Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 113, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2024, 3:03 PM EDT for Chester County, Delaware County, Pennsylvania. It was in force for 42 min. 3 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
- Jul 14, 2024, 3:03 PM EDT (19:03 UTC)
- Expired
- Jul 14, 2024, 3:45 PM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Chester County, PA, Delaware County, PA
The radar
The Philadelphia radar (KDIX), 124 km from the middle of the area, began a volume at 19:02 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 |
|---|---|---|---|
| Jul 14, 3:07 PM EDT | TSTM WND DMG | Coatesville, PA | Reports of several trees and wires down around Coatesville. Time estimated. |
| Jul 14, 3:07 PM EDT | TSTM WND DMG | Downington, PA | Reports of several trees and wires down around Downingtown. Time estimated. |
| Jul 14, 3:15 PM EDT | HAIL 0.7 | Caln Twp, PA | Dime size hail in Caln Township. Time estimated from radar. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.1 hours before the alert went out and 175 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
- 940 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 1366 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
904
WUUS51 KPHI 141903
SVRPHI
PAC029-045-141945-
/O.NEW.KPHI.SV.W.0113.240714T1903Z-240714T1945Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
303 PM EDT Sun Jul 14 2024
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Chester County in southeastern Pennsylvania...
West central Delaware County in southeastern Pennsylvania...
* Until 345 PM EDT.
* At 303 PM EDT, a severe thunderstorm was located over Coatesville,
or 13 miles west of West Chester, moving east at 15 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...
West Chester, Coatesville, Downingtown, Kennett Square, Parkesburg,
Honey Brook, Marshallton, Glenmoore, Atglen, South Coatesville,
Modena, and Thorndale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4004 7593 4006 7594 4009 7591 4009 7575
3989 7552 3982 7566 3993 7599 3994 7598
3995 7600
TIME...MOT...LOC 1903Z 285DEG 14KT 3999 7585
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich2 follow-up statements
153
WWUS51 KPHI 141931
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
331 PM EDT Sun Jul 14 2024
PAC045-141940-
/O.CAN.KPHI.SV.W.0113.000000T0000Z-240714T1945Z/
Delaware PA-
331 PM EDT Sun Jul 14 2024
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL DELAWARE COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has weakened.
moved out of the warned area. Therefore, the warning has been
cancelled.
LAT...LON 3996 7599 4006 7577 3991 7556 3983 7570
3993 7599 3994 7598 3995 7600
TIME...MOT...LOC 1930Z 324DEG 11KT 3995 7581
$$
PAC029-141945-
/O.CON.KPHI.SV.W.0113.000000T0000Z-240714T1945Z/
Chester PA-
331 PM EDT Sun Jul 14 2024
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR CENTRAL CHESTER COUNTY...
At 330 PM EDT, a severe thunderstorm was located over Coatesville, or
10 miles west of West Chester, moving southeast at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated. At 3:05, several trees were reported down
within western and northern Chester County.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Coatesville, Downingtown, Kennett Square, Parkesburg, Marshallton,
Atglen, South Coatesville, Modena, and Thorndale.
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 3996 7599 4006 7577 3991 7556 3983 7570
3993 7599 3994 7598 3995 7600
TIME...MOT...LOC 1930Z 324DEG 11KT 3995 7581
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$
Hoeflich529
WWUS51 KPHI 141936
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
336 PM EDT Sun Jul 14 2024
PAC029-141946-
/O.EXP.KPHI.SV.W.0113.000000T0000Z-240714T1945Z/
Chester PA-
336 PM EDT Sun Jul 14 2024
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CHESTER COUNTY WILL
EXPIRE AT 345 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm.
Remember, a Severe Thunderstorm Warning still remains in effect for
portions of Chester County. Refer to that bulletin for the updated
information!
LAT...LON 3996 7599 4006 7577 3991 7556 3983 7570
3993 7599 3994 7598 3995 7600
TIME...MOT...LOC 1936Z 285DEG 14KT 3995 7579
$$
HoeflichThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 12:07 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 38 min |
| Jul 14, 12:44 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Montgomery | 46 min |
| Jul 14, 1:23 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 52 min |
| Jul 14, 2:19 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 41 min |
| Jul 14, 2:24 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 23 min |
| Jul 14, 2:52 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery | 38 min |
| Jul 14, 2:53 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Jul 14, 3:03 PM EDT | Excessive Heat Warning | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more | 3 days |
| Jul 14, 3:35 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 40 min |
| Jul 14, 3:44 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 46 min |
| Jul 14, 4:13 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 47 min |
| Jul 14, 4:22 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 32 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2024Every severe thunderstorm warning in 2024
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.