Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 133, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 3, 2011, 4:58 PM EDT for Bucks County, Montgomery County, Pennsylvania. It was in force for 62 min. 1 report 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, 4:58 PM EDT (20:58 UTC)
- Expired
- Jul 3, 2011, 6:00 PM EDT
- In force
- 62 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Bucks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 80 km from the middle of the area, began a volume at 20:59 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, 5:05 PM EDT | TSTM WND DMG | Perkasie, PA | POWER POLES AND WIRES DOWN |
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, 9.0 hours before the alert went out and 205 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.
263
WUUS51 KPHI 032058
SVRPHI
PAC017-091-032200-
/O.NEW.KPHI.SV.W.0133.110703T2058Z-110703T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
458 PM EDT SUN JUL 3 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
EAST CENTRAL MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 600 PM EDT
* AT 458 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
PLEASANT VALLEY...AND MOVING SOUTHEAST AT 25 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
OTTSVILLE AROUND 505 PM EDT...
BEDMINSTER AND PERKASIE AROUND 510 PM EDT...
DUBLIN AND PIPERSVILLE AROUND 515 PM EDT...
ROBESONIA...GARDENVILLE AND FRICKS AROUND 525 PM EDT...
DOYLESTOWN AND CHALFONT AROUND 530 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 4010 7516 4049 7543 4056 7530 4060 7523
4025 7489
TIME...MOT...LOC 2058Z 326DEG 21KT 4047 7527
$$
IOVINO1 follow-up statement
037 WWUS51 KPHI 032126 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 526 PM EDT SUN JUL 3 2011 PAC017-091-032200- /O.CON.KPHI.SV.W.0133.000000T0000Z-110703T2200Z/ MONTGOMERY PA-BUCKS PA- 526 PM EDT SUN JUL 3 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT FOR CENTRAL BUCKS AND EAST CENTRAL MONTGOMERY COUNTIES... AT 525 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR ROBESONIA...MOVING SOUTHEAST AT 25 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... MONTGOMERYVILLE BY 530 PM EDT... MAPLE GLEN BY 545 PM EDT... IVYLAND...WARMINSTER HEIGHTS...HATBORO AND HORSHAM BY 550 PM EDT... CHURCHVILLE...RICHBORO...NEWTOWN AND WILLOW GROVE BY 555 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 4010 7516 4038 7535 4046 7509 4025 7489 TIME...MOT...LOC 2126Z 326DEG 21KT 4033 7515 $$ 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, 4:04 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 56 min |
| Jul 3, 4:19 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 56 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.