Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 131, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 3, 2011, 4:04 PM EDT for Bucks County, Lehigh County, Northampton County, Pennsylvania. It was in force for 56 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 3, 2011, 4:04 PM EDT (20:04 UTC)
- Expired
- Jul 3, 2011, 5:00 PM EDT
- In force
- 56 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Bucks County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 102 km from the middle of the area, began a volume at 20:04 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 3, 4:21 PM EDT | HAIL 0.25 | Bethlehem, PA | PEA SIZE HAIL IN BETHLEHEM |
| Jul 3, 4:25 PM EDT | TSTM WND DMG | Bethlehem, PA | TREE DOWN ACROSS ROAD |
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 12:00Z, 8.1 hours before the alert went out and 211 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
- 291 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 875 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
647 WUUS51 KPHI 032004 SVRPHI PAC017-077-095-032100- /O.NEW.KPHI.SV.W.0131.110703T2004Z-110703T2100Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 404 PM EDT SUN JUL 3 2011 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA... THIS INCLUDES THE CITY OF ALLENTOWN... SOUTH CENTRAL NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA... NORTHWESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 500 PM EDT * AT 400 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR NORTHAMPTON...AND MOVING SOUTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ALLENTOWN AROUND 410 PM EDT... BETHLEHEM AROUND 415 PM EDT... HELLERTOWN AROUND 425 PM EDT... SPRINGTOWN AROUND 435 PM EDT... PLEASANT VALLEY AROUND 440 PM EDT... FERNDALE AROUND 450 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 4047 7511 4034 7535 4065 7564 4079 7542 TIME...MOT...LOC 2004Z 320DEG 17KT 4066 7543 $$ IOVINO
1 follow-up statement
119 WWUS51 KPHI 032028 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 428 PM EDT SUN JUL 3 2011 PAC017-077-095-032100- /O.CON.KPHI.SV.W.0131.000000T0000Z-110703T2100Z/ LEHIGH PA-NORTHAMPTON PA-BUCKS PA- 428 PM EDT SUN JUL 3 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT FOR NORTHWESTERN BUCKS...SOUTH CENTRAL NORTHAMPTON AND SOUTHEASTERN LEHIGH COUNTIES... AT 427 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR HELLERTOWN...MOVING SOUTHEAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... SPRINGTOWN BY 435 PM EDT... PLEASANT VALLEY BY 440 PM EDT... RICHLANDTOWN BY 445 PM EDT... FERNDALE...6 MILES NORTHEAST OF QUAKERTOWN AND 9 MILES NORTHEAST OF TRUMBAUERSVILLE BY 450 PM EDT... REVERE BY 455 PM EDT... OTTSVILLE BY 500 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 4062 7554 4072 7535 4047 7511 4034 7535 TIME...MOT...LOC 2027Z 320DEG 17KT 4058 7534 $$ IOVINO
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 9:04 AM EDT | Special Weather Statement | PHI | Carbon, Monroe | 86 min |
| Jul 3, 9:38 AM EDT | Special Weather Statement | PHI | Northampton | 82 min |
| Jul 3, 11:08 AM EDT | Special Weather Statement | PHI | Monroe | 52 min |
| Jul 3, 2:11 PM EDT | Special Weather Statement | PHI | Monroe | 49 min |
| Jul 3, 2:52 PM EDT | Special Weather Statement | PHI | Carbon, Lehigh, Monroe, Northampton | 68 min |
| Jul 3, 3:17 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 5 hr |
| Jul 3, 3:48 PM EDT | Special Weather Statement | PHI | Monroe, Northampton | 72 min |
| Jul 3, 3:58 PM EDT | Areal Flood Advisory | PHI | Northampton | 4 hr |
| Jul 3, 4:19 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 56 min |
| Jul 3, 4:58 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 62 min |
| Jul 3, 6:01 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 59 min |
| Jul 3, 7:02 PM EDT | Special Weather Statement | PHI | Carbon | 58 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.