Alert archive / New Jersey / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 126, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 24, 2017, 2:02 AM EDT for Cumberland County, Gloucester County, Salem County, New Jersey; New Castle County, Delaware; Cecil County, Maryland. It was in force for 43 min. 1 report 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 24, 2017, 2:02 AM EDT (06:02 UTC)
- Expired
- Jul 24, 2017, 2:45 AM EDT
- In force
- 43 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Cecil County, MD, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 90 km from the middle of the area, began a volume at 06:01 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 24, 2:55 AM EDT | TSTM WND DMG | 2 E Swedesboro, NJ | TWO LARGE TREES DOWN ON BACK CREEK RD. |
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 00:00Z, 6.0 hours before the alert went out and 173 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
- 431 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 1103 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
The text
As transmitted.
400
WUUS51 KPHI 240602
SVRPHI
DEC003-MDC015-NJC011-015-033-240645-
/O.NEW.KPHI.SV.W.0126.170724T0602Z-170724T0645Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
202 AM EDT MON JUL 24 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
New Castle County in northern Delaware...
Southeastern Cecil County in northeastern Maryland...
Northwestern Cumberland County in southern New Jersey...
Salem County in southern New Jersey...
Northwestern Gloucester County in southern New Jersey...
* Until 245 AM EDT
* At 201 AM EDT, severe thunderstorms were located along a line
extending from Newark to near Warwick, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Wilmington, Newark, Middletown, Elkton, Pennsville, Carneys Point,
Elsmere, New Castle, Penns Grove, Salem, Woodstown, Alloway,
Quinton, Swedesboro, Delaware City, Newport, Cecilton, Shiloh,
Warwick and Barksdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to damaging winds...frequent cloud to ground lightning
is occurring with this storm. Move indoors immediately.
Remember...if you can hear thunder...you are close enough to be
struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3965 7586 3971 7579 3977 7564 3981 7542
3980 7541 3981 7540 3983 7531 3977 7524
3959 7523 3941 7530 3938 7578 3938 7582
3937 7586 3944 7591
TIME...MOT...LOC 0601Z 257DEG 25KT 3967 7573 3941 7582
HAIL...<.75IN
WIND...60MPH
$$
JRK1 follow-up statement
378
WWUS51 KPHI 240623
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
223 AM EDT MON JUL 24 2017
MDC015-240633-
/O.CAN.KPHI.SV.W.0126.000000T0000Z-170724T0645Z/
Cecil MD-
223 AM EDT MON JUL 24 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CECIL COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3972 7576 3977 7564 3981 7545 3980 7541
3981 7540 3983 7531 3977 7524 3968 7523
3958 7523 3942 7530 3938 7577 3939 7577
TIME...MOT...LOC 0623Z 255DEG 24KT 3970 7558 3944 7567
$$
DEC003-NJC011-015-033-240645-
/O.CON.KPHI.SV.W.0126.000000T0000Z-170724T0645Z/
New Castle DE-Cumberland NJ-Salem NJ-Gloucester NJ-
223 AM EDT MON JUL 24 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM EDT
FOR NEW CASTLE...NORTHWESTERN CUMBERLAND...SALEM AND NORTHWESTERN
GLOUCESTER COUNTIES...
At 223 AM EDT, severe thunderstorms were located along a line
extending from Wilmington Manor to near Middletown, moving east at 30
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Wilmington, Newark, Middletown, Pennsville, Carneys Point, Elsmere,
New Castle, Penns Grove, Salem, Woodstown, Alloway, Quinton,
Swedesboro, Delaware City, Newport, Shiloh, Stanton, Glasgow, Bear
and Hancocks Bridge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to damaging winds...frequent cloud to ground lightning
is occurring with this storm. Move indoors immediately.
Remember...if you can hear thunder...you are close enough to be
struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3972 7576 3977 7564 3981 7545 3980 7541
3981 7540 3983 7531 3977 7524 3968 7523
3958 7523 3942 7530 3938 7577 3939 7577
TIME...MOT...LOC 0623Z 255DEG 24KT 3970 7558 3944 7567
HAIL...<.75IN
WIND...60MPH
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 9:39 PM EDT | Areal Flood Advisory | PHI | Gloucester, Salem | 4 hr |
| Jul 23, 10:18 PM EDT | Flash Flood Warning | PHI | Atlantic, Camden, Cumberland, Gloucester, Salem | 8 hr |
| Jul 23, 10:23 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Gloucester, Salem | 52 min |
| Jul 23, 10:54 PM EDT | Special Weather Statement | PHI | Gloucester | 51 min |
| Jul 23, 11:38 PM EDT | Tornado Warning | PHI | Atlantic, Cape May | 37 min |
| Jul 23, 11:41 PM EDT | Special Marine Warning | PHI | 64 min | |
| Jul 23, 11:43 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Cumberland, Ocean, Salem | 6 hr |
| Jul 23, 11:50 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Monmouth, Ocean | 6 hr |
| Jul 24, 12:04 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cumberland, Gloucester, Salem | 41 min |
| Jul 24, 12:35 AM EDT | Special Marine Warning | PHI | 55 min | |
| Jul 24, 12:56 AM EDT | Special Weather Statement | PHI | Atlantic | 34 min |
| Jul 24, 1:23 AM EDT | Special Marine Warning | PHI | 97 min | |
| Jul 24, 1:33 AM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Salem | 5 hr |
| Jul 24, 2:08 AM EDT | Special Marine Warning | PHI | 97 min | |
| Jul 24, 2:10 AM EDT | Special Marine Warning | PHI | 95 min | |
| Jul 24, 2:34 AM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Cumberland, Gloucester, Salem | 41 min |
| Jul 24, 2:44 AM EDT | Special Marine Warning | PHI | 91 min | |
| Jul 24, 3:00 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Salem | 4 hr |
| Jul 24, 3:03 AM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 57 min |
| Jul 24, 3:17 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Warren | 118 min |
| Jul 24, 3:21 AM EDT | Areal Flood Advisory | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 3 hr |
| Jul 24, 3:34 AM EDT | Special Marine Warning | PHI | 116 min | |
| Jul 24, 3:36 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset and 2 more | 6 hr |
| Jul 24, 3:55 AM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 50 min |
| Jul 24, 9:30 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Middlesex, Morris, Somerset | 60 min |
| Jul 24, 10:04 AM EDT | Small Craft Advisory for Hazardous Seas | PHI | 8 hr | |
| Jul 24, 10:40 AM EDT | Areal Flood Warning | PHI | Cumberland | 10 hr |
| Jul 24, 2:55 PM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Middlesex, Monmouth, Ocean | 11 hr |
| Jul 24, 7:07 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Warren | 113 min |
| Jul 24, 7:48 PM EDT | Areal Flood Advisory | PHI | Hunterdon | 117 min |
| Jul 23, 9:08 PM EDT | River Flood Warning | PHI | New Castle | 17 hr |
| Jul 24, 1:10 AM EDT | Areal Flood Advisory | PHI | New Castle | 4 hr |
| Jul 24, 1:52 AM EDT | Severe Thunderstorm Warning | PHI | Kent | 53 min |
| Jul 24, 3:05 AM EDT | River Flood Warning | PHI | New Castle | 8 hr |
| Jul 24, 4:17 AM EDT | River Flood Warning | PHI | New Castle | 11 hr |
| Jul 23, 9:28 PM EDT | Areal Flood Warning | PHI | Cecil | 8 hr |
| Jul 24, 1:05 AM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 55 min |
| Jul 24, 1:27 AM EDT | Tornado Warning | PHI | Kent, Queen Anne's | 21 min |
| Jul 24, 4:40 AM EDT | Areal Flood Warning | PHI | Cecil | 4 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2017Severe Thunderstorm Warnings in Delaware, 2017Severe Thunderstorm Warnings in Maryland, 2017Every severe thunderstorm warning in 2017
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.