Alert archive / Maryland / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

October 14, 2011Cecil County, Maryland; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 14, 2011, 11:21 AM EDT for Cecil County, Maryland; New Castle County, Delaware. It was in force for 54 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: Oct 14, 2011, 11:21 AM EDT (15:21 UTC)
Expired: Oct 14, 2011, 12:15 PM EDT
In force: 54 min
Issued by: NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Cecil County, MD

The radar

The Dover AFB radar (KDOX), 96 km from the middle of the area, began a volume at 15:24 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, 3.4 hours before the alert went out and 19 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: 262 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 748 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 63 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.

407 
WWUS81 KPHI 141521
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1121 AM EDT FRI OCT 14 2011

DEZ001-MDZ008-012-PAZ067-141615-
CECIL MD-CHESTER PA-KENT MD-NEW CASTLE DE-
1121 AM EDT FRI OCT 14 2011

...A BAND OF STRONG THUNDERSTORMS WILL AFFECT CECIL...CHESTER...KENT 
AND NEW CASTLE COUNTIES...

AT 1118 AM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A STRONG 
THUNDERSTORM 16 MILES SOUTHWEST OF ELKTON...MOVING NORTHEAST AT 30 
MPH. THE THUNDERSTORM WILL BE NEAR CECILTON...SASSAFRAS AROUND 1125 
AM...HOLLYWOOD BEACH...PERRYVILLE...PORT DEPOSIT...WARWICK AROUND 
1130 AM...CHARLESTOWN...CAYOTS...BOHEMIAS MILLS AND MIDDLETOWN 
AROUND 1135 AM. OTHER THUNDERSTORMS WERE FORMING NEARBY.

WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS. 
FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING WILL ALSO OCCUR WITH 
THESE STORMS.

LAT...LON 3976 7612 3987 7601 3996 7600 4005 7595
      3988 7560 3984 7559 3983 7551 3925 7581
      3927 7586 3924 7599 3924 7601 3938 7612
      3938 7607 3945 7600 3946 7602 3953 7599
      3954 7607 3961 7614

$$

/ET

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 14, 12:15 AM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more	13 hr
Oct 14, 3:26 AM EDT	Coastal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	19 hr
Oct 14, 4:01 AM EDT	Gale Watch	PHI		12 hr
Oct 14, 2:21 PM EDT	Special Weather Statement	PHI	Warren	54 min
Oct 14, 2:53 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Hunterdon, Mercer, Somerset	67 min
Oct 14, 3:12 PM EDT	Special Weather Statement	PHI	Sussex, Warren	63 min
Oct 14, 3:59 PM EDT	Gale Watch	PHI		12 hr
Oct 14, 3:59 PM EDT	Gale Warning	PHI		27 hr
Oct 14, 3:59 PM EDT	Special Weather Statement	PHI	Middlesex, Monmouth, Morris	61 min
Oct 14, 10:45 AM EDT	Special Weather Statement	PHI	Berks, Lehigh	60 min
Oct 14, 11:38 AM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh	52 min
Oct 14, 12:25 PM EDT	Special Weather Statement	PHI	Chester, Delaware, Montgomery	80 min
Oct 14, 12:51 PM EDT	Special Weather Statement	PHI	Lehigh	54 min
Oct 14, 1:22 PM EDT	Special Weather Statement	PHI	Carbon, Monroe, Northampton	53 min
Oct 14, 1:43 PM EDT	Special Weather Statement	PHI	Bucks, Delaware, Montgomery, Philadelphia	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.