Alert archive / Delaware / Tornado Warnings in 2020

Tornado Warning 34, NWS Philadelphia/Mount Holly

November 30, 2020Kent County, Delaware

NWS Philadelphia/Mount Holly issued this tornado warning at Nov 30, 2020, 3:21 PM EST for Kent County, Delaware. It was in force for 24 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: Nov 30, 2020, 3:21 PM EST (20:21 UTC)
Expired: Nov 30, 2020, 3:45 PM EST
In force: 24 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

County Kent County, DE

The radar

The Dover AFB radar (KDOX), 46 km from the middle of the area, began a volume at 20:24 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
Nov 30, 3:22 PM EST	TSTM WND DMG	Marydel, DE	TREES DOWN, INCLUDING ONE ON A VEHICLE.
Nov 30, 3:30 PM EST	TSTM WND DMG	2 S Kenton, DE	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2 S KENTON. SEVERAL TREES DOWN ACROSS THE NORTHERN PARTS OF KENT COUNTY. TIME ESTIMATED FROM RADAR.

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
Nov 30, 1:07 PM EST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.4 hours before the alert went out and 142 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: 2 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 524 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 326 m²/s²
0-3 km storm-relative helicity: 630 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

039 
WFUS51 KPHI 302021
TORPHI
DEC001-302045-
/O.NEW.KPHI.TO.W.0034.201130T2021Z-201130T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
321 PM EST Mon Nov 30 2020

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  Northwestern Kent County in central Delaware...

* Until 345 PM EST.
    
* At 320 PM EST, a tornado producing storm was located near
  Goldsboro, or 14 miles west of Dover, moving northeast at 40 mph.

  HAZARD...Damaging tornado.

  SOURCE...Radar confirmed tornado.

  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.

* Locations impacted include...
  Dover, Cheswold, Hartly, Dover Speedway, Kenton and Marydel. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

To repeat, a tornado has been confirmed. 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 3929 7566 3917 7552 3909 7574 3910 7575
      3920 7576
TIME...MOT...LOC 2020Z 230DEG 34KT 3911 7579 

TORNADO...OBSERVED
HAIL...<.75IN

$$

Iovino

1 follow-up statement

883 
WWUS51 KPHI 302041
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
341 PM EST Mon Nov 30 2020

DEC001-302051-
/O.EXP.KPHI.TO.W.0034.000000T0000Z-201130T2045Z/
Kent DE-
341 PM EST Mon Nov 30 2020

...THE TORNADO WARNING FOR NORTHWESTERN KENT COUNTY WILL EXPIRE AT
345 PM EST...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A Tornado Watch remains in effect until 700 PM EST for central
Delaware...and eastern and northeastern Maryland.

LAT...LON 3929 7566 3917 7552 3909 7574 3910 7575
      3920 7576
TIME...MOT...LOC 2041Z 230DEG 34KT 3923 7560 

$$

Iovino

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 30, 11:35 AM EST	River Flood Warning	PHI	New Castle	11 hr
Nov 30, 12:15 PM EST	Areal Flood Advisory	PHI	New Castle	3 hr
Nov 30, 2:01 PM EST	Coastal Flood Statement	PHI	Sussex	3 hr
Nov 30, 2:41 PM EST	Severe Thunderstorm Warning	PHI	New Castle	49 min
Nov 30, 2:48 PM EST	Areal Flood Warning	PHI	New Castle	8 hr
Nov 30, 3:01 PM EST	Severe Thunderstorm Warning	PHI	New Castle	44 min
Nov 30, 3:04 PM EST	Severe Thunderstorm Warning	PHI	Kent, New Castle	56 min
Nov 30, 3:47 PM EST	Tornado Warning	PHI	Kent	28 min
Nov 30, 5:24 PM EST	River Flood Warning	PHI	New Castle	5 hr
Nov 30, 5:39 PM EST	River Flood Warning	PHI	New Castle	4 hr

Nearby

Tornado Warnings in Delaware, 2020 Every tornado warning in 2020 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.