Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 55, NWS Philadelphia/Mount Holly

May 22, 2022Chester County, Delaware County, Pennsylvania; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 22, 2022, 5:55 PM EDT for Chester County, Delaware County, Pennsylvania; New Castle County, Delaware. It was in force for 41 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 22, 2022, 5:55 PM EDT (21:55 UTC)
Expired: May 22, 2022, 6:36 PM EDT
In force: 41 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties New Castle County, DE, Chester County, PA, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 109 km from the middle of the area, began a volume at 21:55 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 22, 1:53 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.9 hours before the alert went out and 176 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 212 J/kg
Mixed-layer CIN: -211 J/kg
Mixed-layer LCL: 1294 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

163 
WUUS51 KPHI 222155
SVRPHI
DEC003-PAC029-045-222300-
/O.NEW.KPHI.SV.W.0055.220522T2155Z-220522T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
555 PM EDT Sun May 22 2022

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern New Castle County in northern Delaware...
  Southern Chester County in southeastern Pennsylvania...
  Southern Delaware County in southeastern Pennsylvania...

* Until 700 PM EDT.

* At 554 PM EDT, severe thunderstorms were located along a line
  extending from Gradyville to near Elam to Farmington, 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...
  Wilmington, Newark, West Chester, Chester, Westtown, Folcroft,
  Swarthmore, Elsmere, Kennett Square, New Castle, Oxford, West
  Grove, Newport, Arden, Glen Roy, Darby Township, Stanton, Cheyney,
  Glasgow and Talleyville.

This includes the following highways...
 Interstate 95 in Pennsylvania between mile markers 0 and 10.
 Interstate 95 in Delaware between mile markers 1 and 23.
 Interstate 476 in Pennsylvania between mile markers 0 and 3.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 3999 7569 3990 7526 3987 7526 3987 7521
      3984 7536 3961 7564 3954 7578 3972 7579
      3973 7610 3974 7610 3973 7612
TIME...MOT...LOC 2154Z 263DEG 35KT 3994 7548 3985 7558 3968 7601 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Davis

3 follow-up statements

237 
WWUS51 KPHI 222217
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
617 PM EDT Sun May 22 2022

DEC003-PAC029-045-222300-
/O.CON.KPHI.SV.W.0055.000000T0000Z-220522T2300Z/
New Castle DE-Chester PA-Delaware PA-
617 PM EDT Sun May 22 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHERN NEW CASTLE...SOUTHEASTERN CHESTER AND SOUTHERN DELAWARE
COUNTIES...

At 617 PM EDT, severe thunderstorms were located along a line
extending from near Roxborough to Philadelphia International Arpt to
near Newark, 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...
Wilmington, Newark, Chester, Westtown, Folcroft, Swarthmore, Elsmere,
Kennett Square, New Castle, Newport, Arden, Darby Township, Stanton,
Cheyney, Glasgow, Talleyville, Elam, Chelsea, Greenville and
Landenberg.

This includes the following highways...
 Interstate 95 in Pennsylvania between mile markers 0 and 11.
 Interstate 95 in Delaware between mile markers 1 and 23.
 Interstate 476 in Pennsylvania between mile markers 0 and 3.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3995 7552 3990 7526 3987 7525 3987 7521
      3984 7536 3961 7564 3954 7578 3972 7579
      3972 7592 3973 7592
TIME...MOT...LOC 2217Z 263DEG 35KT 3997 7521 3988 7531 3971 7574 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Davis

796 
WWUS51 KPHI 222227
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
627 PM EDT Sun May 22 2022

PAC029-045-222236-
/O.CAN.KPHI.SV.W.0055.000000T0000Z-220522T2300Z/
Chester PA-Delaware PA-
627 PM EDT Sun May 22 2022

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CHESTER AND
SOUTHERN DELAWARE COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northern Delaware...southern New Jersey...and southeastern
Pennsylvania.

LAT...LON 3973 7577 3977 7575 3981 7570 3983 7564
      3984 7554 3983 7548 3980 7541 3961 7564
      3954 7578 3971 7579
TIME...MOT...LOC 2226Z 263DEG 35KT 3998 7512 3989 7522 3972 7565 

$$

DEC003-222300-
/O.CON.KPHI.SV.W.0055.000000T0000Z-220522T2300Z/
New Castle DE-
627 PM EDT Sun May 22 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHERN NEW CASTLE COUNTY...

At 626 PM EDT, severe thunderstorms were located along a line
extending from Kensington to South Philadelphia to Stanton, 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...
Wilmington, Newark, Elsmere, New Castle, Newport, Arden, Greenville,
Stanton, North Star, Glasgow, Bear, Talleyville, Wilmington Manor,
Pike Creek, Hockessin, Ashland, Bellefonte, Ardentown, Ardencroft and
Edgemoor.

This includes Interstate 95 in Delaware between mile markers 1 and
23.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3973 7577 3977 7575 3981 7570 3983 7564
      3984 7554 3983 7548 3980 7541 3961 7564
      3954 7578 3971 7579
TIME...MOT...LOC 2226Z 263DEG 35KT 3998 7512 3989 7522 3972 7565 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Davis

914 
WWUS51 KPHI 222236
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
636 PM EDT Sun May 22 2022

DEC003-222246-
/O.CAN.KPHI.SV.W.0055.000000T0000Z-220522T2300Z/
New Castle DE-
636 PM EDT Sun May 22 2022

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN NEW CASTLE COUNTY IS
CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northern Delaware...southern New Jersey...and southeastern
Pennsylvania.

LAT...LON 3973 7577 3977 7575 3981 7570 3983 7564
      3984 7554 3983 7548 3980 7541 3961 7564
      3954 7578 3971 7579
TIME...MOT...LOC 2232Z 263DEG 35KT 3999 7504 3990 7514 3973 7557 

$$

Davis

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 22, 4:08 PM EDT	Severe Thunderstorm Warning	PHI	Berks	52 min
May 22, 4:34 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	56 min
May 22, 5:02 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	58 min
May 22, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	52 min
May 22, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	30 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2022 Severe Thunderstorm Warnings in Delaware, 2022 Every 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.