Alert archive / Delaware / Special Weather Statements in 2018

Special Weather Statement, NWS Philadelphia/Mount Holly

June 10, 2018Sussex County, Delaware; Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 10, 2018, 8:13 PM EDT for Sussex County, Delaware; Talbot County, Maryland. It was in force for 47 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 10, 2018, 8:13 PM EDT (00:13 UTC)
Expired: Jun 10, 2018, 9:00 PM EDT
In force: 47 min
Issued by: NWS Philadelphia/Mount Holly

Counties Sussex County, DE, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 46 km from the middle of the area, began a volume at 00:15 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, 0.2 hours before the alert went out and 92 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: 153 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 569 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

332 
WWUS81 KPHI 110013
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
813 PM EDT SUN JUN 10 2018

DEZ002-003-MDZ019-020-110100-
Inland Sussex-Kent-Talbot-Caroline-
813 PM EDT SUN JUN 10 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SUSSEX...SOUTHWESTERN
KENT...SOUTHEASTERN TALBOT AND SOUTHERN CAROLINE COUNTIES...

At 804 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 8 miles south of Tilghman Island to 11
miles southeast of Taylors Island to 11 miles west of Deal Island.
Movement was northeast at 35 mph.

These storms contain torrential downpours with rainfall of around 
one inch in less than 30 minutes being reported. A Flash Flood 
Warning may be needed this evening if these storms continue to 
maintain its intensity or start to slow as they approach an area 
that has already been affected by heavy rain since yesterday 
afternoon.

These storms will be near...
  Oxford around 820 PM EDT.
  Easton, Trappe and Hambleton around 830 PM EDT.
  Windyhill around 835 PM EDT.
  Tanyard and Choptank around 840 PM EDT.
  Preston and Matthews around 845 PM EDT.
  Harmony around 850 PM EDT.
  Delmar and Agner around 855 PM EDT.
  Seaford, Denton, Laurel, Smithville and Sycamore around 900 PM 
  EDT.

Other locations impacted by these storms include Bethel, Frankford,
Farmington, Blades and Greenwood.

Winds up to 40 mph are possible with these storms.

Cloud to ground lightning is also occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

Do not drive your vehicle through flooded roadways. 

LAT...LON 3846 7569 3864 7571 3869 7577 3868 7580
      3871 7584 3868 7593 3860 7599 3857 7604
      3863 7608 3864 7615 3868 7617 3869 7619
      3867 7620 3868 7621 3871 7622 3884 7608
      3891 7546 3845 7517
TIME...MOT...LOC 0004Z 244DEG 30KT 3862 7632 3837 7613 3813 7616 

$$

JRK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 10:38 PM EDT	Areal Flood Warning	PHI	Burlington, Camden	20 hr
Jun 10, 11:33 PM EDT	Flash Flood Warning	PHI	Burlington, Camden	5 hr
Jun 11, 12:03 AM EDT	Areal Flood Warning	PHI	Ocean	7 hr
Jun 11, 12:53 AM EDT	Flash Flood Warning	PHI	Burlington, Ocean	4 hr
Jun 11, 1:16 AM EDT	Areal Flood Advisory	PHI	Camden, Gloucester, Salem	8 hr
Jun 11, 2:15 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	7 hr
Jun 11, 3:16 AM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	8 hr
Jun 11, 3:54 AM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May, Cumberland, Gloucester	7 hr
Jun 11, 8:28 AM EDT	River Flood Warning	PHI	Burlington	58 hr
Jun 10, 8:29 PM EDT	Areal Flood Advisory	PHI	Berks, Chester, Montgomery	115 min
Jun 10, 9:52 PM EDT	Areal Flood Warning	PHI	Berks, Chester, Montgomery	18 hr
Jun 11, 3:28 AM EDT	River Flood Warning	PHI	Chester	5 hr
Jun 10, 9:07 PM EDT	Areal Flood Advisory	PHI	Kent, Sussex	3 hr

Nearby

Special Weather Statements in Delaware, 2018 Special Weather Statements in Maryland, 2018 Every special weather statement in 2018

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.