Alert archive / New Jersey / Tornado Warnings in 2020

Tornado Warning 1, NWS Philadelphia/Mount Holly

February 7, 20204 states

NWS Philadelphia/Mount Holly issued this tornado warning at Feb 7, 2020, 9:39 AM EST for 4 states. It was in force for 36 min. 21 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: Feb 7, 2020, 9:39 AM EST (14:39 UTC)
Expired: Feb 7, 2020, 10:15 AM EST
In force: 36 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties New Castle County, DE, Cecil County, MD, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 103 km from the middle of the area, began a volume at 14:41 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.

What was reported inside it

Time	Report	Where	Remark
Feb 7, 9:39 AM EST	TORNADO	1 Ssw Barksdale, MD	AN EF-1 TORNADO BRIEFLY TOUCHED DOWN NEAR THE ELK MILLS QUARRY IN CECIL COUNTY, MARYLAND. THE TORNADO UPROOTED AND SNAPPED NUMEROUS SOFTWOOD TREES JUST EAST AND NORTH OF THE QUARRY NEAR THE INTERSECTION OF ELK MILLS ROAD, APPLETON ROAD, AND FLETCHWOOD ROAD. A
Feb 7, 9:40 AM EST	TSTM WND DMG	Barksdale, MD	SEVERAL REPORTS OF DOWNED TREES. TIME ESTIMATED FROM RADAR.
Feb 7, 9:45 AM EST	TSTM WND DMG	1 Sw Marshallton, DE	MULTIPLE TREES DOWN ON TELEGRAPH RD. TIME ESTIMATED FROM RADAR.
Feb 7, 9:45 AM EST	TSTM WND DMG	Eastburn Heights, DE	PHOTO OF A TREE DOWN ONTO A DECK, DESTROYING PART OF A FENCE. TIME ESTIMATED FROM RADAR.
Feb 7, 9:46 AM EST	TSTM WND DMG	2 Wsw Eastburn Heights, DE	DOWNED TREE INTO A HOUSE ON BREWSTER DRIVE. TIME ESTIMATED FROM RADAR.
Feb 7, 9:50 AM EST	TSTM WND DMG	1 Ene Eastburn Heights, DE	DOWNED TREES ON CAR AND RESIDENCES IN MURRAY MANOR. TIME ESTIMATED FROM RADAR.
Feb 7, 9:50 AM EST	TSTM WND DMG	1 W Stanton, DE	SEVERAL REPORTS OF TREES AND WIRES DOWN NEAR TELEGRAPH ROAD, INCLUDING A TREE INTO A HOUSE. TIME ESTIMATED FROM RADAR.
Feb 7, 9:52 AM EST	TSTM WND DMG	Westfield, DE	TREE INTO A HOUSE ON REDWOOD AVENUE. TIME ESTIMATED FROM RADAR.
Feb 7, 9:54 AM EST	TSTM WND DMG	1 Ese Tybrook, DE	SEVERAL REPORTS OF DOWNED TREES AND WIRES. TIME ESTIMATED FROM RADAR.
Feb 7, 9:54 AM EST	TSTM WND DMG	1 Ne Birmingham Twp, PA	DOWNED POWER LINES FROM STRONG WINDS NEAR BRIDLEWOOD BOULEVARD. TIME ESTIMATED FROM RADAR.
Feb 7, 9:54 AM EST	TSTM WND DMG	Prices Corner, DE	DOWNED POWER LINES ON CENTERVILLE ROAD.
Feb 7, 10:00 AM EST	TSTM WND GST 59	Shellburne, DE
Feb 7, 10:02 AM EST	TSTM WND DMG	1 Ene Ashbourne Hills, DE	DOWNED TREE BLOCKING INTERSTATE 495 NEAR THE PENNSYLVANIA STATE LINE. TIME ESTIMATED FROM RADAR.
Feb 7, 10:02 AM EST	TSTM WND DMG	1 N Trainer, PA	TREE DOWN ON I-95. TIME ESTIMATED FROM RADAR.
Feb 7, 10:02 AM EST	TSTM WND DMG	Ashbourne Hills, DE	SEVERAL REPORTS OF DOWNED TREES IN THE AREA. TIME ESTIMATED FROM RADAR.
Feb 7, 10:06 AM EST	TSTM WND DMG	1 Nnw Aston Twp., PA	DOWNED TREES CLOSED PENNELL ROAD BETWEEN MOUNT ALVERSON AND GLENDALE. TIME ESTIMATED FROM RADAR.
Feb 7, 10:06 AM EST	TSTM WND DMG	1 W Chester Twp, PA	DOWNED TREE AND WIRES NEAR FORWOOD STREET. TIME ESTIMATED FROM RADAR.
Feb 7, 10:06 AM EST	TSTM WND DMG	Lower Chichester Twp., PA	DOWNED TREES AND WIRES BLOCKING WARD STREET. TIME ESTIMATED FROM RADAR.
Feb 7, 10:06 AM EST	TSTM WND DMG	Lower Chichester Twp., PA	ROOF BLOWN OFF A BUILDING. TIME ESTIMATED FROM RADAR.
Feb 7, 10:08 AM EST	TSTM WND DMG	1 Nnw Chester Twp, PA	DOWNED TREES AND WIRES NEAR INCINERATOR ROAD. TIME ESTIMATED FROM RADAR.
Feb 7, 10:12 AM EST	TSTM WND DMG	Harrison Twp, NJ	MPING REPORT.

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 2.7 hours before the alert went out and 181 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: 22 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 491 m above ground
0-6 km bulk shear: 134 kt
0-1 km storm-relative helicity: 488 m²/s²
0-3 km storm-relative helicity: 531 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

547 
WFUS51 KPHI 071439
TORPHI
DEC003-MDC015-NJC015-033-PAC029-045-071515-
/O.NEW.KPHI.TO.W.0001.200207T1439Z-200207T1515Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
939 AM EST Fri Feb 7 2020

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  Northern New Castle County in northern Delaware...
  Northeastern Cecil County in northeastern Maryland...
  Northwestern Salem County in southern New Jersey...
  Northwestern Gloucester County in southern New Jersey...
  Southeastern Chester County in southeastern Pennsylvania...
  Southwestern Delaware County in southeastern Pennsylvania...

* Until 1015 AM EST.
    
* At 939 AM EST, a severe thunderstorm capable of producing a tornado
  was located over Barksdale, or over Newark, 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.

* Locations impacted include...
  Wilmington, Newark, Elkton, Chester, Pennsville, Westtown, Carneys
  Point, Elsmere, New Castle, Penns Grove, Swedesboro, Newport,
  Arden, Stanton, Cheyney, Glasgow, Talleyville, Elam, Chelsea and
  Greenville.

This includes the following highways...
 Interstate 295 in New Jersey between mile markers 0 and 14.
 Interstate 95 in Pennsylvania between mile markers 0 and 4.
 Interstate 95 in Maryland between mile markers 105 and 109.
 New Jersey Turnpike near exit 2.
 Interstate 95 in Delaware between mile markers 0 and 23.

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 or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 3996 7553 3974 7520 3957 7582 3968 7589
TIME...MOT...LOC 1439Z 242DEG 42KT 3967 7579 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Staarmann

3 follow-up statements

866 
WWUS51 KPHI 071447
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
947 AM EST Fri Feb 7 2020

MDC015-071457-
/O.CAN.KPHI.TO.W.0001.000000T0000Z-200207T1515Z/
Cecil MD-
947 AM EST Fri Feb 7 2020

...THE TORNADO WARNING FOR NORTHEASTERN CECIL COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 3996 7553 3995 7552 3978 7526 3963 7568
      3975 7580
TIME...MOT...LOC 1447Z 241DEG 43KT 3972 7566 

$$

DEC003-NJC015-033-PAC029-045-071515-
/O.CON.KPHI.TO.W.0001.000000T0000Z-200207T1515Z/
New Castle DE-Salem NJ-Gloucester NJ-Chester PA-Delaware PA-
947 AM EST Fri Feb 7 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 AM EST FOR NORTHERN
NEW CASTLE...NORTHWESTERN SALEM...NORTHWESTERN GLOUCESTER...
SOUTHEASTERN CHESTER AND SOUTHWESTERN DELAWARE COUNTIES...
    
At 947 AM EST, a severe thunderstorm capable of producing a tornado
was located over Stanton, or near Newark, 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.

Locations impacted include...
Wilmington, Newark, Chester, Pennsville, Westtown, Carneys Point,
Elsmere, New Castle, Penns Grove, Newport, Arden, Stanton, Cheyney,
North Star, Talleyville, Wilmington Manor, Elam, Pike Creek, Chelsea
and Ashland.

This includes the following highways...
 Interstate 295 in New Jersey between mile markers 6 and 14.
 Interstate 95 in Pennsylvania between mile markers 0 and 4.
 Interstate 95 in Delaware between mile markers 5 and 23.

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 or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 3996 7553 3995 7552 3978 7526 3963 7568
      3975 7580
TIME...MOT...LOC 1447Z 241DEG 43KT 3972 7566 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Staarmann

971 
WWUS51 KPHI 071454
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
954 AM EST Fri Feb 7 2020

PAC029-071503-
/O.CAN.KPHI.TO.W.0001.000000T0000Z-200207T1515Z/
Chester PA-
954 AM EST Fri Feb 7 2020

...THE TORNADO WARNING FOR SOUTHEASTERN CHESTER COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 3984 7561 3984 7559 3986 7559 3990 7557
      3993 7554 3994 7552 3995 7552 3978 7526
      3965 7561 3965 7564 3977 7565
TIME...MOT...LOC 1453Z 242DEG 42KT 3976 7557 

$$

DEC003-NJC015-033-PAC045-071515-
/O.CON.KPHI.TO.W.0001.000000T0000Z-200207T1515Z/
New Castle DE-Salem NJ-Gloucester NJ-Delaware PA-
954 AM EST Fri Feb 7 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 AM EST FOR
NORTHEASTERN NEW CASTLE...NORTHWESTERN SALEM...NORTHWESTERN
GLOUCESTER AND SOUTHWESTERN DELAWARE COUNTIES...
    
At 953 AM EST, a severe thunderstorm capable of producing a tornado
was located over Elsmere, or over Wilmington, 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.

Locations impacted include...
Wilmington, Chester, Pennsville, Carneys Point, Elsmere, New Castle,
Penns Grove, Newport, Arden, Stanton, Cheyney, Talleyville,
Wilmington Manor, Elam, Chelsea, Beckett, Greenville, Delaware
Memorial Bridge, Chester Township and Concordville.

This includes the following highways...
 Interstate 295 in New Jersey between mile markers 6 and 14.
 Interstate 95 in Pennsylvania between mile markers 0 and 4.
 Interstate 95 in Delaware between mile markers 9 and 23.

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 or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 3984 7561 3984 7559 3986 7559 3990 7557
      3993 7554 3994 7552 3995 7552 3978 7526
      3965 7561 3965 7564 3977 7565
TIME...MOT...LOC 1453Z 242DEG 42KT 3976 7557 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Staarmann

028 
WWUS51 KPHI 071506
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1006 AM EST Fri Feb 7 2020

DEC003-NJC015-033-PAC045-071516-
/O.EXP.KPHI.TO.W.0001.000000T0000Z-200207T1515Z/
New Castle DE-Salem NJ-Gloucester NJ-Delaware PA-
1006 AM EST Fri Feb 7 2020

...THE TORNADO WARNING FOR NORTHEASTERN NEW CASTLE...NORTHWESTERN
SALEM...NORTHWESTERN GLOUCESTER AND SOUTHWESTERN DELAWARE COUNTIES
WILL EXPIRE AT 1015 AM EST...
    
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.

LAT...LON 3984 7561 3984 7559 3986 7559 3990 7557
      3993 7554 3994 7552 3995 7552 3978 7526
      3965 7561 3965 7564 3977 7565
TIME...MOT...LOC 1506Z 242DEG 42KT 3983 7540 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 6, 8:13 PM EST	Storm Warning	PHI		21 hr
Feb 6, 8:24 PM EST	High Wind Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Monmouth, Ocean	21 hr
Feb 7, 8:03 AM EST	Coastal Flood Advisory	PHI	Burlington, Camden, Gloucester, Mercer, Salem	11 hr
Feb 7, 8:18 AM EST	Coastal Flood Statement	PHI	Ocean	11 hr
Feb 7, 9:36 AM EST	Severe Thunderstorm Warning	PHI	Gloucester, Salem	39 min
Feb 7, 9:43 AM EST	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	62 min
Feb 7, 10:10 AM EST	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	65 min
Feb 7, 10:14 AM EST	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 3 more	61 min
Feb 7, 10:43 AM EST	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	47 min
Feb 7, 11:01 AM EST	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Ocean	44 min
Feb 7, 3:27 PM EST	Gale Warning	PHI		9 hr
Feb 7, 6:53 PM EST	Low Water Advisory	PHI		9 hr
Feb 7, 4:00 AM EST	Winter Weather Advisory	PHI	Carbon, Monroe	14 hr
Feb 7, 8:52 AM EST	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware, Montgomery	53 min
Feb 7, 9:24 AM EST	Severe Thunderstorm Warning	PHI	Kent, New Castle, Sussex	66 min
Feb 7, 8:49 AM EST	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	56 min
Feb 7, 2:13 PM EST	Coastal Flood Advisory	PHI	Kent	7 hr

Nearby

Tornado Warnings in New Jersey, 2020 Tornado Warnings in Pennsylvania, 2020 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.