Alert archive / New Jersey / Flash Flood Warnings in 2013

Flash Flood Warning 47, NWS Philadelphia/Mount Holly

July 28, 2013Kent County, New Castle County, Delaware; 4 counties in New Jersey; Kent County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 28, 2013, 9:04 PM EDT for Kent County, New Castle County, Delaware; 4 counties in New Jersey; Kent County, Queen Anne's County, Maryland. It was in force for 4 hr. 2 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: Jul 28, 2013, 9:04 PM EDT (01:04 UTC)
Expired: Jul 29, 2013, 1:00 AM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Kent County, DE, New Castle County, DE, Kent County, MD, Queen Anne's County, MD, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 74 km from the middle of the area, began a volume at 01:06 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
Jul 28, 9:42 PM EDT	FLASH FLOOD	Bridgeton, NJ	FLOODING ALONG ROUTE 77 ON NORTH PEARL STREET.
Jul 28, 9:42 PM EDT	FLASH FLOOD	Upper Deerfield Twp, NJ	FLOODING ALONG ROUTE 77

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 1.1 hours before the alert went out and 173 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 610 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 965 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

283 
WGUS51 KPHI 290104
FFWPHI
DEC001-003-MDC029-035-NJC007-011-015-033-290500-
/O.NEW.KPHI.FF.W.0047.130729T0104Z-130729T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
904 PM EDT SUN JUL 28 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN CAMDEN COUNTY...
  EASTERN GLOUCESTER COUNTY...
  SOUTHERN NEW CASTLE COUNTY...
  NORTHEASTERN KENT COUNTY MARYLAND...
  NORTHWESTERN KENT COUNTY DELAWARE...
  NORTHEASTERN QUEEN ANNE'S COUNTY...
  SALEM COUNTY...
  NORTHWESTERN CUMBERLAND COUNTY...

* UNTIL 100 AM EDT...

* AT 900 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN EXTENDING FROM AROUND MILLINGTON IN MARYLAND TO
  CHAMBERSVILLE IN DELAWARE. THE HEAVY RAIN CONTINUED NORTHEASTWARD
  ACROSS DELAWARE BAY TO EASTERN SALEM COUNTY...WESTERN CUMBERLAND
  COUNTY...EASTERN GLOUCESTER COUNTY AND EASTERN CAMDEN COUNTY. THE
  HEAVY RAIN WILL REMAIN OVER THE SAME GENERAL AREA THROUGH AT LEAST
  1100 PM. AS A RESULT...FLASH FLOODING IS EXPECTED. SOME LOCATIONS
  MAY RECEIVE FROM THREE TO FIVE INCHES OF RAINFALL IN A SHORT AMOUNT
  OF TIME.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IF YOU ARE 
IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS 
LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO 
PROTECT LIFE AND PROPERTY. NEVER ATTEMPT TO CROSS SWIFTLY FLOWING 
WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR IN AN AUTOMOBILE. TURN 
AROUND DON'T DROWN!

&&

LAT...LON 3937 7591 3938 7577 3945 7577 3956 7556
      3955 7556 3948 7558 3944 7555 3958 7553
      3989 7494 3979 7490 3979 7481 3973 7474
      3951 7498 3934 7534 3945 7554 3937 7550
      3929 7542 3910 7584 3933 7598

$$

IOVINO

3 follow-up statements

009 
WGUS71 KPHI 290154
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
954 PM EDT SUN JUL 28 2013

MDC029-035-290200-
/O.CAN.KPHI.FF.W.0047.000000T0000Z-130729T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENT MD-QUEEN ANNE'S MD-
954 PM EDT SUN JUL 28 2013

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHEASTERN QUEEN
ANNE'S AND NORTHEASTERN KENT COUNTIES...

THE HEAVY RAINFALL HAS MOVED TO THE EAST OF THE MARYLAND AND 
DELAWARE BORDER. AS A RESULT, THE FLASH FLOOD WARNING HAS BEEN 
CANCELLED FOR THE COUNTIES OF KENT AND QUEEN ANNE'S IN MARYLAND.

LAT...LON 3948 7573 3955 7556 3947 7558 3944 7556
      3944 7555 3958 7553 3989 7495 3978 7489
      3979 7481 3973 7474 3951 7498 3934 7533
      3945 7554 3937 7550 3929 7542 3915 7574
      3915 7575 3945 7577

$$

DEC001-003-NJC007-011-015-033-290500-
/O.CON.KPHI.FF.W.0047.000000T0000Z-130729T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-GLOUCESTER NJ-NEW CASTLE DE-KENT DE-SALEM NJ-CUMBERLAND NJ-
954 PM EDT SUN JUL 28 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 AM EDT FOR
NORTHWESTERN CUMBERLAND...SALEM...NORTHWESTERN KENT...SOUTHERN NEW 
CASTLE...EASTERN GLOUCESTER AND EASTERN CAMDEN COUNTIES...

AT 950 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
VERY HEAVY RAIN EXTENDING FROM AROUND ODESSA AND CHAMBERSVILLE IN 
DELAWARE...ACROSS DELAWARE BAY TO EASTERN SALEM COUNTY...WESTERN 
CUMBERLAND COUNTY...EASTERN GLOUCESTER COUNTY AND EASTERN CAMDEN 
COUNTY IN NEW JERSEY. THE  HEAVY RAIN WILL REMAIN OVER THE SAME 
GENERAL AREA THROUGH AT LEAST 1100 PM. AS A RESULT...FLASH FLOODING 
IS EXPECTED. SOME LOCATIONS MAY RECEIVE A TOTAL OF THREE TO FIVE 
INCHES OF RAINFALL IN A SHORT AMOUNT OF TIME.

LAT...LON 3948 7573 3955 7556 3947 7558 3944 7556
      3944 7555 3958 7553 3989 7495 3978 7489
      3979 7481 3973 7474 3951 7498 3934 7533
      3945 7554 3937 7550 3929 7542 3915 7574
      3915 7575 3945 7577

$$

IOVINO

528 
WGUS71 KPHI 290228
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1028 PM EDT SUN JUL 28 2013

DEC001-003-290235-
/O.CAN.KPHI.FF.W.0047.000000T0000Z-130729T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW CASTLE DE-KENT DE-
1028 PM EDT SUN JUL 28 2013

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHWESTERN KENT
AND SOUTHERN NEW CASTLE COUNTIES...

THE HEAVIEST OF THE RAIN HAS MOVED TO THE EAST AND NORTHEAST OF 
DELAWARE. AS A RESULT...THE THREAT OF FLASH FLOODING HAS ENDED IN 
THE COUNTIES OF NEW CASTLE AND KENT.

LAT...LON 3953 7497 3951 7498 3934 7532 3937 7540
      3943 7547 3946 7555 3958 7553 3989 7496
      3978 7489 3979 7481 3973 7474

$$

NJC007-011-015-033-290500-
/O.CON.KPHI.FF.W.0047.000000T0000Z-130729T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-GLOUCESTER NJ-SALEM NJ-CUMBERLAND NJ-
1028 PM EDT SUN JUL 28 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 AM EDT FOR
NORTHWESTERN CUMBERLAND...SALEM...GLOUCESTER AND SOUTHERN CAMDEN
COUNTIES...

AT 1020 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE SHOWERS AND THUNDERSTORMS WITH MODERATE TO HEAVY RAINFALL 
OVER PARTS OF SOUTHWESTERN NEW JERSEY. AN ADDITIONAL INCH OR TWO OF 
RAIN IS POSSIBLE AT SOME LOCATIONS. AS A RESULT...THERE MAY CONTINUE 
TO BE SOME LOCALIZED FLASH FLOODING IN THE WARNING AREA.

LAT...LON 3953 7497 3951 7498 3934 7532 3937 7540
      3943 7547 3946 7555 3958 7553 3989 7496
      3978 7489 3979 7481 3973 7474

$$

IOVINO

708 
WGUS71 KPHI 290255
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1055 PM EDT SUN JUL 28 2013

NJC007-011-015-033-290304-
/O.CAN.KPHI.FF.W.0047.000000T0000Z-130729T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-GLOUCESTER NJ-SALEM NJ-CUMBERLAND NJ-
1055 PM EDT SUN JUL 28 2013

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHWESTERN
CUMBERLAND...SALEM...GLOUCESTER AND SOUTHERN CAMDEN COUNTIES...

WHILE SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE TO AFFECT 
PARTS OF SOUTHWESTERN NEW JERSEY DURING THE NIGHT...THE THREAT OF 
FLASH FLOODING HAS ENDED.

LAT...LON 3953 7497 3951 7498 3934 7532 3937 7540
      3943 7547 3946 7555 3958 7553 3989 7496
      3978 7489 3979 7481 3973 7474

$$

IOVINO

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 8:06 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle, Sussex	4 hr
Jul 28, 9:01 PM EDT	Special Weather Statement	PHI	Sussex	44 min
Jul 28, 9:38 PM EDT	Special Weather Statement	PHI	Sussex	67 min
Jul 29, 12:24 AM EDT	Areal Flood Advisory	PHI	New Castle	4 hr
Jul 29, 12:39 AM EDT	Special Weather Statement	PHI	New Castle	66 min
Jul 29, 1:18 AM EDT	Severe Thunderstorm Warning	PHI	New Castle	42 min
Jul 28, 8:15 PM EDT	Areal Flood Warning	PHI	Hunterdon, Morris, Somerset	8 hr
Jul 28, 8:25 PM EDT	Areal Flood Advisory	PHI	Cumberland, Gloucester, Salem	3 hr
Jul 28, 8:38 PM EDT	Special Weather Statement	PHI	Salem	52 min
Jul 28, 9:12 PM EDT	Areal Flood Advisory	PHI	Burlington	4 hr
Jul 28, 9:19 PM EDT	Special Weather Statement	PHI	Salem	41 min
Jul 28, 10:02 PM EDT	Special Weather Statement	PHI	Cumberland	43 min
Jul 28, 10:16 PM EDT	Special Weather Statement	PHI	Camden	29 min
Jul 28, 10:17 PM EDT	Areal Flood Warning	PHI	Burlington, Camden, Gloucester	11 hr
Jul 28, 10:22 PM EDT	Areal Flood Advisory	PHI	Atlantic, Cumberland	4 hr
Jul 28, 11:01 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Ocean	4 hr
Jul 28, 11:06 PM EDT	Special Weather Statement	PHI	Atlantic, Ocean	39 min
Jul 28, 11:25 PM EDT	Special Marine Warning	PHI		50 min
Jul 28, 11:29 PM EDT	Special Weather Statement	PHI	Ocean	31 min
Jul 29, 12:02 AM EDT	Special Weather Statement	PHI	Ocean	28 min
Jul 29, 1:38 AM EDT	Special Weather Statement	PHI	Burlington, Camden, Gloucester	67 min
Jul 29, 1:45 AM EDT	Special Weather Statement	PHI	Sussex, Warren	60 min
Jul 29, 2:38 AM EDT	Special Weather Statement	PHI	Sussex	52 min
Jul 29, 5:13 AM EDT	Areal Flood Warning	PHI	Cumberland, Salem	6 hr
Jul 28, 8:00 PM EDT	Special Weather Statement	PHI	Caroline	45 min
Jul 28, 10:52 PM EDT	Special Weather Statement	PHI	Cecil	53 min
Jul 28, 11:33 PM EDT	Special Weather Statement	PHI	Cecil	42 min
Jul 28, 11:46 PM EDT	Areal Flood Advisory	PHI	Cecil	4 hr
Jul 28, 11:54 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	51 min
Jul 28, 11:59 PM EDT	Special Weather Statement	PHI	Cecil	46 min

Nearby

Flash Flood Warnings in New Jersey, 2013 Flash Flood Warnings in Delaware, 2013 Flash Flood Warnings in Maryland, 2013 Every flash flood warning in 2013

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.