Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 159, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 23, 2008, 7:48 PM EDT for Burlington County, Camden County, Gloucester County, New Jersey; 4 counties in Pennsylvania. It was in force for 57 min. 2 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 23, 2008, 7:48 PM EDT (23:48 UTC)
- Expired
- Jul 23, 2008, 8:45 PM EDT
- In force
- 57 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 54 km from the middle of the area, began a volume at 23:49 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 23, 7:56 PM EDT | HAIL 0.75 | Philadelphia Internatio, PA | OBSERVED AT PHILADELPHIA INTERNATIONAL AIRPORT. |
| Jul 23, 8:35 PM EDT | HAIL 0.5 | Edgewater Park, NJ |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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, 11.8 hours before the alert went out and 112 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 232348 SVRPHI NJC005-007-015-PAC017-045-091-101-240045- /O.NEW.KPHI.SV.W.0159.080723T2348Z-080724T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 748 PM EDT WED JUL 23 2008 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... SOUTHEASTERN DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA... SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA... PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA... NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY... NORTHWESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY... NORTHWESTERN GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY... * UNTIL 845 PM EDT * AT 745 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 CHESTER...AND MOVING NORTHEAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... FOLCROFT...PHILADELPHIA INTERNATIONAL AIRPORT AND DREXEL HILL BY 755 PM... SOUTH PHILADELPHIA...YEADON...EAST LANSDOWNE AND MORRIS PARK BY 800 PM... ROXBOROUGH AND GLOUCESTER CITY BY 805 PM... KENSINGTON BY 810 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 4029 7491 4001 7456 3976 7531 3988 7545 TIME...MOT...LOC 2348Z 229DEG 30KT 3986 7531 $$ IOVINO
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 3:02 AM EDT | Special Marine Warning | PHI | 58 min | |
| Jul 23, 3:51 AM EDT | Flash Flood Watch | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more | 25 hr |
| Jul 23, 2:44 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 46 min |
| Jul 23, 2:55 PM EDT | Severe Thunderstorm Warning | PHI | Mercer | 35 min |
| Jul 23, 2:58 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon | 47 min |
| Jul 23, 3:26 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Somerset | 64 min |
| Jul 23, 3:30 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 60 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, 5:03 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Somerset | 57 min |
| Jul 23, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Somerset | 62 min |
| Jul 23, 7:00 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 60 min |
| Jul 23, 7:10 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 35 min |
| Jul 23, 4:23 AM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Montgomery | 3 hr |
| 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 |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.