Alert archive / Maryland / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

July 8, 20115 counties in Maryland; Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 8, 2011, 4:17 PM EDT for 5 counties in Maryland; Kent County, Sussex County, Delaware. It was in force for 88 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 8, 2011, 4:17 PM EDT (20:17 UTC)
Expired: Jul 8, 2011, 5:45 PM EDT
In force: 88 min
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 42 km from the middle of the area, began a volume at 20:20 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, 8.3 hours before the alert went out and 60 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: 1352 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 668 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

996 
WWUS81 KPHI 082017
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
417 PM EDT FRI JUL 8 2011

DEZ001>004-MDZ008-012-015-019-020-082145-
CAROLINE MD-CECIL MD-DELAWARE BEACHES DE-INLAND SUSSEX DE-KENT MD-
KENT DE-NEW CASTLE DE-QUEEN ANNE'S MD-TALBOT MD-
417 PM EDT FRI JUL 8 2011

...STRONG THUNDERSTORMS WILL AFFECT CAROLINE...CECIL...KENT...NEW 
CASTLE...QUEEN ANNE'S...SUSSEX AND TALBOT COUNTIES...

AT 414 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
STRONG THUNDERSTORMS MOVING NORTHEAST AT 30 MPH. 

WIND GUSTS TO 50 MPH AND SMALL HAIL 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 3846 7570 3867 7576 3869 7590 3856 7605
      3871 7630 3887 7625 3882 7621 3883 7620
      3891 7631 3905 7630 3900 7618 3916 7628
      3951 7599 3972 7623 3972 7577 3920 7538
      3893 7530 3879 7508 3845 7504

$$

FORECASTER: MEOLA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 8:40 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	80 min
Jul 7, 8:42 PM EDT	Special Marine Warning	PHI		2 hr
Jul 7, 10:07 PM EDT	Special Weather Statement	PHI	Cape May	53 min
Jul 7, 10:55 PM EDT	Severe Thunderstorm Warning	PHI	Warren	28 min
Jul 8, 3:58 AM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	19 hr
Jul 8, 4:34 AM EDT	Special Weather Statement	PHI	Hunterdon	56 min
Jul 8, 12:03 PM EDT	Special Weather Statement	PHI	Atlantic	57 min
Jul 8, 12:56 PM EDT	Special Weather Statement	PHI	Atlantic, Camden, Gloucester	64 min
Jul 8, 2:12 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	93 min
Jul 8, 2:23 PM EDT	Special Weather Statement	PHI	Warren	82 min
Jul 8, 2:25 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	7 hr
Jul 8, 2:51 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Warren	54 min
Jul 8, 2:56 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer	3 hr
Jul 8, 3:03 PM EDT	Special Weather Statement	PHI	Mercer	57 min
Jul 8, 3:14 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	66 min
Jul 8, 3:33 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Somerset	3 hr
Jul 8, 3:44 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	76 min
Jul 8, 3:48 PM EDT	Flash Flood Warning	PHI	Camden	3 hr
Jul 8, 3:51 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	69 min
Jul 8, 4:10 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	3 hr
Jul 8, 4:42 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	78 min
Jul 8, 4:50 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden	70 min
Jul 8, 5:03 PM EDT	Flash Flood Warning	PHI	Sussex	117 min
Jul 8, 5:03 PM EDT	Tornado Warning	PHI	Atlantic, Burlington, Camden	27 min
Jul 8, 5:33 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 4 more	3 hr
Jul 8, 5:44 PM EDT	Flash Flood Warning	PHI	Camden, Gloucester, Salem	3 hr
Jul 8, 6:32 PM EDT	Special Marine Warning	PHI		58 min
Jul 8, 7:13 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	77 min
Jul 8, 7:24 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Monmouth, Ocean	3 hr
Jul 8, 7:26 PM EDT	Special Marine Warning	PHI		64 min
Jul 8, 7:50 PM EDT	Special Marine Warning	PHI		55 min
Jul 7, 8:56 PM EDT	Special Weather Statement	PHI	Carbon	94 min
Jul 7, 9:10 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	67 min
Jul 7, 9:47 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Northampton	73 min
Jul 8, 2:40 AM EDT	Special Weather Statement	PHI	Berks	65 min
Jul 8, 2:48 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	57 min
Jul 8, 3:35 PM EDT	Special Weather Statement	PHI	Montgomery	55 min
Jul 8, 3:40 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	3 hr
Jul 8, 3:45 PM EDT	Flash Flood Warning	PHI	Philadelphia	3 hr
Jul 8, 4:18 PM EDT	Flash Flood Warning	PHI	Monroe	2 hr
Jul 8, 4:29 PM EDT	Areal Flood Advisory	PHI	Chester	4 hr
Jul 8, 5:53 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	82 min
Jul 8, 6:23 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	82 min
Jul 8, 6:02 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle, Sussex	4 hr
Jul 8, 7:46 PM EDT	Special Weather Statement	PHI	Sussex	59 min
Jul 8, 7:49 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	56 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.