Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 101, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 19, 2010, 6:34 PM EDT for Bucks County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 56 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 19, 2010, 6:34 PM EDT (22:34 UTC)
- Expired
- Jul 19, 2010, 7:30 PM EDT
- In force
- 56 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Bucks County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 76 km from the middle of the area, began a volume at 22:36 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 19, 7:00 PM EDT | TSTM WND DMG | 2 Ese Ambler, PA | TREE DOWN ON WIRES IN UPPER DUBLIN TWP. |
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, 10.6 hours before the alert went out and 119 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
- 775 J/kg
- Mixed-layer CIN
- -101 J/kg
- Mixed-layer LCL
- 883 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
446 WUUS51 KPHI 192234 SVRPHI PAC017-091-101-192330- /O.NEW.KPHI.SV.W.0101.100719T2234Z-100719T2330Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 634 PM EDT MON JUL 19 2010 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... CENTRAL MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA... EXTREME NORTHEASTERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 730 PM EDT * AT 632 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM SPRING MOUNT TO COLLEGEVILLE...OR ALONG A LINE EXTENDING FROM 19 MILES SOUTH OF ALLENTOWN TO 16 MILES NORTHEAST OF WEST CHESTER...AND MOVING EAST AT 35 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... SOUDERTON...LANSDALE AND HATFIELD AROUND 645 PM EDT... FRICKS...CHALFONT AND AMBLER AROUND 650 PM EDT... ABINGTON AND WILLOW GROVE AROUND 655 PM EDT... GARDENVILLE AND WILLOW GROVE AROUND 700 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO DAMAGING WINDS...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 4040 7497 4010 7499 4016 7550 4033 7551 TIME...MOT...LOC 2234Z 256DEG 32KT 4032 7543 4014 7539 $$ GORSE
1 follow-up statement
754 WWUS51 KPHI 192252 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 652 PM EDT MON JUL 19 2010 PAC017-091-101-192330- /O.CON.KPHI.SV.W.0101.000000T0000Z-100719T2330Z/ PHILADELPHIA PA-MONTGOMERY PA-BUCKS PA- 652 PM EDT MON JUL 19 2010 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR CENTRAL BUCKS...CENTRAL MONTGOMERY AND EXTREME NORTHEASTERN PHILADELPHIA COUNTIES... AT 650 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM FRICKS TO FORT WASHINGTON...OR ALONG A LINE EXTENDING FROM 21 MILES NORTH OF PHILADELPHIA TO 9 MILES NORTHWEST OF PHILADELPHIA...MOVING EAST AT 40 MPH. SEVERE THUNDERSTORMS WILL BE NEAR... NEW BRITAIN...MAPLE GLEN...FORT WASHINGTON AND CHALFONT BY 655 PM EDT... ROBESONIA...ABINGTON...WILLOW GROVE AND WARMINSTER HEIGHTS BY 700 PM EDT... GARDENVILLE AND IVYLAND BY 705 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO DAMAGING WINDS...FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 4034 7542 4040 7497 4010 7499 4015 7542 TIME...MOT...LOC 2250Z 256DEG 33KT 4029 7526 4012 7522 $$ GORSE
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 5:15 AM EDT | Special Weather Statement | PHI | Berks | 60 min |
| Jul 19, 6:04 AM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh, Monroe, Montgomery, Northampton | 56 min |
| Jul 19, 6:58 AM EDT | Special Weather Statement | PHI | Carbon, Lehigh, Monroe, Northampton | 62 min |
| Jul 19, 7:46 AM EDT | Special Weather Statement | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 59 min |
| Jul 19, 8:19 AM EDT | Special Weather Statement | PHI | Montgomery | 56 min |
| Jul 19, 8:47 AM EDT | Special Weather Statement | PHI | Delaware | 58 min |
| Jul 19, 9:07 AM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 53 min |
| Jul 19, 2:09 PM EDT | Special Weather Statement | PHI | Carbon | 51 min |
| Jul 19, 2:21 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 54 min |
| Jul 19, 4:24 PM EDT | Special Weather Statement | PHI | Carbon | 36 min |
| Jul 19, 5:11 PM EDT | Special Weather Statement | PHI | Monroe | 49 min |
| Jul 19, 5:24 PM EDT | Special Weather Statement | PHI | Northampton | 51 min |
| Jul 19, 5:25 PM EDT | Special Weather Statement | PHI | Chester, Delaware, Montgomery | 65 min |
| Jul 19, 5:39 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 66 min |
| Jul 19, 6:22 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 53 min |
| Jul 19, 6:57 PM EDT | Special Weather Statement | PHI | Berks, Lehigh, Northampton | 48 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2010Every severe thunderstorm warning in 2010
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.