Alert archive / New Jersey / Special Marine Warnings in 2015

Special Marine Warning 21, NWS Philadelphia/Mount Holly

June 23, 2015

NWS Philadelphia/Mount Holly issued this special marine warning at Jun 23, 2015, 7:44 PM EDT. It was in force for 91 min. 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 23, 2015, 7:44 PM EDT (23:44 UTC)
Expired: Jun 23, 2015, 9:15 PM EDT
In force: 91 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

The radar

The Dover AFB radar (KDOX), 46 km from the middle of the area, began a volume at 23:47 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 12:00Z, 11.7 hours before the alert went out and 86 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: 844 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 1420 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

664 
WHUS51 KPHI 232344
SMWPHI
ANZ431-454-455-475-240115-
/O.NEW.KPHI.MA.W.0021.150623T2344Z-150624T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
744 PM EDT TUE JUN 23 2015

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SPECIAL MARINE WARNING FOR...
  COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM...
  COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM...
  DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE...
  WATERS FROM CAPE MAY NJ TO FENWICK ISLAND DE OUT 20 TO 40 NM...

* UNTIL 915 PM EDT

* AT 743 PM EDT...DOPPLER RADAR INDICATED A LINE OF STRONG
  THUNDERSTORMS...CAPABLE OF PRODUCING WINDS 34 KNOTS OR GREATER...
  LOCATED ALONG A LINE EXTENDING FROM NEAR SLAUGHTER BEACH TO 45 NM
  WEST OF BOWERS BEACH...MOVING SOUTHEAST AT 25 KNOTS.

* LOCATIONS IMPACTED INCLUDE...
  CAPE MAY POINT...BUOY 2MS...OVERFALLS SHOAL...INDIAN RIVER INLET
  BRIDGE...BROWN SHOAL LIGHT...CAPE HENLOPEN...DELAWARE LIGHTSHIP
  BUOY 44009...BUOY 4FB...FIVE FATHOMS BUOY...BETHANY BEACH...
  REHOBOTH BEACH AND FENWICK ISLAND.

* GIVE YOURSELF ENOUGH TIME TO SEEK SHELTER BEFORE THIS LINE OF 
  STORMS ARRIVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF CAUGHT ON THE
OPEN WATER STAY BELOW DECK IF POSSIBLE...KEEP AWAY FROM UNGROUNDED
METAL OBJECTS.

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT FOR
SOUTHERN DELAWARE...SOUTHERN NEW JERSEY AND THE ADJACENT COASTAL
WATERS.

LAT...LON 3846 7505 3861 7506 3856 7509 3859 7512
      3858 7527 3859 7529 3862 7510 3867 7518
      3865 7513 3869 7515 3872 7507 3880 7509
      3880 7525 3883 7521 3892 7530 3894 7497
      3870 7416 3851 7426 3822 7431 3823 7433
TIME...MOT...LOC 2343Z 337DEG 24KT 3891 7526 3877 7629 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 9:10 AM EDT	Special Weather Statement	PHI	Sussex	35 min
Jun 23, 11:13 AM EDT	Special Weather Statement	PHI	Warren	32 min
Jun 23, 2:29 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	46 min
Jun 23, 5:38 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	52 min
Jun 23, 5:44 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	4 hr
Jun 23, 5:58 PM EDT	Tornado Warning	PHI	Burlington, Camden, Gloucester	20 min
Jun 23, 6:02 PM EDT	Special Weather Statement	PHI	Morris, Sussex, Warren	43 min
Jun 23, 6:13 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	77 min
Jun 23, 6:14 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	4 hr
Jun 23, 6:18 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	4 hr
Jun 23, 6:24 PM EDT	Special Marine Warning	PHI		2 hr
Jun 23, 6:41 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	4 hr
Jun 23, 7:58 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland	47 min
Jun 23, 8:30 AM EDT	Special Weather Statement	PHI	Monroe	60 min
Jun 23, 10:37 AM EDT	Special Weather Statement	PHI	Carbon, Monroe	38 min
Jun 23, 1:31 PM EDT	Special Weather Statement	PHI	Carbon, Monroe, Northampton	59 min
Jun 23, 1:41 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	49 min
Jun 23, 3:49 PM EDT	Special Weather Statement	PHI	Berks, Bucks, Chester, Montgomery	86 min
Jun 23, 4:11 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	24 min
Jun 23, 4:44 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	61 min
Jun 23, 5:05 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware, Montgomery	40 min
Jun 23, 5:19 PM EDT	Areal Flood Advisory	PHI	Berks, Chester, Montgomery	4 hr
Jun 23, 5:22 PM EDT	Tornado Warning	PHI	Chester	23 min
Jun 23, 5:28 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	47 min
Jun 23, 6:44 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	76 min
Jun 23, 6:48 PM EDT	Areal Flood Advisory	PHI	Caroline, Kent, Queen Anne's, Talbot	4 hr
Jun 23, 7:06 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	84 min
Jun 23, 7:41 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	65 min

Nearby

Special Marine Warnings in New Jersey, 2015 Every special marine warning in 2015

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.