Alert archive / New Jersey / Special Marine Warnings in 2010

Special Marine Warning 21, NWS Philadelphia/Mount Holly

June 22, 2010

NWS Philadelphia/Mount Holly issued this special marine warning at Jun 22, 2010, 7:12 PM EDT. It was in force for 48 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 22, 2010, 7:12 PM EDT (23:12 UTC)
Expired: Jun 22, 2010, 8:00 PM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

The radar

The Dover AFB radar (KDOX), 57 km from the middle of the area, began a volume at 23:15 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.2 hours before the alert went out and 68 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: 20 J/kg
Mixed-layer CIN: -177 J/kg
Mixed-layer LCL: 1411 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

108 
WHUS51 KPHI 222312
SMWPHI
ANZ430-431-230000-
/O.NEW.KPHI.MA.W.0021.100622T2312Z-100623T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
712 PM EDT TUE JUN 22 2010

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SPECIAL MARINE WARNING FOR...
  THE DELAWARE BAY...


  INCLUDING CROSS LEDGE LIGHT...EAST POINT...FORTESQUE BEACH...MIAH
  MAULL LIGHT AND SHIP JOHN SHOAL LIGHT...

* UNTIL 800 PM EDT

* AT 708 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM...PRODUCING STRONG WINDS 34 KNOTS OR GREATER 11 NM
  NORTHWEST OF SHIP JOHN SHOAL LIGHT...OR ABOUT OVER STONY POINT...
  MOVING SOUTHEAST AT 25 KNOTS.

* THIS STRONG THUNDERSTORM WILL BE NEAR
  4 NM NORTHEAST OF SHIP JOHN SHOAL LIGHT BY 735 PM EDT
  OVER FORTESQUE BEACH AND 6 NM NORTHEAST OF CROSS LEDGE LIGHT BY 755
  PM EDT
  5 NM WEST OF EAST POINT AND 7 NM NORTHEAST OF MIAH MAULL LIGHT BY
  800 PM EDT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THUNDERSTORMS CAN PRODUCE SUDDEN WATERSPOUTS. WATERSPOUTS CAN EASILY
OVERTURN BOATS AND CREATE LOCALLY HAZARDOUS SEAS. SEEK SAFE HARBOR
IMMEDIATELY.

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

&&

LAT...LON 3953 7553 3946 7553 3945 7549 3935 7537
      3935 7533 3930 7531 3930 7526 3927 7522
      3925 7517 3918 7514 3921 7511 3921 7503
      3919 7501 3907 7516 3940 7555 3942 7555
      3947 7560
TIME...MOT...LOC 2311Z 314DEG 25KT 3946 7545

$$

DRAG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 4:38 AM EDT	Excessive Heat Warning	PHI	Burlington, Camden, Gloucester, Mercer	60 hr
Jun 22, 5:41 PM EDT	Severe Thunderstorm Warning	PHI	Salem	49 min
Jun 22, 6:29 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	46 min
Jun 22, 6:31 PM EDT	Special Marine Warning	PHI		44 min
Jun 22, 6:50 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Gloucester, Mercer, Middlesex, Somerset	55 min
Jun 22, 7:15 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	45 min
Jun 22, 3:37 PM EDT	Special Weather Statement	PHI	Carbon	38 min
Jun 22, 4:15 PM EDT	Special Weather Statement	PHI	Berks	60 min
Jun 22, 4:23 PM EDT	Special Weather Statement	PHI	Berks	67 min
Jun 22, 4:38 PM EDT	Special Weather Statement	PHI	Chester	52 min
Jun 22, 4:56 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	34 min
Jun 22, 5:00 PM EDT	Special Weather Statement	PHI	Berks, Carbon, Chester, Lehigh, Monroe, Montgomery and 1 more	60 min
Jun 22, 5:15 PM EDT	Special Weather Statement	PHI	Berks, Chester, Delaware, Montgomery	60 min
Jun 22, 5:29 PM EDT	Special Weather Statement	PHI	Berks, Chester, Delaware, Montgomery	46 min
Jun 22, 7:27 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent	48 min
Jun 22, 7:48 PM EDT	Special Weather Statement	PHI	Kent	42 min

Nearby

Special Marine Warnings in New Jersey, 2010 Every special marine warning in 2010

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.