Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 40, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 24, 2018, 7:32 PM EDT for 4 counties in Pennsylvania. It was in force for 28 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
- Jun 24, 2018, 7:32 PM EDT (23:32 UTC)
- Expired
- Jun 24, 2018, 8:00 PM EDT
- In force
- 28 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 71 km from the middle of the area, began a volume at 23:34 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 24, 7:32 PM EDT | TSTM WND DMG | Whitemarsh Twp, PA | TREES DOWN. TIME ESTIMATED FROM RADAR. |
| Jun 24, 7:34 PM EDT | TSTM WND DMG | Plymouth Meeting, PA | LARGE TREE LIMBS NEAR OR GREATER THAN A FOOT IN DIAMETER DOWNED IN A RESIDENTIAL AREA. NO SIGNIFICANT DAMAGE APPEARS TO HAVE BEEN CAUSED BY THEM. TIME ESTIMATED FROM RADAR. |
| Jun 24, 7:45 PM EDT | TSTM WND DMG | Cheltenham, PA | TREES DOWN IN THE JOHNS ROAD AREA. TIME ESTIMATED FROM RADAR. |
| Jun 24, 7:52 PM EDT | TSTM WND DMG | Fox Chase, PA | TREES DOWN IN SEVERAL AREAS OF NORTHEAST PHILADELPHIA. TIME ESTIMATED FROM RADAR. |
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, 11.5 hours before the alert went out and 220 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 538 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
104
WUUS51 KPHI 242332
SVRPHI
PAC017-045-091-101-250000-
/O.NEW.KPHI.SV.W.0040.180624T2332Z-180625T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
732 PM EDT SUN JUN 24 2018
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Montgomery County in southeastern Pennsylvania...
South central Bucks County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
Northeastern Delaware County in southeastern Pennsylvania...
* Until 800 PM EDT.
* At 731 PM EDT, a severe thunderstorm was located over Conshohocken,
or 11 miles northwest of Philadelphia, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Philadelphia, Bensalem, Norristown, West Norriton, East Norriton,
Yeadon, Conshohocken, Palmyra, Ambler, Jenkintown, Narberth, East
Lansdowne, Rockledge, Abington, Bryn Athyn, Wissinoming, Morris
Park, Bryn Mawr, Trout Lake and Tacony.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4012 7487 3997 7510 3996 7513 3995 7514
3991 7519 4001 7543 4003 7540 4004 7541
4007 7536 4006 7539 4008 7541 4020 7532
TIME...MOT...LOC 2331Z 291DEG 27KT 4008 7532
HAIL...<.75IN
WIND...60MPH
$$
MPS2 follow-up statements
275
WWUS51 KPHI 242349
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
749 PM EDT SUN JUN 24 2018
PAC045-242358-
/O.CAN.KPHI.SV.W.0040.000000T0000Z-180625T0000Z/
Delaware PA-
749 PM EDT SUN JUN 24 2018
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN DELAWARE COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4012 7487 3997 7510 3996 7513 3995 7514
3991 7519 4003 7530 4016 7512
TIME...MOT...LOC 2348Z 291DEG 27KT 4003 7516
$$
PAC017-091-101-250000-
/O.CON.KPHI.SV.W.0040.000000T0000Z-180625T0000Z/
Montgomery PA-Bucks PA-Philadelphia PA-
749 PM EDT SUN JUN 24 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR SOUTHEASTERN MONTGOMERY...SOUTH CENTRAL BUCKS AND PHILADELPHIA
COUNTIES...
At 748 PM EDT, a severe thunderstorm was located over Germantown, or
over Philadelphia, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Philadelphia, Bensalem, Palmyra, Jenkintown, Narberth, Rockledge,
Abington, Bryn Athyn, Wissinoming, Willow Grove, Germantown,
Northeast Philadelphia, Center City, Tacony, Andalusia, Holmesburg,
Kensington, Roxborough, Chestnut Hill and Pennsauken.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4012 7487 3997 7510 3996 7513 3995 7514
3991 7519 4003 7530 4016 7512
TIME...MOT...LOC 2348Z 291DEG 27KT 4003 7516
HAIL...<.75IN
WIND...60MPH
$$
MPS218
WWUS51 KPHI 242359
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
759 PM EDT SUN JUN 24 2018
PAC017-091-101-250008-
/O.EXP.KPHI.SV.W.0040.000000T0000Z-180625T0000Z/
Montgomery PA-Bucks PA-Philadelphia PA-
759 PM EDT SUN JUN 24 2018
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MONTGOMERY...
SOUTH CENTRAL BUCKS AND PHILADELPHIA COUNTIES WILL EXPIRE AT 800 PM
EDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire. However gusty winds and heavy rain are still
possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
in Mount Holly NJ.
LAT...LON 4012 7487 3997 7510 3996 7513 3995 7514
3991 7519 4003 7530 4016 7512
TIME...MOT...LOC 2358Z 291DEG 27KT 4001 7508
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 5:30 PM EDT | Special Weather Statement | PHI | Monroe | 30 min |
| Jun 24, 5:59 PM EDT | Special Weather Statement | PHI | Berks | 31 min |
| Jun 24, 6:04 PM EDT | Special Weather Statement | PHI | Berks | 26 min |
| Jun 24, 6:14 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 46 min |
| Jun 24, 6:36 PM EDT | Special Weather Statement | PHI | Chester, Montgomery | 39 min |
| Jun 24, 6:50 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 25 min |
| Jun 24, 6:52 PM EDT | Special Weather Statement | PHI | Berks | 38 min |
| Jun 24, 7:08 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Montgomery | 114 min |
| Jun 24, 7:10 PM EDT | Special Weather Statement | PHI | Chester, Delaware, Montgomery | 50 min |
| Jun 24, 7:22 PM EDT | Special Weather Statement | PHI | Northampton | 23 min |
| Jun 24, 7:56 PM EDT | Special Weather Statement | PHI | Philadelphia | 34 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2018Every severe thunderstorm warning in 2018
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.