Alert archive / Pennsylvania / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

April 5, 2011Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 5, 2011, 4:03 AM EDT for Berks County, Pennsylvania. It was in force for 57 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
Apr 5, 2011, 4:03 AM EDT (08:03 UTC)
Expired
Apr 5, 2011, 5:00 AM EDT
In force
57 min
Issued by
NWS Philadelphia/Mount Holly

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 155 km from the middle of the area, began a volume at 08:06 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 8.1 hours before the alert went out and 208 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-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2011-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2011-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 284 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
4112 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
284 m²/s²
0-3 km storm-relative helicity
328 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.

032 
WWUS81 KPHI 050803
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
403 AM EDT TUE APR 5 2011

PAZ060-050900-
BERKS PA-
403 AM EDT TUE APR 5 2011

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT BERKS COUNTY...

AT 400 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS WITH STRONG WIND GUSTS ALONG A LINE EXTENDING FROM 27 MILES 
WEST OF LANCASTER TO 38 MILES SOUTHWEST OF BALTIMORE...MOVING 
NORTHEAST AT 45 MPH. THE SHOWERS WILL BE NEAR STRAUSSTOWN AROUND 445 
AM...WOMELSDORF AROUND 450 AM...BERNVILLE AROUND 455 AM... 
CENTERPORT...HAMBURG...WERNERSVILLE AND PORT CLINTON AROUND 500 AM.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE SHOWERS.

LAT...LON 4053 7625 4054 7618 4060 7605 4059 7603
      4064 7600 4068 7590 4067 7587 4066 7586
      4062 7586 4035 7594 4023 7604 4036 7621
      4036 7624 4044 7637

$$

HAYES

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 5, 5:01 AM EDTSevere Thunderstorm WarningPHISalem74 min
Apr 5, 5:58 AM EDTSpecial Weather StatementPHIHunterdon, Morris, Somerset, Sussex, Warren62 min
Apr 5, 6:05 AM EDTSpecial Weather StatementPHIAtlantic, Burlington, Camden, Gloucester, Monmouth, Ocean and 1 more55 min
Apr 5, 6:30 AM EDTSpecial Weather StatementPHIHunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset and 1 more60 min
Apr 5, 6:42 AM EDTSpecial Weather StatementPHICape May, Cumberland63 min
Apr 5, 7:05 AM EDTSpecial Weather StatementPHIMorris55 min
Apr 5, 7:07 AM EDTSpecial Weather StatementPHIBurlington, Middlesex, Monmouth, Ocean53 min
Apr 5, 8:55 AM EDTSpecial Weather StatementPHIHunterdon, Morris, Warren65 min
Apr 5, 9:37 AM EDTSpecial Weather StatementPHIHunterdon, Morris, Salem, Somerset, Sussex, Warren53 min
Apr 5, 10:16 AM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Salem44 min
Apr 5, 10:20 AM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland40 min
Apr 5, 10:30 AM EDTSpecial Weather StatementPHIMercer, Middlesex, Monmouth, Morris, Somerset60 min
Apr 5, 10:35 AM EDTSpecial Marine WarningPHI55 min
Apr 5, 10:41 AM EDTSevere Thunderstorm WarningPHIAtlantic, Cumberland, Salem19 min
Apr 5, 10:58 AM EDTSpecial Weather StatementPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Middlesex and 2 more92 min
Apr 5, 11:00 AM EDTSevere Thunderstorm WarningPHIBurlington, Monmouth, Ocean30 min
Apr 5, 11:09 AM EDTSpecial Marine WarningPHI96 min
Apr 5, 11:45 AM EDTSpecial Marine WarningPHI60 min
Apr 5, 2:57 PM EDTSmall Craft AdvisoryPHI27 hr
Apr 5, 5:23 AM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Chester, Delaware, Lehigh, Montgomery and 1 more67 min
Apr 5, 5:28 AM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot62 min
Apr 5, 3:05 PM EDTFrost AdvisoryPHICaroline, Queen Anne's, Talbot13 hr

Nearby

Special Weather Statements in Pennsylvania, 2011Every 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.