Alert archive / Maryland / Special Weather Statements in 2015

Special Weather Statement, NWS Philadelphia/Mount Holly

July 30, 2015Cumberland County, Salem County, New Jersey; Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 30, 2015, 4:07 PM EDT for Cumberland County, Salem County, New Jersey; Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Delaware. It was in force for 53 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 30, 2015, 4:07 PM EDT (20:07 UTC)
Expired: Jul 30, 2015, 5:00 PM EDT
In force: 53 min
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, Caroline County, MD, Queen Anne's County, MD, Talbot County, MD, Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 42 km from the middle of the area, began a volume at 20:09 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, 8.1 hours before the alert went out and 120 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: 4 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 1214 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 33 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.

316 
WWUS81 KPHI 302007
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
407 PM EDT THU JUL 30 2015
 
DEZ001>003-MDZ008-012-015-019-020-NJZ016-021-302100-
KENT-INLAND SUSSEX-NEW CASTLE-CECIL-CAROLINE-TALBOT-KENT-QUEEN
ANNE'S-SALEM-CUMBERLAND-
407 PM EDT THU JUL 30 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT EASTERN MARYLAND 
SOUTHERN NEW JERSEY AND NORTHERN DELAWARE...

AT 406 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM NEAR SAINT GEORGES TO NEAR CENTERVILLE TO PRINCE
FREDERICK...AND MOVING EAST AT 35 MPH.

WIND GUSTS UP TO 40 MPH ARE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
VINELAND...DOVER...MILLVILLE...BRIDGETON...MIDDLETOWN...EASTON...
CENTERVILLE...TALBOT...SMYRNA...SALEM...BUENA...DENTON...
CENTREVILLE...HARRINGTON...WOODSTOWN...ALLOWAY...CAMDEN...CLAYTON...
FEDERALSBURG AND QUINTON.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 3886 7626 3879 7620 3879 7619 3893 7620
      3955 7567 3967 7520 3951 7497 3924 7519
      3924 7541 3905 7539 3877 7572 3864 7571
      3871 7584 3860 7605 3873 7624 3876 7622
      3877 7632 3867 7634 3868 7634 3876 7638
TIME...MOT...LOC 2006Z 254DEG 31KT 3952 7564 3900 7607 3856 7657 
$$

PO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 2:26 PM EDT	Special Weather Statement	PHI	Sussex, Warren	79 min
Jul 30, 2:34 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Warren	116 min
Jul 30, 3:38 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Mercer, Salem	4 hr
Jul 30, 3:38 PM EDT	Special Weather Statement	PHI	Middlesex	52 min
Jul 30, 3:41 PM EDT	Special Marine Warning	PHI		2 hr
Jul 30, 3:48 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Gloucester, Mercer, Salem	57 min
Jul 30, 4:07 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Somerset	4 hr
Jul 30, 4:41 PM EDT	Special Marine Warning	PHI		2 hr
Jul 30, 4:51 PM EDT	Areal Flood Advisory	PHI	Burlington, Monmouth, Ocean	4 hr
Jul 30, 4:53 PM EDT	Special Weather Statement	PHI	Burlington, Monmouth, Ocean	97 min
Jul 30, 5:21 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester	4 hr
Jul 30, 5:41 PM EDT	Areal Flood Advisory	PHI	Burlington, Monmouth, Ocean	4 hr
Jul 30, 1:17 PM EDT	Areal Flood Advisory	PHI	Berks	118 min
Jul 30, 1:41 PM EDT	Special Weather Statement	PHI	Northampton	49 min
Jul 30, 2:02 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Montgomery, Northampton	2 hr
Jul 30, 2:43 PM EDT	Special Weather Statement	PHI	Delaware	77 min
Jul 30, 3:12 PM EDT	Areal Flood Advisory	PHI	Berks	3 hr
Jul 30, 3:03 PM EDT	Special Weather Statement	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	57 min

Nearby

Special Weather Statements in Maryland, 2015 Special Weather Statements in New Jersey, 2015 Special Weather Statements in Delaware, 2015 Every special weather statement 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.