Alert archive / Delaware / Areal Flood Advisories in 2020

Areal Flood Advisory 71, NWS Philadelphia/Mount Holly

July 6, 2020Kent County, New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this areal flood advisory at Jul 6, 2020, 7:48 PM EDT for Kent County, New Castle County, Delaware. It was in force for 117 min.

The area

The counties it named.

The facts

Issued: Jul 6, 2020, 7:48 PM EDT (23:48 UTC)
Expired: Jul 6, 2020, 9:45 PM EDT
In force: 117 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Kent County, DE, New Castle County, DE

The radar

The Dover AFB radar (KDOX), 58 km from the middle of the area, began a volume at 23:49 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, 11.8 hours before the alert went out and 163 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: 1250 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1150 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 57 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 6, 7:34 PM EDT, 14 minutes earlier.

Area forecast discussion, Jul 6, 7:34 PM EDT, 14 minutes before

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Hazardous weather outlook, Jul 6, 3:27 PM EDT, 4 hours 21 minutes before

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
327 PM EDT Mon Jul 6 2020

DEZ002-003-MDZ012-015-019-020-NJZ021-023-071930-
Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-Cumberland-
Cape May-
327 PM EDT Mon Jul 6 2020

...SEVERE THUNDERSTORM WATCH 333 IN EFFECT UNTIL 11 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for central Delaware, southern
Delaware, northeast Maryland 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.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ001-MDZ008-NJZ016-071930-
New Castle-Cecil-Salem-
327 PM EDT Mon Jul 6 2020

...FLASH FLOOD WATCH IN EFFECT UNTIL 9 PM EDT THIS EVENING...
...SEVERE THUNDERSTORM WATCH 333 IN EFFECT UNTIL 11 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for northern Delaware, northeast
Maryland 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.

   Flash Flood Watch.
   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

DEZ004-NJZ024-071930-
Delaware Beaches-Atlantic Coastal Cape May-
327 PM EDT Mon Jul 6 2020

...SEVERE THUNDERSTORM WATCH 333 IN EFFECT UNTIL 11 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for southern Delaware 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.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ450>455-071930-
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-
327 PM EDT Mon Jul 6 2020

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...This afternoon and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ430-431-071930-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
327 PM EDT Mon Jul 6 2020

...SEVERE THUNDERSTORM WATCH 333 IN EFFECT UNTIL 11 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for Delaware Bay Waters.

.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.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ001-007>010-012-013-020-022-027-PAZ054-055-060>062-101-103-105-
071930-
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Western Monmouth-
Ocean-Atlantic-Southeastern Burlington-Carbon-Monroe-Berks-Lehigh-
Northampton-Western Chester-Western Montgomery-Upper Bucks-
327 PM EDT Mon Jul 6 2020

...SEVERE THUNDERSTORM WATCH 333 IN EFFECT UNTIL 11 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for 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.

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

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ015-017>019-PAZ070-071-102-104-106-071930-
Mercer-Gloucester-Camden-Northwestern Burlington-Delaware-
Philadelphia-Eastern Chester-Eastern Montgomery-Lower Bucks-
327 PM EDT Mon Jul 6 2020

...FLASH FLOOD WATCH IN EFFECT UNTIL 9 PM EDT THIS EVENING...
...SEVERE THUNDERSTORM WATCH 333 IN EFFECT UNTIL 11 PM EDT THIS
EVENING...

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

.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.

   Flash Flood Watch.
   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ014-025-026-071930-
Eastern Monmouth-Coastal Atlantic-Coastal Ocean-
327 PM EDT Mon Jul 6 2020

...SEVERE THUNDERSTORM WATCH 333 IN EFFECT UNTIL 11 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.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

In the hours before

Local storm report, Jul 6, 7:06 PM EDT, 42 minutes before

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Local storm report, Jul 6, 7:11 PM EDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
711 PM EDT MON JUL 6 2020

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

0654 PM     HAIL             3 SW SUMMIT BRIDGE      39.51N 75.77W
07/06/2020  E0.50 INCH       NEW CASTLE         DE   PUBLIC

            MPING REPORT.

&&

JEO

Local storm report, Jul 6, 7:16 PM EDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
716 PM EDT MON JUL 6 2020

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

0715 PM     FLASH FLOOD      SINKING SPRING          40.32N 76.02W
07/06/2020                   BERKS              PA   FIRE DEPT/RESCUE

            MULTIPLE CARS STRANDED IN WATER ON SPRING
            ST.

&&

JEO

Local storm report, Jul 6, 7:30 PM EDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
730 PM EDT MON JUL 6 2020

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

0725 PM     HEAVY RAIN       NEWARK                  39.68N 75.76W
07/06/2020  M2.62 INCH       NEW CASTLE         DE   TRAINED SPOTTER

&&

JEO

Local storm report, Jul 6, 7:37 PM EDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
737 PM EDT MON JUL 6 2020

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

0712 PM     TSTM WND GST     TOLCHESTER BEACH        39.22N 76.24W
07/06/2020  M66 MPH          KENT               MD   OTHER FEDERAL

            TCBM2.

&&

JEO

Local storm report, Jul 6, 7:46 PM EDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
746 PM EDT MON JUL 6 2020

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

0616 PM     FUNNEL CLOUD     1 SSW FOLSOM            39.58N 74.85W
07/06/2020                   ATLANTIC           NJ   PUBLIC

            VIDEO OF A FUNNEL CLOUD SHOT FROM NEAR BUENA
            LOOKING TOWARDS FOLSOM. TIME PROVIDED BY THE
            INDIVIDUAL WHO SHOT THE VIDEO.

&&

JEO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 3:16 AM EDT	Heat Advisory	PHI	Burlington, Camden, Gloucester, Mercer	12 hr
Jul 6, 12:45 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	60 min
Jul 6, 12:52 PM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Mercer, Salem	8 hr
Jul 6, 12:57 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden	2 hr
Jul 6, 1:08 PM EDT	Flash Flood Warning	PHI	Burlington, Camden	4 hr
Jul 6, 1:15 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Monmouth	60 min
Jul 6, 1:43 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	62 min
Jul 6, 1:52 PM EDT	Special Weather Statement	PHI	Ocean	23 min
Jul 6, 2:00 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	75 min
Jul 6, 2:02 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Mercer, Middlesex, Monmouth, Ocean	118 min
Jul 6, 2:39 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	66 min
Jul 6, 2:41 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer	49 min
Jul 6, 2:46 PM EDT	Special Marine Warning	PHI		89 min
Jul 6, 2:48 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	4 hr
Jul 6, 2:51 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	39 min
Jul 6, 2:57 PM EDT	Flash Flood Warning EmergencyCatastrophic damage threat	PHI	Burlington, Camden, Gloucester	4 hr
Jul 6, 3:00 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	45 min
Jul 6, 3:14 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	46 min
Jul 6, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Somerset	42 min
Jul 6, 3:34 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth, Somerset	116 min
Jul 6, 3:36 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	54 min
Jul 6, 3:36 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset	39 min
Jul 6, 3:38 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	52 min
Jul 6, 3:44 PM EDT	Special Marine Warning	PHI		61 min
Jul 6, 3:44 PM EDT	Special Marine Warning	PHI		61 min
Jul 6, 3:47 PM EDT	Flash Flood Warning	PHI	Middlesex, Morris, Somerset	4 hr
Jul 6, 3:47 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	58 min
Jul 6, 4:41 PM EDT	Special Marine Warning	PHI		64 min
Jul 6, 4:45 PM EDT	Special Marine Warning	PHI		41 min
Jul 6, 4:45 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Salem	60 min
Jul 6, 4:58 PM EDT	Special Marine Warning	PHI		62 min
Jul 6, 5:24 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	4 hr
Jul 6, 5:39 PM EDT	Special Marine Warning	PHI		66 min
Jul 6, 5:43 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	47 min
Jul 6, 5:57 PM EDT	Special Marine Warning	PHI		63 min
Jul 6, 6:00 PM EDT	Severe Thunderstorm Warning	PHI	Salem	60 min
Jul 6, 6:43 PM EDT	Special Marine Warning	PHI		44 min
Jul 6, 6:56 PM EDT	Special Marine Warning	PHI		47 min
Jul 6, 7:18 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	36 min
Jul 6, 7:55 PM EDT	Special Weather Statement	PHI	Sussex	50 min
Jul 6, 12:34 PM EDT	Special Weather Statement	PHI	Philadelphia	26 min
Jul 6, 1:20 PM EDT	Special Weather Statement	PHI	Montgomery	25 min
Jul 6, 1:24 PM EDT	Special Weather Statement	PHI	Monroe	36 min
Jul 6, 1:44 PM EDT	Special Weather Statement	PHI	Montgomery	31 min
Jul 6, 1:50 PM EDT	Areal Flood Advisory	PHI	Berks, Chester, Montgomery	4 hr
Jul 6, 1:50 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	40 min
Jul 6, 2:04 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	41 min
Jul 6, 2:10 PM EDT	Areal Flood Advisory	PHI	Monroe	2 hr
Jul 6, 2:18 PM EDT	Special Weather Statement	PHI	Montgomery	27 min
Jul 6, 2:27 PM EDT	Severe Thunderstorm Warning	PHI	Montgomery	48 min
Jul 6, 2:28 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	28 min
Jul 6, 2:39 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Montgomery	4 hr
Jul 6, 2:51 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	24 min
Jul 6, 3:11 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	49 min
Jul 6, 3:52 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	38 min
Jul 6, 3:56 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	64 min
Jul 6, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh	24 min
Jul 6, 4:07 PM EDT	Flash Flood Warning	PHI	Chester, Delaware, Montgomery	4 hr
Jul 6, 4:31 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Monroe, Northampton	44 min
Jul 6, 4:51 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	114 min
Jul 6, 5:00 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	45 min
Jul 6, 5:01 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	119 min
Jul 6, 5:14 PM EDT	Severe Thunderstorm Warning	PHI	Chester	61 min
Jul 6, 5:17 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	43 min
Jul 6, 5:20 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	42 min
Jul 6, 5:29 PM EDT	Severe Thunderstorm Warning	PHI	Chester	46 min
Jul 6, 5:43 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	3 hr
Jul 6, 5:53 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery	52 min
Jul 6, 6:13 PM EDT	Severe Thunderstorm Warning	PHI	Chester	48 min
Jul 6, 6:14 PM EDT	Areal Flood Advisory	PHI	Berks, Chester, Montgomery	3 hr
Jul 6, 6:18 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	35 min
Jul 6, 6:54 PM EDT	Flash Flood Warning	PHI	Berks, Chester, Montgomery	109 min
Jul 6, 7:36 PM EDT	Severe Thunderstorm Warning	PHI	Chester	69 min
Jul 6, 6:37 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	53 min
Jul 6, 7:41 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle, Sussex	64 min

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.