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 May 7, 2011, 4:29 PM EDT for 4 counties in Pennsylvania. It was in force for 91 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
- May 7, 2011, 4:29 PM EDT (20:29 UTC)
- Expired
- May 7, 2011, 6:00 PM EDT
- In force
- 91 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 85 km from the middle of the area, began a volume at 20:32 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, 8.5 hours before the alert went out and 217 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
- 9 J/kg
- Mixed-layer CIN
- -138 J/kg
- Mixed-layer LCL
- 1218 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
427
WWUS81 KPHI 072029
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
429 PM EDT SAT MAY 7 2011
PAZ060-061-067>071-072200-
BERKS PA-BUCKS PA-CHESTER PA-DELAWARE PA-LEHIGH PA-MONTGOMERY PA-
PHILADELPHIA PA-
429 PM EDT SAT MAY 7 2011
...SHOWERS AND ISOLATED THUNDERSTORMS WITH STRONG WIND GUSTS WILL
AFFECT PARTS OF DELAWARE...PHILADELPHIA...CHESTER...MONTGOMERY...
BERKS...LEHIGH AND BUCKS COUNTIES...
AT 423 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS WITH STRONG WIND GUSTS ALONG A LINE EXTENDING FROM 5 MILES
SOUTHEAST OF ALLENTOWN TO 9 MILES SOUTHEAST OF READING...MOVING
SOUTHEAST AT 30 MPH. A WIND GUST OF 37 MPH OCCURRED AT READING
REGIONAL AIRPORT. THE SHOWERS AND ISOLATED THUNDERSTORMS WILL BE
NEAR RICHLANDTOWN...PLEASANT VALLEY...CEDARVILLE...SOUTH POTTSTOWN
AROUND 435 PM...GLENMOORE...TRUMBAUERSVILLE...SANATOGA...QUAKERTOWN
AROUND 440 PM...PUGHTOWN AND SPRING MOUNT AROUND 445 PM.
WIND GUSTS TO 40 MPH ARE LIKELY AND MAYBE EVEN SOME SMALL HAIL ARE
POSSIBLE WITH THE STRONGEST SHOWERS. TEMPERATURES WILL ALSO DROP
AROUND TEN DEGREES AS THE SHOWERS MOVE THROUGH.
LAT...LON 4021 7599 4063 7541 4061 7539 4058 7541
4054 7535 4056 7530 4036 7495 4032 7493
4030 7487 4024 7484 4021 7478 3985 7528
3985 7531 3984 7537 4014 7590
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 9:54 PM EDT | Special Marine Warning | PHI | 96 min | |
| May 7, 3:00 PM EDT | Special Weather Statement | PHI | Sussex | 90 min |
| May 7, 3:11 PM EDT | Special Weather Statement | PHI | Warren | 64 min |
| May 7, 5:20 PM EDT | Special Weather Statement | PHI | Camden, Hunterdon, Mercer, Somerset | 85 min |
| May 7, 6:52 PM EDT | Special Marine Warning | PHI | 53 min | |
| May 7, 12:03 PM EDT | Special Weather Statement | PHI | Monroe | 57 min |
| May 7, 1:13 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 92 min |
| May 6, 9:17 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 58 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.