Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 83, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 25, 2023, 4:27 PM EDT for Chester County, Pennsylvania. It was in force for 33 min. 10 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
- Jun 25, 2023, 4:27 PM EDT (20:27 UTC)
- Expired
- Jun 25, 2023, 5:00 PM EDT
- In force
- 33 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Chester County, PA
The radar
The Philadelphia radar (KDIX), 118 km from the middle of the area, began a volume at 20:30 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 25, 4:28 PM EDT | TSTM WND GST 50 | Coatesville, PA | Report of winds estimated to be 50mph. |
| Jun 25, 4:28 PM EDT | TSTM WND GST 50 | Coatesville, PA | Report of winds estimated to be 50mph. |
| Jun 25, 4:30 PM EDT | TSTM WND DMG | 2 S Glenmoore, PA | Wires down. Time estimated from radar. |
| Jun 25, 4:30 PM EDT | TSTM WND DMG | 2 S Glenmoore, PA | Wires down. Time estimated from radar. |
| Jun 25, 4:32 PM EDT | TSTM WND GST 69 | 1 Nne East Caln Twp, PA | Measured mechanically and electronically a wind gust speed of 68.7mph with multiple tree limbs down. |
| Jun 25, 4:32 PM EDT | TSTM WND GST 69 | 1 Nne East Caln Twp, PA | Measured mechanically and electronically a wind gust speed of 68.7mph with multiple tree limbs down. |
| Jun 25, 4:38 PM EDT | TSTM WND DMG | 1 Ssw Uwchlan Twp, PA | Trees and wires down. Time estimated from radar. |
| Jun 25, 4:38 PM EDT | TSTM WND DMG | 1 Ssw Uwchlan Twp, PA | Trees and wires down. Time estimated from radar. |
| Jun 25, 4:53 PM EDT | TSTM WND DMG | 1 Nw Upper Uwchlan Twp, PA | Trees and wires down. Time estimated from radar. |
| Jun 25, 4:53 PM EDT | TSTM WND DMG | 1 Nw Upper Uwchlan Twp, PA | Trees and wires down. 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, 8.5 hours before the alert went out and 190 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
- 150 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 1013 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
521
WUUS51 KPHI 252027
SVRPHI
PAC029-252100-
/O.NEW.KPHI.SV.W.0083.230625T2027Z-230625T2100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
427 PM EDT Sun Jun 25 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
North central Chester County in southeastern Pennsylvania...
* Until 500 PM EDT.
* At 426 PM EDT, a severe thunderstorm was located near Downingtown,
or 9 miles northwest 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...
Coatesville, Downingtown, Honey Brook, Elverson, Glenmoore, Chester
Springs, Pughtown, Lionville, Lionville-Marchwood, Cedarville,
Stowe, South Coatesville, Modena, Exton, Thorndale and South
Pottstown.
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.
&&
LAT...LON 4014 7587 4024 7570 4024 7568 4000 7555
3991 7586 4012 7592
TIME...MOT...LOC 2026Z 263DEG 15KT 4004 7575
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB3 follow-up statements
886
WWUS51 KPHI 252036
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
436 PM EDT Sun Jun 25 2023
PAC029-252100-
/O.CON.KPHI.SV.W.0083.000000T0000Z-230625T2100Z/
Chester PA-
436 PM EDT Sun Jun 25 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR NORTH CENTRAL CHESTER COUNTY...
At 435 PM EDT, a severe thunderstorm was located over Downingtown, or
7 miles northwest of West Chester, moving east at 15 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Coatesville, Downingtown, Honey Brook, Elverson, Glenmoore, Chester
Springs, Pughtown, Lionville, Lionville-Marchwood, Cedarville, Stowe,
South Coatesville, Modena, Exton, Thorndale and South Pottstown.
This includes Pennsylvania Turnpike between mile markers 300 and 316.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4014 7587 4024 7570 4024 7568 4000 7555
3991 7586 4012 7592
TIME...MOT...LOC 2035Z 263DEG 15KT 4005 7570
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB610
WWUS51 KPHI 252047
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
447 PM EDT Sun Jun 25 2023
PAC029-252100-
/O.CON.KPHI.SV.W.0083.000000T0000Z-230625T2100Z/
Chester PA-
447 PM EDT Sun Jun 25 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR NORTH CENTRAL CHESTER COUNTY...
At 447 PM EDT, a severe thunderstorm was located over
Lionville-Marchwood, or near West Chester, moving east at 15 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...
Coatesville, Downingtown, Elverson, Glenmoore, Chester Springs,
Pughtown, Lionville, Lionville-Marchwood, Cedarville, Stowe, South
Coatesville, Modena, Exton, Thorndale and South Pottstown.
This includes Pennsylvania Turnpike between mile markers 301 and 316.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4015 7585 4024 7570 4024 7568 4000 7555
3991 7586 4013 7589
TIME...MOT...LOC 2047Z 263DEG 15KT 4006 7563
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB232
WWUS51 KPHI 252101
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
501 PM EDT Sun Jun 25 2023
PAC029-252111-
/O.EXP.KPHI.SV.W.0083.000000T0000Z-230625T2100Z/
Chester PA-
501 PM EDT Sun Jun 25 2023
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CHESTER COUNTY
HAS EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4015 7585 4024 7570 4024 7568 4000 7555
3991 7586 4013 7589
TIME...MOT...LOC 2101Z 263DEG 15KT 4007 7557
$$
MLBThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 8:18 PM EDT | Areal Flood Advisory | PHI | Northampton | 3 hr |
| Jun 24, 9:19 PM EDT | Areal Flood Advisory | PHI | Northampton | 101 min |
| Jun 25, 2:55 PM EDT | Special Weather Statement | PHI | Philadelphia | 35 min |
| Jun 25, 3:18 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery | 3 hr |
| Jun 25, 3:24 PM EDT | Special Weather Statement | PHI | Philadelphia | 36 min |
| Jun 25, 3:47 PM EDT | Areal Flood Advisory | PHI | Montgomery, Philadelphia | 15 min |
| Jun 25, 4:01 PM EDT | Flash Flood Warning | PHI | Montgomery, Philadelphia | 4 hr |
| Jun 25, 4:01 PM EDT | Special Weather Statement | PHI | Philadelphia | 29 min |
| Jun 25, 4:05 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 25 min |
| Jun 25, 4:11 PM EDT | Special Weather Statement | PHI | Delaware | 34 min |
| Jun 25, 4:16 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 44 min |
| Jun 25, 4:47 PM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Northampton | 3 hr |
| Jun 25, 4:51 PM EDT | Areal Flood Advisory | PHI | Berks, Chester | 3 hr |
| Jun 25, 4:52 PM EDT | Special Weather Statement | PHI | Philadelphia | 23 min |
| Jun 25, 4:57 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 33 min |
| Jun 25, 5:27 PM EDT | Areal Flood Advisory | PHI | Delaware, Montgomery, Philadelphia | 3 hr |
| Jun 25, 5:35 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 3 hr |
| Jun 25, 5:56 PM EDT | Areal Flood Advisory | PHI | Berks | 3 hr |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2023Every severe thunderstorm warning in 2023
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.