Alert archive / Delaware / Special Weather Statements in 2020

Special Weather Statement, NWS Philadelphia/Mount Holly

April 30, 2020Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 30, 2020, 5:36 PM EDT for Kent County, Sussex County, Delaware. It was in force for 54 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: Apr 30, 2020, 5:36 PM EDT (21:36 UTC)
Expired: Apr 30, 2020, 6:30 PM EDT
In force: 54 min
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, Sussex County, DE

The radar

The Dover AFB radar (KDOX), 10 km from the middle of the area, began a volume at 21:40 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, 9.6 hours before the alert went out and 110 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: 36 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 917 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

131 
WWUS81 KPHI 302136
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
536 PM EDT Thu Apr 30 2020

DEZ001>004-302230-
Inland Sussex-Kent-New Castle-Delaware Beaches-
536 PM EDT Thu Apr 30 2020

...A LINE OF SHOWERS WILL AFFECT SUSSEX...SOUTHWESTERN NEW CASTLE AND
KENT COUNTIES...

At 534 PM EDT, radar indicated showers were located along a line
extending from near Delaney Corner to near Bridgeville to near
Gumboro. Movement was northeast at 20 mph.

Wind gusts up to 50 mph are possible with these showers.

Locations impacted include...
Dover, Georgetown, Smyrna, Milford, Millsboro, Harrington, Camden,
Clayton, Lewes, Milton, Selbyville, Bridgeville, Cheswold, Dagsboro,
Millville, Ellendale, Bowers, Woodside, Viola and Henlopen Acres.

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these showers, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 3845 7547 3878 7563 3930 7577 3940 7577
      3946 7553 3919 7535 3886 7522 3882 7508
      3845 7499
TIME...MOT...LOC 2134Z 247DEG 18KT 3924 7570 3880 7558 3850 7543 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 4:00 AM EDT	High Wind Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 3 more	16 hr
Apr 30, 4:16 AM EDT	Coastal Flood Advisory	PHI	Salem	22 hr
Apr 30, 10:20 AM EDT	Coastal Flood Statement	PHI	Ocean	25 hr
Apr 30, 10:20 AM EDT	Coastal Flood Advisory	PHI	Burlington, Camden, Gloucester	13 hr
Apr 30, 6:36 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May, Cumberland	54 min
Apr 30, 5:16 PM EDT	Areal Flood Advisory	PHI	Berks, Chester	4 hr
Apr 30, 3:20 PM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's, Talbot	40 min
Apr 30, 4:36 PM EDT	Special Weather Statement	PHI	Caroline	39 min

Nearby

Special Weather Statements in Delaware, 2020 Every special weather statement in 2020

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.