Alert archive / Maryland / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

June 11, 2011Cecil County, Maryland; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 11, 2011, 10:52 PM EDT for Cecil County, Maryland; New Castle County, Delaware. It was in force for 68 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 11, 2011, 10:52 PM EDT (02:52 UTC)
Expired: Jun 12, 2011, 12:00 AM EDT
In force: 68 min
Issued by: NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Cecil County, MD

The radar

The Dover AFB radar (KDOX), 91 km from the middle of the area, began a volume at 02:54 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 2.9 hours before the alert went out and 145 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 0 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 72 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.

153 
WWUS81 KPHI 120252
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1052 PM EDT SAT JUN 11 2011

DEZ001-MDZ008-012-NJZ016-PAZ067-120400-
CECIL MD-CHESTER PA-KENT MD-NEW CASTLE DE-SALEM NJ-
1052 PM EDT SAT JUN 11 2011

...STRONG THUNDERSTORMS WILL AFFECT CECIL...CHESTER...KENT...NEW
CASTLE AND SALEM COUNTIES...

AT 1052 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 15 MILES NORTHWEST
OF NEWARK TO 11 MILES WEST OF ELKTON TO 20 MILES NORTHEAST OF
BALTIMORE...MOVING EAST AT 15 MPH. THE THUNDERSTORMS WILL BE NEAR
COCHRANVILLE...ZION AROUND 1100 PM...WEST GROVE...PLEASANT HILL
AROUND 1115 PM...LADENBERG...AVONDALE AROUND 1130 PM...NORTH STAR...
CAYOTS AROUND 1145 PM...BOHEMIAS MILLS AND CECILTON AROUND MIDNIGHT.

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 TO 40 MPH ARE POSSIBLE WITH THESE STORMS.

EXPECT INTENSE LIGHTNING FROM THESE STORMS. DO NOT SEEK SHELTER UNDER
TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM
APPROACHES.

LAT...LON 3938 7611 3938 7607 3944 7600 3946 7602
      3953 7599 3954 7607 3960 7613 3977 7610
      3987 7601 3992 7601 3978 7553 3965 7556
      3962 7560 3959 7559 3963 7556 3945 7561
      3926 7597 3933 7618

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 11:48 PM EDT	Special Weather Statement	PHI	Gloucester, Salem	57 min
Jun 12, 12:11 AM EDT	Special Weather Statement	PHI	Middlesex	64 min
Jun 12, 2:26 AM EDT	Special Weather Statement	PHI	Middlesex, Monmouth	64 min
Jun 11, 8:19 PM EDT	Areal Flood Advisory	PHI	Berks	3 hr
Jun 11, 9:06 PM EDT	Special Weather Statement	PHI	Chester	54 min
Jun 11, 9:22 PM EDT	Areal Flood Advisory	PHI	Chester	3 hr
Jun 12, 12:39 AM EDT	Special Weather Statement	PHI	Chester	66 min
Jun 12, 4:32 PM EDT	Special Weather Statement	PHI	Monroe	43 min
Jun 12, 5:18 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	57 min
Jun 12, 5:19 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	56 min
Jun 12, 6:14 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	61 min
Jun 11, 9:59 PM EDT	Areal Flood Advisory	PHI	Cecil	3 hr
Jun 11, 10:29 PM EDT	Special Weather Statement	PHI	Cecil	61 min
Jun 12, 3:35 PM EDT	Special Weather Statement	PHI	Cecil	55 min
Jun 12, 3:51 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	54 min
Jun 12, 4:55 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	65 min
Jun 12, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent, Queen Anne's	52 min
Jun 12, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	65 min
Jun 12, 6:50 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	55 min
Jun 11, 11:23 PM EDT	Areal Flood Advisory	PHI	New Castle	116 min
Jun 12, 6:09 PM EDT	Special Weather Statement	PHI	Kent	66 min
Jun 12, 7:43 PM EDT	Special Weather Statement	PHI	Sussex	62 min

Nearby

Special Weather Statements in Maryland, 2011 Special Weather Statements in Delaware, 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.