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 7, 2011, 3:07 PM EDT for Philadelphia County, Pennsylvania. It was in force for 23 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 7, 2011, 3:07 PM EDT (19:07 UTC)
- Expired
- Aug 7, 2011, 3:30 PM EDT
- In force
- 23 min
- Issued by
- NWS Philadelphia/Mount Holly
County Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 39 km from the middle of the area, began a volume at 19:07 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, 7.1 hours before the alert went out and 184 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
- 496 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 484 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 194 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
737 WWUS81 KPHI 071907 SPSPHI SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 307 PM EDT SUN AUG 7 2011 NJZ013-015-018>020-027-PAZ068-069-071-071930- BUCKS PA-CAMDEN NJ-MERCER NJ-MONTGOMERY PA-NORTHWESTERN BURLINGTON NJ-OCEAN NJ-PHILADELPHIA PA-SOUTHEASTERN BURLINGTON NJ-WESTERN MONMOUTH NJ- 307 PM EDT SUN AUG 7 2011 ...A THUNDERSTORM WILL AFFECT BUCKS...BURLINGTON...CAMDEN... MERCER...MONMOUTH...MONTGOMERY...OCEAN AND PHILADELPHIA COUNTIES... AT 303 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM 7 MILES EAST OF PHILADELPHIA...MOVING EAST AT 30 TO 35 MPH. THE THUNDERSTORM WILL BE NEAR RIVERSIDE...DELANCO...EDGEWATER PARK...BEVERLY AROUND 310 PM...WILLINGBORO...EDGEWATER PARK...CROYDON...HULMEVILLE AROUND 315 PM...LUMBERTON AND BURLINGTON AROUND 320 PM. VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND POSSIBLY FILL ROADSIDE DITCHES AND SMALL STREAMS. OTHER THUNDERSTORMS SHOULD BE DEVELOPING SHORTLY TO THE EAST AND NORTH OF PHILADELPHIA AND HEADING INTO WEST CENTRAL NEW JERSEY. STORMS MAY BE ACCOMPANIED BY A LIGHTNING STRIKE AND GUSTY WEST WIND TO 30 MPH. LAT...LON 4027 7458 3991 7453 3995 7509 4021 7523 $$ FORECASTER: DRAG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 8:49 PM EDT | Flood Watch | PHI | Morris, Sussex, Warren | 9 hr |
| Aug 6, 10:33 PM EDT | Areal Flood Advisory | PHI | Warren | 6 hr |
| Aug 7, 12:42 AM EDT | Special Weather Statement | PHI | Morris | 63 min |
| Aug 7, 1:32 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Warren | 3 hr |
| Aug 7, 1:54 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Sussex, Warren | 3 hr |
| Aug 7, 3:56 AM EDT | Special Weather Statement | PHI | Hunterdon | 64 min |
| Aug 7, 4:45 AM EDT | Special Weather Statement | PHI | Hunterdon, Somerset | 60 min |
| Aug 7, 5:10 AM EDT | Areal Flood Advisory | PHI | Morris, Somerset | 81 min |
| Aug 7, 5:30 AM EDT | Special Weather Statement | PHI | Mercer, Middlesex | 60 min |
| Aug 7, 6:03 AM EDT | Flash Flood Watch | PHI | Sussex, Warren | 14 hr |
| Aug 7, 3:25 PM EDT | Special Weather Statement | PHI | Mercer | 35 min |
| Aug 7, 3:34 PM EDT | Special Weather Statement | PHI | Warren | 26 min |
| Aug 7, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Monmouth, Ocean | 27 min |
| Aug 7, 4:19 PM EDT | Special Weather Statement | PHI | Monmouth | 41 min |
| Aug 7, 5:02 PM EDT | Special Weather Statement | PHI | Sussex | 28 min |
| Aug 7, 6:49 PM EDT | Special Weather Statement | PHI | Sussex | 41 min |
| Aug 7, 7:11 PM EDT | Special Weather Statement | PHI | Sussex | 49 min |
| Aug 7, 7:35 PM EDT | Special Weather Statement | PHI | Sussex | 25 min |
| Aug 6, 10:06 PM EDT | Special Weather Statement | PHI | Berks | 84 min |
| Aug 6, 10:14 PM EDT | Special Weather Statement | PHI | Pike | 61 min |
| Aug 7, 12:48 AM EDT | Special Weather Statement | PHI | Montgomery | 57 min |
| Aug 7, 2:29 AM EDT | Flash Flood Warning | PHI | Berks, Lehigh, Northampton | 3 hr |
| Aug 7, 7:20 PM EDT | Special Weather Statement | PHI | Monroe | 40 min |
| Aug 7, 3:02 PM EDT | Special Weather Statement | PHI | Cecil | 28 min |
| Aug 7, 4:50 PM EDT | Special Weather Statement | PHI | Cecil | 40 min |
| Aug 7, 5:39 PM EDT | Special Weather Statement | PHI | Cecil | 36 min |
| Aug 7, 6:31 PM EDT | Special Weather Statement | PHI | Kent | 29 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.