Alert archive / Delaware / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

June 11, 2011Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 11, 2011, 5:53 AM EDT for Kent County, Sussex County, Delaware. It was in force for 67 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, 5:53 AM EDT (09:53 UTC)
Expired: Jun 11, 2011, 7:00 AM EDT
In force: 67 min
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, Sussex County, DE

The radar

The Dover AFB radar (KDOX), 19 km from the middle of the area, began a volume at 09:56 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 9.9 hours before the alert went out and 105 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: 386 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 1192 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

900 
WWUS81 KPHI 110953
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
553 AM EDT SAT JUN 11 2011

DEZ002>004-NJZ024-111100-
ATLANTIC COASTAL CAPE MAY NJ-DELAWARE BEACHES DE-INLAND SUSSEX DE-
KENT DE-
553 AM EDT SAT JUN 11 2011

...A STRONG THUNDERSTORM WILL AFFECT CAPE MAY...KENT AND SUSSEX
COUNTIES...

AT 551 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES NORTHWEST OF GEORGETOWN...MOVING
NORTHEAST AT 15 MPH. THE THUNDERSTORM WILL BE NEAR FARMINGTON...
ANDREWSVILLE AROUND 600 AM...ELLENDALE...MILTON AROUND 615 AM...
MILFORD...HOUSTON AROUND 630 AM...SLAUGHTER BEACH...FREDERICA AROUND
645 AM...BIG STONE BEACH AND CAPE HENLOPEN STATE PARK AROUND 700 AM.

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

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM.

LAT...LON 3871 7572 3883 7573 3926 7544 3924 7539
      3909 7540 3898 7529 3893 7530 3880 7516
      3879 7511 3891 7498 3899 7497 3899 7490
      3895 7485 3891 7497 3881 7508 3865 7505
      3860 7514 3860 7511 3848 7522

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 11:15 PM EDT	Special Weather Statement	PHI	Morris	60 min
Jun 11, 12:07 AM EDT	Special Weather Statement	PHI	Morris	53 min
Jun 11, 12:41 AM EDT	Areal Flood Advisory	PHI	Morris, Sussex	3 hr
Jun 11, 1:40 AM EDT	Special Weather Statement	PHI	Union	65 min
Jun 11, 4:23 AM EDT	Special Weather Statement	PHI	Hunterdon, Warren	67 min
Jun 11, 3:11 PM EDT	Special Weather Statement	PHI	Gloucester	49 min
Jun 11, 3:47 PM EDT	Areal Flood Advisory	PHI	Camden, Gloucester	93 min
Jun 11, 3:58 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Gloucester	47 min
Jun 11, 4:32 PM EDT	Areal Flood Advisory	PHI	Atlantic	85 min
Jun 11, 4:43 PM EDT	Special Weather Statement	PHI	Atlantic	47 min
Jun 11, 5:01 PM EDT	Special Marine Warning	PHI		44 min
Jun 11, 5:24 PM EDT	Special Weather Statement	PHI	Atlantic	51 min
Jun 11, 1:48 AM EDT	Special Weather Statement	PHI	Carbon	57 min
Jun 11, 2:32 AM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh	58 min
Jun 11, 3:26 AM EDT	Special Weather Statement	PHI	Berks, Lehigh, Northampton	64 min
Jun 11, 3:45 AM EDT	Areal Flood Advisory	PHI	Berks, Lehigh	3 hr
Jun 11, 3:48 AM EDT	Special Weather Statement	PHI	Berks	57 min
Jun 11, 5:21 AM EDT	Special Weather Statement	PHI	Berks	54 min
Jun 11, 6:17 AM EDT	Special Weather Statement	PHI	Berks, Chester	58 min
Jun 11, 6:42 AM EDT	Special Weather Statement	PHI	Carbon, Monroe	63 min
Jun 11, 1:46 PM EDT	Special Weather Statement	PHI	Caroline	44 min
Jun 11, 6:34 AM EDT	Special Weather Statement	PHI	Sussex	56 min
Jun 11, 6:52 AM EDT	Areal Flood Advisory	PHI	Sussex	113 min
Jun 11, 2:43 PM EDT	Special Weather Statement	PHI	Sussex	47 min
Jun 11, 3:05 PM EDT	Special Weather Statement	PHI	Sussex	55 min
Jun 11, 4:09 PM EDT	Special Weather Statement	PHI	Sussex	66 min
Jun 11, 4:21 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	39 min
Jun 11, 4:57 PM EDT	Special Weather Statement	PHI	Kent	48 min
Jun 11, 5:05 PM EDT	Areal Flood Advisory	PHI	Kent	63 min

Nearby

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.