Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 45, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 29, 2020, 3:51 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 54 min. 1 report 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, 2020, 3:51 PM EDT (19:51 UTC)
- Expired
- May 29, 2020, 4:45 PM EDT
- In force
- 54 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Berks County, PA, Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 151 km from the middle of the area, began a volume at 19:53 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, 4:10 PM EDT | TSTM WND GST 65 | 1 Ne Bethel, PA | SPOTTER ESTIMATES 60-70 MPH WINDS AT THE TRI-COUNTY WORSHIP CENTER. |
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, 2:25 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.9 hours before the alert went out and 206 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
- 648 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 701 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.9
The text
As transmitted.
009
WUUS51 KPHI 291951
SVRPHI
PAC011-077-292045-
/O.NEW.KPHI.SV.W.0045.200529T1951Z-200529T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
351 PM EDT Fri May 29 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Berks County in eastern Pennsylvania...
Western Lehigh County in eastern Pennsylvania...
* Until 445 PM EDT.
* At 350 PM EDT, a severe thunderstorm was located over Myerstown,
moving east 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...
Reading, Wyomissing, Kutztown, Hamburg, Fleetwood, Sinking Spring,
Laureldale, Womelsdorf, Wernersville, Topton, Robesonia, Leesport,
Shoemakersville, Bally, Bernville, Bechtelsville, Lyons,
Strausstown, Lenhartsville and Spring Ridge.
This includes the following highways...
Interstate 78 in Pennsylvania between mile markers 10 and 48.
Interstate 176 in Pennsylvania between mile markers 9 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4052 7634 4052 7625 4058 7605 4057 7602
4065 7598 4070 7583 4073 7576 4041 7556
4031 7564 4026 7589 4029 7612 4036 7621
4037 7623 4049 7643
TIME...MOT...LOC 1950Z 248DEG 38KT 4039 7635
HAIL...1.00IN
WIND...60MPH
$$
Davis2 follow-up statements
404
WWUS51 KPHI 292017
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
417 PM EDT Fri May 29 2020
PAC011-077-292045-
/O.CON.KPHI.SV.W.0045.000000T0000Z-200529T2045Z/
Berks PA-Lehigh PA-
417 PM EDT Fri May 29 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR BERKS AND WESTERN LEHIGH COUNTIES...
At 414 PM EDT, a severe thunderstorm was located near
Shoemakersville, or 11 miles northwest of Reading, moving east at 45
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotter reports 60 mph wind gusts in Bethel
Township, Pennsylvania.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Reading, Wyomissing, Kutztown, Hamburg, Fleetwood, Sinking Spring,
Laureldale, Womelsdorf, Wernersville, Topton, Robesonia, Leesport,
Shoemakersville, Bally, Bernville, Bechtelsville, Lyons, Strausstown,
Lenhartsville and Spring Ridge.
This includes the following highways...
Interstate 78 in Pennsylvania between mile markers 10 and 48.
Interstate 176 in Pennsylvania between mile markers 9 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4052 7625 4058 7605 4057 7602 4065 7598
4070 7583 4073 7576 4041 7556 4031 7564
4026 7589 4029 7612 4036 7621 4037 7623
4049 7643 4052 7635
TIME...MOT...LOC 2014Z 248DEG 38KT 4049 7603
HAIL...1.00IN
WIND...60MPH
$$
Davis471
WWUS51 KPHI 292037
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
437 PM EDT Fri May 29 2020
PAC011-077-292046-
/O.EXP.KPHI.SV.W.0045.000000T0000Z-200529T2045Z/
Berks PA-Lehigh PA-
437 PM EDT Fri May 29 2020
...THE SEVERE THUNDERSTORM WARNING FOR BERKS AND WESTERN LEHIGH
COUNTIES WILL EXPIRE AT 445 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
eastern and southeastern Pennsylvania.
LAT...LON 4052 7625 4058 7605 4057 7602 4065 7598
4070 7583 4073 7576 4041 7556 4031 7564
4026 7589 4029 7612 4036 7621 4037 7623
4049 7643 4052 7635
TIME...MOT...LOC 2036Z 248DEG 38KT 4058 7575
$$
DavisThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 3:38 PM EDT | Special Weather Statement | PHI | Carbon | 82 min |
| May 29, 4:01 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 3 hr |
| May 29, 4:18 PM EDT | Areal Flood Advisory | PHI | Carbon | 2 hr |
| May 29, 4:46 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Monroe, Northampton | 115 min |
| May 29, 4:54 PM EDT | Special Weather Statement | PHI | Berks, Lehigh, Monroe, Northampton | 66 min |
| May 29, 5:03 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 57 min |
| May 29, 5:18 PM EDT | Areal Flood Advisory | PHI | Berks, Chester | 3 hr |
| May 29, 6:46 PM EDT | Special Weather Statement | PHI | Chester | 29 min |
| May 29, 7:19 PM EDT | Special Weather Statement | PHI | Chester | 41 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2020Every severe thunderstorm warning in 2020
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.