Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 43, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 15, 2011, 5:03 PM EDT for Lehigh County, Monroe County, Northampton County, Pennsylvania. It was in force for 57 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
- May 15, 2011, 5:03 PM EDT (21:03 UTC)
- Expired
- May 15, 2011, 6:00 PM EDT
- In force
- 57 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 127 km from the middle of the area, began a volume at 21:05 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
Brookhaven, NY (KOKX), launched 12:00Z, 9.1 hours before the alert went out and 216 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
- 504 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 143 m²/s²
- 0-3 km storm-relative helicity
- 236 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
763
WUUS51 KPHI 152103
SVRPHI
PAC077-089-095-152200-
/O.NEW.KPHI.SV.W.0043.110515T2103Z-110515T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
503 PM EDT SUN MAY 15 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTH CENTRAL LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
SOUTH CENTRAL MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
* UNTIL 600 PM EDT
* AT 501 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED NEAR NORTHAMPTON...OR 8 MILES NORTHWEST OF
ALLENTOWN...AND MOVING NORTHEAST AT 20 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
BEERSVILLE AROUND 515 PM EDT...
BATH AROUND 525 PM EDT...
NAZARETH AROUND 535 PM EDT...
ROSSLAND AROUND 540 PM EDT...
BELFAST AROUND 545 PM EDT...
WIND GAP AROUND 550 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
&&
LAT...LON 4076 7559 4097 7523 4083 7510 4063 7548
4073 7561
TIME...MOT...LOC 2104Z 231DEG 18KT 4070 7553
$$
HAYES3 follow-up statements
297
WWUS51 KPHI 152125
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
525 PM EDT SUN MAY 15 2011
PAC077-089-095-152200-
/O.CON.KPHI.SV.W.0043.000000T0000Z-110515T2200Z/
LEHIGH PA-NORTHAMPTON PA-MONROE PA-
525 PM EDT SUN MAY 15 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTH CENTRAL MONROE...NORTHAMPTON AND NORTH CENTRAL LEHIGH
COUNTIES...
AT 522 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL. THIS STORM WAS LOCATED NEAR CHAPMAN...OR 11 MILES WEST OF
EASTON...MOVING NORTHEAST AT 20 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
EASTLAWN GARDENS BY 535 PM EDT...
BELFAST AND STOCKERTOWN BY 540 PM EDT...
WIND GAP BY 545 PM EDT...
6 MILES SOUTHEAST OF SAYLORSBURG BY 550 PM EDT...
BANGOR...ROSETO AND PEN ARGYL BY 555 PM EDT...
EAST BANGOR BY 600 PM EDT...
LAT...LON 4076 7559 4097 7523 4083 7510 4063 7548
4073 7561
TIME...MOT...LOC 2126Z 234DEG 18KT 4076 7538
$$
HAYES555
WWUS51 KPHI 152135
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
535 PM EDT SUN MAY 15 2011
PAC077-152145-
/O.CAN.KPHI.SV.W.0043.000000T0000Z-110515T2200Z/
LEHIGH PA-
535 PM EDT SUN MAY 15 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL LEHIGH COUNTY IS
CANCELLED...
THE STORM THAT PROMPTED THE WARNING HAS EXITED THE AREA.
LAT...LON 4080 7550 4076 7559 4097 7523 4083 7510
4069 7537
TIME...MOT...LOC 2135Z 234DEG 18KT 4078 7533
$$
PAC089-095-152200-
/O.CON.KPHI.SV.W.0043.000000T0000Z-110515T2200Z/
NORTHAMPTON PA-MONROE PA-
535 PM EDT SUN MAY 15 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTH CENTRAL MONROE AND NORTHERN NORTHAMPTON COUNTIES...
AT 530 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR CHAPMAN...
OR 9 MILES NORTHWEST OF EASTON...MOVING NORTHEAST AT 20 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
BELFAST AND STOCKERTOWN BY 540 PM EDT...
WIND GAP BY 545 PM EDT...
6 MILES SOUTHEAST OF SAYLORSBURG BY 550 PM EDT...
PEN ARGYL BY 555 PM EDT...
BANGOR...EAST BANGOR...ROSETO AND 7 MILES SOUTH OF STORMVILLE BY
600 PM EDT...
LAT...LON 4080 7550 4076 7559 4097 7523 4083 7510
4069 7537
TIME...MOT...LOC 2135Z 234DEG 18KT 4078 7533
$$
HAYES246
WWUS51 KPHI 152152
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
552 PM EDT SUN MAY 15 2011
PAC089-095-152202-
/O.EXP.KPHI.SV.W.0043.000000T0000Z-110515T2200Z/
NORTHAMPTON PA-MONROE PA-
552 PM EDT SUN MAY 15 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MONROE AND
NORTHERN NORTHAMPTON COUNTIES WILL EXPIRE AT 600 PM EDT...
THE STORM IS WEAKENING AND ABOUT TO MOVE OUT OF THE AREA.
LAT...LON 4080 7550 4076 7559 4097 7523 4083 7510
4069 7537
TIME...MOT...LOC 2152Z 234DEG 18KT 4083 7524
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 11:46 PM EDT | Special Weather Statement | PHI | Berks, Chester, Delaware, Montgomery | 89 min |
| May 15, 12:52 AM EDT | Special Weather Statement | PHI | Bucks, Carbon, Lehigh, Monroe, Montgomery, Northampton and 1 more | 83 min |
| May 15, 2:26 PM EDT | Special Weather Statement | PHI | Berks | 64 min |
| May 15, 2:46 PM EDT | Special Weather Statement | PHI | Schuylkill | 59 min |
| May 15, 2:55 PM EDT | Special Weather Statement | PHI | Delaware | 65 min |
| May 15, 3:30 PM EDT | Special Weather Statement | PHI | Berks | 60 min |
| May 15, 3:37 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 53 min |
| May 15, 3:39 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 44 min |
| May 15, 4:14 PM EDT | Special Weather Statement | PHI | Lehigh | 61 min |
| May 15, 4:19 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 56 min |
| May 15, 4:31 PM EDT | Special Weather Statement | PHI | Delaware, Philadelphia | 59 min |
| May 15, 4:35 PM EDT | Special Weather Statement | PHI | Lehigh | 55 min |
| May 15, 4:52 PM EDT | Special Weather Statement | PHI | Northampton | 68 min |
| May 15, 5:33 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh | 57 min |
| May 15, 5:37 PM EDT | Special Weather Statement | PHI | Bucks | 53 min |
| May 15, 5:46 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 59 min |
| May 15, 6:39 PM EDT | Special Weather Statement | PHI | Berks | 66 min |
| May 15, 7:20 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 3 hr |
| May 15, 7:28 PM EDT | Special Weather Statement | PHI | Delaware, Montgomery, Philadelphia | 62 min |
| May 15, 7:37 PM EDT | Special Weather Statement | PHI | Berks | 53 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2011Every severe thunderstorm warning in 2011
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.