Alert archive / Pennsylvania / Areal Flood Warnings in 2012
Areal Flood Warning 22, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood warning at Sep 4, 2012, 12:15 PM EDT for 4 states. It was in force for 106 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 4, 2012, 12:15 PM EDT (16:15 UTC)
- Expired
- Sep 4, 2012, 2:01 PM EDT
- In force
- 106 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties New Castle County, DE, Cecil County, MD, Atlantic County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Berks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Dover AFB radar (KDOX), 112 km from the middle of the area, began a volume at 16:15 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 4.3 hours before the alert went out and 45 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
- 869 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 600 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
751
WGUS41 KPHI 041615
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1215 PM EDT TUE SEP 4 2012
DEC003-MDC015-NJC001-007-011-015-033-PAC011-029-045-091-101-042015-
/O.NEW.KPHI.FA.W.0022.120904T1615Z-120904T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-BERKS PA-MONTGOMERY PA-PHILADELPHIA PA-DELAWARE PA-
GLOUCESTER NJ-NEW CASTLE DE-CECIL MD-CHESTER PA-ATLANTIC NJ-SALEM NJ-
CUMBERLAND NJ-
1215 PM EDT TUE SEP 4 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS IN...
WESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
SOUTH CENTRAL BERKS COUNTY IN EASTERN PENNSYLVANIA...
SOUTHERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
WESTERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
NORTHERN CECIL COUNTY IN NORTHEAST MARYLAND...
CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
WEST CENTRAL ATLANTIC COUNTY IN SOUTHERN NEW JERSEY...
SALEM COUNTY IN SOUTHERN NEW JERSEY...
NORTHERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
* UNTIL 415 PM EDT
* AT 1212 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS AND THUNDERSTORMS PRODUCING HEAVY RAINFALL EXTENDING
SOUTHEAST FROM CHESTER AND DELAWARE COUNTIES IN PENNSYLVANIA...
THROUGH NEW CASTLE COUNTY IN DELAWARE...TO SALEM AND GLOUCESTER
COUNTIES IN NEW JERSEY. THE PRECIPITATION WAS MOVING TO THE
NORTHEAST AROUND 15 MPH. THE SHOWERS ARE EXPECTED TO PRODUCE
RAINFALL TOTALS OF AN INCH OR TWO IN A SHORT AMOUNT OF TIME.
LOCALIZED RAINFALL AMOUNTS OF TWO TO THREE INCHES ARE POSSIBLE.
THE HEAVY RAIN WILL CAUSE FLOODING ON AREA ROADWAYS, AS WELL AS
FLOODING IN AREAS OF POOR DRAINAGE AND ALONG SMALL STREAMS AND
CREEKS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
DRIVING INTO FLOOD WATERS COULD PUT YOUR LIFE AT RISK AND COST YOU
THOUSANDS OF DOLLARS IN VEHICLE REPAIRS. FLOOD WATERS MAY BE DEEPER
THAN YOU THINK. TURN AROUND AND FIND AN ALTERNATE ROUTE.
LAT...LON 3978 7606 3988 7600 3996 7600 4003 7594
4011 7595 4014 7589 4016 7591 4032 7564
4016 7522 3946 7477 3948 7555 3950 7556
3948 7559 3949 7600 3952 7599 3954 7606
3959 7610
$$
KRUZDLO2 follow-up statements
323
WGUS81 KPHI 041725
FLSPHI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
125 PM EDT TUE SEP 4 2012
MDC015-NJC011-041732-
/O.CAN.KPHI.FA.W.0022.000000T0000Z-120904T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CECIL MD-CUMBERLAND NJ-
125 PM EDT TUE SEP 4 2012
...THE FLOOD WARNING HAS BEEN CANCELLED FOR URBAN AREAS AND SMALL
STREAMS IN NORTHERN CUMBERLAND AND NORTHERN CECIL COUNTIES...
THE HEAVY RAIN HAS MOVED OUT OF THE AREA.
LAT...LON 3946 7479 3953 7501 3957 7506 3955 7507
3976 7583 4016 7591 4032 7564 4016 7522
$$
DEC003-NJC001-007-015-033-PAC011-029-045-091-101-042015-
/O.CON.KPHI.FA.W.0022.000000T0000Z-120904T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-BERKS PA-MONTGOMERY PA-PHILADELPHIA PA-DELAWARE PA-
GLOUCESTER NJ-NEW CASTLE DE-CHESTER PA-ATLANTIC NJ-SALEM NJ-
125 PM EDT TUE SEP 4 2012
...THE FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM EDT FOR URBAN
AREAS AND SMALL STREAMS IN NORTHERN SALEM...WEST CENTRAL ATLANTIC...
CHESTER...NORTHERN NEW CASTLE...GLOUCESTER...DELAWARE...WESTERN
PHILADELPHIA...SOUTHERN MONTGOMERY...SOUTHEASTERN BERKS AND WESTERN
CAMDEN COUNTIES...
AT 122 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS AND THUNDERSTORMS PRODUCING HEAVY RAINFALL EXTENDING
SOUTHEAST FROM CHESTER AND DELAWARE COUNTIES IN PENNSYLVANIA...
THROUGH NORTHERN NEW CASTLE COUNTY IN DELAWARE...TO SALEM AND
GLOUCESTER COUNTIES IN NEW JERSEY. THE PRECIPITATION WAS MOVING TO
THE NORTHEAST AROUND 15 MPH. THE SHOWERS ARE EXPECTED TO PRODUCE
RAINFALL TOTALS OF AN INCH OR TWO IN A SHORT AMOUNT OF TIME.
LOCALIZED RAINFALL AMOUNTS OF TWO TO THREE INCHES ARE POSSIBLE.
THE HEAVY RAIN WILL CAUSE FLOODING ON AREA ROADWAYS, AS WELL AS
FLOODING IN AREAS OF POOR DRAINAGE AND ALONG SMALL STREAMS AND
CREEKS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
DRIVING INTO FLOOD WATERS COULD PUT YOUR LIFE AT RISK AND COST YOU
THOUSANDS OF DOLLARS IN VEHICLE REPAIRS. FLOOD WATERS MAY BE DEEPER
THAN YOU THINK. TURN AROUND AND FIND AN ALTERNATE ROUTE.
&&
LAT...LON 3946 7479 3953 7501 3957 7506 3955 7507
3976 7583 4016 7591 4032 7564 4016 7522
$$
KRUZDLO443
WGUS81 KPHI 041801
FLSPHI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
201 PM EDT TUE SEP 4 2012
DEC003-NJC001-007-015-033-PAC011-029-045-091-101-041808-
/O.CAN.KPHI.FA.W.0022.000000T0000Z-120904T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-BERKS PA-MONTGOMERY PA-PHILADELPHIA PA-DELAWARE PA-
GLOUCESTER NJ-NEW CASTLE DE-CHESTER PA-ATLANTIC NJ-SALEM NJ-
201 PM EDT TUE SEP 4 2012
...THE FLOOD WARNING HAS BEEN CANCELLED FOR URBAN AREAS AND SMALL
STREAMS IN NORTHERN SALEM...WEST CENTRAL ATLANTIC...CHESTER...
NORTHERN NEW CASTLE...GLOUCESTER...DELAWARE...WESTERN PHILADELPHIA...
SOUTHERN MONTGOMERY...SOUTHEASTERN BERKS AND WESTERN CAMDEN
COUNTIES...
ALTHOUGH THIS BROAD FLOOD WARNING HAS BEEN CANCELLED, A CONCENTRATED
FLASH FLOOD WARNING REMAINS UP FOR THE URBAN AREAS ACROSS THE
DELAWARE VALLEY.
LAT...LON 3946 7479 3953 7501 3957 7506 3955 7507
3976 7583 4016 7591 4032 7564 4016 7522
$$
KRUZDLOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 12:13 AM EDT | Areal Flood Advisory | PHI | Chester | 111 min |
| Sep 4, 3:41 AM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery, Philadelphia | 2 hr |
| Sep 4, 4:00 AM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 84 min |
| Sep 4, 12:08 PM EDT | Areal Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| Sep 4, 1:47 PM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 3 hr |
| Sep 4, 2:22 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 1 more | 4 hr |
| Sep 4, 2:59 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 61 min |
| Sep 4, 3:11 PM EDT | River Flood Warning | PHI | Delaware | 50 min |
| Sep 4, 3:32 PM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 4 hr |
| Sep 4, 3:40 PM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 4 hr |
| Sep 4, 4:37 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Sep 4, 5:22 PM EDT | Special Weather Statement | PHI | Philadelphia | 53 min |
| Sep 4, 6:10 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Philadelphia | 65 min |
| Sep 4, 6:34 PM EDT | Special Weather Statement | PHI | Lehigh | 56 min |
| Sep 4, 7:01 PM EDT | Areal Flood Warning | PHI | Philadelphia | 55 min |
| Sep 4, 7:06 PM EDT | Areal Flood Advisory | PHI | Bucks, Carbon, Lehigh, Monroe, Northampton | 114 min |
| Sep 4, 7:33 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe, Northampton | 6 hr |
| Sep 4, 12:39 PM EDT | Rip Current Statement | PHI | Sussex | 56 hr |
| Sep 3, 9:28 PM EDT | Areal Flood Advisory | PHI | Burlington, Ocean | 3 hr |
| Sep 4, 12:05 AM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Monmouth, Ocean | 4 hr |
| Sep 4, 1:25 AM EDT | Areal Flood Advisory | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean, Somerset | 4 hr |
| Sep 4, 1:34 AM EDT | Flash Flood Warning | PHI | Burlington, Ocean | 6 hr |
| Sep 4, 1:55 AM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Gloucester | 4 hr |
| Sep 4, 3:48 AM EDT | Areal Flood Advisory | PHI | Ocean | 3 hr |
| Sep 4, 4:44 AM EDT | Areal Flood Advisory | PHI | Ocean | 2 hr |
| Sep 4, 4:55 AM EDT | Small Craft Advisory | PHI | 47 hr | |
| Sep 4, 6:47 AM EDT | Areal Flood Warning | PHI | Burlington, Ocean | 3 hr |
| Sep 4, 1:13 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 62 min |
| Sep 4, 1:36 PM EDT | Flash Flood Warning | PHI | Monmouth, Ocean | 4 hr |
| Sep 4, 1:58 PM EDT | Special Weather Statement | PHI | Burlington | 62 min |
| Sep 4, 2:11 PM EDT | Special Weather Statement | PHI | Monmouth | 34 min |
| Sep 4, 3:13 PM EDT | Tornado Warning | PHI | Burlington, Ocean | 32 min |
| Sep 4, 4:13 PM EDT | Areal Flood Advisory | PHI | Burlington, Monmouth, Ocean | 54 min |
| Sep 4, 6:02 PM EDT | Areal Flood Warning | PHI | Burlington | 16 hr |
| Sep 4, 6:30 PM EDT | Tornado Warning | PHI | Burlington, Camden | 30 min |
| Sep 4, 7:15 PM EDT | Special Weather Statement | PHI | Mercer | 60 min |
Nearby
Areal Flood Warnings in Pennsylvania, 2012Areal Flood Warnings in New Jersey, 2012Areal Flood Warnings in Delaware, 2012Every areal flood warning in 2012
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.