Alert archive / Delaware / Tornado Warnings in 2021

Tornado Warning 4, NWS Philadelphia/Mount Holly

July 8, 2021Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this tornado warning at Jul 8, 2021, 11:37 PM EDT for Sussex County, Delaware. It was in force for 23 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: Jul 8, 2021, 11:37 PM EDT (03:37 UTC)
Expired: Jul 9, 2021, 12:00 AM EDT
In force: 23 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 31 km from the middle of the area, began a volume at 03:41 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, 3.6 hours before the alert went out and 80 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: 440 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 675 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 336 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

As transmitted.

194 
WFUS51 KPHI 090337
TORPHI
DEC005-090400-
/O.NEW.KPHI.TO.W.0004.210709T0337Z-210709T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
1137 PM EDT Thu Jul 8 2021

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  Southeastern Sussex County in southern Delaware...

* Until midnight EDT.
    
* At 1136 PM EDT, a severe thunderstorm capable of producing a
  tornado was located over Millville, or 13 miles north of Ocean
  City, moving northwest at 40 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.

* Locations impacted include...
  Georgetown, Milton, Millville, Long Neck and Ocean View. 

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 3853 7507 3849 7517 3869 7538 3877 7532
      3877 7515
TIME...MOT...LOC 0336Z 153DEG 35KT 3855 7514 

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

$$

BAH

2 follow-up statements

819 
WWUS51 KPHI 090344
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1144 PM EDT Thu Jul 8 2021

DEC005-090400-
/O.CON.KPHI.TO.W.0004.000000T0000Z-210709T0400Z/
Sussex DE-
1144 PM EDT Thu Jul 8 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT FOR
SOUTHEASTERN SUSSEX COUNTY...
    
At 1143 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Dagsboro, or 13 miles southeast of Georgetown,
moving northwest at 35 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.

Locations impacted include...
Georgetown, Lewes, Milton and Long Neck. 

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3869 7538 3877 7532 3877 7515 3874 7513
      3858 7509 3852 7520
TIME...MOT...LOC 0343Z 149DEG 29KT 3859 7518 

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

$$

Deal

632 
WWUS51 KPHI 090350
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1150 PM EDT Thu Jul 8 2021

DEC005-090400-
/O.CON.KPHI.TO.W.0004.000000T0000Z-210709T0400Z/
Sussex DE-
1150 PM EDT Thu Jul 8 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT FOR EAST
CENTRAL SUSSEX COUNTY...
    
At 1150 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Millsboro, or 10 miles southeast of Georgetown,
moving northwest at 35 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.

Locations impacted include...
Georgetown, Milton and Long Neck. 

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3869 7538 3877 7532 3877 7523 3872 7518
      3863 7513 3857 7526
TIME...MOT...LOC 0350Z 149DEG 29KT 3863 7521 

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

$$

Deal

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 10:19 PM EDT	Areal Flood Advisory	PHI	Kent, Sussex	5 hr
Jul 8, 11:59 PM EDT	Tornado Warning	PHI	Sussex	12 min
Jul 9, 12:04 AM EDT	Tornado Warning	PHI	Sussex	26 min
Jul 9, 12:11 AM EDT	Tornado Warning	PHI	Sussex	35 min
Jul 9, 12:28 AM EDT	Tornado Warning	PHI	Sussex	17 min
Jul 9, 4:54 PM EDT	Special Weather Statement	PHI	New Castle	66 min
Jul 9, 5:17 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	43 min
Jul 9, 6:19 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	41 min
Jul 9, 6:50 PM EDT	Areal Flood Advisory	PHI	New Castle	2 hr
Jul 9, 6:57 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	63 min

Nearby

Tornado Warnings in Delaware, 2021 Every tornado warning in 2021 Tornadoes in 2021

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.