Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 196, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 11, 2009, 4:19 PM EDT for Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 11, 2009, 4:19 PM EDT (20:19 UTC)
- Expired
- Aug 11, 2009, 4:53 PM EDT
- In force
- 34 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Warren County, NJ, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 117 km from the middle of the area, began a volume at 20:20 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.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.3 hours before the alert went out and 175 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
- 93 J/kg
- Mixed-layer CIN
- -161 J/kg
- Mixed-layer LCL
- 1076 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -52 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 112019
SVRPHI
NJC041-PAC089-095-112115-
/O.NEW.KPHI.SV.W.0196.090811T2019Z-090811T2115Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
419 PM EDT TUE AUG 11 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
THIS INCLUDES THE CITY OF EASTON...
SOUTH CENTRAL MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
WARREN COUNTY IN NORTHWEST NEW JERSEY...
* UNTIL 515 PM EDT
* AT 417 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
SAYLORSBURG...OR 13 MILES SOUTH OF MOUNT POCONO...AND MOVING
SOUTHEAST AT 25 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
STORMVILLE AROUND 425 PM EDT...
PEN ARGYL AND WIND GAP AROUND 430 PM EDT...
BANGOR AND EAST BANGOR AROUND 435 PM EDT...
BELVIDERE AND HARMONY AROUND 450 PM EDT...
ROXBURG AROUND 455 PM EDT...
OXFORD AROUND 500 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES GREATEST KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...HEAVY RAIN WILL OCCUR
WITH THESE STORMS AND CAUSE LOW-LYING AND POOR DRAINAGE FLOODING.
&&
LAT...LON 4091 7479 4071 7498 4062 7522 4091 7550
4105 7535
TIME...MOT...LOC 2019Z 308DEG 23KT 4092 7532
$$1 follow-up statement
000
WWUS51 KPHI 112053
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
453 PM EDT TUE AUG 11 2009
NJC041-PAC089-095-112101-
/O.CAN.KPHI.SV.W.0196.000000T0000Z-090811T2115Z/
WARREN NJ-NORTHAMPTON PA-MONROE PA-
453 PM EDT TUE AUG 11 2009
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MONROE...EASTERN
NORTHAMPTON AND WARREN COUNTIES IS CANCELLED...
THUNDERSTORMS WILL CONTINUE TO AFFECT EASTERN NORTHAMPTON COUNTY
PENNSYLVANIA AND CENTRAL WARREN COUNTY NEW JERSEY FROM BLAIRSTOWN
SOUTH TO WASHINGTON THROUGH 530 PM...BUT THUNDERSTORMS HAVE WEAKENED
BELOW SEVERE LEVELS.
LAT...LON 4091 7479 4071 7498 4062 7522 4091 7550
4105 7535
TIME...MOT...LOC 2051Z 308DEG 23KT 4079 7511
$$The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 8:08 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 37 min |
| Aug 11, 3:47 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 43 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2009Severe Thunderstorm Warnings in New Jersey, 2009Every severe thunderstorm warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.