Alert archive / Delaware / Special Weather Statements in 2019

Special Weather Statement, NWS Philadelphia/Mount Holly

April 19, 2019Kent County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 19, 2019, 10:13 PM EDT for Kent County, Delaware. It was in force for 32 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 19, 2019, 10:13 PM EDT (02:13 UTC)
Expired: Apr 19, 2019, 10:45 PM EDT
In force: 32 min
Issued by: NWS Philadelphia/Mount Holly

County Kent County, DE

The radar

The Dover AFB radar (KDOX), 17 km from the middle of the area, began a volume at 02:12 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, 2.2 hours before the alert went out and 116 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: 106 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 669 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 358 m²/s²
0-3 km storm-relative helicity: 377 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

827 
WWUS81 KPHI 200213
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
1013 PM EDT FRI APR 19 2019

DEZ001>003-200245-
Inland Sussex-Kent-New Castle-
1013 PM EDT FRI APR 19 2019

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN SUSSEX...SOUTH
CENTRAL NEW CASTLE AND KENT COUNTIES...

At 1013 PM EDT, a strong thunderstorm was located near Andrewsville,
or 15 miles northwest of Georgetown, moving northeast at 60 mph.

Winds up to 50 mph are possible with this storm.

Locations impacted include...
Dover, Smyrna, Milford, Seaford, Harrington, Camden, Clayton,
Bridgeville, Cheswold, Bowers, Woodside, Viola, Hartly, Rising
Sun-Lebanon, Hazlettville, Dover Base Housing, Dover Speedway,
Sandtown, Andrewsville and Green Spring.

LAT...LON 3869 7572 3912 7575 3937 7564 3922 7540
      3907 7541 3901 7533 3894 7531 3892 7531
      3862 7564
TIME...MOT...LOC 0213Z 212DEG 53KT 3881 7564 

$$

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 10:11 PM EDT	Special Marine Warning	PHI		64 min
Apr 19, 10:44 PM EDT	Special Weather Statement	PHI	Cape May	31 min
Apr 19, 11:09 PM EDT	Special Marine Warning	PHI		51 min
Apr 19, 11:12 PM EDT	Coastal Flood Statement	PHI	Ocean	43 hr
Apr 19, 11:24 PM EDT	Special Marine Warning	PHI		51 min
Apr 19, 11:33 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May	27 min
Apr 19, 11:57 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May, Ocean	33 min
Apr 19, 11:59 PM EDT	Special Marine Warning	PHI		61 min
Apr 20, 12:32 AM EDT	Special Weather Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	58 min
Apr 20, 12:34 AM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May, Cumberland	2 hr
Apr 20, 12:36 AM EDT	Special Marine Warning	PHI		54 min
Apr 20, 12:56 AM EDT	Special Marine Warning	PHI		64 min
Apr 20, 1:27 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Middlesex, Monmouth, Ocean	74 min
Apr 20, 4:22 AM EDT	Special Marine Warning	PHI		53 min
Apr 20, 5:26 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Mercer, Monmouth, Salem	4 hr
Apr 20, 6:30 AM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May	4 hr
Apr 20, 8:56 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Monmouth, Ocean	4 hr
Apr 20, 4:01 PM EDT	Coastal Flood Advisory	PHI	Burlington, Camden, Gloucester, Mercer	13 hr
Apr 20, 10:38 AM EDT	Areal Flood Warning	PHI	Montgomery	6 hr
Apr 20, 10:54 AM EDT	River Flood Warning	PHI	Chester	5 hr
Apr 19, 9:38 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	37 min
Apr 19, 9:53 PM EDT	Special Weather Statement	PHI	Sussex	37 min
Apr 19, 11:04 PM EDT	Special Weather Statement	PHI	Sussex	26 min
Apr 19, 11:35 PM EDT	Areal Flood Advisory	PHI	Sussex	2 hr
Apr 20, 1:16 AM EDT	Special Weather Statement	PHI	Kent, New Castle	29 min
Apr 20, 4:17 AM EDT	Special Weather Statement	PHI	Kent, Sussex	28 min
Apr 20, 6:28 AM EDT	Areal Flood Advisory	PHI	Kent, Sussex	4 hr
Apr 20, 4:30 AM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's, Talbot	30 min
Apr 20, 5:46 AM EDT	Areal Flood Advisory	PHI	Cecil, Kent, Queen Anne's, Talbot	4 hr

Nearby

Special Weather Statements in Delaware, 2019 Every special weather statement in 2019

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.