Alert archive / Maryland / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 168, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 22, 2020, 5:54 PM EDT for 4 counties in Maryland; Kent County, New Castle County, Delaware; Gloucester County, Salem County, New Jersey. It was in force for 51 min. 4 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
- Jul 22, 2020, 5:54 PM EDT (21:54 UTC)
- Expired
- Jul 22, 2020, 6:45 PM EDT
- In force
- 51 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kent County, DE, New Castle County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Gloucester County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 59 km from the middle of the area, began a volume at 21:58 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 |
|---|---|---|---|
| Jul 22, 6:15 PM EDT | MARINE TSTM WIND 50 | 4 Ssw Elsinboro Twp, NJ | LOWER ALLOWAYS CREEK, NJ MESONET STATION. |
| Jul 22, 6:25 PM EDT | TSTM WND GST 59 | 4 Ssw Elsinboro Twp, NJ | LOWER ALLOWAYS CREEK, NJ MESONET STATION. |
| Jul 22, 6:25 PM EDT | MARINE TSTM WIND 59 | 4 Ssw Elsinboro Twp, NJ | LOWER ALLOWAYS CREEK, NJ MESONET STATION. |
| Jul 22, 6:26 PM EDT | TSTM WND DMG | 2 Nnw Cheswold, DE | DOWNED TREE AND WIRES NEAR HICKORY RIDGE ROAD IN CHESWOLD. 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 |
|---|---|---|---|
| Jul 22, 2:57 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.9 hours before the alert went out and 137 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.
- Mixed-layer CAPE
- 248 J/kg
- Mixed-layer CIN
- -214 J/kg
- Mixed-layer LCL
- 1163 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
268
WUUS51 KPHI 222154
SVRPHI
DEC001-003-MDC011-015-029-035-NJC015-033-222245-
/O.NEW.KPHI.SV.W.0168.200722T2154Z-200722T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
554 PM EDT Wed Jul 22 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
New Castle County in northern Delaware...
Northwestern Kent County in central Delaware...
Queen Anne's County in northeastern Maryland...
Northeastern Caroline County in eastern Maryland...
Northeastern Kent County in northeastern Maryland...
Southeastern Cecil County in northeastern Maryland...
Western Salem County in southern New Jersey...
Western Gloucester County in southern New Jersey...
* Until 645 PM EDT.
* At 553 PM EDT, severe thunderstorms were located along a line
extending from near Newark to Massey to near Centerville, moving
east at 25 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Wilmington, Newark, Middletown, Elkton, Centerville, Pennsville,
Smyrna, Carneys Point, Elsmere, New Castle, Penns Grove, Salem,
Centreville, Clayton, Quinton, Greensboro, Oakland, Delaware City,
Cheswold and Newport.
This includes the following highways...
New Jersey Turnpike near exit 1.
Interstate 95 in Delaware between mile markers 0 and 14.
Interstate 95 in Maryland near mile marker 109.
Interstate 295 in New Jersey between mile markers 0 and 12.
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.
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3895 7623 3928 7587 3971 7578 3979 7533
3935 7546 3898 7575 3893 7620
TIME...MOT...LOC 2153Z 256DEG 20KT 3966 7572 3930 7579 3900 7612
HAIL...0.75IN
WIND...60MPH
$$
MPS2 follow-up statements
794
WWUS51 KPHI 222219
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
619 PM EDT Wed Jul 22 2020
MDC015-029-035-222228-
/O.CAN.KPHI.SV.W.0168.000000T0000Z-200722T2245Z/
Queen Anne's MD-Kent MD-Cecil MD-
619 PM EDT Wed Jul 22 2020
...THE SEVERE THUNDERSTORM WARNING FOR QUEEN ANNE'S...NORTHEASTERN
KENT AND SOUTHEASTERN CECIL COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central and northern Delaware...eastern and northeastern Maryland...
and southern New Jersey.
LAT...LON 3941 7561 3974 7563 3979 7533 3935 7546
3898 7575 3897 7584
TIME...MOT...LOC 2218Z 246DEG 23KT 3976 7557 3943 7555 3901 7577
$$
DEC001-003-MDC011-NJC015-033-222245-
/O.CON.KPHI.SV.W.0168.000000T0000Z-200722T2245Z/
New Castle DE-Kent DE-Caroline MD-Salem NJ-Gloucester NJ-
619 PM EDT Wed Jul 22 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR CENTRAL NEW CASTLE...NORTHWESTERN KENT...NORTHEASTERN CAROLINE...
WESTERN SALEM AND WESTERN GLOUCESTER COUNTIES...
At 618 PM EDT, severe thunderstorms were located along a line
extending from near Elsmere to near Hope Creek to near Goldsboro,
moving northeast at 25 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Wilmington, Pennsville, Smyrna, Carneys Point, Elsmere, New Castle,
Penns Grove, Salem, Clayton, Quinton, Greensboro, Delaware City,
Cheswold, Newport, Goldsboro, Hartly, Woodland Beach, Hancocks
Bridge, Port Penn and Wilmington Manor.
This includes the following highways...
New Jersey Turnpike near exit 1.
Interstate 95 in Delaware between mile markers 10 and 14.
Interstate 295 in New Jersey between mile markers 0 and 12.
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.
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3941 7561 3974 7563 3979 7533 3935 7546
3898 7575 3897 7584
TIME...MOT...LOC 2218Z 246DEG 23KT 3976 7557 3943 7555 3901 7577
HAIL...0.75IN
WIND...60MPH
$$
MPS965
WWUS51 KPHI 222236
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
636 PM EDT Wed Jul 22 2020
DEC001-003-MDC011-NJC015-033-222245-
/O.EXP.KPHI.SV.W.0168.000000T0000Z-200722T2245Z/
New Castle DE-Kent DE-Caroline MD-Salem NJ-Gloucester NJ-
636 PM EDT Wed Jul 22 2020
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL NEW CASTLE...
NORTHWESTERN KENT...NORTHEASTERN CAROLINE...WESTERN SALEM AND WESTERN
GLOUCESTER COUNTIES WILL EXPIRE AT 645 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central and northern Delaware...eastern and northeastern Maryland...
and southern New Jersey.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3941 7561 3974 7563 3979 7533 3935 7546
3898 7575 3897 7584
TIME...MOT...LOC 2235Z 256DEG 20KT 3978 7546 3945 7544 3903 7566
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 9:16 PM EDT | Special Weather Statement | PHI | Kent | 29 min |
| Jul 21, 9:25 PM EDT | Special Weather Statement | PHI | Talbot | 35 min |
| Jul 21, 9:39 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 51 min |
| Jul 21, 9:46 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 29 min |
| Jul 21, 10:14 PM EDT | Special Weather Statement | PHI | Caroline | 46 min |
| Jul 21, 10:21 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 54 min |
| Jul 22, 4:01 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 22 min |
| Jul 22, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 52 min |
| Jul 22, 4:47 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 43 min |
| Jul 22, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 47 min |
| Jul 22, 5:23 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 52 min |
| Jul 22, 5:33 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 57 min |
| Jul 21, 10:57 PM EDT | Special Marine Warning | PHI | 63 min | |
| Jul 22, 2:10 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 50 min |
| Jul 22, 3:04 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 30 min |
| Jul 22, 3:18 PM EDT | Special Weather Statement | PHI | Morris, Warren | 42 min |
| Jul 22, 3:50 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Sussex, Warren | 29 min |
| Jul 22, 4:33 PM EDT | Special Weather Statement | PHI | Morris | 57 min |
| Jul 22, 4:56 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Somerset | 49 min |
| Jul 22, 5:16 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Sussex, Warren | 59 min |
| Jul 22, 5:23 PM EDT | Areal Flood Advisory | PHI | Warren | 3 hr |
| Jul 22, 5:40 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Hunterdon, Mercer, Somerset | 65 min |
| Jul 22, 5:49 PM EDT | Special Marine Warning | PHI | 86 min | |
| Jul 22, 6:04 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren | 60 min |
| Jul 22, 6:12 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Salem | 48 min |
| Jul 22, 6:17 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean, Somerset | 52 min |
| Jul 22, 6:46 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem | 44 min |
| Jul 22, 6:47 PM EDT | Special Marine Warning | PHI | 28 min | |
| Jul 22, 6:52 PM EDT | Areal Flood Advisory | PHI | Middlesex, Somerset | 113 min |
| Jul 22, 6:52 PM EDT | Special Marine Warning | PHI | 41 min | |
| Jul 22, 7:20 PM EDT | Special Marine Warning | PHI | 55 min | |
| Jul 22, 7:23 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more | 52 min |
| Jul 22, 7:58 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Ocean | 47 min |
| Jul 22, 7:59 PM EDT | Special Marine Warning | PHI | 61 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2020Severe Thunderstorm Warnings in Delaware, 2020Severe Thunderstorm Warnings in New Jersey, 2020Every severe thunderstorm warning 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.