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 Mar 21, 2011, 6:12 AM EDT for 4 states. It was in force for 63 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
- Mar 21, 2011, 6:12 AM EDT (10:12 UTC)
- Expired
- Mar 21, 2011, 7:15 AM EDT
- In force
- 63 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties New Castle County, DE, Cecil County, MD, Salem County, NJ, Chester County, PA, Delaware County, PA
The radar
The Dover AFB radar (KDOX), 94 km from the middle of the area, began a volume at 10:16 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
Wallops Is Stn, VA (KWAL), launched 00:00Z, 10.2 hours before the alert went out and 192 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1228 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 197 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
038
WWUS81 KPHI 211012
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
612 AM EDT MON MAR 21 2011
DEZ001-MDZ008-NJZ016>018-021-PAZ067-070-071-211115-
CAMDEN NJ-CECIL MD-CHESTER PA-CUMBERLAND NJ-DELAWARE PA-GLOUCESTER NJ-
NEW CASTLE DE-PHILADELPHIA PA-SALEM NJ-
612 AM EDT MON MAR 21 2011
...A CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT CAMDEN...CECIL...
CHESTER...CUMBERLAND...DELAWARE...GLOUCESTER...NEW CASTLE...
PHILADELPHIA AND SALEM COUNTIES...
AT 606 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF STRONG THUNDERSTORMS OVER SOUTH CENTRAL AND SOUTHEAST
PENNSYLVANIA...MOVING EAST AT 40 MPH. THESE THUNDERSTORMS WILL BE
NEAR MOUNT VERNON...OXFORD AROUND 630 AM...LADENBERG...NORTH STAR
AROUND 645 AM...PENNS GROVE...WILMINGTON AROUND 700 AM...MULLICA
HILL AND WENONAH AROUND 715 AM.
WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS...AS WELL AS PEA
SIZED HAIL.
LAT...LON 3973 7623 3973 7615 3978 7607 3987 7601
3996 7600 4007 7594 3991 7508 3934 7529
3937 7542 3943 7548 3946 7555 3950 7557
3958 7554 3958 7556 3946 7558 3940 7551
3948 7601 3953 7599 3954 7607 3970 7624
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 21, 6:51 AM EDT | Special Weather Statement | PHI | Cumberland, Gloucester, Salem | 54 min |
| Mar 21, 7:58 AM EDT | Special Weather Statement | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 92 min |
Nearby
Special Weather Statements in Pennsylvania, 2011Special Weather Statements in New Jersey, 2011Special Weather Statements in Maryland, 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.