Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 154, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 29, 2019, 3:09 PM EDT for Chester County, Pennsylvania. It was in force for 51 min. 19 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 29, 2019, 3:09 PM EDT (19:09 UTC)
- Expired
- Jun 29, 2019, 4:00 PM EDT
- In force
- 51 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Chester County, PA
The radar
The Philadelphia radar (KDIX), 123 km from the middle of the area, began a volume at 19:08 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 29, 3:24 PM EDT | TSTM WND DMG | 2 Ne West Sadsbury Twp, PA | DOWNED TREE BLOCKING THE ROADWAY AT THE INTERSECTION OF SANDY HILL ROAD AND TYLER DRIVE. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:26 PM EDT | TSTM WND DMG | 1 Nnw Sadsburyville, PA | DOWNED TREE NEAR THE INTERSECTION OF AIRPORT ROAD AND ASH ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:26 PM EDT | TSTM WND DMG | 1 Sw West Brandywine Tw, PA | DOWNED TREE ON CEDAR KNOLL ROAD IN WEST CALN TWP. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:26 PM EDT | TSTM WND DMG | 2 W West Caln Twp, PA | DOWNED TREE BLOCKING THE ROADWAY AT THE INTERSECTION OF KINGS HIGHWAY AND ASH ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:29 PM EDT | TSTM WND DMG | 1 Sse Parkesburg, PA | DOWNED TREE NEAR THE INTERSECTION OF LIMESTONE ROAD AND OLD RACETRACK ROAD. TIME ESTIMATED FROM RADAR.. |
| Jun 29, 3:31 PM EDT | TSTM WND DMG | 1 Sse Atglen, PA | DOWNED TREES AND POWER LINES ON AND NEAR FALLOWFIELD ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:31 PM EDT | HAIL 1 | Wagontown, PA | |
| Jun 29, 3:33 PM EDT | TSTM WND DMG | 1 S West Brandywine Twp, PA | DOWNED TREE BLOCKING MONACY ROAD NEAR MANOR ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:33 PM EDT | HAIL 1 | Coatesville, PA | TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:37 PM EDT | TSTM WND DMG | 1 Se Atglen, PA | DOWNED TREE ON GAP NEWPORT PIKE NEAR GLEN RUN ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:41 PM EDT | TSTM WND DMG | 2 S Parkesburg, PA | DOWNED TREE BLOCKING LIMESTONE ROAD NEAR HIGHLAND ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:47 PM EDT | TSTM WND DMG | East Fallowfield Twp, PA | DOWNED TREE NEAR THE INTERSECTION OF STRASBURG ROAD AND YOUNGSBURG ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:51 PM EDT | TSTM WND DMG | 1 Nnw East Caln Twp, PA | DOWNED TREE NEAR THE INTERSECTION OF WILLIAM SALESBURY DRIVE AND HICKORY DRIVE. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:51 PM EDT | TSTM WND DMG | Coatesville, PA | CORRECTS PREVIOUS TSTM WND DMG REPORT FROM COATESVILLE. PHOTO OF A LARGE TREE DOWN. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:52 PM EDT | HAIL 0.25 | 2 N Coatesville, PA | |
| Jun 29, 3:54 PM EDT | TSTM WND DMG | 3 Nnw East Caln Twp, PA | DOWNED TREE BLOCKING DORIAN MILL ROAD NEAR ROBERT DEAN DRIVE. TIME ESTIMATED FROM RADAR. |
| Jun 29, 3:58 PM EDT | TSTM WND DMG | 1 Nnw East Caln Twp, PA | DOWNED TREE NEAR THE INTERSECTION OF WOODLAND DRIVE AND SANTILLO WAY. TIME ESTIMATED FROM RADAR. |
| Jun 29, 4:05 PM EDT | TSTM WND DMG | Landenberg, PA | TREES DOWN. TIME ESTIMATED FROM RADAR. |
| Jun 29, 4:08 PM EDT | TSTM WND DMG | 1 Ssw Kennett Square, PA | DOWNED TREE NEAR THE INTERSECTION OF ORIOLE DRIVE AND CHANDLER MILL ROAD. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 29, 12:08 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.2 hours before the alert went out and 174 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
- 927 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 1390 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
797
WUUS51 KPHI 291909 RRA
SVRPHI
PAC029-292000-
/O.NEW.KPHI.SV.W.0154.190629T1909Z-190629T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
309 PM EDT Sat Jun 29 2019
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Chester County in southeastern Pennsylvania...
* Until 400 PM EDT.
* At 309 PM EDT, severe thunderstorms were located along a line
extending from near Honey Brook to near Cochranville, moving east
at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Coatesville, Downingtown, Kennett Square, Parkesburg, West Grove,
Honey Brook, Cochranville, Marshallton, Ladenberg,
Lionville-Marchwood, Atglen, South Coatesville, Avondale, Modena,
Thorndale and Toughkenamon.
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.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4004 7593 4011 7594 4007 7565 3986 7567
3977 7576 3981 7592 3997 7599
TIME...MOT...LOC 1909Z 279DEG 25KT 4005 7595 3987 7587
HAIL...0.75IN
WIND...60MPH
$$
CMS1 follow-up statement
256
WWUS51 KPHI 291930
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
330 PM EDT Sat Jun 29 2019
PAC029-292000-
/O.CON.KPHI.SV.W.0154.000000T0000Z-190629T2000Z/
Chester PA-
330 PM EDT Sat Jun 29 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR CENTRAL CHESTER COUNTY...
At 330 PM EDT, a severe thunderstorm was located over Coatesville, or
13 miles southeast of New Holland, moving southeast at 15 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Coatesville, Downingtown, Parkesburg, Honey Brook, Marshallton,
Lionville-Marchwood, South Coatesville, Modena and Thorndale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4004 7593 4011 7594 4007 7565 3986 7567
3993 7587 3997 7599
TIME...MOT...LOC 1930Z 323DEG 15KT 3999 7587
HAIL...1.25IN
WIND...60MPH
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 2:27 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 63 min |
| Jun 29, 2:46 PM EDT | Special Weather Statement | PHI | Chester | 29 min |
| Jun 29, 3:06 PM EDT | Special Weather Statement | PHI | Chester | 24 min |
| Jun 29, 3:20 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery, Northampton | 55 min |
| Jun 29, 3:24 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 36 min |
| Jun 29, 3:27 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 53 min |
| Jun 29, 3:45 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Jun 29, 3:52 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 53 min |
| Jun 29, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 49 min |
| Jun 29, 3:59 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 46 min |
| Jun 29, 4:00 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 3 hr |
| Jun 29, 4:17 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Northampton | 3 hr |
| Jun 29, 4:28 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 47 min |
| Jun 29, 4:41 PM EDT | Areal Flood Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 3 hr |
| Jun 29, 7:10 PM EDT | Special Weather Statement | PHI | Berks | 35 min |
| Jun 29, 7:16 PM EDT | Special Weather Statement | PHI | Lebanon | 29 min |
Nearby
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.