Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 256, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 9, 2008, 8:40 AM EDT for 4 counties in Pennsylvania. It was in force for 50 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
- Sep 9, 2008, 8:40 AM EDT (12:40 UTC)
- Expired
- Sep 9, 2008, 9:30 AM EDT
- In force
- 50 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Binghamton radar (KBGM), 147 km from the middle of the area, began a volume at 12:41 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 |
|---|---|---|---|
| Sep 9, 8:50 AM EDT | TSTM WND DMG | Paradise Valley, PA | TREES DOWN AT THE CORNER OF KOERNERS ROAD AND RT. 390 |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 0.7 hours before the alert went out and 162 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
- 1988 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 557 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 091240
SVRPHI
PAC025-077-089-095-091330-
/O.NEW.KPHI.SV.W.0256.080909T1240Z-080909T1330Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
840 AM EDT TUE SEP 9 2008
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EXTREME NORTH CENTRAL LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
WEST CENTRAL NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
WESTERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
* UNTIL 930 AM EDT
* AT 835 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 NEW MAHONING...OR ABOUT
7 MILES WEST OF LEHIGHTON...AND MOVING NORTHEAST AT ABOUT 40 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WEATHERLY...JIM THORPE...PALMERTON...BELTZVILLE STATE PARK...
CHRISTMANS...DANIELSVILLE...PENN FOREST RESERVOIR...
ALBRIGHTSVILLE...LAKE HARMONY...MECKESVILLE...JONAS...GILBERT...
ROSSLAND...POCONO RACEWAY...BRODHEADSVILLE...LONG POND...POCONO
PINES...REEDERS...MOUNT POCONO...SCOTRUN...PARADISE VALLEY...
MOUNTAINHOME AND CANADENSIS
DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
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 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 4121 7524 4080 7536 4075 7580 4078 7584
4078 7585 4081 7588 4081 7589 4084 7593
4093 7592
TIME...MOT...LOC 1239Z 246DEG 38KT 4084 7581
$$
MPD1 follow-up statement
000
WWUS51 KPHI 091311
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
911 AM EDT TUE SEP 9 2008
PAC077-091321-
/O.CAN.KPHI.SV.W.0256.000000T0000Z-080909T1330Z/
LEHIGH PA-
911 AM EDT TUE SEP 9 2008
...THE SEVERE THUNDERSTORM WARNING FOR EXTREME NORTH CENTRAL LEHIGH
COUNTY IS CANCELLED...
LAT...LON 4080 7536 4078 7557 4084 7556 4110 7548
4121 7524
TIME...MOT...LOC 1311Z 246DEG 38KT 4098 7540
$$
PAC025-089-095-091330-
/O.CON.KPHI.SV.W.0256.000000T0000Z-080909T1330Z/
NORTHAMPTON PA-CARBON PA-MONROE PA-
911 AM EDT TUE SEP 9 2008
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 AM EDT
FOR WESTERN MONROE...EAST CENTRAL CARBON AND WEST CENTRAL NORTHAMPTON
COUNTIES...
AT 908 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 ABOUT 10 MILES SOUTH OF
GILBERT...OR 20 MILES SOUTH OF MOUNT POCONO...MOVING NORTHEAST AT 44
MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
REEDERS...SCOTRUN...PARADISE VALLEY...MOUNTAINHOME AND CANADENSIS
LAT...LON 4080 7536 4078 7557 4084 7556 4110 7548
4121 7524
TIME...MOT...LOC 1311Z 246DEG 38KT 4098 7540
$$
MPDThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 9, 8:51 AM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 3 hr |
| Sep 9, 8:51 AM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Carbon, Chester, Lehigh, Montgomery and 1 more | 39 min |
| Sep 9, 9:09 AM EDT | Areal Flood Advisory | PHI | Northampton | 3 hr |
| Sep 9, 9:21 AM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Monroe and 3 more | 39 min |
| Sep 9, 9:30 AM EDT | Flash Flood Warning | PHI | Chester, Montgomery | 3 hr |
| Sep 9, 9:41 AM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Sep 9, 9:59 AM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 3 hr |
| Sep 9, 10:57 AM EDT | Severe Thunderstorm Warning | PHI | Bucks | 48 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.