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, 9:02 PM EDT for Berks County, Bucks County, Montgomery County, Pennsylvania. It was in force for 58 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, 9:02 PM EDT (01:02 UTC)
- Expired
- Aug 3, 2011, 10:00 PM EDT
- In force
- 58 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Berks County, PA, Bucks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 103 km from the middle of the area, began a volume at 01:06 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, 1.0 hours before the alert went out and 227 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.
098
WWUS81 KPHI 040102
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
902 PM EDT WED AUG 3 2011
NJZ009-015-PAZ060>062-067>071-040200-
BERKS PA-BUCKS PA-CHESTER PA-DELAWARE PA-HUNTERDON NJ-LEHIGH PA-
MERCER NJ-MONTGOMERY PA-NORTHAMPTON PA-PHILADELPHIA PA-
902 PM EDT WED AUG 3 2011
...THUNDERSTORMS WILL AFFECT BERKS...BUCKS...CHESTER...DELAWARE...
HUNTERDON ...LEHIGH...MERCER...MONTGOMERY...NORTHAMPTON AND
PHILADELPHIA COUNTIES...
AT 854 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
EMBEDDED THUNDERSTORMS WITHIN A LINE OF HEAVIER SHOWERS EXTENDING
FROM 6 MILES EAST OF ALLENTOWN TO 7 MILES SOUTHWEST OF ALLENTOWN TO
16 MILES NORTHWEST OF READING...MOVING SOUTHEAST AT 30 MPH. THE
THUNDERSTORMS WILL BE NEAR REVERE...FERNDALE AROUND 915
PM...PIPERSVILLE...OTTSVILLE AROUND 930 PM...LUMBERVILLE...NEW HOPE
AROUND 945 PM...AMBLER AND WARMINSTER HEIGHTS AROUND 1000 PM.
A PERIOD OF HEAVY RAINFALL WILL OCCUR THAT COULD PRODUCE ONE HALF
INCH TO 1 INCH OF RAIN WITHIN AN HOURS TIME. BE ALERT FOR THE
POSSIBILITY OF LOCALIZED FLOODING.
LAT...LON 4055 7561 4069 7532 4020 7475 4007 7504
4001 7576 4049 7633
$$
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, 9:53 PM EDT | Special Weather Statement | PHI | Mercer | 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 |
Nearby
Special Weather Statements in Pennsylvania, 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.