Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 272, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 15, 2008, 4:33 PM EST for Lehigh County, Northampton County, Pennsylvania. It was in force for 38 min. 1 report 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
- Nov 15, 2008, 4:33 PM EST (21:33 UTC)
- Expired
- Nov 15, 2008, 5:11 PM EST
- In force
- 38 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 116 km from the middle of the area, began a volume at 21:32 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 |
|---|---|---|---|
| Nov 15, 4:40 PM EST | TSTM WND DMG | 3 E Emmaus, PA | TREE REPORTED DOWN IN UPPER SAUCON TOWNSHIP. |
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 |
|---|---|---|---|
| Nov 15, 2:56 PM EST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 9.6 hours before the alert went out and 203 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
- 604 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 246 m²/s²
- 0-3 km storm-relative helicity
- 314 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 152133
SVRPHI
PAC077-095-152230-
/O.NEW.KPHI.SV.W.0272.081115T2133Z-081115T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
433 PM EST SAT NOV 15 2008
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EASTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 530 PM EST
* AT 427 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED NEAR EMMAUS...OR ABOUT NEAR
ALLENTOWN...AND MOVING NORTHEAST AT 30 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
OLD ORCHARD...WILSON AND 7 MILES SOUTHEAST OF NAZARETH BY 440 PM...
9 MILES SOUTHEAST OF BELFAST BY 445 PM...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM SATURDAY EVENING FOR
NORTHWESTERN NEW JERSEY AND NORTHEASTERN PENNSYLVANIA.
LAT...LON 4091 7516 4084 7511 4075 7521 4063 7525
4048 7552 4077 7553
TIME...MOT...LOC 2133Z 232DEG 50KT 4058 7535
$$
NIERENBERG1 follow-up statement
000
WWUS51 KPHI 152211
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
511 PM EST SAT NOV 15 2008
PAC077-095-152221-
/O.CAN.KPHI.SV.W.0272.000000T0000Z-081115T2230Z/
LEHIGH PA-NORTHAMPTON PA-
511 PM EST SAT NOV 15 2008
...THE SEVERE THUNDERSTORM WARNING FOR NORTHAMPTON AND EASTERN LEHIGH
COUNTIES IS CANCELLED...
THE THUNDERSTORM HAS WEAKENED AND MOVED EAST OF THE AFFECTED AREA.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EST SATURDAY EVENING
FOR NORTHWESTERN NEW JERSEY AND NORTHEASTERN PENNSYLVANIA.
LAT...LON 4091 7516 4084 7511 4075 7521 4063 7525
4048 7552 4077 7553
TIME...MOT...LOC 2211Z 232DEG 50KT 4090 7480
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 15, 3:54 PM EST | Severe Thunderstorm Warning | PHI | Berks | 38 min |
| Nov 15, 4:15 PM EST | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 60 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.