Alert archive / Pennsylvania / Areal Flood Warnings in 2012
Areal Flood Warning 42, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood warning at Dec 21, 2012, 7:49 AM EST for Philadelphia County, Pennsylvania. It was in force for 11 hr. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Dec 21, 2012, 7:49 AM EST (12:49 UTC)
- Expired
- Dec 21, 2012, 6:31 PM EST
- In force
- 11 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 62 km from the middle of the area, began a volume at 12:49 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 21, 8:00 AM EST | COASTAL FLOOD | Philadelphia, PA | MAJOR FLOODING OCCURRED AT THE PHILADELPHIA TIDE GAUGE. TIDE HEIGHT REACHED 10.35 FEET ABOVE MEAN LOWER LOW WATER. MAJOR FLOODING BEGINS AT 10.20 FEET. |
| Dec 21, 8:15 AM EST | FLOOD | Philadelphia, PA | COLUMBUS BOULEVARD CLOSED AT RACE STREET DUE TO FLOODING. |
| Dec 21, 8:15 AM EST | COASTAL FLOOD | Philadelphia, PA | COLUMBUS BOULEVARD CLOSED AT RACE STREET DUE TO FLOODING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 0.8 hours before the alert went out and 214 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
- 6 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 471 m above ground
- 0-6 km bulk shear
- 78 kt
- 0-1 km storm-relative helicity
- 693 m²/s²
- 0-3 km storm-relative helicity
- 1064 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
078
WGUS41 KPHI 211249
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
749 AM EST FRI DEC 21 2012
PAC101-211645-
/O.NEW.KPHI.FA.W.0042.121221T1249Z-121221T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PHILADELPHIA PA-
749 AM EST FRI DEC 21 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS IN...
PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 1145 AM EST
* AT 746 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT UP TO TWO INCHES OF RAIN HAD FALLEN OVERNIGHT. IN RESPONSE, THE
WISSAHICKON CREEK AND PENNYPACK CREEK HAVE BOTH RISEN ABOVE FLOOD
STAGE.
* THE RAIN HAS COME TO END AND BOTH CREEKS WILL BE CRESTING SHORTLY.
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 4003 7500 3996 7513 3989 7513 3987 7521
3988 7526 3994 7523 3997 7528 4001 7521
4005 7526 4008 7523 4008 7517 4005 7511
4013 7502 4012 7497 4008 7496
$$
KRUZDLO3 follow-up statements
957
WGUS41 KPHI 211638
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1138 AM EST FRI DEC 21 2012
PAC101-212045-
/O.EXT.KPHI.FA.W.0042.000000T0000Z-121221T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PHILADELPHIA PA-
1138 AM EST FRI DEC 21 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS IN...
PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 345 PM EST
* AT 1136 AM EST...THE WISSAHICKON AND PENNYPACK CREEKS WERE STILL
OUT OF THEIR BANKS. AS A RESULT, THE FLOOD WARNING HAS BEEN
EXTENDED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
DRIVING INTO FLOOD WATERS COULD PUT YOUR LIFE AT RISK AND COST YOU
THOUSANDS OF DOLLARS IN VEHICLE REPAIRS. FLOOD WATERS MAY BE DEEPER
THAN YOU THINK. TURN AROUND AND FIND AN ALTERNATE ROUTE.
&&
LAT...LON 4003 7500 3996 7513 3989 7513 3987 7521
3988 7526 3994 7523 3997 7528 4001 7521
4005 7526 4008 7523 4008 7517 4005 7511
4013 7502 4012 7497 4008 7496
$$
KRUZDLO953
WGUS41 KPHI 212041
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
341 PM EST FRI DEC 21 2012
PAC101-220045-
/O.EXT.KPHI.FA.W.0042.000000T0000Z-121222T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PHILADELPHIA PA-
341 PM EST FRI DEC 21 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS IN...
PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 745 PM EST
* AT 340 PM EST...THE WISSAHICKON CREEK REMAINED OUT OF ITS BANKS.
THE FLOOD WARNING HAS BEEN EXTENDED.
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 4003 7500 3996 7513 3989 7513 3987 7521
3988 7526 3994 7523 3997 7528 4001 7521
4005 7526 4008 7523 4008 7517 4005 7511
4013 7502 4012 7497 4008 7496
$$
KRUZDLO626
WGUS81 KPHI 212331
FLSPHI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
631 PM EST FRI DEC 21 2012
PAC101-212340-
/O.CAN.KPHI.FA.W.0042.000000T0000Z-121222T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PHILADELPHIA PA-
631 PM EST FRI DEC 21 2012
...THE FLOOD WARNING HAS BEEN CANCELLED FOR URBAN AREAS AND SMALL
STREAMS IN PHILADELPHIA COUNTY...
DRIVING INTO FLOOD WATERS COULD PUT YOUR LIFE AT RISK AND COST YOU
THOUSANDS OF DOLLARS IN VEHICLE REPAIRS. FLOOD WATERS MAY BE DEEPER
THAN YOU THINK. TURN AROUND AND FIND AN ALTERNATE ROUTE.
LAT...LON 4003 7500 3996 7513 3989 7513 3987 7521
3988 7526 3994 7523 3997 7528 4001 7521
4005 7526 4008 7523 4008 7517 4005 7511
4013 7502 4012 7497 4008 7496
$$
HEAVENERThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 20, 9:00 PM EST | Winter Weather Advisory | PHI | Carbon, Monroe | 2 hr |
| Dec 20, 9:11 PM EST | Wind Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 12 hr |
| Dec 21, 12:27 AM EST | Coastal Flood Warning | PHI | Delaware, Philadelphia | 11 hr |
| Dec 21, 4:44 AM EST | Areal Flood Warning | PHI | Chester, Montgomery | 14 hr |
| Dec 21, 5:17 AM EST | Areal Flood Warning | PHI | Delaware | 4 hr |
| Dec 21, 5:39 AM EST | Areal Flood Warning | PHI | Bucks | 10 hr |
| Dec 21, 7:15 AM EST | River Flood Warning | PHI | Delaware | 4 hr |
| Dec 21, 7:36 AM EST | Areal Flood Warning | PHI | Monroe, Northampton | 15 hr |
| Dec 21, 9:24 AM EST | Areal Flood Warning | PHI | Delaware | 4 hr |
| Dec 21, 9:36 AM EST | River Flood Warning | PHI | Bucks | 10 hr |
| Dec 21, 12:08 PM EST | River Flood Warning | PHI | Chester, Delaware | 5 hr |
| Dec 21, 3:16 PM EST | Wind Advisory | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 27 hr |
Nearby
Areal Flood Warnings in Pennsylvania, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.