Alert archive / New Jersey / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 137, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 20, 2008, 8:48 PM EDT for Warren County, New Jersey; Northampton County, Pennsylvania. It was in force for 42 min. 2 reports 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
- Jul 20, 2008, 8:48 PM EDT (00:48 UTC)
- Expired
- Jul 20, 2008, 9:30 PM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Warren County, NJ, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 107 km from the middle of the area, began a volume at 00:51 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 |
|---|---|---|---|
| Jul 20, 8:55 PM EDT | TSTM WND DMG | 3 Nne Wilson, PA | A LARGE TREE WAS BLOWN DOWN IN FORKS TOWNSHIP. |
| Jul 20, 8:55 PM EDT | TSTM WND GST 67 | 3 Nne Wilson, PA | A THUNDERSTORM WIND GUST OF 67 MPH WAS REPORTED IN FORKS TOWNSHIP. THE MEASUREMENT WAS VIA AN ANEMOMETER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 0.8 hours before the alert went out and 189 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
- 254 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 1155 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 210048
SVRPHI
NJC041-PAC095-210130-
/O.NEW.KPHI.SV.W.0137.080721T0048Z-080721T0130Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
848 PM EDT SUN JUL 20 2008
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
SOUTHWESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY...
* UNTIL 930 PM EDT
* AT 846 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
WILSON...OR ABOUT NEAR EASTON...AND MOVING EAST AT 27 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
ALPHA BY 855 PM...
HARMONY BY 900 PM...
6 MILES SOUTH OF ROXBURG AND 9 MILES SOUTH OF BELVIDERE BY 905
PM...
PLEASANT VALLEY...WASHINGTON...BRASS CASTLE AND 8 MILES SOUTH OF
OXFORD BY 915 PM...
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 LARGE 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 4087 7493 4072 7497 4064 7514 4061 7530
4077 7536
TIME...MOT...LOC 0048Z 266DEG 24KT 4069 7523
$$
EBERWINE1 follow-up statement
000
WWUS51 KPHI 210109
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
909 PM EDT SUN JUL 20 2008
PAC095-210119-
/O.CAN.KPHI.SV.W.0137.000000T0000Z-080721T0130Z/
NORTHAMPTON PA-
909 PM EDT SUN JUL 20 2008
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL NORTHAMPTON COUNTY IS
CANCELLED...
LAT...LON 4076 7496 4074 7496 4073 7497 4067 7507
4067 7509 4064 7515 4080 7509 4081 7495
TIME...MOT...LOC 0109Z 266DEG 24KT 4070 7505
$$
NJC041-210130-
/O.CON.KPHI.SV.W.0137.000000T0000Z-080721T0130Z/
WARREN NJ-
909 PM EDT SUN JUL 20 2008
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR SOUTH CENTRAL WARREN COUNTY...
AT 908 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR PLEASANT VALLEY...OR 9 MILES EAST OF EASTON...MOVING
EAST AT 28 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
PLEASANT VALLEY...WASHINGTON AND BRASS CASTLE BY 915 PM EDT...
LAT...LON 4076 7496 4074 7496 4073 7497 4067 7507
4067 7509 4064 7515 4080 7509 4081 7495
TIME...MOT...LOC 0109Z 266DEG 24KT 4070 7505
$$
EBERWINEThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 5:20 AM EDT | Coastal Flood Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 24 hr |
| Jul 20, 8:17 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 58 min |
| Jul 20, 9:22 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 23 min |
| Jul 20, 9:29 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery | 32 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2008Severe 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.