Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 39, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 12, 1996, 2:47 PM EDT for Montgomery County, Pennsylvania. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 12, 1996, 2:47 PM EDT (18:47 UTC)
- Expired
- Jun 12, 1996, 3:20 PM EDT
- In force
- 33 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
County Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 86 km from the middle of the area, began a volume at 18:47 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.8 hours before the alert went out and 103 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
- 801 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 635 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHL 121846 SVRPHL PAC091-121920- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ 247 PM EDT WED JUN 12 1996 THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY NJ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 320 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN PENNSYLVANIA ...NORTHWESTERN MONTGOMERY COUNTY AT 246 PM EDT...A SEVERE THUNDERSTORM WAS INDICATED BY NWS DOPPLER RADAR 1 MILE NORTH OF CONGO MOVING NORTHEAST AT 20 MPH. THIS STORM MAY AFFECT THE FOLLOWING NEARBY AREAS... PENNSBURG... GREEN LANE... PALM... EAST GREENVILLE AND RED HILL. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE AREA. STAY TUNED TO NOAA WEATHER RADIO...THE VOICE OF THE NATIONAL WEATHER SERVICE...OR TO COMMERCIAL RADIO OR TELEVISION STATIONS FOR THE LATEST STORM INFORMATION. IF YOU SEE SEVERE WEATHER OR FLOODING...CONTACT YOUR LOCAL LAW ENFORCEMENT AGENCY AND HAVE THEM RELAY YOUR SEVERE WEATHER REPORT ON TO THE NATIONAL WEATHER SERVICE. SEVERE THUNDERSTORMS CONTAIN WINDS GREATER THAN 58 MILES AN HOUR... DIME SIZE HAIL OR LARGER...VERY HEAVY RAINS AND DEADLY LIGHTNING. FRANKLIN/GIGI
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 3:11 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 49 min |
| Jun 12, 4:25 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 45 min |
| Jun 12, 5:16 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 34 min |
| Jun 12, 6:28 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 2 hr |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1996Every severe thunderstorm warning in 1996
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.