Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2022
Severe Thunderstorm Warning 35, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 20, 2022, 1:45 PM EDT for Berks County, Chester County, Montgomery County, Pennsylvania. It was in force for 45 min. 7 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 20, 2022, 1:45 PM EDT (17:45 UTC)
- Expired
- May 20, 2022, 2:30 PM EDT
- In force
- 45 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Berks County, PA, Chester County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 133 km from the middle of the area, began a volume at 17:48 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 20, 1:55 PM EDT | HAIL 0.7 | 2 Sw Reading Regional A, PA | |
| May 20, 2:00 PM EDT | TSTM WND DMG | 2 Nw Robeson Twp, PA | SEVERAL LARGE TREE BRANCHES DOWN. TIME ESTIMATED FROM RADAR. |
| May 20, 2:06 PM EDT | HAIL 1 | 2 Sw Lorane, PA | HAIL KNOCKED DOWN BRANCHES AND LEAVES FROM TREES. TIME ESTIMATED FROM RADAR. |
| May 20, 2:19 PM EDT | HAIL 0.25 | 1 Ese Amity Gardens, PA | |
| May 20, 2:20 PM EDT | HAIL 0.25 | 1 Wsw Colebrookdale Twp, PA | |
| May 20, 2:33 PM EDT | HAIL 1 | Boyertown, PA | ESTIMATED 55 MPH WIND GUST REPORTED AS WELL. |
| May 20, 2:33 PM EDT | HAIL 1 | Boyertown, PA |
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 20, 11:35 AM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 5.8 hours before the alert went out and 193 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
- 1 J/kg
- Mixed-layer CIN
- -226 J/kg
- Mixed-layer LCL
- 1469 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted.
643
WUUS51 KPHI 201745
SVRPHI
PAC011-029-091-201830-
/O.NEW.KPHI.SV.W.0035.220520T1745Z-220520T1830Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
145 PM EDT Fri May 20 2022
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Berks County in eastern Pennsylvania...
Northwestern Montgomery County in southeastern Pennsylvania...
North central Chester County in southeastern Pennsylvania...
* Until 230 PM EDT.
* At 145 PM EDT, severe thunderstorms were located along a line
extending from near Denver to near Adamstown to Churchtown, moving
northeast at 35 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Reading, Pottstown, Wyomissing, Birdsboro, Sinking Spring,
Laureldale, Wernersville, Robesonia, Honey Brook, Elverson,
Bechtelsville, New Morgan, Spring Ridge, Pughtown, Glenmoore,
Gilbertsville, Cedarville, Stowe, Shillington and West Reading.
This includes the following highways...
Pennsylvania Turnpike between mile markers 296 and 307.
Interstate 176 in Pennsylvania between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 700 PM EDT for eastern and
southeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.
A Tornado Watch remains in effect until 700 PM EDT for eastern and
southeastern Pennsylvania.
&&
LAT...LON 4041 7600 4038 7559 4014 7557 4004 7593
4011 7594 4014 7588 4033 7617 4034 7616
TIME...MOT...LOC 1745Z 243DEG 29KT 4026 7617 4023 7600 4016 7595
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS3 follow-up statements
825
WWUS51 KPHI 201759
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
159 PM EDT Fri May 20 2022
PAC011-029-091-201830-
/O.CON.KPHI.SV.W.0035.000000T0000Z-220520T1830Z/
Berks PA-Montgomery PA-Chester PA-
159 PM EDT Fri May 20 2022
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR SOUTHEASTERN BERKS...NORTHWESTERN MONTGOMERY AND NORTH CENTRAL
CHESTER COUNTIES...
At 158 PM EDT, severe thunderstorms were located along a line
extending from Sinking Spring to Elverson, moving east at 30 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Reading, Pottstown, Wyomissing, Birdsboro, Sinking Spring,
Laureldale, Wernersville, Elverson, Bechtelsville, New Morgan, Spring
Ridge, Pughtown, Gilbertsville, Cedarville, Stowe, Shillington, West
Reading, Boyertown, Mount Penn and Mohnton.
This includes the following highways...
Pennsylvania Turnpike between mile markers 296 and 302.
Interstate 176 in Pennsylvania between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 700 PM EDT for eastern and
southeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.
&&
LAT...LON 4016 7557 4014 7588 4034 7614 4041 7598
4038 7559
TIME...MOT...LOC 1758Z 249DEG 27KT 4031 7602 4016 7585
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS400
WWUS51 KPHI 201807
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
207 PM EDT Fri May 20 2022
PAC011-029-091-201830-
/O.CON.KPHI.SV.W.0035.000000T0000Z-220520T1830Z/
Berks PA-Montgomery PA-Chester PA-
207 PM EDT Fri May 20 2022
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR SOUTHEASTERN BERKS...WEST CENTRAL MONTGOMERY AND NORTH CENTRAL
CHESTER COUNTIES...
At 207 PM EDT, severe thunderstorms were located along a line
extending from near Reading to Elverson, moving east at 20 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Reading, Pottstown, Wyomissing, Birdsboro, Elverson, Bechtelsville,
New Morgan, Pughtown, Gilbertsville, Cedarville, Stowe, Shillington,
West Reading, Boyertown, Mount Penn, Mohnton, Kenhorst, St. Lawrence,
Pottsgrove and Lorane.
This includes the following highways...
Pennsylvania Turnpike between mile markers 296 and 302.
Interstate 176 in Pennsylvania between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 700 PM EDT for eastern and
southeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Mount Holly NJ.
&&
LAT...LON 4038 7563 4031 7558 4016 7557 4014 7588
4016 7591 4029 7601 4040 7586
TIME...MOT...LOC 1807Z 249DEG 16KT 4029 7593 4018 7584
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MPS339
WWUS51 KPHI 201824
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
224 PM EDT Fri May 20 2022
PAC011-029-091-201833-
/O.EXP.KPHI.SV.W.0035.000000T0000Z-220520T1830Z/
Berks PA-Montgomery PA-Chester PA-
224 PM EDT Fri May 20 2022
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS...WEST
CENTRAL MONTGOMERY AND NORTH CENTRAL CHESTER COUNTIES WILL EXPIRE AT
230 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However small hail
and gusty winds are still possible with these thunderstorms.
A Tornado Watch remains in effect until 700 PM EDT for eastern and
southeastern Pennsylvania.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
A new Severe Thunderstorm Warning is in effect for portions of
Berks, Montgomery, and Chester counties until 315 pm EDT.
LAT...LON 4038 7563 4031 7558 4016 7557 4014 7588
4016 7591 4029 7601 4040 7586
TIME...MOT...LOC 1823Z 243DEG 29KT 4034 7580 4023 7571
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 3:15 AM EDT | Heat Advisory | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 59 hr |
| May 20, 2:22 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 53 min |
| May 20, 2:27 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 48 min |
| May 20, 2:30 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 45 min |
| May 20, 2:53 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Montgomery | 52 min |
| May 20, 3:00 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 31 min |
| May 20, 3:05 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 29 min |
| May 20, 3:10 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 50 min |
| May 20, 3:25 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 50 min |
| May 20, 3:28 PM EDT | Special Weather Statement | PHI | Philadelphia | 32 min |
| May 20, 3:37 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 53 min |
| May 20, 3:41 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Montgomery, Northampton | 49 min |
| May 20, 3:52 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Delaware, Lehigh, Montgomery, Philadelphia | 3 hr |
| May 20, 3:55 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more | 3 hr |
| May 20, 4:26 PM EDT | Areal Flood Advisory | PHI | Bucks, Philadelphia | 3 hr |
| May 20, 5:37 PM EDT | Areal Flood Warning | PHI | Bucks, Montgomery | 68 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2022Every severe thunderstorm warning in 2022
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.