Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 26, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 6, 1997, 12:44 PM EDT for Bucks County, Pennsylvania. It was in force for 31 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 6, 1997, 12:44 PM EDT (16:44 UTC)
- Expired
- May 6, 1997, 1:15 PM EDT
- In force
- 31 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
County Bucks County, PA
The radar
The Philadelphia radar (KDIX), 73 km from the middle of the area, began a volume at 16:46 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 |
|---|---|---|---|
| May 6, 12:48 PM EDT | Thunderstorm Wind | Doylestown, PA | |
| May 6, 12:55 PM EDT | Thunderstorm Wind 52 | Bristol, PA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 6, 11:45 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 4.7 hours before the alert went out and 128 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1321 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHL 061643 RRA SVRPHL PAC017-061715- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ 1244 PM EDT TUE MAY 6 1997 THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY NJ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 115 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN PENNSYLVANIA ...BUCKS COUNTY AT 1235 PM WEATHER SERVICE DOPPLER RADAR SHOWED VERY STRONG THUNDERSTORMS OVER DOYLESTOWN. THESE THUNDERSTORMS WERE MOVING EAST AROUND 25 MPH AND WILL CROSS THE COUNTY BEFORE 1 PM A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE AREA. IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW. AFTER THE STORM HAS PASSED...REPORT ANY SEVERE WEATHER OR FLOODING TO 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 S:IZE HAIL OR LARGER...VERY HEAVY RAINS AND DEADLY LIGHTNING. 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.
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 11:07 AM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 63 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1997Every severe thunderstorm warning in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.