Alert archive / Delaware / Special Weather Statements in 2013

Special Weather Statement, NWS Philadelphia/Mount Holly

October 7, 2013Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 7, 2013, 3:21 PM EDT for Sussex County, Delaware. It was in force for 39 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Oct 7, 2013, 3:21 PM EDT (19:21 UTC)
Expired: Oct 7, 2013, 4:00 PM EDT
In force: 39 min
Issued by: NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 22 km from the middle of the area, began a volume at 19:22 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.

What was reported inside it

Time	Report	Where	Remark
Oct 7, 3:29 PM EDT	MARINE TSTM WIND 39	Lewes, DE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.4 hours before the alert went out and 89 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: 171 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 742 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 81 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.

626 
WWUS81 KPHI 071921
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
321 PM EDT MON OCT 7 2013

DEZ003-004-072000-
DELAWARE BEACHES DE-INLAND SUSSEX DE-
321 PM EDT MON OCT 7 2013

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT EASTERN SUSSEX
COUNTY...

AT 317 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
SLAUGHTER BEACH TO PARSONSBURG...MOVING EAST AT 35 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS. 

VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADS AND FILL POOR DRAINAGE AREAS. THE RAIN CAN CAUSE RAPID
RISES ON SMALL STREAMS AND CREEKS. 

THESE STORMS WILL BE NEAR MILLSBORO AROUND 330 PM...SELBYVILLE AROUND
340 PM...SOUTH BETHANY AROUND 350 PM AND FENWICK ISLAND AROUND 400
PM.

A TORNADO WATCH CONTINUES IN EFFECT UNTIL 500 PM. 


LAT...LON 3845 7557 3895 7538 3895 7531 3893 7532
      3881 7518 3879 7515 3879 7511 3881 7510
      3880 7508 3860 7504 3859 7505 3845 7504

$$

SZATKOWSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 7, 1:30 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Sussex, Warren	60 min
Oct 7, 1:37 PM EDT	Special Weather Statement	PHI	Salem	53 min
Oct 7, 1:59 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	46 min
Oct 7, 2:24 PM EDT	Special Weather Statement	PHI	Morris, Somerset	51 min
Oct 7, 2:33 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex	42 min
Oct 7, 3:02 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex	43 min
Oct 7, 3:49 PM EDT	Special Marine Warning	PHI		56 min
Oct 7, 4:05 PM EDT	Special Weather Statement	PHI	Monmouth, Ocean	40 min
Oct 7, 11:31 AM EDT	Special Weather Statement	PHI	Berks, Chester	59 min
Oct 7, 11:50 AM EDT	Severe Thunderstorm Warning	PHI	Berks	40 min
Oct 7, 12:12 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	63 min
Oct 7, 12:41 PM EDT	Special Weather Statement	PHI	Chester	64 min
Oct 7, 12:49 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	41 min
Oct 7, 1:05 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	25 min
Oct 7, 1:33 PM EDT	Special Weather Statement	PHI	Bucks, Montgomery	42 min
Oct 7, 2:18 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	57 min

Nearby

Special Weather Statements in Delaware, 2013 Every special weather statement in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.