Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 228, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 25, 2023, 2:36 PM EDT for 4 counties in Pennsylvania. It was in force for 39 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
- Jul 25, 2023, 2:36 PM EDT (18:36 UTC)
- Expired
- Jul 25, 2023, 3:15 PM EDT
- In force
- 39 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Bucks County, PA, Chester County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 81 km from the middle of the area, began a volume at 18:38 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 |
|---|---|---|---|
| Jul 25, 12:13 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 6.6 hours before the alert went out and 221 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
- 231 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 960 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
738
WUUS51 KPHI 251836
SVRPHI
PAC017-029-091-101-251915-
/O.NEW.KPHI.SV.W.0228.230725T1836Z-230725T1915Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
236 PM EDT Tue Jul 25 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Montgomery County in southeastern Pennsylvania...
Central Bucks County in southeastern Pennsylvania...
Northeastern Chester County in southeastern Pennsylvania...
Northern Philadelphia County in southeastern Pennsylvania...
* Until 315 PM EDT.
* At 235 PM EDT, a severe thunderstorm was located near Collegeville,
or 18 miles northwest of Philadelphia, moving east at 25 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...
Philadelphia, Norristown, Phoenixville, Lansdale, West Norriton,
East Norriton, Doylestown, Conshohocken, Hatboro, Souderton,
Ambler, Collegeville, Jenkintown, Chalfont, Trappe, Hatfield,
Rockledge, Abington, Schwenksville and Bryn Athyn.
This includes the following highways...
Pennsylvania Turnpike between mile markers 321 and 348.
Northeast Extension between mile markers 21 and 35.
Interstate 76 in Pennsylvania between mile markers 327 and 335.
Interstate 476 in Pennsylvania between mile markers 16 and 19.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4032 7548 4036 7502 4003 7502 4006 7535
4006 7537 4007 7552
TIME...MOT...LOC 1835Z 271DEG 23KT 4018 7539
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLBThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 11:58 AM EDT | Special Weather Statement | PHI | Montgomery | 32 min |
| Jul 25, 12:07 PM EDT | Special Weather Statement | PHI | Berks | 23 min |
| Jul 25, 12:16 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Montgomery | 44 min |
| Jul 25, 12:31 PM EDT | Special Weather Statement | PHI | Berks | 29 min |
| Jul 25, 12:33 PM EDT | Special Weather Statement | PHI | Berks | 27 min |
| Jul 25, 12:37 PM EDT | Special Weather Statement | PHI | Carbon | 38 min |
| Jul 25, 12:47 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery | 33 min |
| Jul 25, 12:56 PM EDT | Special Weather Statement | PHI | Northampton | 34 min |
| Jul 25, 1:00 PM EDT | Special Weather Statement | PHI | Berks | 30 min |
| Jul 25, 1:03 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 42 min |
| Jul 25, 1:06 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe, Northampton | 39 min |
| Jul 25, 1:10 PM EDT | Special Weather Statement | PHI | Delaware | 35 min |
| Jul 25, 1:12 PM EDT | Special Weather Statement | PHI | Monroe | 33 min |
| Jul 25, 1:20 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 5 hr |
| Jul 25, 1:27 PM EDT | Areal Flood Advisory | PHI | Berks | 3 hr |
| Jul 25, 1:27 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 48 min |
| Jul 25, 1:37 PM EDT | Areal Flood Advisory | PHI | Carbon | 3 hr |
| Jul 25, 1:38 PM EDT | Flash Flood Warning | PHI | Delaware | 4 hr |
| Jul 25, 1:41 PM EDT | Areal Flood Advisory | PHI | Lehigh, Northampton | 3 hr |
| Jul 25, 1:42 PM EDT | Special Weather Statement | PHI | Philadelphia | 33 min |
| Jul 25, 1:49 PM EDT | Special Weather Statement | PHI | Chester | 26 min |
| Jul 25, 1:54 PM EDT | Flash Flood Warning | PHI | Delaware, Philadelphia | 4 hr |
| Jul 25, 1:55 PM EDT | Areal Flood Advisory | PHI | Monroe | 2 hr |
| Jul 25, 2:06 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 39 min |
| Jul 25, 2:14 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 46 min |
| Jul 25, 2:21 PM EDT | Areal Flood Advisory | PHI | Berks, Chester, Montgomery | 2 hr |
| Jul 25, 2:51 PM EDT | Flash Flood Warning | PHI | Chester, Montgomery | 3 hr |
| Jul 25, 2:57 PM EDT | Areal Flood Advisory | PHI | Chester | 3 hr |
| Jul 25, 3:06 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Montgomery | 95 min |
| Jul 25, 3:13 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 25, 3:16 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 44 min |
| Jul 25, 3:21 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 39 min |
| Jul 25, 3:34 PM EDT | Flash Flood Warning | PHI | Chester, Montgomery | 3 hr |
| Jul 25, 3:58 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 30 min |
| Jul 25, 4:04 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Jul 25, 4:55 PM EDT | Flash Flood Warning | PHI | Chester | 118 min |
| Jul 25, 5:07 PM EDT | River Flood Warning | PHI | Chester | 6 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.