Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 180, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 8, 2007, 1:42 AM EDT for Lehigh County, Northampton County, Pennsylvania. It was in force for 63 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
- Aug 8, 2007, 1:42 AM EDT (05:42 UTC)
- Expired
- Aug 8, 2007, 2:45 AM EDT
- In force
- 63 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
Counties Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 131 km from the middle of the area, began a volume at 05:45 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 nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 5.7 hours before the alert went out and 230 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
- 98 J/kg
- Mixed-layer CIN
- -237 J/kg
- Mixed-layer LCL
- 1372 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 30 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 080542 SVRPHI PAC077-095-080645- /O.NEW.KPHI.SV.W.0180.070808T0542Z-070808T0645Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 142 AM EDT WED AUG 8 2007 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... THIS INCLUDES THE CITY OF BETHLEHEM... * UNTIL 245 AM EDT * AT 142 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR EMERALD...OR ABOUT 16 MILES NORTHWEST OF ALLENTOWN...AND MOVING EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... EMERALD BY 150 AM EDT... NEFFS AND SCHNECKSVILLE BY 155 AM EDT... BERLINSVILLE BY 200 AM EDT... DANIELSVILLE AND NORTHAMPTON BY 210 AM EDT... BEERSVILLE BY 215 AM EDT... BATH BY 225 AM EDT... THUNDERSTORMS ARE CAPABLE OF PRODUCING HEAVY RAINFALL WHICH MAY RESULT IN LOCALIZED AREAS OF FLOODING. DO NOT DRIVE IN AREAS WHERE WATER IS CROSSING THE ROAD. 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. LAT...LON 4075 7581 4060 7559 4063 7528 4081 7546 $$ RNS
1 follow-up statement
000 WWUS51 KPHI 080618 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 218 AM EDT WED AUG 8 2007 PAC077-095-080645- /O.CON.KPHI.SV.W.0180.000000T0000Z-070808T0645Z/ LEHIGH PA-NORTHAMPTON PA- 218 AM EDT WED AUG 8 2007 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM EDT FOR CENTRAL NORTHAMPTON AND NORTHERN LEHIGH COUNTIES... AT 218 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR WALNUTPORT...OR ABOUT 10 MILES NORTHWEST OF ALLENTOWN...MOVING EAST AT 50 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... BEERSVILLE AND NORTHAMPTON BY 225 AM EDT... BATH AND CHAPMAN BY 230 AM EDT... NAZARETH...EASTLAWN GARDENS...STOCKERTOWN AND BELFAST BY 235 AM EDT... TATAMY BY 240 AM EDT... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. TORRENTIAL DOWNPOURS CAN ALSO BE EXPECTED WITH RAINFALL RATES IN EXCESS OF 2 INCHES IN AN HOUR. LAT...LON 4075 7581 4062 7572 4073 7518 4086 7527 $$ RNS
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 1:15 AM EDT | Severe Thunderstorm Warning | PHI | Carbon | 60 min |
| Aug 8, 2:09 AM EDT | Severe Thunderstorm Warning | PHI | Carbon | 40 min |
| Aug 8, 2:57 AM EDT | Severe Thunderstorm Warning | PHI | Northampton | 18 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2007Every severe thunderstorm warning in 2007
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.