Alert archive / Delaware / Tornado Warnings in 2017

Tornado Warning 1, NWS Philadelphia/Mount Holly

June 19, 2017Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this tornado warning at Jun 19, 2017, 6:17 PM EDT for Kent County, Sussex County, Delaware. It was in force for 16 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: Jun 19, 2017, 6:17 PM EDT (22:17 UTC)
Expired: Jun 19, 2017, 6:33 PM EDT
In force: 16 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Kent County, DE, Sussex County, DE

The radar

The Dover AFB radar (KDOX), 4 km from the middle of the area, began a volume at 22:17 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
Jun 19, 6:17 PM EDT	TSTM WND DMG	Saint Johnstown, DE	TREES DOWN NEAR INTERSECTION OF ROUTE 16 AND ST JOHNSTOWN RD. PROBABLE TORNADO.
Jun 19, 6:27 PM EDT	TSTM WND DMG	1 Ene Pondside Acres, DE	DAMAGE TO MOBILE HOME ON AMEILA DR IN CEDAR CREEK ESTATES. PROBABLE TORNADO.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 19, 11:13 AM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.3 hours before the alert went out and 102 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: 419 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 1020 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

700 
WFUS51 KPHI 192217
TORPHI
DEC001-005-192245-
/O.NEW.KPHI.TO.W.0001.170619T2217Z-170619T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
617 PM EDT MON JUN 19 2017

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  Northern Sussex County in southern Delaware...
  Southeastern Kent County in central Delaware...

* Until 645 PM EDT
    
* At 617 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Bridgeville, or 11 miles northwest of Georgetown,
  moving northeast at 50 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Ellendale around 625 PM EDT. 
  Milford and Milton around 630 PM EDT. 

Other locations impacted by this tornadic thunderstorm include
Greenwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3882 7564 3900 7533 3892 7528 3882 7515
      3882 7517 3873 7558
TIME...MOT...LOC 2217Z 244DEG 43KT 3880 7556 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Meola

1 follow-up statement

793 
WWUS51 KPHI 192233
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
633 PM EDT MON JUN 19 2017

DEC001-005-192243-
/O.CAN.KPHI.TO.W.0001.000000T0000Z-170619T2245Z/
Sussex DE-Kent DE-
633 PM EDT MON JUN 19 2017

...THE TORNADO WARNING FOR NORTHERN SUSSEX AND SOUTHEASTERN KENT
COUNTIES IS CANCELLED...
    
The tornado threat has diminished and the Tornado Warning has been 
cancelled. However, damaging winds remain likely and a Severe 
Thunderstorm Warning remains in effect for the area.

A severe thunderstorm watch remains in effect until 800 PM EDT for
central and southern Delaware.

LAT...LON 3882 7564 3900 7533 3892 7528 3882 7515
      3882 7517 3873 7558
TIME...MOT...LOC 2232Z 244DEG 43KT 3889 7533 

$$

Meola

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 4:07 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	38 min
Jun 19, 4:07 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	38 min
Jun 19, 4:34 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	41 min
Jun 19, 4:38 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	52 min
Jun 19, 4:42 PM EDT	Areal Flood Advisory	PHI	New Castle	3 hr
Jun 19, 4:59 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	46 min
Jun 19, 5:14 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle, Sussex	3 hr
Jun 19, 5:28 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	62 min
Jun 19, 5:38 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	67 min
Jun 19, 6:52 PM EDT	Special Weather Statement	PHI	Sussex	23 min
Jun 19, 7:30 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	45 min
Jun 19, 7:34 PM EDT	Areal Flood Advisory	PHI	Sussex	3 hr

Nearby

Tornado Warnings in Delaware, 2017 Every tornado warning in 2017 Tornadoes 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.