Alert archive / Delaware / Special Weather Statements in 2017

Special Weather Statement, NWS Philadelphia/Mount Holly

July 14, 2017Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 14, 2017, 5:24 PM EDT for Sussex County, Delaware. It was in force for 36 min. 2 reports 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: Jul 14, 2017, 5:24 PM EDT (21:24 UTC)
Expired: Jul 14, 2017, 6:00 PM EDT
In force: 36 min
Issued by: NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 11 km from the middle of the area, began a volume at 21:23 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
Jul 14, 5:45 PM EDT	MARINE TSTM WIND 49	Green Hill, DE
Jul 14, 5:45 PM EDT	MARINE TSTM WIND 49	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, 9.4 hours before the alert went out and 103 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: 908 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 959 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

018 
WWUS81 KPHI 142124
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
524 PM EDT FRI JUL 14 2017

DEZ002>004-142200-
Inland Sussex-Kent-Delaware Beaches-
524 PM EDT FRI JUL 14 2017

...AN OUTFLOW BOUNDARY WILL AFFECT NORTHERN SUSSEX AND SOUTHEASTERN 
KENT COUNTIES...

At 524 PM EDT, radar indicated an outflow boundary was located along 
a line extending from 6 miles west of North Cape May to 8 miles 
southeast of Big Stone Beach to near Harrington. Movement was south 
at 25 mph.

Winds up to 40 mph are possible with this outflow boundary.

Locations impacted include...
Georgetown, Milford, Seaford, Harrington, Lewes, Milton, Bridgeville,
Ellendale, Cape Henlopen State Park, Big Stone Beach, Felton,
Greenwood, Frederica, Houston, Farmington and Riverview.

LAT...LON 3864 7560 3902 7559 3903 7535 3898 7531
      3895 7532 3894 7531 3893 7532 3880 7518
      3878 7513 3880 7509 3874 7508
TIME...MOT...LOC 2124Z 341DEG 24KT 3896 7507 3891 7521 3889 7553 

$$

Robertson

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 8:17 PM EDT	Special Weather Statement	PHI	Camden	43 min
Jul 13, 8:26 PM EDT	Special Weather Statement	PHI	Cape May	34 min
Jul 13, 8:27 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	4 hr
Jul 13, 8:49 PM EDT	Special Weather Statement	PHI	Cumberland	26 min
Jul 13, 8:51 PM EDT	Special Weather Statement	PHI	Atlantic	54 min
Jul 13, 9:07 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	53 min
Jul 13, 9:46 PM EDT	Special Weather Statement	PHI	Atlantic	14 min
Jul 13, 9:50 PM EDT	Special Marine Warning	PHI		115 min
Jul 13, 9:57 PM EDT	Special Weather Statement	PHI	Cape May	33 min
Jul 13, 10:42 PM EDT	Special Marine Warning	PHI		93 min
Jul 14, 7:21 AM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	3 hr
Jul 14, 11:40 AM EDT	Flash Flood Watch	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	11 hr
Jul 14, 2:57 PM EDT	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	3 hr
Jul 14, 3:07 PM EDT	Special Marine Warning	PHI		53 min
Jul 14, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	12 min
Jul 14, 3:23 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	67 min
Jul 14, 3:25 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Cumberland, Gloucester, Ocean, Salem	4 hr
Jul 14, 3:34 PM EDT	Flash Flood Warning	PHI	Gloucester, Salem	3 hr
Jul 14, 3:35 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Gloucester	55 min
Jul 14, 3:43 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Salem	47 min
Jul 14, 3:47 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Ocean	3 hr
Jul 14, 3:54 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	66 min
Jul 14, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May	63 min
Jul 14, 4:13 PM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	3 hr
Jul 14, 4:18 PM EDT	Special Marine Warning	PHI		57 min
Jul 14, 4:25 PM EDT	Special Marine Warning	PHI		95 min
Jul 14, 4:44 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	61 min
Jul 14, 4:54 PM EDT	Special Marine Warning	PHI		66 min
Jul 14, 5:47 PM EDT	Special Weather Statement	PHI	Cape May	13 min
Jul 14, 5:53 PM EDT	Special Marine Warning	PHI		52 min
Jul 14, 6:32 PM EDT	Special Marine Warning	PHI		88 min
Jul 14, 7:08 PM EDT	Special Marine Warning	PHI		97 min
Jul 14, 7:28 PM EDT	Areal Flood Advisory	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	3 hr
Jul 14, 12:30 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Montgomery, Northampton	4 hr
Jul 14, 1:58 PM EDT	Special Weather Statement	PHI	Chester	62 min
Jul 14, 2:14 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware, Montgomery, Philadelphia	3 hr
Jul 14, 2:31 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	59 min
Jul 14, 2:53 PM EDT	Flash Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	3 hr
Jul 13, 10:03 PM EDT	Special Weather Statement	PHI	Caroline	27 min
Jul 13, 10:15 PM EDT	Areal Flood Advisory	PHI	Caroline, Talbot	4 hr
Jul 14, 9:23 AM EDT	Special Weather Statement	PHI	Cecil	37 min
Jul 14, 12:06 PM EDT	Heat Advisory	PHI	Caroline, Kent, Queen Anne's, Talbot	7 hr
Jul 14, 2:46 PM EDT	Areal Flood Advisory	PHI	Cecil	3 hr
Jul 14, 3:10 PM EDT	Flash Flood Warning	PHI	Cecil	2 hr
Jul 14, 3:52 PM EDT	Flash Flood Warning	PHI	Talbot	53 min
Jul 14, 3:57 PM EDT	Flash Flood Warning	PHI	Cecil, Kent	2 hr
Jul 14, 4:00 PM EDT	Special Weather Statement	PHI	Caroline	45 min
Jul 14, 4:05 PM EDT	Special Weather Statement	PHI	Kent	40 min
Jul 14, 4:48 PM EDT	Special Weather Statement	PHI	Queen Anne's	27 min
Jul 14, 4:59 PM EDT	Flash Flood Warning	PHI	Queen Anne's	4 hr
Jul 14, 5:27 PM EDT	Special Weather Statement	PHI	Queen Anne's	63 min
Jul 14, 5:40 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	65 min
Jul 14, 5:54 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	51 min
Jul 14, 5:58 PM EDT	Flash Flood Warning	PHI	Talbot	3 hr
Jul 14, 6:10 PM EDT	Flash Flood Warning	PHI	Caroline	3 hr
Jul 14, 6:20 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	40 min
Jul 13, 8:09 PM EDT	Special Weather Statement	PHI	Kent	36 min
Jul 13, 8:29 PM EDT	Special Weather Statement	PHI	Kent	31 min
Jul 13, 10:39 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	51 min
Jul 14, 9:02 AM EDT	Special Weather Statement	PHI	New Castle	28 min
Jul 14, 5:14 PM EDT	Areal Flood Advisory	PHI	Kent	3 hr
Jul 14, 5:30 PM EDT	River Flood Warning	PHI	New Castle	7 hr
Jul 14, 5:51 PM EDT	Special Weather Statement	PHI	Sussex	39 min
Jul 14, 6:32 PM EDT	Areal Flood Advisory	PHI	Sussex	4 hr
Jul 14, 6:48 PM EDT	Special Weather Statement	PHI	Sussex	42 min
Jul 14, 7:15 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	60 min

Nearby

Special Weather Statements in Delaware, 2017 Every special weather statement in 2017

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.