Alert archive / Maryland / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

July 7, 2011Cecil County, Kent County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 7, 2011, 5:46 PM EDT for Cecil County, Kent County, Maryland. It was in force for 89 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 7, 2011, 5:46 PM EDT (21:46 UTC)
Expired: Jul 7, 2011, 7:15 PM EDT
In force: 89 min
Issued by: NWS Philadelphia/Mount Holly

Counties Cecil County, MD, Kent County, MD

The radar

The Dover AFB radar (KDOX), 84 km from the middle of the area, began a volume at 21:49 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, 9.8 hours before the alert went out and 8 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: 549 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1227 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 30 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.

433 
WWUS81 KPHI 072146
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
546 PM EDT THU JUL 7 2011

MDZ008-012-015-072315-
CECIL MD-KENT MD-QUEEN ANNE'S MD-
546 PM EDT THU JUL 7 2011

...STRONG THUNDERSTORMS WILL AFFECT CECIL...KENT AND QUEEN ANNE'S
COUNTIES...

AT 544 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 19 MILES WEST OF
ELKTON TO 11 MILES SOUTHEAST OF BALTIMORE...MOVING EAST AT 10 MPH.
THE THUNDERSTORMS WILL BE NEAR RICHARDSMERE AROUND 600 PM...WEST
NOTTINGHAM...RISING SUN AROUND 615 PM...FARMINGTON...ROCK HALL AROUND
630 PM...CALVERT...LOMBARD AROUND 645 PM...BLAKE AND PLEASANT HILL
AROUND 700 PM.

VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

WIND GUSTS UP TO 40 TO 50 MPH ARE POSSIBLE WITH THESE STORMS.

IF YOU SEE THREATENING WEATHER, PLEASE MOVE INDOORS QUICKLY.

LAT...LON 3927 7622 3934 7617 3938 7611 3938 7607
      3945 7600 3946 7602 3951 7599 3953 7600
      3954 7607 3956 7610 3970 7622 3973 7579
      3931 7576 3912 7583 3910 7624 3916 7628

$$
 
TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 1:27 PM EDT	Special Weather Statement	PHI	Burlington	93 min
Jul 7, 3:11 PM EDT	Special Weather Statement	PHI	Atlantic	64 min
Jul 7, 3:15 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	45 min
Jul 7, 3:16 PM EDT	Special Marine Warning	PHI		89 min
Jul 7, 3:26 PM EDT	Severe Thunderstorm Warning	PHI	Warren	64 min
Jul 7, 3:45 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex	90 min
Jul 7, 3:46 PM EDT	Special Weather Statement	PHI	Burlington	89 min
Jul 7, 3:58 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	34 min
Jul 7, 4:17 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	88 min
Jul 7, 4:19 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	46 min
Jul 7, 4:48 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	57 min
Jul 7, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	63 min
Jul 7, 5:44 PM EDT	Special Weather Statement	PHI	Burlington, Monmouth, Ocean	61 min
Jul 7, 6:10 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	40 min
Jul 7, 6:46 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Somerset	74 min
Jul 7, 6:48 PM EDT	Special Weather Statement	PHI	Camden	57 min
Jul 7, 7:32 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Cape May, Cumberland, Salem	88 min
Jul 7, 7:49 PM EDT	Special Weather Statement	PHI	Mercer	86 min
Jul 7, 2:27 PM EDT	Special Weather Statement	PHI	Philadelphia	93 min
Jul 7, 3:05 PM EDT	Special Weather Statement	PHI	Lehigh	55 min
Jul 7, 3:07 PM EDT	Special Weather Statement	PHI	Monroe	53 min
Jul 7, 4:35 PM EDT	Severe Thunderstorm Warning	PHI	Chester	55 min

Nearby

Special Weather Statements in Maryland, 2011 Every special weather statement in 2011

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.