Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 132, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 17, 2008, 5:13 PM EDT for Lehigh County, Northampton County, Pennsylvania. It was in force for 62 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 17, 2008, 5:13 PM EDT (21:13 UTC)
- Expired
- Jul 17, 2008, 6:15 PM EDT
- In force
- 62 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 123 km from the middle of the area, began a volume at 21:13 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 17, 5:15 PM EDT | HAIL 0.88 | 1 E Allentown, PA | HAIL TO THE SIZE OF DIMES AND NICKELS REPORTED IN EAST ALLENTOWN. |
| Jul 17, 5:18 PM EDT | TSTM WND GST 46 | Allentown, PA | A 46 MPH THUNDERSTORM WIND GUST WAS MEASURED AT THE LEHIGH VALLEY INTERNATIOAL AIRPORT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.2 hours before the alert went out and 145 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
- 85 J/kg
- Mixed-layer CIN
- -135 J/kg
- Mixed-layer LCL
- 1547 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -34 m²/s²
- 0-3 km storm-relative helicity
- -48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 172114 SVRPHI PAC077-095-172215- /O.NEW.KPHI.SV.W.0132.080717T2113Z-080717T2215Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 513 PM EDT THU JUL 17 2008 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA... WEST CENTRAL NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA... * UNTIL 615 PM EDT * AT 509 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 EMERALD...OR ABOUT 7 MILES SOUTHEAST OF LEHIGHTON...AND MOVING EAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... NORTHAMPTON AND 9 MILES NORTH OF ALLENTOWN BY 520 PM... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. 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. LAT...LON 4068 7535 4055 7543 4074 7575 4079 7559 TIME...MOT...LOC 2113Z 284DEG 39KT 4074 7557 $$ NIERENBERG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 4:09 PM EDT | Excessive Heat Warning | PHI | Delaware, Philadelphia | 3 days |
| Jul 17, 4:31 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 59 min |
| Jul 17, 4:56 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe, Northampton | 64 min |
| Jul 17, 5:14 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 2 hr |
| Jul 17, 5:23 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 67 min |
| Jul 17, 5:55 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 51 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 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.