Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 75, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 15, 2009, 3:16 PM EDT for Carbon County, Lehigh County, Northampton County, Pennsylvania. It was in force for 59 min. 4 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
- Jun 15, 2009, 3:16 PM EDT (19:16 UTC)
- Expired
- Jun 15, 2009, 4:15 PM EDT
- In force
- 59 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Carbon County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 132 km from the middle of the area, began a volume at 19:18 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 |
|---|---|---|---|
| Jun 15, 3:25 PM EDT | HAIL 0.88 | 1 W Slatington, PA | |
| Jun 15, 3:25 PM EDT | HAIL 1.75 | Walnutport, PA | |
| Jun 15, 4:00 PM EDT | HAIL 0.75 | Allentown, PA | |
| Jun 15, 4:10 PM EDT | HAIL 1 | Allentown, PA | TREES DOWN. |
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, 7.3 hours before the alert went out and 144 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
- 196 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 943 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 151916
SVRPHI
PAC025-077-095-152015-
/O.NEW.KPHI.SV.W.0075.090615T1916Z-090615T2015Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
316 PM EDT MON JUN 15 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
THIS INCLUDES THE CITY OF ALLENTOWN...
SOUTHWESTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
THIS INCLUDES THE CITY OF BETHLEHEM...
SOUTHEASTERN CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
* UNTIL 415 PM EDT
* AT 315 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
BERLINSVILLE...OR 8 MILES SOUTHEAST OF LEHIGHTON...AND MOVING
SOUTHEAST AT 20 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
NEFFS...SCHNECKSVILLE...BEERSVILLE...CLAUSSVILLE...NORTHAMPTON...
BATH...STEUBEN...ANCIENT OAKS...LEHIGH UNIVERSITY...EMMAUS...
HELLERTOWN AND ZIONSVILLE
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 NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
&&
LAT...LON 4085 7551 4081 7549 4061 7523 4044 7552
4060 7575 4072 7583 4074 7578 4076 7580
TIME...MOT...LOC 1916Z 326DEG 19KT 4076 7560
$$
GORSE2 follow-up statements
000
WWUS51 KPHI 151936
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
336 PM EDT MON JUN 15 2009
PAC025-151945-
/O.CAN.KPHI.SV.W.0075.000000T0000Z-090615T2015Z/
CARBON PA-
336 PM EDT MON JUN 15 2009
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CARBON COUNTY IS
CANCELLED...
THE STRONGEST PART OF THE STORM HAS EXITED THE COUNTY, THEREFORE THE
WARNING HAS BEEN CANCELLED.
LAT...LON 4078 7565 4081 7549 4061 7523 4044 7552
4060 7575 4072 7583
TIME...MOT...LOC 1935Z 330DEG 19KT 4067 7553
$$
PAC077-095-152015-
/O.CON.KPHI.SV.W.0075.000000T0000Z-090615T2015Z/
LEHIGH PA-NORTHAMPTON PA-
336 PM EDT MON JUN 15 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTHWESTERN NORTHAMPTON AND LEHIGH COUNTIES...
AT 333 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
COPLAY...OR 7 MILES NORTHWEST OF ALLENTOWN...MOVING SOUTHEAST AT 20
MPH. THIS STORM PRODUCED HAIL TO THE SIZE OF NICKELS EARLIER IN
FRANKLIN TOWNSHIP IN CARBON COUNTY.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CLAUSSVILLE...HOKENDAUQUA...NORTH CATASAUQUA...CATASAUQUA...
STEUBEN...FULLERTON...ANCIENT OAKS...BETHLEHEM...FOUNTAIN HILL...
FREEMANSBURG...LEHIGH UNIVERSITY...ALBURTIS...MACUNGIE...EMMAUS...
HELLERTOWN AND ZIONSVILLE
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 NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
&&
LAT...LON 4078 7565 4081 7549 4061 7523 4044 7552
4060 7575 4072 7583
TIME...MOT...LOC 1935Z 330DEG 19KT 4067 7553
$$
GORSE/DEFINO000
WWUS51 KPHI 152005
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
405 PM EDT MON JUN 15 2009
PAC077-095-152015-
/O.CON.KPHI.SV.W.0075.000000T0000Z-090615T2015Z/
LEHIGH PA-NORTHAMPTON PA-
405 PM EDT MON JUN 15 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTH CENTRAL NORTHAMPTON AND LEHIGH COUNTIES...
AT 403 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
ALLENTOWN...MOVING SOUTHEAST AT 20 MPH.
THIS STORM HAS A HISTORY OF PRODUCING NICKEL SIZE HAIL.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
FOUNTAIN HILL...FREEMANSBURG...LEHIGH UNIVERSITY...ALBURTIS...
MACUNGIE...EMMAUS...HELLERTOWN AND ZIONSVILLE
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
&&
LAT...LON 4070 7558 4073 7541 4061 7523 4044 7552
4059 7574
TIME...MOT...LOC 2003Z 330DEG 19KT 4058 7548
$$
GORSE/DEFINOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 15, 2:33 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 57 min |
| Jun 15, 4:15 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 60 min |
| Jun 15, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 62 min |
| Jun 15, 5:55 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery, Philadelphia | 65 min |
| Jun 15, 6:37 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 53 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.