Alert archive / Pennsylvania / Areal Flood Advisories in 2014
Areal Flood Advisory 252, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Mar 30, 2014, 5:10 PM EDT for 4 counties in Pennsylvania. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 30, 2014, 5:10 PM EDT (21:10 UTC)
- Expired
- Mar 30, 2014, 9:00 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 115 km from the middle of the area, began a volume at 21:09 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 12:00Z, 9.2 hours before the alert went out and 223 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
- 100 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 489 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- -34 m²/s²
- 0-3 km storm-relative helicity
- -31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
612
WGUS81 KPHI 302110
FLSPHI
FLOOD ADVISORY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
510 PM EDT SUN MAR 30 2014
PAC029-045-091-101-310100-
/O.NEW.KPHI.FA.Y.0252.140330T2110Z-140331T0100Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONTGOMERY PA-PHILADELPHIA PA-DELAWARE PA-CHESTER PA-
510 PM EDT SUN MAR 30 2014
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED AN
* URBAN AND SMALL STREAM FLOOD ADVISORY FOR...
MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
WEST CENTRAL PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 900 PM EDT
* AT 507 PM EDT METEOROLOGISTS WERE MONITORING AN AREA OF MODERATE
TO HEAVY RAIN IN SOUTHEASTERN PENNSYLVANIA. THIS RAIN WAS
SPREADING WEST. WITH THE HEAVY RAIN YESTERDAY AND LAST
NIGHT...THE GROUND IS NEARLY SATURATED AND ANY ADDITIONAL RAINFALL
WILL QUICKLY BECOME RUNOFF AND COULD LEAD TO PONDING IN POOR
DRAINAGE AREAS INCLUDING URBAN LOCATIONS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLOOD ADVISORY MEANS RIVER OR STREAM FLOWS ARE ELEVATED OR PONDING
OF WATER IN URBAN OR OTHER AREAS IS OCCURRING OR IS IMMINENT.
&&
LAT...LON 3987 7601 3988 7599 3990 7600 4014 7588
4035 7541 4007 7505 3984 7549 3984 7564
3978 7573 3973 7577 3973 7608
$$
SFJ2 follow-up statements
893
WGUS81 KPHI 302336
FLSPHI
FLOOD ADVISORY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
736 PM EDT SUN MAR 30 2014
PAC029-045-091-101-310100-
/O.CON.KPHI.FA.Y.0252.000000T0000Z-140331T0100Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONTGOMERY PA-PHILADELPHIA PA-DELAWARE PA-CHESTER PA-
736 PM EDT SUN MAR 30 2014
...THE URBAN AND SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT UNTIL
900 PM EDT FOR CHESTER...DELAWARE...CENTRAL PHILADELPHIA AND
MONTGOMERY COUNTIES...
AT 734 PM EDT LIGHT TO MODERATE RAIN WAS CONTINUING TO MOVE INTO THE
ADVISORY AREA. WITH THE HEAVY RAIN YESTERDAY AND LAST
NIGHT...THE GROUND IS NEARLY SATURATED AND ANY ADDITIONAL RAINFALL
WILL QUICKLY BECOME RUNOFF AND COULD LEAD TO PONDING IN POOR
DRAINAGE AREAS INCLUDING URBAN LOCATIONS. IN ADDITION...SMALL
STREAMS AND CREEKS COULD BE VERY NEAR BANKFULL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLOOD ADVISORY MEANS RIVER OR STREAM FLOWS ARE ELEVATED OR PONDING
OF WATER IN URBAN OR OTHER AREAS IS OCCURRING OR IS IMMINENT.
&&
LAT...LON 3987 7601 3988 7599 3990 7600 4014 7588
4035 7541 4007 7505 3984 7549 3984 7564
3978 7573 3973 7577 3973 7608
$$
SFJ902
WGUS81 KPHI 310052
FLSPHI
FLOOD ADVISORY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
852 PM EDT SUN MAR 30 2014
PAC029-045-091-101-310102-
/O.EXP.KPHI.FA.Y.0252.000000T0000Z-140331T0100Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONTGOMERY PA-PHILADELPHIA PA-DELAWARE PA-CHESTER PA-
852 PM EDT SUN MAR 30 2014
...THE URBAN AND SMALL STREAM FLOOD ADVISORY WILL EXPIRE AT 900 PM
EDT FOR CHESTER...DELAWARE...CENTRAL PHILADELPHIA AND MONTGOMERY
COUNTIES...
RAIN HAS MOSTLY MOVED OUT OF THE ADVISORY AREA...SO THE ADVISORY
WILL BE ALLOWED TO EXPIRE AT 9 PM EDT.
LAT...LON 3987 7601 3988 7599 3990 7600 4014 7588
4035 7541 4007 7505 3984 7549 3984 7564
3978 7573 3973 7577 3973 7608
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 10:07 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| Mar 29, 10:12 PM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 4 hr |
| Mar 30, 3:50 AM EDT | Winter Weather Advisory | PHI | Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more | 24 hr |
| Mar 30, 3:29 PM EDT | Areal Flood Advisory | PHI | Delaware, Philadelphia | 4 hr |
Nearby
Areal Flood Advisories in Pennsylvania, 2014Every areal flood advisory in 2014
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.