Alert archive / Delaware / Areal Flood Advisories in 2020

Areal Flood Advisory 30, NWS Philadelphia/Mount Holly

June 11, 2020Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this areal flood advisory at Jun 11, 2020, 6:35 PM EDT for Sussex County, Delaware. It was in force for 115 min.

The area

The counties it named.

The facts

Issued: Jun 11, 2020, 6:35 PM EDT (22:35 UTC)
Expired: Jun 11, 2020, 8:30 PM EDT
In force: 115 min
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 22:36 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, 10.6 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: 908 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 528 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.4

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 Jun 11, 3:49 PM EDT, 2 hours 46 minutes earlier.

Area forecast discussion, Jun 11, 3:49 PM EDT, 2 hours 46 minutes before

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Hazardous weather outlook, Jun 11, 3:42 PM EDT, 2 hours 53 minutes before

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
342 PM EDT Thu Jun 11 2020

DEZ001>003-MDZ008-012-015-019-020-NJZ001-007>010-012-013-015>023-027-
PAZ054-055-060>062-070-071-101>106-121945-
New Castle-Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-
Caroline-Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Mercer-Salem-Gloucester-Camden-
Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May-
Southeastern Burlington-Carbon-Monroe-Berks-Lehigh-Northampton-
Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
342 PM EDT Thu Jun 11 2020

This Hazardous Weather Outlook is for central Delaware, northern
Delaware, southern Delaware, northeast Maryland, central New
Jersey, northern New Jersey, northwest New Jersey, southern New
Jersey, east central Pennsylvania, northeast Pennsylvania and
southeast Pennsylvania.

.DAY ONE...This afternoon and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NJZ014-024>026-121945-
Eastern Monmouth-Atlantic Coastal Cape May-Coastal Atlantic-
Coastal Ocean-
342 PM EDT Thu Jun 11 2020

...HIGH RIP CURRENT RISK IN EFFECT UNTIL 9 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for central New Jersey and
southern New Jersey.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Rip Current Risk.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

DEZ004-121945-
Delaware Beaches-
342 PM EDT Thu Jun 11 2020

...HIGH RIP CURRENT RISK IN EFFECT UNTIL 9 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for southern Delaware.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Rip Current Risk.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ430-431-450>455-121945-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
342 PM EDT Thu Jun 11 2020

This Hazardous Weather Outlook is for Atlantic coastal waters and
Delaware Bay Waters.

.DAY ONE...This afternoon and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Jun 11, 1:59 PM EDT, 4 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
159 PM EDT THU JUN 11 2020

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

0108 PM     FLOOD            2 E CHESTERBROOK        40.07N 75.43W
06/11/2020                   CHESTER            PA   COUNTY OFFICIAL

            FLOODING ON SWEDESBORO ROAD WITH LANE
            RESTRICTIONS.

0136 PM     FLOOD            1 ENE BROOKLAWN         39.88N 75.11W
06/11/2020                   CAMDEN             NJ   DEPT OF HIGHWAYS

            FLOODING ON U.S. HIGHWAY 130 NEAR MARKET
            STREET.

0141 PM     FLOOD            1 WSW MT. EPHRAIM       39.88N 75.10W
06/11/2020                   CAMDEN             NJ   DEPT OF HIGHWAYS

            FLOODING ON INTERSTATE 76 NEAR THE
            INTERSTATE 295 INTERCHANGE.

&&

CMS

Local storm report, Jun 11, 2:04 PM EDT, 4 hours 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
204 PM EDT THU JUN 11 2020

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

0155 PM     FLOOD            1 SSW MERCHANTVILLE     39.94N 75.06W
06/11/2020                   CAMDEN             NJ   FIRE DEPT/RESCUE

            STALLED VEHICLE FROM ROAD FLOODING ON
            LEXINGTON AVENUE.

&&

CMS

Local storm report, Jun 11, 2:11 PM EDT, 4 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
211 PM EDT THU JUN 11 2020

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

0157 PM     FLOOD            1 SW MT. EPHRAIM        39.87N 75.10W
06/11/2020                   CAMDEN             NJ   DEPT OF HIGHWAYS

            FLOODING ON INTERSTATE 295 SOUTHBOUND NEAR
            THE INTERSTATE 76 INTERCHANGE.

&&

CMS

Local storm report, Jun 11, 2:55 PM EDT, 3 hours 40 minutes before

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Local storm report, Jun 11, 2:57 PM EDT, 3 hours 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
257 PM EDT THU JUN 11 2020

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

0245 PM     FLASH FLOOD      LEONARDO                40.41N 74.06W
06/11/2020                   MONMOUTH           NJ   DEPT OF HIGHWAYS

            FLASH FLOODING ON STATE HIGHWAY 36 NEAR
            LEONARD AVENUE. ALL LANES CLOSED.

&&

CMS

Local storm report, Jun 11, 3:47 PM EDT, 2 hours 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
347 PM EDT THU JUN 11 2020

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

0340 PM     FLASH FLOOD      ATLANTIC HIGHLANDS      40.41N 74.04W
06/11/2020                   MONMOUTH           NJ   LAW ENFORCEMENT

            WEST HIGHLAND AVENUE CLOSED FROM FLASH
            FLOODING.

&&

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 3:16 AM EDT	Rip Current Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	18 hr
Jun 11, 1:55 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	3 hr
Jun 11, 1:59 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Monmouth, Ocean	4 hr
Jun 11, 2:15 PM EDT	Flash Flood Warning	PHI	Burlington, Monmouth, Ocean	4 hr
Jun 11, 3:33 PM EDT	Areal Flood Advisory	PHI	Ocean	3 hr
Jun 10, 8:41 PM EDT	Special Weather Statement	PHI	Lebanon	34 min
Jun 10, 9:14 PM EDT	Special Weather Statement	PHI	Lebanon	46 min
Jun 10, 9:28 PM EDT	Special Weather Statement	PHI	Carbon	47 min
Jun 10, 10:04 PM EDT	Special Weather Statement	PHI	Carbon	41 min
Jun 10, 10:22 PM EDT	Areal Flood Advisory	PHI	Carbon	4 hr
Jun 10, 11:07 PM EDT	Areal Flood Advisory	PHI	Monroe	3 hr
Jun 10, 11:36 PM EDT	Special Weather Statement	PHI	Monroe	24 min
Jun 10, 11:53 PM EDT	Special Weather Statement	PHI	Monroe	37 min
Jun 11, 5:04 AM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	3 hr
Jun 11, 7:27 PM EDT	Special Weather Statement	PHI	Sussex	33 min
Jun 11, 7:41 PM EDT	Areal Flood Advisory	PHI	Sussex	2 hr
Jun 11, 7:58 PM EDT	Flash Flood Warning	PHI	Sussex	4 hr

Nearby

Areal Flood Advisories in Delaware, 2020 Every areal flood advisory in 2020

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.