Alert archive / Pennsylvania / Special Weather Statements in 2011
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Aug 3, 2011, 9:53 PM EDT for Mercer County, New Jersey; 5 counties in Pennsylvania. It was in force for 52 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
- Aug 3, 2011, 9:53 PM EDT (01:53 UTC)
- Expired
- Aug 3, 2011, 10:45 PM EDT
- In force
- 52 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Mercer County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 111 km from the middle of the area, began a volume at 01:52 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, 1.9 hours before the alert went out and 205 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.
- Mixed-layer CAPE
- 127 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 866 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
714
WWUS81 KPHI 040153
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
953 PM EDT WED AUG 3 2011
NJZ009-013-015-018>020-PAZ060-061-067>071-040245-
BERKS PA-BUCKS PA-CAMDEN NJ-CHESTER PA-DELAWARE PA-HUNTERDON
NJ-LEHIGH PA-MERCER NJ-MONTGOMERY PA-NORTHWESTERN BURLINGTON
NJ-OCEAN NJ-PHILADELPHIA PA-WESTERN MONMOUTH NJ-
953 PM EDT WED AUG 3 2011
...SCATTERED THUNDERSTORMS WILL AFFECT BERKS...BUCKS...BURLINGTON...
CAMDEN...CHESTER...DELAWARE...HUNTERDON...LEHIGH...MERCER...
MONMOUTH...MONTGOMERY...OCEAN AND PHILADELPHIA COUNTIES...
AT 946 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SCATTERED THUNDERSTORMS EMBEDDED WITHIN A BAND OF HEAVY SHOWERS
EXTENDING FROM 12 MILES SOUTHEAST OF EASTON TO 15 MILES SOUTHWEST OF
ALLENTOWN TO 10 MILES WEST OF READING...MOVING SOUTHEAST AT 25 MPH.
THE THUNDERSTORMS WILL BE NEAR PIPERSVILLE...OTTSVILLE AROUND 1000
PM...NEW MORGAN...LUMBERVILLE AROUND 1015 PM...PENNINGTON...PUGHTOWN
AROUND 1030 PM...ORELAND AND FLOURTOWN AROUND 1045 PM.
HEAVY RAINFALL WILL OCCUR WITH A COUPLE OF THESE STORMS POSSIBLY
PRODUCING ONE HALF TO 1 INCH OF RAIN IN AN HOURS TIME. BE ALERT FOR
THE POSSIBILITY OF LOCALIZED FLOODING.
THERE MAY BE A FEW LIGHTNING STRIKES.
LAT...LON 4053 7510 4012 7444 3994 7523 3988 7586
4002 7597 4011 7595 4014 7590 4036 7621
4037 7626 4041 7629
$$
FORECASTER: DRAGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 8:53 PM EDT | Special Weather Statement | PHI | Sussex | 52 min |
| Aug 3, 10:33 PM EDT | Special Weather Statement | PHI | Atlantic, Burlington, Camden, Gloucester, Hunterdon, Mercer and 3 more | 117 min |
| Aug 4, 12:18 AM EDT | Special Weather Statement | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Ocean and 1 more | 117 min |
| Aug 4, 3:55 AM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more | 11 hr |
| Aug 3, 8:11 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh, Northampton | 64 min |
| Aug 3, 9:02 PM EDT | Special Weather Statement | PHI | Berks, Bucks, Montgomery | 58 min |
Nearby
Special Weather Statements in Pennsylvania, 2011Special Weather Statements in New Jersey, 2011Every 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.