Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 270, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 15, 2008, 4:15 PM EST for 5 counties in Pennsylvania. It was in force for 60 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, 4:15 PM EST (21:15 UTC)
- Expired
- Nov 15, 2008, 5:15 PM EST
- In force
- 60 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Berks County, PA, Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 112 km from the middle of the area, began a volume at 21:18 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, 12:22 PM EST | Tornado Watch | SPC | 7 hr |
| Nov 15, 2:56 PM EST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 9.3 hours before the alert went out and 228 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 152115 RRA
SVRPHI
PAC011-017-029-077-091-152215-
/O.NEW.KPHI.SV.W.0270.081115T2115Z-081115T2215Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
415 PM EST SAT NOV 15 2008
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EASTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
NORTHWESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
NORTHEASTERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 515 PM EST
* AT 409 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS
IN EXCESS OF 60 MPH. THIS LINE EXTENDED FROM NEAR ALLENTOWN TO
NEAR WEST CHESTER...AND MOVING EAST AT 30 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
GERYVILLE AND ZIONSVILLE BY 420 PM...
QUAKERTOWN BY 430 PM...
PERKASIE BY 435 PM...
DUBLIN BY 440 PM...
BEDMINSTER...PIPERSVILLE...OTTSVILLE AND REVERE BY 445 PM...
TINICUM BY 450 PM...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM SATURDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY AND
SOUTHEASTERN PENNSYLVANIA. A TORNADO WATCH ALSO REMAINS IN EFFECT
UNTIL 900 PM SATURDAY EVENING FOR NORTHWESTERN NEW JERSEY AND
NORTHEASTERN PENNSYLVANIA.
LAT...LON 4068 7587 4077 7565 4061 7547 4051 7536
4058 7521 4041 7505 4005 7542 4008 7581
TIME...MOT...LOC 2114Z 262DEG 35KT 4040 7555
$$
NIERENBERG1 follow-up statement
000
WWUS51 KPHI 152137
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
437 PM EST SAT NOV 15 2008
PAC011-017-029-077-091-152215-
/O.CON.KPHI.SV.W.0270.000000T0000Z-081115T2215Z/
CHESTER PA-MONTGOMERY PA-BERKS PA-LEHIGH PA-BUCKS PA-
437 PM EST SAT NOV 15 2008
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EST
FOR NORTHWESTERN BUCKS...SOUTHEASTERN LEHIGH...EXTREME EAST CENTRAL
BERKS...MONTGOMERY AND NORTHEASTERN CHESTER COUNTIES...
AT 432 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED FROM ALLENTOWN TO
NEAR RED HILL...OR 15 MILES SOUTH OF ALLENTOWN...MOVING EAST AT 40
MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
PERKASIE...SELLERSVILLE AND SILVERDALE BY 445 PM EST...
DUBLIN BY 450 PM EST...
BEDMINSTER AND OTTSVILLE BY 455 PM EST...
PIPERSVILLE...TINICUM AND GARDENVILLE BY 500 PM EST...
BYRAM BY 505 PM EST...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM EST SATURDAY EVENING
FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY AND
SOUTHEASTERN PENNSYLVANIA. A TORNADO WATCH ALSO REMAINS IN EFFECT
UNTIL 900 PM EST SATURDAY EVENING FOR NORTHWESTERN NEW JERSEY AND
NORTHEASTERN PENNSYLVANIA.
LAT...LON 4057 7560 4061 7547 4051 7536 4058 7521
4041 7505 4005 7542 4005 7544 4005 7545
4005 7551 4007 7561
TIME...MOT...LOC 2137Z 262DEG 35KT 4038 7540
$$
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, 4:33 PM EST | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 38 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.