Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 145, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 23, 2008, 2:55 PM EDT for Bucks County, Pennsylvania; Mercer County, New Jersey. It was in force for 35 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 23, 2008, 2:55 PM EDT (18:55 UTC)
- Expired
- Jul 23, 2008, 3:30 PM EDT
- In force
- 35 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Mercer County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 53 km from the middle of the area, began a volume at 18:57 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 23, 2:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.9 hours before the alert went out and 133 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
- 1012 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 980 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- -61 m²/s²
- 0-3 km storm-relative helicity
- -48 m²/s²
- Significant tornado parameter
- -0.4
- Supercell composite
- -7.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 231855 SVRPHI NJC021-PAC017-231930- /O.NEW.KPHI.SV.W.0145.080723T1855Z-080723T1930Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 255 PM EDT WED JUL 23 2008 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL MERCER COUNTY IN CENTRAL NEW JERSEY... SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 330 PM EDT * AT 253 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR LANGHORNE...OR ABOUT 9 MILES EAST OF WILLOW GROVE...AND MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... LANGHORNE...LEVITTOWN AND RICHBORO BY 300 PM... NEWTOWN BY 310 PM... WOODSIDE BY 315 PM... TRENTON BY 320 PM... EWING AND WASHINGTON CROSSING BY 325 PM... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM WEDNESDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND SOUTHEAST PENNSYLVANIA. LAT...LON 4034 7498 4027 7463 4008 7490 4015 7503 TIME...MOT...LOC 1855Z 212DEG 17KT 4015 7493 $$ IOVINO
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 3:51 AM EDT | Flash Flood Watch | PHI | Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more | 25 hr |
| Jul 23, 4:23 AM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Montgomery | 3 hr |
| Jul 23, 2:58 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 47 min |
| Jul 23, 3:30 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 60 min |
| Jul 23, 3:58 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery | 62 min |
| Jul 23, 4:27 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 38 min |
| Jul 23, 4:47 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 58 min |
| Jul 23, 5:03 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 57 min |
| Jul 23, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 62 min |
| Jul 23, 7:00 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 60 min |
| Jul 23, 7:48 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 57 min |
| Jul 23, 3:02 AM EDT | Special Marine Warning | PHI | 58 min | |
| Jul 23, 2:44 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 46 min |
| Jul 23, 3:26 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Somerset | 64 min |
| Jul 23, 4:03 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 57 min |
| Jul 23, 4:09 PM EDT | Tornado Warning | PHI | Middlesex, Somerset | 36 min |
| Jul 23, 4:51 PM EDT | Areal Flood Warning | PHI | Middlesex, Somerset | 105 min |
| Jul 23, 7:10 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 35 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2008Severe Thunderstorm Warnings in New Jersey, 2008Every severe thunderstorm warning in 2008
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.