Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2022
Severe Thunderstorm Warning 42, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 20, 2022, 3:10 PM EDT for 5 counties in Pennsylvania. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 20, 2022, 3:10 PM EDT (19:10 UTC)
- Expired
- May 20, 2022, 4:00 PM EDT
- In force
- 50 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Berks County, PA, Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 123 km from the middle of the area, began a volume at 19:11 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.
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, 7.2 hours before the alert went out and 196 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.
658
WUUS51 KPHI 201910
SVRPHI
PAC011-017-029-077-091-202000-
/O.NEW.KPHI.SV.W.0042.220520T1910Z-220520T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
310 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...
Southeastern Lehigh County in eastern Pennsylvania...
Northwestern Montgomery County in southeastern Pennsylvania...
West central Bucks County in southeastern Pennsylvania...
Northern Chester County in southeastern Pennsylvania...
* Until 400 PM EDT.
* At 310 PM EDT, severe thunderstorms were located along a line
extending from Laureldale to near Terre Hill to near Gap, moving
east at 35 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, Pottstown, Phoenixville, Coatesville, Wyomissing,
Downingtown, Birdsboro, Collegeville, Royersford, Sinking Spring,
Laureldale, Trappe, East Greenville, Honey Brook, Schwenksville,
Elverson, Bally, Bechtelsville, Green Lane and New Morgan.
This includes the following highways...
Pennsylvania Turnpike between mile markers 296 and 321.
Northeast Extension between mile markers 35 and 51.
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.
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
A Tornado Watch remains in effect until 700 PM EDT for eastern and
southeastern Pennsylvania.
&&
LAT...LON 4038 7600 4054 7542 4035 7535 4001 7553
3998 7598 4004 7593 4011 7594 4014 7588
4025 7605
TIME...MOT...LOC 1910Z 252DEG 31KT 4037 7589 4020 7600 4004 7602
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann2 follow-up statements
419
WWUS51 KPHI 201928
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
328 PM EDT Fri May 20 2022
PAC011-017-029-077-091-202000-
/O.CON.KPHI.SV.W.0042.000000T0000Z-220520T2000Z/
Berks PA-Lehigh PA-Montgomery PA-Bucks PA-Chester PA-
328 PM EDT Fri May 20 2022
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR SOUTHEASTERN BERKS...SOUTHEASTERN LEHIGH...NORTHWESTERN
MONTGOMERY...WEST CENTRAL BUCKS AND NORTHEASTERN CHESTER COUNTIES...
At 328 PM EDT, severe thunderstorms were located along a line
extending from near Zionsville to Pottstown to Glenmoore, moving east
at 45 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Pottstown, Phoenixville, Downingtown, Birdsboro, Collegeville,
Royersford, Trappe, East Greenville, Schwenksville, Elverson, Bally,
Bechtelsville, Green Lane, New Morgan, Zionsville, Pughtown, Spring
Mount, Lionville-Marchwood, Glenmoore and Chester Springs.
This includes the following highways...
Pennsylvania Turnpike between mile markers 299 and 321.
Northeast Extension between mile markers 35 and 50.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 700 PM EDT for eastern and
southeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4054 7542 4035 7535 4001 7553 4000 7575
4008 7587 4014 7588 4028 7586 4043 7580
TIME...MOT...LOC 1928Z 254DEG 38KT 4045 7553 4025 7562 4009 7575
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Staarmann273
WWUS51 KPHI 201947
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
347 PM EDT Fri May 20 2022
PAC011-201957-
/O.CAN.KPHI.SV.W.0042.000000T0000Z-220520T2000Z/
Berks PA-
347 PM EDT Fri May 20 2022
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 700 PM EDT for eastern and
southeastern Pennsylvania.
LAT...LON 4054 7542 4035 7535 4007 7550 4009 7559
4014 7560 4021 7554 4033 7549 4050 7555
TIME...MOT...LOC 1947Z 252DEG 31KT 4050 7534 4030 7543 4014 7556
$$
PAC017-029-077-091-202000-
/O.CON.KPHI.SV.W.0042.000000T0000Z-220520T2000Z/
Lehigh PA-Montgomery PA-Bucks PA-Chester PA-
347 PM EDT Fri May 20 2022
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR SOUTHEASTERN LEHIGH...NORTHWESTERN MONTGOMERY...WEST CENTRAL
BUCKS AND NORTHEASTERN CHESTER COUNTIES...
At 347 PM EDT, severe thunderstorms were located along a line
extending from near Pleasant Valley to near Spring Mount to near
Phoenixville, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Phoenixville, Collegeville, Royersford, Trappe, East Greenville,
Schwenksville, Green Lane, Zionsville, Geryville, Spring Mount,
Skippack, Pennsburg, Spring City, Red Hill, Trumbauersville,
Harleysville and Evansburg.
This includes the following highways...
Pennsylvania Turnpike near mile marker 321.
Northeast Extension between mile markers 35 and 50.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 700 PM EDT for eastern and
southeastern Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4054 7542 4035 7535 4007 7550 4009 7559
4014 7560 4021 7554 4033 7549 4050 7555
TIME...MOT...LOC 1947Z 252DEG 31KT 4050 7534 4030 7543 4014 7556
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
StaarmannThe 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, 1:45 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 45 min |
| 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, 3:25 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.