Alert archive / Pennsylvania / Special Weather Statements in 2016

Special Weather Statement, NWS Philadelphia/Mount Holly

July 31, 2016Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 31, 2016, 11:38 PM EDT for Lehigh County, Pennsylvania. It was in force for 37 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: Jul 31, 2016, 11:38 PM EDT (03:38 UTC)
Expired: Aug 1, 2016, 12:15 AM EDT
In force: 37 min
Issued by: NWS Philadelphia/Mount Holly

County Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 133 km from the middle of the area, began a volume at 03:39 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

Brookhaven, NY (KOKX), launched 00:00Z, 3.6 hours before the alert went out and 238 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: 51 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 553 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

032 
WWUS81 KPHI 010338
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1138 PM EDT SUN JUL 31 2016
 
PAZ060-061-010415-
BERKS-LEHIGH-
1138 PM EDT SUN JUL 31 2016

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

AT 1137 PM EDT...A STRONG THUNDERSTORM WAS NEAR WANAMAKERS...OR 15
MILES SOUTHEAST OF TAMAQUA...MOVING EAST AT 20 MPH.

WIND GUSTS UP TO 30 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
ALLENTOWN...EMMAUS...NORTHAMPTON...KUTZTOWN...WALNUTPORT...TOPTON...
LENHARTSVILLE...NEW TRIPOLI...JORDAN VALLEY...ZIONSVILLE...
CLAUSSVILLE...SCHNECKSVILLE...NEFFS...WANAMAKERS...ANCIENT OAKS...
COFFEETOWN...CATASAUQUA...COPLAY...MACUNGIE AND NORTH CATASAUQUA.

HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 4067 7592 4070 7583 4073 7578 4074 7559
      4072 7555 4074 7553 4066 7548 4067 7545
      4047 7544 4050 7594
TIME...MOT...LOC 0337Z 269DEG 17KT 4061 7581 
$$

GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 8:02 PM EDT	Areal Flood Warning	PHI	Somerset	4 hr
Jul 31, 8:10 PM EDT	Areal Flood Advisory	PHI	Morris	4 hr
Aug 1, 7:26 AM EDT	Special Weather Statement	PHI	Ocean	49 min
Aug 1, 3:18 PM EDT	Special Weather Statement	PHI	Salem	87 min
Aug 1, 3:56 PM EDT	Special Marine Warning	PHI		64 min
Aug 1, 3:56 PM EDT	Special Marine Warning	PHI		64 min
Aug 1, 5:33 PM EDT	Areal Flood Advisory	PHI	Cumberland	4 hr
Aug 1, 5:39 PM EDT	Special Marine Warning	PHI		66 min
Aug 1, 5:51 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	35 min
Jul 31, 10:33 PM EDT	Special Weather Statement	PHI	Berks	57 min
Aug 1, 4:23 PM EDT	Special Weather Statement	PHI	Monroe	52 min
Aug 1, 5:39 PM EDT	Special Weather Statement	PHI	Carbon	66 min
Aug 1, 6:14 PM EDT	Special Weather Statement	PHI	Carbon	46 min
Aug 1, 6:53 PM EDT	Special Weather Statement	PHI	Lehigh	22 min
Aug 1, 1:41 PM EDT	Special Weather Statement	PHI	Cecil	94 min
Aug 1, 5:43 PM EDT	Severe Thunderstorm Warning	PHI	Queen Anne's, Talbot	62 min
Aug 1, 6:25 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	53 min
Aug 1, 2:56 PM EDT	Areal Flood Advisory	PHI	Sussex	4 hr
Aug 1, 3:36 PM EDT	Special Weather Statement	PHI	Sussex	84 min
Aug 1, 6:20 PM EDT	Areal Flood Advisory	PHI	Sussex	4 hr

Nearby

Special Weather Statements in Pennsylvania, 2016 Every special weather statement in 2016

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.