Alert archive / Maryland / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

August 5, 2012Cecil County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 5, 2012, 4:40 PM EDT for Cecil County, Maryland. It was in force for 95 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: Aug 5, 2012, 4:40 PM EDT (20:40 UTC)
Expired: Aug 5, 2012, 6:15 PM EDT
In force: 95 min
Issued by: NWS Philadelphia/Mount Holly

County Cecil County, MD

The radar

The Dover AFB radar (KDOX), 101 km from the middle of the area, began a volume at 20:40 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 12:00Z, 8.7 hours before the alert went out and 138 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: 809 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1048 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 57 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.

323 
WWUS81 KPHI 052040
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
440 PM EDT SUN AUG 5 2012

MDZ008-052215-
CECIL MD-
440 PM EDT SUN AUG 5 2012

...STRONG THUNDERSTORMS WILL AFFECT CECIL COUNTY...

AT 436 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 24 MILES SOUTHWEST
OF LANCASTER TO 15 MILES NORTH OF BALTIMORE TO 10 MILES NORTHWEST OF
BALTIMORE...MOVING EAST AT 40 MPH. THE THUNDERSTORMS WILL BE NEAR
ROCK SPRINGS...RICHARDSMERE AROUND 515 PM...WEST NOTTINGHAM...LOMBARD
AROUND 530 PM...ZION...PLEASANT HILL AROUND 545 PM...CHERRY HILL AND
ANDORA AROUND 600 PM.

VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL POOR DRAINAGE AREAS.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.

LAT...LON 3972 7580 3953 7595 3952 7599 3954 7603
      3954 7606 3954 7607 3956 7609 3958 7608
      3963 7616 3965 7616 3972 7623

$$

FORECASTER: HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 3:49 AM EDT	Flash Flood Watch	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	16 hr
Aug 5, 1:00 PM EDT	Special Weather Statement	PHI	Warren	30 min
Aug 5, 1:20 PM EDT	Special Weather Statement	PHI	Sussex	85 min
Aug 5, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	77 min
Aug 5, 5:22 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Hunterdon, Salem, Warren	68 min
Aug 5, 5:38 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	82 min
Aug 5, 5:52 PM EDT	Special Marine Warning	PHI		83 min
Aug 5, 6:16 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 3 more	74 min
Aug 5, 6:21 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	39 min
Aug 5, 7:09 PM EDT	Special Weather Statement	PHI	Atlantic, Cumberland	66 min
Aug 5, 7:30 PM EDT	Special Weather Statement	PHI	Atlantic, Cumberland, Monmouth, Ocean	60 min
Aug 5, 7:38 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Ocean	67 min
Aug 5, 7:40 PM EDT	Special Marine Warning	PHI		95 min
Aug 5, 12:15 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	45 min
Aug 5, 12:29 PM EDT	Special Weather Statement	PHI	Northampton	31 min
Aug 5, 1:03 PM EDT	Special Weather Statement	PHI	Monroe	27 min
Aug 5, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	78 min
Aug 5, 4:23 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	67 min
Aug 5, 4:54 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	51 min
Aug 5, 5:10 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	80 min
Aug 5, 7:52 PM EDT	Special Weather Statement	PHI	Queen Anne's	68 min

Nearby

Special Weather Statements in Maryland, 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.