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 Sep 7, 2011, 3:49 PM EDT for Berks County, Chester County, Pennsylvania. It was in force for 56 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
- Sep 7, 2011, 3:49 PM EDT (19:49 UTC)
- Expired
- Sep 7, 2011, 4:45 PM EDT
- In force
- 56 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Berks County, PA, Chester County, PA
The radar
The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 19:52 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, 7.8 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
- 1 J/kg
- Mixed-layer CIN
- -270 J/kg
- Mixed-layer LCL
- 448 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 184 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
742
WWUS81 KPHI 071949
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
349 PM EDT WED SEP 7 2011
DEZ001-PAZ060-061-067-068-070-072045-
BERKS PA-CHESTER PA-DELAWARE PA-LEHIGH PA-MONTGOMERY PA-NEW CASTLE DE-
349 PM EDT WED SEP 7 2011
...STRONG THUNDERSTORMS WILL AFFECT BERKS...CHESTER...DELAWARE...
LEHIGH...MONTGOMERY AND NEW CASTLE COUNTIES...
AT 347 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 18 MILES NORTH OF
READING TO 7 MILES NORTH OF NEWARK...MOVING NORTH AT 30 MPH. THE
THUNDERSTORMS WILL BE NEAR WANAMAKERS...HOCKESSIN AROUND 400 PM...NEW
TRIPOLI...KENILWORTH AROUND 415 PM...WESTTOWN...CHESTER SPRINGS
AROUND 430 PM...GRADYVILLE AND MALVERN AROUND 445 PM.
WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS.
LAT...LON 4064 7597 4074 7576 3993 7545 3967 7578
3972 7579 3973 7582
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 8:28 PM EDT | River Flood Warning | PHI | Morris, Somerset | 14 hr |
| Sep 6, 8:28 PM EDT | River Flood Warning | PHI | Morris, Somerset | 4 days |
| Sep 6, 8:28 PM EDT | River Flood Warning | PHI | Somerset | 3 days |
| Sep 6, 8:28 PM EDT | River Flood Warning | PHI | Hunterdon, Somerset | 56 hr |
| Sep 6, 8:28 PM EDT | River Flood Warning | PHI | Somerset | 14 hr |
| Sep 6, 8:28 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 25 hr |
| Sep 6, 8:28 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 3 days |
| Sep 6, 8:28 PM EDT | River Flood Warning | PHI | Morris | 20 hr |
| Sep 7, 4:15 AM EDT | River Flood Warning | PHI | Morris, Passaic | 3 days |
| Sep 7, 4:34 AM EDT | River Flood Warning | PHI | Bergen, Morris, Passaic | 17 hr |
| Sep 7, 5:42 AM EDT | Areal Flood Warning | PHI | Morris | 28 hr |
| Sep 7, 6:12 AM EDT | Rip Current Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 65 hr |
| Sep 7, 10:05 AM EDT | River Flood Warning | PHI | Sussex, Warren | 60 hr |
| Sep 7, 10:05 AM EDT | River Flood Warning | PHI | Hunterdon, Warren | 67 hr |
| Sep 7, 10:05 AM EDT | River Flood Warning | PHI | Hunterdon, Mercer | 68 hr |
| Sep 7, 10:05 AM EDT | River Flood Warning | PHI | Hunterdon | 67 hr |
| Sep 7, 10:05 AM EDT | River Flood Warning | PHI | Hunterdon | 67 hr |
| Sep 7, 10:05 AM EDT | River Flood Warning | PHI | Hunterdon, Mercer | 64 hr |
| Sep 7, 10:05 AM EDT | River Flood Warning | PHI | Hunterdon, Mercer | 67 hr |
| Sep 7, 10:05 AM EDT | River Flood Warning | PHI | Mercer | 68 hr |
| Sep 7, 11:48 AM EDT | Coastal Flood Advisory | PHI | Burlington, Camden, Cumberland, Gloucester, Salem | 18 hr |
| Sep 7, 7:39 PM EDT | Coastal Flood Warning | PHI | Burlington, Camden, Gloucester | 6 hr |
| Sep 6, 10:31 PM EDT | Areal Flood Warning | PHI | Berks, Lehigh | 15 hr |
| Sep 6, 11:13 PM EDT | River Flood Warning | PHI | Chester, Montgomery, Philadelphia | 3 days |
| Sep 6, 11:19 PM EDT | River Flood Warning | PHI | Montgomery | 17 hr |
| Sep 7, 12:59 AM EDT | River Flood Warning | PHI | Chester, Delaware | 41 hr |
| Sep 7, 3:40 AM EDT | River Flood Warning | PHI | Montgomery, Philadelphia | 54 hr |
| Sep 7, 3:47 AM EDT | River Flood Warning | PHI | Delaware | 4 hr |
| Sep 7, 4:26 AM EDT | River Flood Warning | PHI | Berks, Montgomery | 6 hr |
| Sep 7, 4:26 AM EDT | River Flood Warning | PHI | Montgomery | 3 days |
| Sep 7, 9:48 AM EDT | River Flood Warning | PHI | Lehigh, Northampton | 5 hr |
| Sep 7, 1:32 PM EDT | Special Weather Statement | PHI | Berks | 58 min |
| Sep 7, 1:38 PM EDT | Special Weather Statement | PHI | Lebanon | 52 min |
| Sep 7, 1:50 PM EDT | Areal Flood Advisory | PHI | Berks | 17 min |
| Sep 7, 2:05 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Sep 7, 2:36 PM EDT | Special Weather Statement | PHI | Berks | 54 min |
| Sep 7, 2:39 PM EDT | Special Weather Statement | PHI | Chester | 66 min |
| Sep 7, 3:06 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Sep 7, 3:33 PM EDT | Flash Flood Warning | PHI | Berks, Chester | 4 hr |
| Sep 7, 4:06 PM EDT | River Flood Warning | PHI | Berks, Montgomery | 41 hr |
| Sep 7, 4:06 PM EDT | River Flood Warning | PHI | Berks | 45 hr |
| Sep 7, 4:09 PM EDT | Special Weather Statement | PHI | Bucks, Delaware, Lehigh, Montgomery, Northampton, Philadelphia | 66 min |
| Sep 7, 5:10 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Carbon, Lehigh, Monroe, Montgomery and 1 more | 3 hr |
| Sep 7, 6:07 PM EDT | River Flood Warning | PHI | Chester | 10 hr |
| Sep 7, 7:14 PM EDT | Areal Flood Advisory | PHI | Berks | 65 min |
| Sep 7, 7:21 PM EDT | Areal Flood Warning | PHI | Berks, Chester | 14 hr |
| Sep 7, 7:32 PM EDT | Special Weather Statement | PHI | Berks | 58 min |
| Sep 6, 10:21 PM EDT | Flash Flood Warning | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 3 hr |
| Sep 7, 1:34 PM EDT | Special Weather Statement | PHI | Cecil | 56 min |
| Sep 7, 4:40 PM EDT | River Flood Warning | PHI | Cecil, Harford | 4 days |
| Sep 7, 6:34 PM EDT | Special Weather Statement | PHI | Cecil, Kent, Queen Anne's | 56 min |
| Sep 7, 7:52 PM EDT | Special Weather Statement | PHI | Harford | 53 min |
| Sep 7, 7:32 AM EDT | River Flood Warning | PHI | New Castle | 3 hr |
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.