Alert archive / New Jersey / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 61, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 21, 2017, 5:03 PM EDT for 5 counties in New Jersey. It was in force for 42 min. 6 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
- Jun 21, 2017, 5:03 PM EDT (21:03 UTC)
- Expired
- Jun 21, 2017, 5:45 PM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Ocean County, NJ
The radar
The Philadelphia radar (KDIX), 23 km from the middle of the area, began a volume at 21:04 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 |
|---|---|---|---|
| Jun 21, 5:08 PM EDT | TSTM WND DMG | Mount Holly Wfo, NJ | MOUNT HOLLY TWP... SEVERAL TREES DOWN... TIME ESTIMATED |
| Jun 21, 5:09 PM EDT | TSTM WND DMG | Eastampton Twp, NJ | SEVERAL TRESS DOWN... TIME ESTIMATED |
| Jun 21, 5:09 PM EDT | TSTM WND GST 50 | 2 E Mount Holly Wfo, NJ | SMALL BRANCHES FELL... TIME ESTIMATED |
| Jun 21, 5:11 PM EDT | TSTM WND GST 49 | South Jersey Airport, NJ | |
| Jun 21, 5:12 PM EDT | TSTM WND DMG | Southampton Twp, NJ | LARGE TREE DOWN AND BLOCKING ON ISACC BUDD RD... TIME ESTIMATED |
| Jun 21, 5:15 PM EDT | TSTM WND DMG | E Eastampton Twp, NJ | LARGE TREE LIMBS DOWN AND FENCE DAMAGE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 9.1 hours before the alert went out and 188 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
- 23 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 1706 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
747
WUUS51 KPHI 212103
SVRPHI
NJC001-005-007-015-029-212145-
/O.NEW.KPHI.SV.W.0061.170621T2103Z-170621T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
503 PM EDT WED JUN 21 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
North central Atlantic County in southern New Jersey...
West central Ocean County in southern New Jersey...
Camden County in southern New Jersey...
North central Gloucester County in southern New Jersey...
Burlington County in southern New Jersey...
* Until 545 PM EDT
* At 501 PM EDT, severe thunderstorms were located along a line
extending from near Bristol to near Mount Laurel to National Park,
moving southeast at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Trained weather spotters. Numerous downed trees and wires
have been reported in Pottstown, Green Lane and Franconia
Montgomery County between 400 and 415 PM. Additional
downed trees were reported in Radnor Township in northern
Delaware county around 435 PM.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Gloucester City, Cherry Hill, Evesham, Mount Laurel, Willingboro,
Voorhees, Medford, Lindenwold, Hammonton, Lumberton, Bellmawr,
Beachwood, Woodbury, Burlington, Bristol, Mount Holly, Berlin,
Tabernacle, Shamong and Magnolia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm has a history of producing wind damage. For your
protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3973 7434 3958 7459 3985 7520 3998 7493
4007 7490 4011 7483 3994 7420
TIME...MOT...LOC 2101Z 294DEG 44KT 4013 7489 3998 7492 3988 7519
HAIL...<.75IN
WIND...60MPH
$$
JRK1 follow-up statement
989
WWUS51 KPHI 212123
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
523 PM EDT WED JUN 21 2017
NJC015-212131-
/O.CAN.KPHI.SV.W.0061.000000T0000Z-170621T2145Z/
Gloucester NJ-
523 PM EDT WED JUN 21 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL GLOUCESTER
COUNTY IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3974 7495 3979 7505 3988 7503 3996 7477
4008 7473 3994 7420 3973 7434 3958 7459
TIME...MOT...LOC 2121Z 294DEG 44KT 4004 7464 3989 7467 3979 7494
$$
NJC001-005-007-029-212145-
/O.CON.KPHI.SV.W.0061.000000T0000Z-170621T2145Z/
Atlantic NJ-Ocean NJ-Camden NJ-Burlington NJ-
523 PM EDT WED JUN 21 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTH CENTRAL ATLANTIC...WEST CENTRAL OCEAN...CENTRAL CAMDEN AND
BURLINGTON COUNTIES...
At 521 PM EDT, severe thunderstorms were located along a line
extending from Wrightstown to Leisuretowne to Berlin, moving
southeast at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Trained weather spotters. Numerous downed trees and wires
have been reported from these storms in Montgomery County,
northern Delaware County and in Philadelphia between 400
and 500 PM.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Evesham, Voorhees, Medford, Lindenwold, Hammonton, Beachwood, Berlin,
Tabernacle, Shamong, Magnolia, Egg Harbor City, Presidential Lakes
Estates, Chesilhurst, Pemberton, Wrightstown, Atsion, Marlton,
Leisuretowne, Wharton State Forest and Presidential Lakes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm has a history of producing wind damage. For your
protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3974 7495 3979 7505 3988 7503 3996 7477
4008 7473 3994 7420 3973 7434 3958 7459
TIME...MOT...LOC 2121Z 294DEG 44KT 4004 7464 3989 7467 3979 7494
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 |
|---|---|---|---|---|
| Jun 21, 4:21 PM EDT | Special Weather Statement | PHI | Hunterdon | 39 min |
| Jun 21, 4:28 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester | 47 min |
| Jun 21, 5:19 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Monmouth, Ocean | 41 min |
| Jun 21, 5:36 PM EDT | Special Marine Warning | PHI | 84 min | |
| Jun 21, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Ocean | 37 min |
| Jun 21, 5:54 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 26 min |
| Jun 21, 6:03 PM EDT | Special Marine Warning | PHI | 42 min | |
| Jun 21, 6:25 PM EDT | Special Marine Warning | PHI | 95 min | |
| Jun 21, 6:27 PM EDT | Special Weather Statement | PHI | Cumberland, Salem | 33 min |
| Jun 21, 6:31 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cumberland, Gloucester, Salem | 44 min |
| Jun 21, 6:52 PM EDT | Special Marine Warning | PHI | 53 min | |
| Jun 21, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland | 48 min |
| Jun 21, 7:05 PM EDT | Special Weather Statement | PHI | Cape May | 25 min |
| Jun 21, 7:11 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 64 min |
| Jun 21, 7:17 PM EDT | Special Marine Warning | PHI | 88 min | |
| Jun 21, 7:56 PM EDT | Special Marine Warning | PHI | 94 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 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.