Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 89, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 29, 2019, 4:18 PM EDT for 6 counties in Pennsylvania. It was in force for 42 min. 16 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
- May 29, 2019, 4:18 PM EDT (20:18 UTC)
- Expired
- May 29, 2019, 5:00 PM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 70.0 mph
Counties Berks County, PA, Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 110 km from the middle of the area, began a volume at 20:21 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 |
|---|---|---|---|
| May 29, 4:18 PM EDT | TSTM WND DMG | 1 Sw Huffs Church, PA | DELAYED REPORT OF TREES AND POWER LINES DOWN ON LONG LANE IN HEREFORD TWP. TIME ESTIMATED FROM RADAR. |
| May 29, 4:18 PM EDT | TSTM WND DMG | 1 Wsw Huffs Church, PA | DELAYED REPORT. SEVERAL REPORTS OF TREES DOWN ON CONRAD ROAD IN DISTRICT TWP. TIME ESTIMATED FROM RADAR. |
| May 29, 4:32 PM EDT | TSTM WND DMG | 2 Nnw Geryville, PA | DOWNED TREE ON WIRES ON VERA CRUZ RD. TIME ESTIMATED FROM RADAR. |
| May 29, 4:37 PM EDT | TSTM WND DMG | Earl Twp, PA | DELAYED REPORT. SEVERAL REPORTS OF TREES DOWN IN EARL TWP AND OLEY TWP, INCLUDING ON SHEEP HILL ROAD, PINE ROAD, AND SAW MILL ROAD IN EARL TWP AND MAIN STREET AND KAUFFMAN ROAD IN OLEY TWP. TIME ESTIMATED FROM RADAR. |
| May 29, 4:40 PM EDT | TSTM WND DMG | Douglass Twp, PA | DELAYED REPORT. SEVERAL REPORTS OF TREES AND WIRES DOWN IN DOUGLASS TWP, INCLUDING ON POPLAR ROAD, READING AVENUE, AND TROUT RUN ROAD. TIME ESTIMATED FROM RADAR. |
| May 29, 4:40 PM EDT | HAIL 1 | Boyertown, PA | DELAYED REPORT FROM WEDNESDAY. TIME ESTIMATED FROM RADAR. |
| May 29, 4:48 PM EDT | TSTM WND DMG | Perkasie, PA | AT LEAST ONE LARGE TREE DOWN. TIME ESTIMATED FROM RADAR. |
| May 29, 4:50 PM EDT | HAIL 0.25 | Boyertown, PA | |
| May 29, 4:55 PM EDT | TSTM WND DMG | 1 Se Green Lane, PA | NUMEROUS TREES DOWN. TIME ESTIMATED FROM RADAR. |
| May 29, 4:55 PM EDT | TSTM WND DMG | 3 W Lower Frederick Twp, PA | NEIFFER RD CLOSED FROM RTE 73 TO RIDGE PIKE DUE TO DOWNED TREES. TIME ESTIMATED FROM RADAR. |
| May 29, 4:55 PM EDT | TSTM WND DMG | Green Lane, PA | REPORT OF TREES DOWN. TIME ESTIMATED FROM RADAR. |
| May 29, 4:55 PM EDT | TSTM WND DMG | Perkiomenville, PA | MULTIPLE REPORTS OF SEVERAL TREES UPROOTED OR SNAPPED. TIME ESTIMATED FROM RADAR. |
| May 29, 4:55 PM EDT | TSTM WND DMG | Perkiomenville, PA | SEVERAL TREES AND POWER LINES DOWN. TIME ESTIMATED FROM RADAR. |
| May 29, 4:56 PM EDT | TSTM WND GST 55 | 1 N Green Lane, PA | |
| May 29, 4:56 PM EDT | HAIL 1 | Green Lane, PA | |
| May 29, 5:00 PM EDT | TSTM WND DMG | Upper Salford Twp, PA | TREES DOWN IN WOXALL/UPPER SALFORD TWP. |
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 |
|---|---|---|---|
| May 29, 1:10 PM EDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.3 hours before the alert went out and 228 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
- 415 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -157 m²/s²
- 0-3 km storm-relative helicity
- -76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
442
WUUS51 KPHI 292018
SVRPHI
PAC011-017-029-077-091-095-292100-
/O.NEW.KPHI.SV.W.0089.190529T2018Z-190529T2100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
418 PM EDT Wed May 29 2019
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Eastern Berks County in eastern Pennsylvania...
Montgomery County in southeastern Pennsylvania...
Southeastern Lehigh County in eastern Pennsylvania...
Northwestern Bucks County in southeastern Pennsylvania...
Northeastern Chester County in southeastern Pennsylvania...
South central Northampton County in eastern Pennsylvania...
* Until 500 PM EDT.
* At 417 PM EDT, a severe thunderstorm was located over Laureldale,
or near Reading, moving east at 40 mph.
HAZARD...70 mph wind gusts and ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Allentown, Bethlehem, Pottstown, Lansdale, East Norriton, Emmaus,
Quakertown, Perkasie, Doylestown, Souderton, Bedminster, Ambler,
Hellertown, Collegeville, Royersford, Chalfont, Trappe, Hatfield,
East Greenville and Dublin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A tornado watch remains in effect until 800 PM EDT for northwestern
New Jersey...and eastern and southeastern Pennsylvania.
A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a basement or small
interior room.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4062 7572 4065 7558 4055 7509 4013 7518
4021 7580
TIME...MOT...LOC 2017Z 277DEG 35KT 4037 7587
HAIL...1.50IN
WIND...70MPH
$$
IovinoThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 8:23 PM EDT | Tornado Warning | PHI | Monroe | 37 min |
| May 28, 9:17 PM EDT | River Flood Warning | PHI | Chester | 101 min |
| May 29, 3:18 AM EDT | Flash Flood Watch | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 18 hr |
| May 29, 2:19 PM EDT | Special Weather Statement | PHI | Lehigh | 41 min |
| May 29, 2:26 PM EDT | Special Weather Statement | PHI | Montgomery | 34 min |
| May 29, 2:30 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 60 min |
| May 29, 2:48 PM EDT | Special Weather Statement | PHI | Monroe | 27 min |
| May 29, 2:59 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 46 min |
| May 29, 3:10 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 65 min |
| May 29, 3:17 PM EDT | Tornado Warning | PHI | Bucks, Lehigh | 28 min |
| May 29, 3:29 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe, Northampton | 46 min |
| May 29, 3:29 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 46 min |
| May 29, 3:38 PM EDT | Tornado Warning | PHI | Bucks | 37 min |
| May 29, 3:43 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 4 hr |
| May 29, 3:43 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 62 min |
| May 29, 3:43 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 47 min |
| May 29, 4:04 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 41 min |
| May 29, 4:09 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 51 min |
| May 29, 4:13 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 47 min |
| May 29, 4:16 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 27 min |
| May 29, 4:27 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more | 51 min |
| May 29, 4:35 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 25 min |
| May 29, 4:42 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 48 min |
| May 29, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Chester, Lehigh, Montgomery, Northampton | 40 min |
| May 29, 4:53 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 67 min |
| May 29, 4:55 PM EDT | Flash Flood Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 4 hr |
| May 29, 5:08 PM EDT | Tornado Warning | PHI | Bucks, Montgomery | 27 min |
| May 29, 5:14 PM EDT | Flash Flood Warning | PHI | Berks, Bucks, Carbon, Lehigh, Monroe, Northampton | 3 hr |
| May 29, 5:23 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Monroe, Montgomery and 1 more | 34 min |
| May 29, 5:27 PM EDT | Flash Flood Warning | PHI | Bucks, Chester, Montgomery, Philadelphia | 4 hr |
| May 29, 5:33 PM EDT | Tornado Warning | PHI | Bucks | 27 min |
| May 29, 5:39 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 66 min |
| May 29, 5:49 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery, Philadelphia | 41 min |
| May 29, 6:06 PM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| May 29, 6:06 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 24 min |
| May 29, 6:22 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 53 min |
| May 29, 6:35 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| May 29, 7:12 PM EDT | Areal Flood Advisory | PHI | Chester | 3 hr |
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.