Alert archive / New Jersey / Special Marine Warnings in 2018

Special Marine Warning 30, NWS Philadelphia/Mount Holly

May 12, 2018

NWS Philadelphia/Mount Holly issued this special marine warning at May 12, 2018, 9:37 PM EDT. It was in force for 83 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 12, 2018, 9:37 PM EDT (01:37 UTC)
Expired: May 12, 2018, 11:00 PM EDT
In force: 83 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 40.0 mph

What forecasters said that day

The local office's own words before this special marine warning 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 special marine warning went out at May 12, 9:37 PM EDT, 0 minutes earlier.

Area forecast discussion, May 12, 9:37 PM EDT, 0 minutes before

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Hazardous weather outlook, May 12, 8:37 PM EDT, 1 hour before

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
837 PM EDT Sat May 12 2018

NJZ001-007>010-012>015-PAZ054-055-060>062-070-071-101>106-140045-
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Western Monmouth-
Eastern Monmouth-Mercer-Carbon-Monroe-Berks-Lehigh-Northampton-
Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
837 PM EDT Sat May 12 2018

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

.DAY ONE...Tonight.

The threat for severe thunderstorms and tornadoes has diminished at
this point as storms have moved off to the south and east. However
additional showers with a few embedded storms will be possible
through this evening and could cause local urban and small stream
flooding, especially for areas that have already received heavy
rainfall.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

There will be several rounds of showers and thunderstorms from
Sunday through Friday. Heavy rainfall totals may occur by the end of
the week, with the threat of at least localized flooding increasing
with time.

.SPOTTER INFORMATION STATEMENT...

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

DEZ001>004-MDZ008-012-015-019-020-NJZ016>027-140045-
New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD-
Queen Annes-Talbot-Caroline-Salem-Gloucester-Camden-
Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean-
Southeastern Burlington-
837 PM EDT Sat May 12 2018

...TORNADO WATCH 85 IN EFFECT UNTIL 1 AM EDT SUNDAY...

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

.DAY ONE...Tonight.

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

   Tornado Watch.

Thunderstorms are moving across the area this evening. These storms
will have the potential to produce damaging winds, large hail, and
heavy rainfall which could lead to isolated flash flooding and more
widespread urban and poor drainage flooding. An isolated tornado is
also possible, especially near the Mason-Dixon line. The threat of
severe storms should diminish through the late evening.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

There will be several rounds of showers and thunderstorms from
Sunday through Friday. Heavy rainfall totals may occur by the end of
the week, with the threat of at least localized flooding increasing
with time.

.SPOTTER INFORMATION STATEMENT...

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

ANZ430-431-451>455-140045-
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 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-
837 PM EDT Sat May 12 2018

...TORNADO WATCH 85 IN EFFECT UNTIL 1 AM EDT SUNDAY...

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

.DAY ONE...Tonight.

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

   Tornado Watch.

Thunderstorms are expected to move across the waters this evening.
Some of these storms may produce strong winds, frequent cloud-to-
ground lightning and locally higher seas, which may pose a hazard to
mariners.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

ANZ450-140045-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
837 PM EDT Sat May 12 2018

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...Tonight.

Thunderstorms are expected to develop late this afternoon and move
across the waters this evening. Some of these storms may produce
strong winds, frequent cloud-to-ground lightning and locally higher
seas, which may pose a hazard to mariners.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

In the hours before

Special weather statement, May 12, 8:26 PM EDT, 1 hour 11 minutes before

Special Weather Statement
National Weather Service Mount Holly NJ
826 PM EDT SAT MAY 12 2018

NJZ017>027-130115-
Coastal Atlantic-Northwestern Burlington-Cumberland-Camden-Coastal
Ocean-Ocean-Atlantic-Atlantic Coastal Cape May-Cape May-Southeastern
Burlington-Gloucester-
826 PM EDT SAT MAY 12 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT ATLANTIC...
CUMBERLAND...SOUTHEASTERN OCEAN...SOUTHEASTERN CAMDEN...SOUTHEASTERN
GLOUCESTER...CAPE MAY AND SOUTHEASTERN BURLINGTON COUNTIES...

At 825 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Tabernacle to near Mizpah to near
Fortesque. Movement was southeast at 45 mph.

Winds up to 40 mph and half inch hail are possible with these storms.

Locations impacted include...
Vineland, Atlantic City, Millville, Ocean City, Cape May, Cumberland,
Barnegat, Pleasantville, Hammonton, Somers Point, Ventnor City,
Brigantine, Northfield, Absecon, Tabernacle, Shamong, Margate City,
Buena, Egg Harbor City and North Wildwood.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A tornado watch remains in effect until 100 AM EDT for southern New
Jersey.

LAT...LON 3951 7428 3955 7426 3950 7429 3954 7440
      3956 7441 3939 7438 3930 7454 3933 7468
      3929 7455 3894 7486 3893 7497 3917 7490
      3918 7515 3931 7531 3956 7495 3994 7464
      3975 7411
TIME...MOT...LOC 0025Z 301DEG 43KT 3985 7462 3952 7486 3926 7522

Local storm report, May 12, 8:35 PM EDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
835 PM EDT SAT MAY 12 2018

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

0835 PM     HAIL             CHESTERTOWN             39.22N  76.07W
05/12/2018  M1.75 INCH       KENT               MD   TRAINED SPOTTER

&&

EVENT NUMBER PHI1800689

CMS

Local storm report, May 12, 8:38 PM EDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
838 PM EDT SAT MAY 12 2018

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

0836 PM     TSTM WND DMG     1 SE CENTREVILLE        39.03N  76.05W
05/12/2018                   QUEEN ANNE'S       MD   TRAINED SPOTTER

            NUMEROUS BRANCHES AND GUTTERS DOWN FROM SEVERAL HOUSES.

&&

EVENT NUMBER PHI1800690

DAVIS

Local storm report, May 12, 9:00 PM EDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
900 PM EDT SAT MAY 12 2018

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

0845 PM     TSTM WND GST     KENT NARROWS            38.97N  76.24W
05/12/2018  M58 MPH          QUEEN ANNE'S       MD   MESONET

&&

EVENT NUMBER PHI1800691

CMS

Local storm report, May 12, 9:04 PM EDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
904 PM EDT SAT MAY 12 2018

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

0847 PM     HAIL             WYOMING                 39.12N  75.56W
05/12/2018  E1.25 INCH       KENT               DE   SOCIAL MEDIA

&&

EVENT NUMBER PHI1800692

DAVIS

Special weather statement, May 12, 9:07 PM EDT, 30 minutes before

Special Weather Statement
National Weather Service Mount Holly NJ
907 PM EDT SAT MAY 12 2018

NJZ020>027-130145-
Coastal Atlantic-Cumberland-Coastal Ocean-Ocean-Atlantic-Atlantic
Coastal Cape May-Cape May-Southeastern Burlington-
907 PM EDT SAT MAY 12 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHERN ATLANTIC...
SOUTHERN CUMBERLAND...SOUTHEASTERN OCEAN...CAPE MAY AND SOUTHEASTERN
BURLINGTON COUNTIES...

At 906 PM EDT, radar indicated strong thunderstorms were located
along a line extending from Barnegat to near Mays Landing to near
Fortesque. Movement was southeast at 40 mph.

Winds up to 40 mph and half inch hail are possible with these storms.

Locations impacted include...
Toms River, Vineland, Atlantic City, Millville, Ocean City,
Cumberland, Barnegat, Pleasantville, Somers Point, Brigantine,
Northfield, Absecon, Egg Harbor City, Laurel Lake, Tuckerton,
Woodbine, Sea Isle City, Estell Manor, Surf City and Port Republic.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

A tornado watch remains in effect until 100 AM EDT for southern New
Jersey.

LAT...LON 3974 7419 3976 7410 3955 7426 3954 7440
      3956 7441 3941 7440 3949 7431 3942 7434
      3933 7468 3929 7455 3893 7497 3917 7490
      3930 7530 3952 7472 4002 7406
TIME...MOT...LOC 0106Z 314DEG 37KT 3976 7423 3948 7466 3926 7522

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 8:00 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	3 hr
May 12, 8:26 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Cape May, Cumberland	49 min
May 12, 8:37 PM EDT	Special Marine Warning	PHI		53 min
May 12, 9:07 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May, Cumberland, Ocean	38 min
May 12, 9:16 PM EDT	Special Marine Warning	PHI		29 min
May 12, 9:34 PM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May, Cumberland	117 min
May 12, 8:11 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	49 min
May 12, 8:50 PM EDT	Flash Flood Warning	PHI	Kent, New Castle	3 hr
May 12, 8:51 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	39 min
May 12, 9:14 PM EDT	Areal Flood Advisory	PHI	Kent	2 hr
May 12, 9:27 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	63 min
May 12, 10:28 PM EDT	Areal Flood Advisory	PHI	Sussex	65 min

Nearby

Special Marine Warnings in New Jersey, 2018 Every special marine warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.