Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 75, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 5, 2012, 1:41 AM EDT for 6 counties in 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
- Jul 5, 2012, 1:41 AM EDT (05:41 UTC)
- Expired
- Jul 5, 2012, 2:15 AM EDT
- In force
- 34 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Berks County, PA, Bucks County, PA, Carbon County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 111 km from the middle of the area, began a volume at 05:41 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 00:00Z, 5.7 hours before the alert went out and 221 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
- 1802 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1100 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 189 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 3.9
The text
As transmitted, in the capitals the NWS used until 2016.
065 WUUS51 KPHI 050541 SVRPHI PAC011-017-025-077-091-095-050615- /O.NEW.KPHI.SV.W.0075.120705T0541Z-120705T0615Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ ISSUED BY NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 141 AM EDT THU JUL 5 2012 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN BERKS COUNTY IN EASTERN PENNSYLVANIA... LEHIGH COUNTY IN EASTERN PENNSYLVANIA... THIS INCLUDES THE CITIES OF...SLATINGTON...HOKENDAUQUA...FOUNTAIN HILL...EMMAUS...COPLAY...CATASAUQUA...ALLENTOWN... SOUTHWESTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA... THIS INCLUDES THE CITIES OF...NORTHAMPTON...HELLERTOWN... SOUTH CENTRAL CARBON COUNTY IN NORTHEAST PENNSYLVANIA... THIS INCLUDES THE CITY OF PALMERTON... NORTHWESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... THIS INCLUDES THE CITY OF QUAKERTOWN... NORTHWESTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA... THIS INCLUDES THE CITY OF EAST GREENVILLE... * UNTIL 215 AM EDT * AT 138 AM 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 SCHNECKSVILLE...OR 9 MILES WEST OF HOKENDAUQUA...AND MOVING SOUTHEAST AT 35 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NORTH CATASAUQUA...TOPTON...ANCIENT OAKS...ALBURTIS...MACUNGIE... FREEMANSBURG...COOPERSBURG...PENNSBURG...RED HILL AND RICHLANDTOWN PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 GREATEST KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 4049 7512 4026 7552 4066 7584 4085 7568 TIME...MOT...LOC 0541Z 320DEG 30KT 4061 7564 $$
1 follow-up statement
712 WWUS51 KPHI 050607 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 207 AM EDT THU JUL 5 2012 PAC011-017-025-077-091-095-050615- /O.EXP.KPHI.SV.W.0075.000000T0000Z-120705T0615Z/ BERKS PA-BUCKS PA-LEHIGH PA-MONTGOMERY PA-CARBON PA-NORTHAMPTON PA- 207 AM EDT THU JUL 5 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NORTHAMPTON... SOUTH CENTRAL CARBON...NORTHWESTERN MONTGOMERY...LEHIGH... NORTHWESTERN BUCKS AND NORTHEASTERN BERKS COUNTIES WILL EXPIRE AT 215 AM EDT... THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED, THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY. LAT...LON 4049 7512 4026 7552 4066 7584 4085 7568 TIME...MOT...LOC 0605Z 320DEG 30KT 4046 7547 $$ GORSE
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 9:18 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 57 min |
| Jul 4, 10:37 PM EDT | Special Weather Statement | PHI | Berks, Lehigh | 38 min |
| Jul 4, 11:07 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 27 min |
| Jul 4, 11:14 PM EDT | Special Weather Statement | PHI | Bucks, Lehigh | 46 min |
| Jul 4, 11:37 PM EDT | Special Weather Statement | PHI | Montgomery | 38 min |
| Jul 4, 11:45 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 28 min |
| Jul 5, 1:34 AM EDT | Special Weather Statement | PHI | Lehigh | 56 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2012Every severe thunderstorm warning in 2012
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.