Alert archive / Pennsylvania / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

June 22, 2011Berks County, Chester County, Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 22, 2011, 2:15 AM EDT for Berks County, Chester County, Delaware County, Pennsylvania. It was in force for 60 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: Jun 22, 2011, 2:15 AM EDT (06:15 UTC)
Expired: Jun 22, 2011, 3:15 AM EDT
In force: 60 min
Issued by: NWS Philadelphia/Mount Holly

Counties Berks County, PA, Chester County, PA, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 133 km from the middle of the area, began a volume at 06:18 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, 6.3 hours before the alert went out and 181 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: 3316 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 856 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 161 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.6

Open this sounding in Storm Lab

The text

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

022 
WWUS81 KPHI 220615
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
215 AM EDT WED JUN 22 2011

DEZ001-MDZ008-PAZ060-067-068-070-220715-
BERKS PA-CECIL MD-CHESTER PA-DELAWARE PA-MONTGOMERY PA-NEW CASTLE DE-
215 AM EDT WED JUN 22 2011

...STRONG THUNDERSTORMS WILL AFFECT BERKS...CECIL...CHESTER...
DELAWARE...MONTGOMERY AND NEW CASTLE COUNTIES...

AT 214 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 17 MILES NORTH OF
LANCASTER TO 15 MILES EAST OF LANCASTER TO NEWARK...MOVING EAST AT 20
MPH. THE THUNDERSTORMS WILL BE NEAR WOMELSDORF...NORTH STAR AROUND
230 AM...ASHLAND...WERNERSVILLE AROUND 245 AM...BERNVILLE...WESTTOWN
AROUND 300 AM...LIONVILLE AND BOOTHWYN AROUND 315 AM.

VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.

LAT...LON 4054 7588 3988 7530 3964 7578 3987 7601
      3992 7601 3999 7599 4003 7595 4011 7595
      4014 7590 4036 7621 4036 7624 4040 7628

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 3:31 AM EDT	Special Marine Warning	PHI		59 min
Jun 22, 8:39 AM EDT	Special Weather Statement	PHI	Morris, Sussex	36 min
Jun 22, 9:31 AM EDT	Special Weather Statement	PHI	Morris, Sussex	44 min
Jun 22, 3:07 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	53 min
Jun 22, 3:59 PM EDT	Special Weather Statement	PHI	Mercer	61 min
Jun 22, 3:59 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	61 min
Jun 22, 4:06 PM EDT	Special Marine Warning	PHI		84 min
Jun 22, 4:09 PM EDT	Special Weather Statement	PHI	Sussex	66 min
Jun 22, 4:17 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	58 min
Jun 22, 4:37 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	53 min
Jun 22, 4:39 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean, Somerset	66 min
Jun 22, 4:53 PM EDT	Tornado Warning	PHI	Sussex, Warren	37 min
Jun 22, 5:11 PM EDT	Tornado Warning	PHI	Hunterdon, Morris, Sussex, Warren	34 min
Jun 22, 5:31 PM EDT	Tornado Warning	PHI	Monmouth, Ocean	29 min
Jun 22, 5:43 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Somerset	48 min
Jun 21, 9:37 PM EDT	Areal Flood Advisory	PHI	Monroe	116 min
Jun 22, 2:57 AM EDT	Special Weather Statement	PHI	Delaware	63 min
Jun 22, 3:05 AM EDT	Areal Flood Advisory	PHI	Chester, Delaware	115 min
Jun 22, 4:13 AM EDT	Special Weather Statement	PHI	Carbon	92 min
Jun 22, 6:32 AM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	58 min
Jun 22, 8:00 AM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	60 min
Jun 22, 1:48 PM EDT	Special Weather Statement	PHI	Berks	57 min
Jun 22, 2:53 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	67 min
Jun 21, 11:57 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	63 min
Jun 22, 12:40 AM EDT	Special Weather Statement	PHI	Caroline	65 min
Jun 22, 12:55 AM EDT	Special Weather Statement	PHI	Cecil	65 min
Jun 22, 1:05 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	55 min
Jun 22, 1:29 AM EDT	Special Weather Statement	PHI	Cecil	61 min
Jun 22, 1:47 AM EDT	Areal Flood Advisory	PHI	Caroline, Talbot	105 min
Jun 22, 2:02 AM EDT	Special Weather Statement	PHI	Caroline	58 min
Jun 22, 1:43 AM EDT	Special Weather Statement	PHI	Kent	62 min
Jun 22, 2:31 AM EDT	Areal Flood Advisory	PHI	Sussex	119 min
Jun 22, 12:18 PM EDT	Special Weather Statement	PHI	Sussex	57 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.