Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 48, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 26, 2019, 5:25 PM EDT for 4 counties in Pennsylvania. It was in force for 30 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
- May 26, 2019, 5:25 PM EDT (21:25 UTC)
- Expired
- May 26, 2019, 5:55 PM EDT
- In force
- 30 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 97 km from the middle of the area, began a volume at 21:27 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.4 hours before the alert went out and 194 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
- 7 J/kg
- Mixed-layer CIN
- -231 J/kg
- Mixed-layer LCL
- 1274 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
137
WUUS51 KPHI 262125
SVRPHI
PAC029-045-091-101-262215-
/O.NEW.KPHI.SV.W.0048.190526T2125Z-190526T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
525 PM EDT Sun May 26 2019
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern Montgomery County in southeastern Pennsylvania...
Chester County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
Delaware County in southeastern Pennsylvania...
* Until 615 PM EDT.
* At 524 PM EDT, severe thunderstorms were located along a line
extending from near Phoenixville to Honey Brook, moving east at 50
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Philadelphia, West Chester, Norristown, Chester, Phoenixville,
West Norriton, Coatesville, Yeadon, Westtown, Downingtown,
Conshohocken, Folcroft, Swarthmore, Kennett Square, Royersford,
Narberth and Parkesburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
&&
LAT...LON 4004 7593 4011 7594 4015 7585 4020 7555
4001 7505 3996 7513 3989 7514 3985 7525
3985 7533 3980 7541 3984 7550 3984 7559
3980 7571 3998 7598
TIME...MOT...LOC 2124Z 292DEG 45KT 4012 7557 4007 7592
HAIL...1.00IN
WIND...60MPH
$$
Iovino2 follow-up statements
075
WWUS51 KPHI 262149
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
549 PM EDT Sun May 26 2019
PAC029-045-091-101-262215-
/O.CON.KPHI.SV.W.0048.000000T0000Z-190526T2215Z/
Montgomery PA-Chester PA-Philadelphia PA-Delaware PA-
549 PM EDT Sun May 26 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHWESTERN MONTGOMERY...EASTERN CHESTER...PHILADELPHIA AND
DELAWARE COUNTIES...
At 548 PM EDT, severe thunderstorms were located along a line
extending from near King Of Prussia to near West Chester, moving
southeast at 45 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Philadelphia, West Chester, Norristown, Chester, Phoenixville, West
Norriton, Yeadon, Westtown, Downingtown, Conshohocken, Folcroft,
Swarthmore, Kennett Square, Royersford, Narberth, East Lansdowne and
Elam.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4006 7572 4020 7555 4001 7505 3996 7513
3989 7514 3985 7525 3985 7533 3980 7541
3984 7550 3984 7559 3980 7571 3990 7585
TIME...MOT...LOC 2148Z 295DEG 40KT 4006 7542 3991 7562
HAIL...1.00IN
WIND...60MPH
$$
Iovino595
WWUS51 KPHI 262155
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
555 PM EDT Sun May 26 2019
PAC029-045-091-101-262204-
/O.CAN.KPHI.SV.W.0048.000000T0000Z-190526T2215Z/
Montgomery PA-Chester PA-Philadelphia PA-Delaware PA-
555 PM EDT Sun May 26 2019
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MONTGOMERY...
EASTERN CHESTER...PHILADELPHIA AND DELAWARE COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened considerably,
and no longer pose a threat to life or property. Therefore, the
warning has been cancelled.
LAT...LON 4006 7572 4020 7555 4001 7505 3996 7513
3989 7514 3985 7525 3985 7533 3980 7541
3984 7550 3984 7559 3980 7571 3990 7585
TIME...MOT...LOC 2150Z 292DEG 45KT 4007 7545 3992 7565
$$
IovinoNearby
Severe Thunderstorm Warnings in Pennsylvania, 2019Every severe thunderstorm warning in 2019
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.