Alert archive / Pennsylvania / Special Weather Statements in 2016

Special Weather Statement, NWS Philadelphia/Mount Holly

July 23, 2016Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 23, 2016, 4:10 PM EDT for Philadelphia County, Pennsylvania. It was in force for 50 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 23, 2016, 4:10 PM EDT (20:10 UTC)
Expired: Jul 23, 2016, 5:00 PM EDT
In force: 50 min
Issued by: NWS Philadelphia/Mount Holly

County Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 49 km from the middle of the area, began a volume at 20:13 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 12:00Z, 8.2 hours before the alert went out and 201 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1872 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

272 
WWUS81 KPHI 232010
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
410 PM EDT SAT JUL 23 2016
 
NJZ018-019-PAZ071-104-232100-
CAMDEN-NORTHWESTERN BURLINGTON-PHILADELPHIA-EASTERN MONTGOMERY-
410 PM EDT SAT JUL 23 2016

...A STRENGTHENING THUNDERSTORM WILL AFFECT NORTHWESTERN CAMDEN...
NORTHWESTERN BURLINGTON...SOUTHEASTERN MONTGOMERY AND PHILADELPHIA
COUNTIES...

AT 408 PM EDT...A STRONG THUNDERSTORM WAS OVER CHESTNUT HILL...OR
NEAR PHILADELPHIA...MOVING EAST AT 30 MPH.

LOCAL AND BRIEF WIND GUSTS UP TO 40 MPH AND PEA SIZE HAIL ARE
POSSIBLE WITH THIS STORM.

BRIEF HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY
CAUSE LOCALIZED FLOODING. 

FREQUENT 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.

LOCATIONS IMPACTED INCLUDE...
PHILADELPHIA...CAMDEN...CHERRY HILL...EVESHAM...MOUNT LAUREL...
NORRISTOWN...WILLINGBORO...EAST NORRITON...BURLINGTON...RIVERSIDE...
CONSHOHOCKEN...PALMYRA...AMBLER...JENKINTOWN...BEVERLY...ROCKLEDGE...
ABINGTON...BRYN ATHYN...ERLTON-ELLISBURG AND GOLDEN TRIANGLE.


LAT...LON 3983 7489 4007 7535 4017 7529 4011 7496
      4008 7496 4006 7498 4005 7497 4007 7494
      4008 7487 4009 7486 4007 7475
TIME...MOT...LOC 2008Z 291DEG 27KT 4009 7521 
$$

GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 4:12 PM EDT	Heat Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Hunterdon, Middlesex and 7 more	50 hr
Jul 23, 4:55 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	35 min
Jul 23, 5:03 PM EDT	Severe Thunderstorm Warning	PHI	Salem	28 min
Jul 23, 5:10 PM EDT	Special Marine Warning	PHI		65 min
Jul 23, 5:24 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	51 min
Jul 23, 5:43 PM EDT	Special Weather Statement	PHI	Ocean	62 min
Jul 23, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Ocean	65 min
Jul 23, 6:05 PM EDT	Special Marine Warning	PHI		85 min
Jul 23, 7:11 PM EDT	Special Weather Statement	PHI	Atlantic	34 min
Jul 23, 7:18 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	27 min
Jul 23, 7:23 PM EDT	Special Marine Warning	PHI		82 min
Jul 23, 3:58 PM EDT	Special Weather Statement	PHI	Chester	47 min
Jul 23, 4:28 PM EDT	Severe Thunderstorm Warning	PHI	Chester	47 min
Jul 23, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent	65 min
Jul 23, 6:46 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's	44 min
Jul 23, 7:31 PM EDT	Special Weather Statement	PHI	Kent	29 min

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.