Alert archive / New Jersey / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 137, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 24, 2017, 10:38 PM EDT for Kent County, New Castle County, Delaware; Atlantic County, Cumberland County, Salem County, New Jersey. It was in force for 52 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 24, 2017, 10:38 PM EDT (02:38 UTC)
- Expired
- Jul 24, 2017, 11:30 PM EDT
- In force
- 52 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, Atlantic County, NJ, Cumberland County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 58 km from the middle of the area, began a volume at 02:38 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, 2.6 hours before the alert went out and 157 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
- 161 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1504 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
829
WUUS51 KPHI 250238
SVRPHI
DEC001-003-NJC001-011-033-250330-
/O.NEW.KPHI.SV.W.0137.170725T0238Z-170725T0330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1038 PM EDT MON JUL 24 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern New Castle County in northern Delaware...
Northern Kent County in central Delaware...
Southwestern Atlantic County in southern New Jersey...
Cumberland County in southern New Jersey...
Southern Salem County in southern New Jersey...
* Until 1130 PM EDT
* At 1038 PM EDT, severe thunderstorms were located along a line
extending from Hope Creek to near Green Spring to near Cheswold to
near Hartly, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Vineland, Dover, Millville, Bridgeton, Middletown, Cumberland,
Smyrna, Salem, Buena, Laurel Lake, Alloway, Camden, Clayton,
Weymouth, Quinton, Estell Manor, Cheswold, Greenwich, Shiloh and
Hartly.
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 3937 7574 3958 7557 3954 7502 3951 7499
3954 7496 3952 7471 3917 7501 3919 7509
3916 7517 3939 7548 3939 7549 3927 7537
3906 7537 3913 7575 3930 7576
TIME...MOT...LOC 0238Z 280DEG 33KT 3947 7553 3936 7564 3920 7565 3912
7571
HAIL...<.75IN
WIND...60MPH
$$
JRK2 follow-up statements
820
WWUS51 KPHI 250304
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1104 PM EDT MON JUL 24 2017
DEC003-250314-
/O.CAN.KPHI.SV.W.0137.000000T0000Z-170725T0330Z/
New Castle DE-
1104 PM EDT MON JUL 24 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NEW CASTLE COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3917 7501 3919 7509 3916 7517 3930 7535
3927 7538 3906 7537 3910 7557 3936 7547
3928 7539 3930 7537 3938 7546 3953 7536
3953 7500 3951 7499 3953 7498 3952 7471
TIME...MOT...LOC 0304Z 274DEG 31KT 3947 7527 3936 7538 3920 7539 3912
7545
$$
DEC001-NJC001-011-033-250330-
/O.CON.KPHI.SV.W.0137.000000T0000Z-170725T0330Z/
Kent DE-Atlantic NJ-Cumberland NJ-Salem NJ-
1104 PM EDT MON JUL 24 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR NORTHEASTERN KENT...SOUTHWESTERN ATLANTIC...CUMBERLAND AND
SOUTHEASTERN SALEM COUNTIES...
At 1104 PM EDT, severe thunderstorms were located along a line
extending from Shiloh to near Greenwich to 7 miles northeast of Dover
to Dover Base Housing, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
These severe storms will be near...
Bridgeton, Seabrook Farms and Olivet around 1110 PM EDT.
Millville and Rosenhayn around 1115 PM EDT.
Vineland, Cedarville and Fairton around 1120 PM EDT.
South Vineland, Newport and Fortesque around 1125 PM EDT.
Cumberland, Buena, Laurel Lake, Dividing Creek, Bivalve, Port
Norris, Port Elizabeth, Mauricetown and Bricksboro around 1130 PM
EDT.
Other locations impacted by these severe thunderstorms include
Highland Acres, Rodney Village, Wyoming, Centerton, Little Creek,
Kent Acres and Leipsic.
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 3917 7501 3919 7509 3916 7517 3930 7535
3927 7538 3906 7537 3910 7557 3936 7547
3928 7539 3930 7537 3938 7546 3953 7536
3953 7500 3951 7499 3953 7498 3952 7471
TIME...MOT...LOC 0304Z 274DEG 31KT 3947 7527 3936 7538 3920 7539 3912
7545
HAIL...<.75IN
WIND...60MPH
$$
JRK755
WWUS51 KPHI 250325 RRA
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1125 PM EDT MON JUL 24 2017
DEC001-NJC001-011-033-250335-
/O.EXP.KPHI.SV.W.0137.000000T0000Z-170725T0330Z/
Kent DE-Atlantic NJ-Cumberland NJ-Salem NJ-
1125 PM EDT MON JUL 24 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN KENT...
SOUTHWESTERN ATLANTIC...CUMBERLAND AND SOUTHEASTERN SALEM COUNTIES
WILL EXPIRE AT 1130 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire. However gusty winds
and heavy rain are still possible with these thunderstorms.
LAT...LON 3917 7501 3919 7509 3916 7517 3930 7535
3927 7538 3906 7537 3910 7557 3936 7547
3928 7539 3930 7537 3938 7546 3953 7536
3953 7500 3951 7499 3953 7498 3952 7471
TIME...MOT...LOC 0325Z 280DEG 33KT 3944 7507 3933 7518 3917 7519 3909
7525
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 8:08 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 52 min |
| Jul 24, 8:59 PM EDT | Areal Flood Advisory | PHI | New Castle | 2 hr |
| Jul 24, 9:01 PM EDT | Special Weather Statement | PHI | New Castle | 59 min |
| Jul 24, 10:01 PM EDT | Areal Flood Advisory | PHI | New Castle | 119 min |
| Jul 24, 10:06 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 39 min |
| Jul 24, 10:50 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 40 min |
| Jul 24, 11:30 PM EDT | Special Weather Statement | PHI | Kent | 45 min |
| Jul 25, 12:16 AM EDT | Special Weather Statement | PHI | Sussex | 44 min |
| Jul 25, 12:34 AM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 41 min |
| Jul 25, 1:15 AM EDT | Special Weather Statement | PHI | Sussex | 45 min |
| Jul 25, 3:25 PM EDT | Coastal Flood Advisory | PHI | Sussex | 11 hr |
| Jul 24, 8:22 PM EDT | Special Weather Statement | PHI | Burlington, Mercer | 38 min |
| Jul 24, 8:28 PM EDT | Special Marine Warning | PHI | 92 min | |
| Jul 24, 9:06 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden | 114 min |
| Jul 24, 10:20 PM EDT | Special Marine Warning | PHI | 85 min | |
| Jul 24, 10:58 PM EDT | Special Marine Warning | PHI | 92 min | |
| Jul 24, 11:47 PM EDT | Special Marine Warning | PHI | 118 min | |
| Jul 25, 12:40 AM EDT | Special Marine Warning | PHI | 2 hr | |
| Jul 25, 1:40 AM EDT | Special Marine Warning | PHI | 2 hr | |
| Jul 25, 3:14 AM EDT | Areal Flood Warning | PHI | Salem | 6 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2017Severe Thunderstorm Warnings in Delaware, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.