Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 41, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 3, 2021, 5:14 PM EDT for Berks County, Chester County, Pennsylvania. It was in force for 27 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
- Jun 3, 2021, 5:14 PM EDT (21:14 UTC)
- Expired
- Jun 3, 2021, 5:41 PM EDT
- In force
- 27 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Berks County, PA, Chester County, PA
The radar
The Philadelphia radar (KDIX), 119 km from the middle of the area, began a volume at 21:18 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 3, 5:18 PM EDT | TSTM WND DMG | 3 Ene New Morgan, PA | A FEW REPORTS OF TREE LIMBS AND POWER LINES DOWN NORTH AND NORTHEAST OF NEW MORGAN. 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 3, 2:48 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.2 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
- 73 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 511 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
600
WUUS51 KPHI 032114
SVRPHI
PAC011-029-032200-
/O.NEW.KPHI.SV.W.0041.210603T2114Z-210603T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
514 PM EDT Thu Jun 3 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Berks County in eastern Pennsylvania...
North central Chester County in southeastern Pennsylvania...
* Until 600 PM EDT.
* At 513 PM EDT, a severe thunderstorm was located near Elverson, or
12 miles east of New Holland, moving east at 20 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...
Honey Brook, Elverson, New Morgan, Glenmoore, Chester Springs,
Pughtown, Lionville, Cedarville, Lionville-Marchwood, Stowe, South
Pottstown, Kenilworth and Exton.
This includes the following highways...
Pennsylvania Turnpike between mile markers 296 and 316.
Interstate 176 in Pennsylvania between mile markers 1 and 2.
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 4014 7588 4018 7593 4026 7569 4024 7569
4024 7565 4023 7563 4003 7557 4005 7593
4011 7594
TIME...MOT...LOC 2113Z 257DEG 16KT 4011 7585
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$
Davis2 follow-up statements
837
WWUS51 KPHI 032126
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
526 PM EDT Thu Jun 3 2021
PAC011-029-032200-
/O.CON.KPHI.SV.W.0041.000000T0000Z-210603T2200Z/
Berks PA-Chester PA-
526 PM EDT Thu Jun 3 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHEASTERN BERKS AND NORTH CENTRAL CHESTER COUNTIES...
At 526 PM EDT, a severe thunderstorm was located over Glenmoore, or
14 miles northwest of West Chester, moving east at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Elverson, New Morgan, Pughtown, Lionville, Glenmoore, Cedarville,
Lionville-Marchwood, Chester Springs, Stowe, Kenilworth, South
Pottstown and Exton.
This includes Pennsylvania Turnpike between mile markers 300 and 316.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4015 7587 4020 7588 4026 7569 4024 7569
4024 7565 4023 7563 4003 7557 4007 7586
TIME...MOT...LOC 2126Z 257DEG 16KT 4012 7577
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$
Davis480
WWUS51 KPHI 032141
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
541 PM EDT Thu Jun 3 2021
PAC011-029-032150-
/O.CAN.KPHI.SV.W.0041.000000T0000Z-210603T2200Z/
Berks PA-Chester PA-
541 PM EDT Thu Jun 3 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS AND NORTH
CENTRAL CHESTER COUNTIES IS CANCELLED...
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 has been cancelled. However, 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 4015 7587 4020 7588 4026 7569 4024 7569
4024 7565 4023 7563 4003 7557 4007 7586
TIME...MOT...LOC 2139Z 257DEG 16KT 4013 7569
$$
DavisThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 3, 9:37 AM EDT | Flash Flood Watch | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 12 hr |
| Jun 3, 3:02 PM EDT | Special Weather Statement | PHI | Berks | 43 min |
| Jun 3, 3:54 PM EDT | Special Weather Statement | PHI | Berks | 36 min |
| Jun 3, 5:20 PM EDT | Areal Flood Advisory | PHI | Berks, Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Jun 3, 5:59 PM EDT | Flash Flood Warning | PHI | Berks, Chester | 108 min |
| Jun 3, 6:19 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Montgomery | 115 min |
| Jun 3, 7:09 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 2 hr |
| Jun 3, 7:13 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery, Philadelphia | 3 hr |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2021Every severe thunderstorm warning in 2021
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.