Alert archive / Delaware / Flash Flood Warnings in 2013

Flash Flood Warning 7, NWS Philadelphia/Mount Holly

June 7, 2013Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 7, 2013, 10:21 PM EDT for Kent County, Sussex County, Delaware. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 7, 2013, 10:21 PM EDT (02:21 UTC)
Expired: Jun 8, 2013, 2:15 AM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Kent County, DE, Sussex County, DE

The radar

The Dover AFB radar (KDOX), 14 km from the middle of the area, began a volume at 02:22 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 00:00Z, 2.4 hours before the alert went out and 91 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: 32 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 679 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

363 
WGUS51 KPHI 080221
FFWPHI
DEC001-005-080615-
/O.NEW.KPHI.FF.W.0007.130608T0221Z-130608T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1021 PM EDT FRI JUN 7 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN KENT COUNTY...
  SUSSEX COUNTY...

* UNTIL 215 AM EDT...

* AT 1018 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
VERY HEAVY RAIN FROM POST TROPICAL CYCLONE ANDREA ENTERING SOUTHERN 
KENT AND SUSSEX COUNTIES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GEORGETOWN.

RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE WARNED 
AREA. THIS IS ON TOP OF THE ONE INCH OF RAIN THAT FELL EARLIER 
TODAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 3846 7571 3886 7573 3905 7536 3899 7530
      3893 7530 3893 7532 3881 7518 3879 7515
      3879 7511 3881 7510 3880 7508 3860 7504
      3845 7505 3845 7552

$$

KRUZDLO

1 follow-up statement

635 
WGUS71 KPHI 080508
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
108 AM EDT SAT JUN 8 2013

DEC001-005-080518-
/O.CAN.KPHI.FF.W.0007.000000T0000Z-130608T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENT DE-SUSSEX DE-
108 AM EDT SAT JUN 8 2013

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SUSSEX AND SOUTHERN
KENT COUNTIES...

THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING AND FLOOD WATERS
NO LONGER POSE A THREAT TO LIFE OR PROPERTY. THEREFORE...THE FLASH
FLOOD WARNING HAS BEEN CANCELLED.

LAT...LON 3846 7571 3886 7573 3905 7536 3899 7530
      3893 7530 3893 7532 3881 7518 3879 7515
      3879 7511 3881 7510 3880 7508 3860 7504
      3845 7505 3845 7552

$$

KRUZDLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 1:11 AM EDT	Areal Flood Advisory	PHI	Kent, New Castle	4 hr
Jun 8, 5:39 AM EDT	Areal Flood Warning	PHI	Kent	4 hr
Jun 8, 9:17 AM EDT	Areal Flood Warning	PHI	Kent	14 hr

Nearby

Flash Flood Warnings in Delaware, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.