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 6, 2011, 3:14 PM EST for Chester County, Delaware County, Montgomery County, Pennsylvania; Cecil County, Maryland; New Castle County, Delaware. It was in force for 61 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 6, 2011, 3:14 PM EST (20:14 UTC)
- Expired
- Mar 6, 2011, 4:15 PM EST
- In force
- 61 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties New Castle County, DE, Cecil County, MD, Chester County, PA, Delaware County, PA, Montgomery County, PA
The radar
The Dover AFB radar (KDOX), 102 km from the middle of the area, began a volume at 20:13 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 12:00Z, 8.2 hours before the alert went out and 175 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
- 465 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 341 m²/s²
- 0-3 km storm-relative helicity
- 335 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
371
WWUS81 KPHI 062014
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
314 PM EST SUN MAR 6 2011
DEZ001-MDZ008-NJZ016-017-PAZ067>071-062115-
BUCKS PA-CECIL MD-CHESTER PA-DELAWARE PA-GLOUCESTER NJ-MONTGOMERY PA-
NEW CASTLE DE-PHILADELPHIA PA-SALEM NJ-
314 PM EST SUN MAR 6 2011
...HEAVY RAIN WILL AFFECT BUCKS...CECIL...CHESTER...DELAWARE...
GLOUCESTER...MONTGOMERY...NEW CASTLE...PHILADELPHIA AND SALEM
COUNTIES...
AT 306 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
AREA OF HEAVY RAIN ACROSS NORTHEAST MARYLAND...MOVING NORTH AT 45
MPH. THE AREA OF HEAVY RAIN WILL AFFECT HOCKESSIN...KENNETT SQUARE
WEST CHESTER...WEST GOSHEN...SCHWENKSVILLE...SPRING MOUNT...TELFORD
AND SOUDERTON.
THE HEAVY RAIN COULD RESULT IN PONDING WATER ON ROADS AND QUICKLY
FILL ROADSIDE DITCHES AND SMALL STREAMS.
LAT...LON 4037 7554 4030 7506 3962 7549 3961 7548
3962 7549 3957 7552 3958 7556 3954 7555
3948 7558 3933 7567 3952 7599 3953 7600
3955 7605
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 6, 3:30 AM EST | Coastal Flood Statement | PHI | Burlington, Camden, Gloucester, Salem | 17 hr |
| Mar 6, 3:37 AM EST | Winter Weather Advisory | PHI | Sussex, Warren | 28 hr |
| Mar 6, 4:41 PM EST | Areal Flood Advisory | PHI | Sussex, Warren | 4 hr |
| Mar 6, 5:01 PM EST | Areal Flood Advisory | PHI | Hunterdon, Morris, Somerset | 12 hr |
| Mar 6, 5:33 PM EST | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Mercer, Salem | 4 hr |
| Mar 6, 5:54 PM EST | Special Weather Statement | PHI | Burlington, Camden | 66 min |
| Mar 6, 6:00 PM EST | Areal Flood Warning | PHI | Sussex, Warren | 6 hr |
| Mar 6, 6:17 PM EST | Areal Flood Warning | PHI | Morris | 32 hr |
| Mar 6, 6:30 PM EST | Areal Flood Advisory | PHI | Atlantic, Camden, Cape May, Cumberland, Middlesex, Monmouth and 2 more | 4 hr |
| Mar 6, 2:19 PM EST | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 6 hr |
| Mar 6, 3:32 PM EST | Areal Flood Warning | PHI | Berks, Monroe | 41 days |
| Mar 6, 4:55 PM EST | Areal Flood Warning | PHI | Carbon, Lehigh, Northampton | 12 hr |
Nearby
Special Weather Statements in Pennsylvania, 2011Special Weather Statements in Maryland, 2011Special Weather Statements in Delaware, 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.