Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 24, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 14, 2024, 4:37 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 38 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
- Jun 14, 2024, 4:37 PM EDT (20:37 UTC)
- Expired
- Jun 14, 2024, 5:15 PM EDT
- In force
- 38 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Berks County, PA, Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 122 km from the middle of the area, began a volume at 20:37 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 14, 4:52 PM EDT | TSTM WND DMG | 1 Wnw Mertztown, PA | Large tree down on Barclay Street in Mertztown, PA in Berks County. Photo relayed via social media. Time estimated from radar. |
| Jun 14, 4:55 PM EDT | TSTM WND GST 39 | 1 Nw Salisbury Twp, PA | AWOS station KXLL Queen City. |
| Jun 14, 5:05 PM EDT | TSTM WND DMG | 1 Wsw Upper Saucon Twp, PA | Reports of trees and wires down around Upper Saucon Twp. Time estimated. |
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, 8.6 hours before the alert went out and 229 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
- 50 J/kg
- Mixed-layer CIN
- -171 J/kg
- Mixed-layer LCL
- 1393 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
915
WUUS51 KPHI 142037
SVRPHI
PAC011-077-142115-
/O.NEW.KPHI.SV.W.0024.240614T2037Z-240614T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
437 PM EDT Fri Jun 14 2024
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northeastern Berks County in eastern Pennsylvania...
Southern Lehigh County in eastern Pennsylvania...
* Until 515 PM EDT.
* At 437 PM EDT, a severe thunderstorm was located near
Lenhartsville, or 12 miles north of Reading, moving east at 30 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...
Allentown, Emmaus, Kutztown, Hamburg, Fleetwood, Topton, Leesport,
Shoemakersville, Bally, Bechtelsville, Lyons, Lenhartsville,
Zionsville, Ancient Oaks, Boyertown, Macungie, Coopersburg,
Alburtis, and Centerport.
This includes the following highways...
Northeast Extension between mile markers 46 and 56.
Interstate 78 in Pennsylvania between mile markers 33 and 62.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4064 7590 4055 7534 4054 7534 4042 7549
4045 7553 4033 7563 4046 7605
TIME...MOT...LOC 2037Z 283DEG 26KT 4051 7588
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hoeflich1 follow-up statement
416
WWUS51 KPHI 142105
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
505 PM EDT Fri Jun 14 2024
PAC011-077-142115-
/O.EXP.KPHI.SV.W.0024.000000T0000Z-240614T2115Z/
Berks PA-Lehigh PA-
505 PM EDT Fri Jun 14 2024
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BERKS AND
SOUTHERN LEHIGH COUNTIES WILL EXPIRE AT 515 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southeastern Pennsylvania.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4064 7590 4055 7534 4054 7534 4042 7549
4045 7553 4033 7563 4046 7605
TIME...MOT...LOC 2105Z 283DEG 26KT 4124 7476
$$
HoeflichThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 4:14 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 46 min |
| Jun 14, 4:40 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 50 min |
| Jun 14, 5:07 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jun 14, 5:17 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery, Philadelphia | 43 min |
| Jun 14, 5:23 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 52 min |
| Jun 14, 5:37 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 38 min |
| Jun 14, 5:59 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| Jun 14, 6:09 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 21 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.