Alert archive / New Jersey / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

July 20, 2012Cape May County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 20, 2012, 3:01 AM EDT for Cape May County, New Jersey. It was in force for 59 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: Jul 20, 2012, 3:01 AM EDT (07:01 UTC)
Expired: Jul 20, 2012, 4:00 AM EDT
In force: 59 min
Issued by: NWS Philadelphia/Mount Holly

County Cape May County, NJ

The radar

The Dover AFB radar (KDOX), 59 km from the middle of the area, began a volume at 07:04 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 00:00Z, 7.0 hours before the alert went out and 137 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: 1571 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1208 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

375 
WWUS81 KPHI 200701
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
301 AM EDT FRI JUL 20 2012

NJZ023-024-200800-
ATLANTIC COASTAL CAPE MAY NJ-CAPE MAY NJ-
301 AM EDT FRI JUL 20 2012

...A STRONG THUNDERSTORM WILL AFFECT CAPE MAY COUNTY...

AT 258 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
STRONG THUNDERSTORM OVER DELAWARE BAY...MOVING EAST AT 25 MPH. THE 
THUNDERSTORM WILL BE NEAR GREEN CREEK AND VILLAS AROUND 315 
AM...CAPE MAY COURT HOUSE AND SCOTCH BONNET AROUND 330 AM...AVALON 
AND SEA ISLE CITY AROUND 345 AM...AND STRATHMERE AND MARMORA AROUND 
400 AM.

VERY HEAVY RAIN WILL FALL FROM THIS STORM AND IT WILL CAUSE WATER TO 
POND ON ROADS AND QUICKLY FILL POOR DRAINAGE AREAS.

WIND GUSTS TO 45 MPH ARE POSSIBLE.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. DO 
NOT SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS. MOVE INDOORS 
WHEN A THUNDERSTORM APPROACHES.

LAT...LON 3894 7498 3899 7497 3909 7491 3915 7490
      3920 7493 3922 7492 3929 7462 3925 7459
      3913 7470 3910 7470 3899 7478 3893 7487
      3892 7497

$$

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 2:21 AM EDT	Special Marine Warning	PHI		84 min
Jul 20, 5:43 AM EDT	Special Weather Statement	PHI	Camden	92 min
Jul 20, 5:44 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	63 min
Jul 20, 7:28 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington	3 hr
Jul 20, 7:56 AM EDT	Areal Flood Advisory	PHI	Cape May	2 hr
Jul 20, 8:52 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Ocean	3 hr
Jul 20, 1:20 PM EDT	Special Weather Statement	PHI	Ocean	55 min
Jul 20, 3:16 PM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more	9 hr
Jul 19, 10:01 PM EDT	Special Weather Statement	PHI	Berks	59 min
Jul 20, 5:03 AM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Montgomery, Philadelphia	105 min
Jul 19, 10:58 PM EDT	Special Weather Statement	PHI	Kent, New Castle, Sussex	2 hr
Jul 20, 1:58 AM EDT	Special Weather Statement	PHI	Sussex	62 min
Jul 19, 9:07 PM EDT	Special Weather Statement	PHI	Queen Anne's	53 min

Nearby

Special Weather Statements in New Jersey, 2012 Every special weather statement in 2012

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.