Alert archive / Delaware / Areal Flood Advisories in 2013

Areal Flood Advisory 111, NWS Philadelphia/Mount Holly

July 12, 2013Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this areal flood advisory at Jul 12, 2013, 5:18 PM EDT for Sussex County, Delaware. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Jul 12, 2013, 5:18 PM EDT (21:18 UTC)
Expired: Jul 12, 2013, 9:15 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 18 km from the middle of the area, began a volume at 21:18 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.3 hours before the alert went out and 181 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 892 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -59 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at Jul 12, 3:52 PM EDT, 1 hour 26 minutes earlier.

Area forecast discussion, Jul 12, 3:52 PM EDT, 1 hour 26 minutes before

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Hazardous weather outlook, Jul 12, 3:50 PM EDT, 1 hour 28 minutes before

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In the hours before

Local storm report, Jul 12, 1:43 PM EDT, 3 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
143 PM EDT FRI JUL 12 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0545 AM     FLASH FLOOD      STEVENSVILLE            38.98N  76.31W
07/12/2013                   QUEEN ANNE'S       MD   911 CALL CENTER

            FLOODING ALONG ROUTE 8 JUST SOUTH OF STEVENSVILLE...
            FROM BATTS NECK ROAD SOUTHWARD... WITH ABOUT 4 INCHES OF
            WATER COVERING THE ROAD.

1000 AM     FLASH FLOOD      UPPER PROVIDENCE        39.96N  75.42W
07/12/2013                   DELAWARE           PA   911 CALL CENTER

            WATER RESCUE DUE TO RAPIDLY RISING WATERS. TIME
            ESTIMATED BASED ON RADAR.

1130 AM     FLASH FLOOD      4 E EASTON              38.77N  76.00W
07/12/2013                   TALBOT             MD   911 CALL CENTER

            KINGSTON LANDING ROAD WASHED OUT IN SPOTS AND IS
            CLOSED.

1130 AM     FLOOD            EASTON                  38.77N  76.08W
07/12/2013                   TALBOT             MD   911 CALL CENTER

            4 ROADS CLOSED DUE TO FLOODING INCLUDING HIGHWAYS 309
            AND 328.

&&

EVENT NUMBER PHI1300262 PHI1300263 PHI1300264 PHI1300265

GAINES

Local storm report, Jul 12, 3:15 PM EDT, 2 hours 3 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
315 PM EDT FRI JUL 12 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0545 AM     FLASH FLOOD      STEVENSVILLE            38.98N  76.31W
07/12/2013                   QUEEN ANNE'S       MD   911 CALL CENTER

            FLOODING ALONG ROUTE 8 JUST SOUTH OF STEVENSVILLE...
            FROM BATTS NECK ROAD SOUTHWARD... WITH ABOUT 4 INCHES OF
            WATER COVERING THE ROAD.

1000 AM     FLASH FLOOD      UPPER PROVIDENCE        39.96N  75.42W
07/12/2013                   DELAWARE           PA   911 CALL CENTER

            WATER RESCUE DUE TO RAPIDLY RISING WATERS. TIME
            ESTIMATED BASED ON RADAR.

1130 AM     FLASH FLOOD      4 E EASTON              38.77N  76.00W
07/12/2013                   TALBOT             MD   911 CALL CENTER

            KINGSTON LANDING ROAD WASHED OUT IN SPOTS AND IS
            CLOSED.

1130 AM     FLOOD            EASTON                  38.77N  76.08W
07/12/2013                   TALBOT             MD   911 CALL CENTER

            4 ROADS CLOSED DUE TO FLOODING INCLUDING HIGHWAYS 309
            AND 328.

1130 AM     FLASH FLOOD      EASTON                  38.77N  76.08W
07/12/2013                   TALBOT             MD   911 CALL CENTER

            SEVERAL WATER RESCUES IN THE CITY OF EASTON.

0110 PM     FLASH FLOOD      LONG NECK               38.62N  75.15W
07/12/2013                   SUSSEX             DE   PUBLIC

            WATER A FOOT DEEP ON ROADWAYS.

0200 PM     FLASH FLOOD      WILLIAMSVILLE           38.46N  75.13W
07/12/2013                   SUSSEX             DE   LAW ENFORCEMENT

            ROAD CLOSURES DUE TO ROADWAY COLLAPSE ALONG PORTIONS OF
            LIGHTHOUSE ROAD AND SAND COVE ROAD.

0215 PM     FLASH FLOOD      DOVER                   39.16N  75.52W
07/12/2013                   KENT               DE   LAW ENFORCEMENT

            SEVERAL VEHICLES STRANDED IN HIGH WATER IN THE DOVER
            AREA. NUMEROUS ROADS FLOODED IN THE DOVER AREA WITH
            WATER A FOOT DEEP.

0255 PM     FLASH FLOOD      FRANKFORD               38.52N  75.23W
07/12/2013                   SUSSEX             DE   TRAINED SPOTTER

            6 INCHES OF WATER IN ROADWAYS. WATER RESUCES IN
            PROGRESS IN MILLVILLE AND OCEANVIEW

&&

EVENT NUMBER PHI1300262 PHI1300263 PHI1300264 PHI1300265 PHI1300267
PHI1300266 PHI1300270 PHI1300269 PHI1300268

GAINES/GORSE

Local storm report, Jul 12, 4:39 PM EDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
439 PM EDT FRI JUL 12 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0545 AM     FLASH FLOOD      STEVENSVILLE            38.98N  76.31W
07/12/2013                   QUEEN ANNE'S       MD   911 CALL CENTER

            FLOODING ALONG ROUTE 8 JUST SOUTH OF STEVENSVILLE...
            FROM BATTS NECK ROAD SOUTHWARD... WITH ABOUT 4 INCHES OF
            WATER COVERING THE ROAD.

1000 AM     FLASH FLOOD      UPPER PROVIDENCE        39.96N  75.42W
07/12/2013                   DELAWARE           PA   911 CALL CENTER

            WATER RESCUE DUE TO RAPIDLY RISING WATERS. TIME
            ESTIMATED BASED ON RADAR.

1130 AM     FLASH FLOOD      4 E EASTON              38.77N  76.00W
07/12/2013                   TALBOT             MD   911 CALL CENTER

            KINGSTON LANDING ROAD WASHED OUT IN SPOTS AND IS
            CLOSED.

1130 AM     FLOOD            EASTON                  38.77N  76.08W
07/12/2013                   TALBOT             MD   911 CALL CENTER

            4 ROADS CLOSED DUE TO FLOODING INCLUDING HIGHWAYS 309
            AND 328.

1130 AM     FLASH FLOOD      EASTON                  38.77N  76.08W
07/12/2013                   TALBOT             MD   911 CALL CENTER

            SEVERAL WATER RESCUES IN THE CITY OF EASTON.

0110 PM     FLASH FLOOD      LONG NECK               38.62N  75.15W
07/12/2013                   SUSSEX             DE   PUBLIC

            WATER A FOOT DEEP ON ROADWAYS.

0200 PM     FLASH FLOOD      WILLIAMSVILLE           38.46N  75.13W
07/12/2013                   SUSSEX             DE   LAW ENFORCEMENT

            ROAD CLOSURES DUE TO ROADWAY COLLAPSE ALONG PORTIONS OF
            LIGHTHOUSE ROAD AND SAND COVE ROAD.

0215 PM     FLASH FLOOD      DOVER                   39.16N  75.52W
07/12/2013                   KENT               DE   LAW ENFORCEMENT

            SEVERAL VEHICLES STRANDED IN HIGH WATER IN THE DOVER
            AREA. NUMEROUS ROADS FLOODED IN THE DOVER AREA WITH
            WATER A FOOT DEEP.

0255 PM     FLASH FLOOD      FRANKFORD               38.52N  75.23W
07/12/2013                   SUSSEX             DE   TRAINED SPOTTER

            6 INCHES OF WATER IN ROADWAYS. WATER RESUCES IN
            PROGRESS IN MILLVILLE AND OCEANVIEW

0335 PM     FLASH FLOOD      DOVER                   39.16N  75.52W
07/12/2013                   KENT               DE   PUBLIC

            WATER SEVERAL FEET DEEP IN THE KENT GENERAL HOSPITAL
            PARKING LOT

0430 PM     FLASH FLOOD      DAGSBORO                38.55N  75.25W
07/12/2013                   SUSSEX             DE   LAW ENFORCEMENT

            HIGH WATER ON VINES CREEK... WARREN WINGATE... HOLTS
            LANDING AND WALTERSBLUFF ROADS.

0434 PM     FLASH FLOOD      MILLSBORO               38.59N  75.29W
07/12/2013                   SUSSEX             DE   LAW ENFORCEMENT

            HIGH WATER ON HARDSCRABBLE ROAD... SHORTLY ROAD...
            KENDALL STREET AND LAUREL ROADS.

&&

EVENT NUMBER PHI1300262 PHI1300263 PHI1300264 PHI1300265 PHI1300267
PHI1300266 PHI1300270 PHI1300269 PHI1300268 PHI1300271 PHI1300272
PHI1300274

GAINES/GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 3:45 AM EDT	Small Craft Advisory	PHI		25 hr
Jul 12, 4:08 AM EDT	Flash Flood Watch	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	17 hr
Jul 12, 2:29 PM EDT	Areal Flood Advisory	PHI	Cape May	6 hr
Jul 12, 4:00 PM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May, Cumberland, Salem	7 hr
Jul 12, 4:04 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 2 more	4 hr
Jul 12, 4:23 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth, Somerset	4 hr
Jul 12, 4:47 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	4 hr
Jul 12, 5:54 PM EDT	Special Weather Statement	PHI	Atlantic, Camden	66 min
Jul 12, 6:54 PM EDT	Special Weather Statement	PHI	Atlantic, Camden	66 min
Jul 12, 7:57 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Gloucester, Ocean	63 min
Jul 12, 9:13 AM EDT	Areal Flood Advisory	PHI	Chester, Delaware, Montgomery	4 hr
Jul 12, 10:01 AM EDT	Flash Flood Warning	PHI	Delaware	4 hr
Jul 12, 10:49 AM EDT	Areal Flood Advisory	PHI	Chester	4 hr
Jul 12, 7:21 AM EDT	Areal Flood Advisory	PHI	Sussex	10 hr
Jul 12, 9:20 AM EDT	Areal Flood Advisory	PHI	Kent, Sussex	8 hr
Jul 12, 12:15 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle	14 hr
Jul 12, 1:18 PM EDT	Flash Flood Warning	PHI	Kent	4 hr
Jul 12, 1:24 PM EDT	Flash Flood Warning	PHI	Sussex	4 hr
Jul 12, 1:33 PM EDT	Flash Flood Warning	PHI	Sussex	4 hr

Nearby

Areal Flood Advisories in Delaware, 2013 Every areal flood advisory 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.