AFFECT BERKS AND  
LEHIGH COUNTIES...

AT 339 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG TO LOCALLY SEVERE THUNDERSTORMS ALONG A LINE EXTENDING 
FROM 31 MILES WEST OF LEHIGHTON TO 36 MILES NORTHWEST OF READING TO 
20 MILES NORTHWEST OF READING...MOVING SOUTHEAST AT 20 MPH. THE 
THUNDERSTORMS WILL BE NEAR WOMELSDORF AROUND 400 
PM...WERNERSVILLE...STRAUSSTOWN AROUND 415 PM...WHITFIELD...SINKING 
SPRING AROUND 430 PM...WYOMISSING HILLS...WYOMISSING AROUND 445 
PM...WANAMAKERS AND NEW MORGAN AROUND 500 PM.

WIND GUSTS TO 40 TO  50 MPH ARE POSSIBLE WITH THESE STORMS.

EXPECT HAIL AND FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING FROM 
THESE STORMS.

A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR SCHUYLKILL COUNTY
AND A WARNING MAY BECOME NECESSARY FOR BERKS OR LEHIGH COUNTIES IF
SOME OF THE PRESENT STORMS MAINTAIN THEIR INTENSITY.

PLEASE SEEK SHELTER AT THE FIRST SIGHT OF THREATENING WEATHER.


LAT...LON 4053 7634 4052 7630 4054 7618 4056 7615
      4058 7609 4060 7605 4059 7603 4064 7600
      4070 7585 4047 7550 4016 7586 4042 7629
      4052 7635

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 10:13 PM EDT	Special Weather Statement	PHI	Hunterdon, Middlesex, Somerset	62 min
Jul 31, 10:58 PM EDT	Special Weather Statement	PHI	Morris	62 min
Aug 1, 1:49 AM EDT	Special Marine Warning	PHI		56 min
Aug 1, 1:50 AM EDT	Special Weather Statement	PHI	Monmouth	55 min
Aug 1, 1:35 PM EDT	Special Weather Statement	PHI	Morris, Sussex, Warren	3 hr
Aug 1, 2:11 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	94 min
Aug 1, 2:44 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	29 min
Aug 1, 4:09 PM EDT	Special Weather Statement	PHI	Camden	66 min
Aug 1, 5:06 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	69 min
Aug 1, 5:50 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	70 min
Aug 1, 6:03 PM EDT	Special Marine Warning	PHI		57 min
Aug 1, 6:16 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	59 min
Aug 1, 6:17 PM EDT	Areal Flood Advisory	PHI	Camden, Gloucester	3 hr
Aug 1, 6:20 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	46 min
Aug 1, 6:47 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Gloucester, Salem	73 min
Aug 1, 7:01 PM EDT	Areal Flood Advisory	PHI	Atlantic, Cumberland, Gloucester, Salem	119 min
Aug 1, 7:07 PM EDT	Special Marine Warning	PHI		83 min
Aug 1, 7:12 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	59 min
Aug 1, 7:17 PM EDT	Special Marine Warning	PHI		118 min
Jul 31, 10:00 PM EDT	Special Weather Statement	PHI	Chester	60 min
Aug 1, 3:14 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	51 min
Aug 1, 4:00 PM EDT	Severe Thunderstorm Warning	PHI	Berks	75 min
Aug 1, 4:33 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware, Montgomery, Philadelphia	87 min
Aug 1, 4:39 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh	42 min
Aug 1, 5:11 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware, Montgomery, Philadelphia	2 hr
Aug 1, 5:37 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Philadelphia	53 min
Aug 1, 4:07 PM EDT	Special Weather Statement	PHI	Cecil	53 min
Aug 1, 4:46 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	48 min
Aug 1, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent, Queen Anne's	78 min
Aug 1, 6:12 PM EDT	Areal Flood Advisory	PHI	Kent, Queen Anne's	2 hr
Aug 1, 6:41 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	18 min
Aug 1, 7:31 PM EDT	Special Weather Statement	PHI	Caroline, Cecil, Kent, Queen Anne's	119 min
Aug 1, 7:46 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	38 min
Aug 1, 3:15 PM EDT	Special Weather Statement	PHI	Sussex	45 min
Aug 1, 3:38 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	37 min
Aug 1, 3:59 PM EDT	Flash Flood Warning	PHI	Sussex	4 hr

Nearby

Special Weather Statements in Pennsylvania, 2011 Every special weather statement in 2011

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.