Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 274, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2023, 6:58 PM EDT for Kent County, New Castle County, Sussex County, Delaware; 6 counties in New Jersey; 4 counties in Maryland. It was in force for 62 min. 3 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
- Aug 7, 2023, 6:58 PM EDT (22:58 UTC)
- Expired
- Aug 7, 2023, 8:00 PM EDT
- In force
- 62 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 0.88 in
- Wind
- 70.0 mph
Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 37 km from the middle of the area, began a volume at 22:57 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 |
|---|---|---|---|
| Aug 7, 7:20 PM EDT | TSTM WND DMG | 1 S Hope, MD | Trees down on Dean Road. Time estimated from radar. |
| Aug 7, 7:30 PM EDT | TSTM WND DMG | Oxford, MD | Damage reported to a restaurant in Oxford. Time estimated from radar. |
| Aug 7, 7:45 PM EDT | TSTM WND DMG | Bozman, MD | Abundance of trees and wires down in Bozman, MD. 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 |
|---|---|---|---|
| Aug 7, 3:13 PM EDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.0 hours before the alert went out and 121 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
- 74 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 1004 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
368
WUUS51 KPHI 072258
SVRPHI
DEC001-003-005-MDC011-029-035-041-NJC001-007-009-011-015-033-080000-
/O.NEW.KPHI.SV.W.0274.230807T2258Z-230808T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
658 PM EDT Mon Aug 7 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Sussex County in southern Delaware...
South central New Castle County in northern Delaware...
Kent County in central Delaware...
Talbot County in eastern Maryland...
Queen Anne's County in northeastern Maryland...
Caroline County in eastern Maryland...
Central Kent County in northeastern Maryland...
Southeastern Camden County in southern New Jersey...
Atlantic County in southern New Jersey...
Cumberland County in southern New Jersey...
Southern Salem County in southern New Jersey...
Southeastern Gloucester County in southern New Jersey...
Northwestern Cape May County in southern New Jersey...
* Until 800 PM EDT.
* At 657 PM EDT, severe thunderstorms were located along a line
extending from near Woodland Beach to near Sudlersville to near
Stevensville to Romancoke to near Golden Beach, moving east at 45
mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Vineland, Dover, Millville, Bridgeton, Easton, Centerville,
Cumberland, Talbot, Hammonton, Smyrna, Milford, Buena, Denton,
Centreville, Egg Harbor City, Laurel Lake, Harrington, Camden,
Clayton and Federalsburg.
This includes Atlantic City Expressway between mile markers 11 and
32.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM EDT for central,
northern and southern Delaware...eastern and northeastern Maryland...
and southern New Jersey.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 1100 PM EDT for central,
northern and southern Delaware...eastern and northeastern Maryland...
and southern New Jersey.
&&
LAT...LON 3886 7626 3886 7625 3879 7620 3879 7619
3903 7632 3898 7628 3915 7590 3946 7555
3971 7474 3954 7450 3924 7483 3910 7531
3894 7534 3865 7572 3870 7590 3857 7604
3876 7630 3867 7634 3868 7634
TIME...MOT...LOC 2257Z 263DEG 38KT 3939 7552 3917 7581 3903 7629 3887
7632 3851 7678
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
RCM1 follow-up statement
558
WWUS51 KPHI 072334
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
734 PM EDT Mon Aug 7 2023
DEC003-MDC029-NJC007-015-033-072344-
/O.CAN.KPHI.SV.W.0274.000000T0000Z-230808T0000Z/
New Castle DE-Kent MD-Salem NJ-Camden NJ-Gloucester NJ-
734 PM EDT Mon Aug 7 2023
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL NEW CASTLE...
CENTRAL KENT...SOUTHERN SALEM...SOUTHEASTERN CAMDEN AND SOUTHEASTERN
GLOUCESTER COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 PM EDT for central and
southern Delaware...eastern and northeastern Maryland...and southern
New Jersey.
LAT...LON 3874 7628 3877 7631 3884 7627 3884 7626
3879 7622 3896 7612 3913 7578 3926 7534
3971 7474 3954 7450 3924 7484 3910 7531
3894 7534 3865 7572 3870 7590 3857 7604
3872 7624 3877 7624 3868 7633
TIME...MOT...LOC 2334Z 263DEG 38KT 3943 7505 3921 7534 3907 7582 3891
7585 3856 7631
$$
DEC001-005-MDC011-035-041-NJC001-009-011-080000-
/O.CON.KPHI.SV.W.0274.000000T0000Z-230808T0000Z/
Sussex DE-Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-Atlantic NJ-
Cumberland NJ-Cape May NJ-
734 PM EDT Mon Aug 7 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR NORTHWESTERN SUSSEX...KENT...TALBOT...SOUTHEASTERN QUEEN
ANNE'S...CAROLINE...ATLANTIC...CUMBERLAND AND NORTHWESTERN CAPE MAY
COUNTIES...
At 734 PM EDT, severe thunderstorms were located along a line
extending from South Vineland to 9 miles west of Fortesque to near
Goldsboro to near Denton to near Taylors Island, moving east at 45
mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Vineland, Dover, Millville, Easton, Cumberland, Talbot, Hammonton,
Milford, Buena, Denton, Egg Harbor City, Laurel Lake, Harrington,
Camden, Federalsburg, Weymouth, Bridgeville, Greensboro, Oakland and
Estell Manor.
This includes Atlantic City Expressway between mile markers 11 and
29.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM EDT for central and
southern Delaware...eastern and northeastern Maryland...and southern
New Jersey.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3874 7628 3877 7631 3884 7627 3884 7626
3879 7622 3896 7612 3913 7578 3926 7534
3971 7474 3954 7450 3924 7484 3910 7531
3894 7534 3865 7572 3870 7590 3857 7604
3872 7624 3877 7624 3868 7633
TIME...MOT...LOC 2334Z 263DEG 38KT 3943 7505 3921 7534 3907 7582 3891
7585 3856 7631
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 5:37 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 53 min |
| Aug 7, 5:57 PM EDT | Areal Flood Advisory | PHI | New Castle | 79 min |
| Aug 7, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 63 min |
| Aug 7, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 69 min |
| Aug 7, 6:29 PM EDT | Areal Flood Advisory | PHI | New Castle | 63 min |
| Aug 7, 6:52 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 95 min |
| Aug 7, 7:56 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 49 min |
| Aug 7, 5:39 PM EDT | Special Marine Warning | PHI | 66 min | |
| Aug 7, 6:49 PM EDT | Special Marine Warning | PHI | 86 min | |
| Aug 7, 7:20 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester, Hunterdon, Mercer and 4 more | 58 min |
| Aug 7, 7:21 PM EDT | Special Marine Warning | PHI | 92 min | |
| Aug 7, 7:27 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 48 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2023Severe Thunderstorm Warnings in Maryland, 2023Severe Thunderstorm Warnings in Delaware, 2023Every severe thunderstorm warning in 2023
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.