Alert archive / Pennsylvania / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

May 15, 2011Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at May 15, 2011, 4:14 PM EDT for Lehigh County, Pennsylvania. It was in force for 61 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: May 15, 2011, 4:14 PM EDT (20:14 UTC)
Expired: May 15, 2011, 5:15 PM EDT
In force: 61 min
Issued by: NWS Philadelphia/Mount Holly

County Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 134 km from the middle of the area, began a volume at 20:17 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
May 15, 4:40 PM EDT	HAIL 0.88	Fogelsville, PA

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.2 hours before the alert went out and 237 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: 55 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 545 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 50 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.

749 
WWUS81 KPHI 152014
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
414 PM EDT SUN MAY 15 2011

PAZ054-055-060>062-152115-
BERKS PA-CARBON PA-LEHIGH PA-MONROE PA-NORTHAMPTON PA-
414 PM EDT SUN MAY 15 2011

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

AT 409 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 14 MILES NORTHEAST OF READING...MOVING NORTHEAST
AT 20 MPH. THE THUNDERSTORM WILL BE NEAR CLAUSSVILLE AROUND 445 PM...
EMERALD...SLATINGTON AROUND 500 PM...PALMERTON AND BELTZVILLE STATE
PARK AROUND 515 PM.

VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.
WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM...AS WELL AS SMALL 
HAIL.

LAT...LON 4061 7581 4071 7568 4088 7561 4082 7537
      4040 7575 4047 7591

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 11:46 PM EDT	Special Weather Statement	PHI	Cape May, Cumberland, Gloucester, Salem	89 min
May 15, 12:52 AM EDT	Special Weather Statement	PHI	Camden, Cumberland, Gloucester, Hunterdon, Mercer, Somerset and 1 more	83 min
May 15, 1:19 AM EDT	Special Weather Statement	PHI	Atlantic, Cape May	86 min
May 15, 2:23 AM EDT	Special Weather Statement	PHI	Atlantic, Monmouth, Ocean	2 hr
May 15, 2:33 PM EDT	Special Weather Statement	PHI	Cumberland	57 min
May 15, 3:23 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex	67 min
May 15, 3:37 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Somerset	53 min
May 15, 3:57 PM EDT	Special Weather Statement	PHI	Cumberland	63 min
May 15, 4:39 PM EDT	Special Weather Statement	PHI	Middlesex, Somerset	66 min
May 15, 5:21 PM EDT	Special Weather Statement	PHI	Morris	54 min
May 15, 5:23 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex	67 min
May 15, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	59 min
May 15, 6:41 PM EDT	Special Weather Statement	PHI	Sussex, Warren	64 min
May 15, 6:49 PM EDT	Special Weather Statement	PHI	Morris, Somerset	56 min
May 15, 7:41 PM EDT	Special Weather Statement	PHI	Sussex	64 min
May 15, 2:26 PM EDT	Special Weather Statement	PHI	Berks	64 min
May 15, 2:46 PM EDT	Special Weather Statement	PHI	Schuylkill	59 min
May 15, 2:55 PM EDT	Special Weather Statement	PHI	Delaware	65 min
May 15, 3:30 PM EDT	Special Weather Statement	PHI	Berks	60 min
May 15, 3:39 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	44 min
May 15, 4:19 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	56 min
May 15, 4:31 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	59 min
May 15, 4:35 PM EDT	Special Weather Statement	PHI	Lehigh	55 min
May 15, 4:52 PM EDT	Special Weather Statement	PHI	Northampton	68 min
May 15, 5:03 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Monroe, Northampton	57 min
May 15, 5:33 PM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh	57 min
May 15, 5:37 PM EDT	Special Weather Statement	PHI	Bucks	53 min
May 15, 6:39 PM EDT	Special Weather Statement	PHI	Berks	66 min
May 15, 7:20 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh	3 hr
May 15, 7:28 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery, Philadelphia	62 min
May 15, 7:37 PM EDT	Special Weather Statement	PHI	Berks	53 min
May 14, 8:58 PM EDT	Special Weather Statement	PHI	Caroline, Queen Anne's, Talbot	92 min
May 14, 9:46 PM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's, Talbot	89 min
May 14, 10:43 PM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's	92 min
May 15, 7:47 PM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's, Talbot	58 min
May 15, 12:04 AM EDT	Special Weather Statement	PHI	Sussex	56 min
May 15, 4:47 PM EDT	Special Weather Statement	PHI	Sussex	58 min
May 15, 6:40 PM EDT	Special Weather Statement	PHI	New Castle	65 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.