Alert archive / Pennsylvania / Special Weather Statements in 2019

Special Weather Statement, NWS Philadelphia/Mount Holly

August 6, 2019Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 6, 2019, 11:46 AM EDT for Philadelphia County, Pennsylvania. It was in force for 29 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: Aug 6, 2019, 11:46 AM EDT (15:46 UTC)
Expired: Aug 6, 2019, 12:15 PM EDT
In force: 29 min
Issued by: NWS Philadelphia/Mount Holly

County Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 61 km from the middle of the area, began a volume at 15:45 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
Aug 6, 12:18 PM EDT	HAIL 0.25	Narberth, PA

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 3.8 hours before the alert went out and 216 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: 57 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1078 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

117 
WWUS81 KPHI 061546
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
1146 AM EDT Tue Aug 6 2019

NJZ018-PAZ070-071-104-061615-
Camden-Eastern Montgomery-Delaware-Philadelphia-
1146 AM EDT Tue Aug 6 2019

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN CAMDEN...
SOUTHEASTERN MONTGOMERY...SOUTHERN PHILADELPHIA AND EAST CENTRAL
DELAWARE COUNTIES...

At 1146 AM EDT, a strong thunderstorm was located over Roxborough, or
near Philadelphia, moving southeast at 10 mph.

Wind gusts up to 40 mph and penny size hail are possible with this
storm.

Locations impacted include...
Philadelphia, Camden, Gloucester City, Bellmawr, Yeadon, Palmyra,
Westville, Narberth, East Lansdowne, Brooklawn, Wissinoming, Morris
Park, Germantown, Center City, South Philadelphia, Tacony, Ben
Franklin Bridge, Kensington, Roxborough and Drexel Hill.

If outdoors, consider seeking shelter inside a building.

LAT...LON 4000 7505 3999 7506 3999 7505 3987 7512
      3989 7514 3988 7516 3996 7532 4005 7528
      4003 7503
TIME...MOT...LOC 1546Z 294DEG 9KT 3998 7522 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 9:04 AM EDT	Areal Flood Advisory	PHI	Atlantic	74 min
Aug 6, 12:05 PM EDT	Special Weather Statement	PHI	Cumberland	40 min
Aug 6, 12:51 PM EDT	Areal Flood Advisory	PHI	Cumberland	108 min
Aug 6, 1:09 PM EDT	Special Weather Statement	PHI	Gloucester	36 min
Aug 6, 1:13 PM EDT	Special Weather Statement	PHI	Monmouth	32 min
Aug 6, 1:14 PM EDT	Special Weather Statement	PHI	Ocean	31 min
Aug 6, 1:30 PM EDT	Special Weather Statement	PHI	Gloucester	30 min
Aug 6, 1:34 PM EDT	Special Weather Statement	PHI	Atlantic	41 min
Aug 6, 1:38 PM EDT	Special Weather Statement	PHI	Monmouth	37 min
Aug 6, 1:50 PM EDT	Special Weather Statement	PHI	Ocean	40 min
Aug 6, 2:14 PM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May, Cumberland	3 hr
Aug 6, 2:19 PM EDT	Special Weather Statement	PHI	Atlantic	41 min
Aug 6, 2:33 PM EDT	Special Weather Statement	PHI	Ocean	27 min
Aug 6, 3:07 PM EDT	Special Weather Statement	PHI	Burlington	23 min
Aug 6, 3:30 PM EDT	Small Craft Advisory	PHI		36 hr
Aug 6, 3:55 PM EDT	Special Weather Statement	PHI	Middlesex, Somerset	50 min
Aug 6, 7:10 PM EDT	Special Weather Statement	PHI	Warren	35 min
Aug 6, 7:32 PM EDT	Severe Thunderstorm Warning	PHI	Warren	43 min
Aug 6, 12:13 PM EDT	Special Weather Statement	PHI	Philadelphia	47 min
Aug 6, 12:21 PM EDT	Areal Flood Advisory	PHI	Montgomery, Philadelphia	102 min
Aug 6, 12:36 PM EDT	Severe Thunderstorm Warning	PHI	Montgomery, Philadelphia	39 min
Aug 6, 1:18 PM EDT	Special Weather Statement	PHI	Bucks	27 min
Aug 6, 2:35 PM EDT	Special Weather Statement	PHI	Monroe	25 min
Aug 6, 3:05 PM EDT	Special Weather Statement	PHI	Monroe	25 min
Aug 6, 4:40 PM EDT	Special Weather Statement	PHI	Carbon	35 min
Aug 6, 5:51 PM EDT	Special Weather Statement	PHI	Monroe	39 min
Aug 6, 6:32 PM EDT	Special Weather Statement	PHI	Monroe	28 min
Aug 6, 6:38 PM EDT	Special Weather Statement	PHI	Carbon	37 min
Aug 6, 6:57 PM EDT	Flash Flood Warning	PHI	Monroe	104 min
Aug 6, 1:54 PM EDT	Special Weather Statement	PHI	Sussex	36 min
Aug 6, 2:26 PM EDT	Areal Flood Advisory	PHI	Sussex	3 hr
Aug 6, 3:04 PM EDT	Special Weather Statement	PHI	Sussex	26 min

Nearby

Special Weather Statements in Pennsylvania, 2019 Every special weather statement in 2019

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.