Alert archive / Pennsylvania / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

October 14, 2011Berks County, Carbon County, Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 14, 2011, 11:38 AM EDT for Berks County, Carbon County, Lehigh County, Pennsylvania. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 14, 2011, 11:38 AM EDT (15:38 UTC)
Expired: Oct 14, 2011, 12:30 PM EDT
In force: 52 min
Issued by: NWS Philadelphia/Mount Holly

Counties Berks County, PA, Carbon County, PA, Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 135 km from the middle of the area, began a volume at 15:40 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.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 3.6 hours before the alert went out and 142 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: 262 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 748 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 63 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.

977 
WWUS81 KPHI 141538
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1138 AM EDT FRI OCT 14 2011

PAZ054-060-061-141630-
BERKS PA-CARBON PA-LEHIGH PA-
1138 AM EDT FRI OCT 14 2011

...A STRONG THUNDERSTORM WILL AFFECT BERKS...CARBON AND LEHIGH
COUNTIES...

AT 1131 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES SOUTHEAST OF READING...MOVING NORTH AT 35
MPH. THE THUNDERSTORM WILL BE NEAR FLEETWOOD...LAURELDALE AROUND 1145
AM...LYONS...TOPTON AROUND NOON...SCHNECKSVILLE...NEFFS AROUND 1215 
PM...SLATINGTON AND EMERALD AROUND 1230 PM. ANOTHER AREA OF 
THUNDERSTORMS WAS MOVING INTO WESTERN CARBON COUNTY AT 1131 PM AND 
WILL BE EFFECTING OTHER AREAS OF CARBON COUNTY THROUGH THE NOON HOUR.

THESE THUNDERSTORMS WILL PRODUCE WIND GUSTS UP TO 50 MPH...SMALL 
HAIL...AND CLOUD TO GROUND LIGHTNING. 

LAT...LON 4098 7551 4094 7557 4082 7548 4079 7562
      4075 7562 4073 7553 4065 7549 4067 7544
      4054 7536 4042 7550 4043 7554 4021 7576
      4014 7590 4018 7596 4057 7610 4074 7578
      4091 7600 4100 7575 4109 7578 4114 7568

$$

FORECASTER:JJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 14, 12:15 AM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more	13 hr
Oct 14, 3:26 AM EDT	Coastal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	19 hr
Oct 14, 4:01 AM EDT	Gale Watch	PHI		12 hr
Oct 14, 2:21 PM EDT	Special Weather Statement	PHI	Warren	54 min
Oct 14, 2:53 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Hunterdon, Mercer, Somerset	67 min
Oct 14, 3:12 PM EDT	Special Weather Statement	PHI	Sussex, Warren	63 min
Oct 14, 3:59 PM EDT	Gale Watch	PHI		12 hr
Oct 14, 3:59 PM EDT	Gale Warning	PHI		27 hr
Oct 14, 3:59 PM EDT	Special Weather Statement	PHI	Middlesex, Monmouth, Morris	61 min
Oct 14, 10:45 AM EDT	Special Weather Statement	PHI	Berks, Lehigh	60 min
Oct 14, 12:25 PM EDT	Special Weather Statement	PHI	Chester, Delaware, Montgomery	80 min
Oct 14, 12:51 PM EDT	Special Weather Statement	PHI	Lehigh	54 min
Oct 14, 1:22 PM EDT	Special Weather Statement	PHI	Carbon, Monroe, Northampton	53 min
Oct 14, 1:43 PM EDT	Special Weather Statement	PHI	Bucks, Delaware, Montgomery, Philadelphia	62 min
Oct 14, 11:21 AM EDT	Special Weather Statement	PHI	Cecil	54 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.