Alert archive / Delaware / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

July 8, 2011Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 8, 2011, 7:46 PM EDT for Sussex County, Delaware. It was in force for 59 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, 7:46 PM EDT (23:46 UTC)
Expired: Jul 8, 2011, 8:45 PM EDT
In force: 59 min
Issued by: NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 23 km from the middle of the area, began a volume at 23:46 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 12:00Z, 11.8 hours before the alert went out and 95 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: 489 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 890 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

048 
WWUS81 KPHI 082346
SPSPHI

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

DEZ003-004-090045-
DELAWARE BEACHES DE-INLAND SUSSEX DE-
746 PM EDT FRI JUL 8 2011

...A STRONG THUNDERSTORM WILL AFFECT SUSSEX COUNTY...

AT 742 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 6 MILES NORTHEAST OF GEORGETOWN...MOVING EAST AT
15 MPH. THE THUNDERSTORM WILL BE NEAR LEWES AROUND 815 PM...REHOBOTH
BEACH AND CAPE HENLOPEN STATE PARK AROUND 830 PM.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM.

LAT...LON 3864 7534 3890 7533 3890 7526 3886 7523
      3880 7516 3879 7511 3881 7509 3880 7507
      3864 7505 3863 7510

$$

FORECASTER: NIERENBERG

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, 4:17 PM EDT	Special Weather Statement	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	88 min
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, 7:49 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	56 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.